WO2018185943A1 - 蛍光プレミックス粒子、それを含有する蛍光染色液、およびそれらを用いた蛍光染色法 - Google Patents
蛍光プレミックス粒子、それを含有する蛍光染色液、およびそれらを用いた蛍光染色法 Download PDFInfo
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- WO2018185943A1 WO2018185943A1 PCT/JP2017/014569 JP2017014569W WO2018185943A1 WO 2018185943 A1 WO2018185943 A1 WO 2018185943A1 JP 2017014569 W JP2017014569 W JP 2017014569W WO 2018185943 A1 WO2018185943 A1 WO 2018185943A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D515/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen, oxygen, and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
- C07D515/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen, oxygen, and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains two hetero rings
- C07D515/04—Ortho-condensed systems
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
- C07K14/36—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria from Actinomyces; from Streptomyces (G)
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/531—Production of immunochemical test materials
- G01N33/532—Production of labelled immunochemicals
- G01N33/533—Production of labelled immunochemicals with fluorescent label
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54313—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being characterised by its particulate form
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/58—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances
- G01N33/582—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving labelled substances with fluorescent label
Definitions
- the present invention relates to a fluorescent premix particle, a fluorescent staining solution containing the same, and a fluorescent staining method using them.
- a specimen slide is prepared using tissues and cells collected from a patient, and the morphology of cells or tissues is observed based on a stained image obtained by staining with a predetermined method, and a specific living body is observed.
- evaluating the expression state of a substance it is a method for determining various events such as whether or not the patient suffers from a specific disease or whether a specific therapeutic drug is successful.
- HER2 gene (HER2 / neu, c-erbB-2) which is a kind of oncogene and / or a membrane protein produced from the HER2 gene
- HER2 / neu, c-erbB-2 a HER2 gene which is a kind of oncogene and / or a membrane protein produced from the HER2 gene
- the HER2 protein is thought to perform signal transduction by forming a homodimer or a heterodimer bound to activated EGFR (HER1), HER3 or HER4, and as a receptor for cancer cell growth factor. Presumed to be functional (to date no endogenous ligand binding to HER2 is known).
- Examples of HER2 testing methods for tumor tissues include immunohistochemistry (IHC) method for staining HER2 protein and fluorescent in situ hybridization (FISH) method for staining HER2 gene.
- IHC immunohistochemistry
- FISH fluorescent in situ hybridization
- ASCO testing procedures and criteria
- the ASCO / CAP HER2 testing guidelines published in 2007 and revised in 2013 published by the American Society of Clinical Oncology and the American Pathology Society are widely used in various countries.
- a HER2 examination guide (HER2 examination guide fourth edition, HER2 examination pathology committee, April 2014) compliant with the revised ASCO / CAP HER2 examination guideline is used.
- an enzyme-labeled antibody is brought into contact with a specimen, and a target protein and antibody are bound directly or indirectly using an antigen-antibody reaction, and then a substrate corresponding to the enzyme is added.
- a method of developing a color by reacting is generally used. For example, a DAB staining method using peroxidase as an enzyme and diaminobenzidine as a substrate is widely adopted.
- the staining method based on the reaction between the enzyme and the substrate greatly depends on conditions such as temperature and time, so that the amount of protein that is the actual target can be accurately determined from the coloring concentration. There was a problem that it was difficult to estimate.
- phosphor-aggregated particles die resin particles in which the particle surface is modified with streptavidin are prepared, and an antigen (HER2 protein) on a tissue section is prepared.
- a primary antibody anti-HER2 rabbit monoclonal antibody
- biotin anti-rabbit IgG antibody
- streptavidin-modified phosphor-aggregated particles are collected.
- a fluorescence labeling method avidin-biotin combined secondary antibody method
- production of streptavidin-modified phosphor-aggregated particles is carried out by the following method.
- Patent Document 2 International Publication No. 2016/129444
- an appropriate number of disulfide bonds (—S—S—) are reduced to form a thiol group (—SH) by treatment with a specific reducing agent.
- a specific reducing agent for example, sodium thiol group
- a binding group capable of reacting with the thiol group for example, maleimide group
- an appropriate number of antibodies per unit area of the particle surface can be bound.
- Antibody-bound phosphor-integrated nanoparticles have been disclosed.
- the antibody may be a primary antibody used in a direct method in the IHC method, a secondary antibody used in an indirect method, or the like.
- Patent Document 2 an embodiment in which HER2 immunostaining is performed using antibody-modified fluorescent dye-encapsulated silica nanoparticles prepared by the following method is disclosed.
- Fluorescent dye-encapsulated silica nanoparticles are formed using 3-aminopropyltrimethoxysilane and 5-carboxytetramethylrhodamine (registered trademark “TAMRA”) as raw materials, and succinimidyl as a linker on the silica nanoparticles -[(N-maleimidopropionamide) -dodecaethylene glycol] ester (product name “SM (PEG) 12 ”) is reacted to introduce maleimide groups on the particle surface.
- TAMRA 3-aminopropyltrimethoxysilane and 5-carboxytetramethylrhodamine
- a primary antibody (anti-HER2 rabbit monoclonal antibody) or secondary antibody (anti-rabbit IgG antibody) is treated with 2-mercaptoethanol or the like as a reducing agent to reduce a disulfide bond to generate a thiol group. .
- the target protein contained in the specimen can be fluorescently labeled with a certain degree of accuracy.
- the binding to the target protein is insufficient, and depending on the staining conditions, the sensitivity, that is, the target protein may not be detected with sufficient accuracy, and there is room for improvement in the staining property.
- the configuration example of the present invention is as follows.
- the number of the target protein-binding substances linked per unit area of the surface of the phosphor-aggregated particles is 0.003 to 0.012 / nm 2 [1] to [5]
- the fluorescent premix particle according to any one of the above.
- a staining method using a fluorescent staining liquid containing the fluorescent premix particles according to [4], A fluorescence staining method, comprising: a treatment of binding the primary antibody to a target protein; and a treatment of binding the fluorescent premix particles in the fluorescent staining solution to the primary antibody bound to the target protein.
- a staining method using the fluorescent staining liquid according to [8] A fluorescent staining method comprising a treatment of directly or indirectly binding each of the corresponding fluorescent premix particles in the fluorescent staining solution to each of two or more kinds of target proteins.
- the present invention it is possible to remarkably improve the sensitivity when fluorescently labeling a target protein as compared with the prior art and improve the accuracy of quantification of the target protein.
- FIG. 1 is a schematic diagram showing fluorescent premix particles according to an embodiment of the present invention.
- [1A] represents a phosphor-aggregated particle (10) modified with a first reactive substance (20), for example, streptavidin (21) via a linker (15), and [1B] represents a second reactive substance.
- the target protein-binding substance (antibody or aptamer) (40) modified with a substance (30), for example, biotin (31), is shown
- [1C] is the first reactive substance (20) of [1A] and
- the fluorescent premix particle (1) formed by the 2nd reactive substance (30) of [1B] being connected by interaction is shown.
- FIG. 2 is a schematic diagram showing the procedure of one embodiment (primary reaction type staining method) of the fluorescence staining method of the present invention using fluorescent premix particles to which primary antibodies are linked.
- [2A] shows a state in which the target protein (150) on the tissue section (100) is unreacted before starting the staining step, and [2B] shows that the primary antibody (41) is added to the target protein (150). The process which couple
- FIG. 3 is a schematic diagram showing the procedure of one embodiment (secondary reaction type staining method) of the fluorescent staining method of the present invention using fluorescent premix particles to which secondary antibodies are linked.
- FIG. 4 is a schematic diagram showing the procedure of one embodiment of the fluorescent staining method according to the conventional secondary antibody method using biotin-avidin.
- [4A] shows a state in which the target protein (150) on the tissue section (100) is unreacted before the staining step is started, and [4B] binds the primary antibody (41) to the target protein (150).
- [4C] represents the treatment of binding the secondary antibody (42) modified with biotin (31) to the primary antibody (41), and [4D] represents the streptoid to biotin (31).
- bonds the fluorescent substance integration particle (10) modified with avidin (21) is shown.
- FIG. 5 is a fluorescent staining image taken in Comparative Example 1.
- FIG. 6 is a fluorescent staining image taken in Example 1.
- the fluorescent premix particle according to an embodiment of the present invention is at least one selected from the group consisting of a phosphor aggregated particle modified with a first reactive substance and an antibody and aptamer modified with a second reactive substance. It is a complex in which a target protein-binding substance of a species is bound by the interaction between the first reactive substance and the second reactive substance.
- the present inventor for example, in a conventional fluorescent staining method such as the embodiment (Avidin-biotin combined secondary antibody method) disclosed in Patent Document 1 described above, streptavidin-modified phosphor-integrated particles and biotin-labeled primary Alternatively, a complex is prepared by previously reacting (premixing) with a secondary protein-binding substance, and the complex is bound to a protein of interest contained in a specimen (eg, tissue section), or It has been found that the sensitivity of the fluorescent label is remarkably improved by modifying the method of binding the primary antibody to the target protein and then binding the complex to the primary antibody.
- a specimen eg, tissue section
- the reason for this is considered as follows.
- streptavidin is used as the first reactive substance and biotin is used as the second reactive substance
- a maximum of four biotin-labeled target protein binding substances are bound to each streptavidin on the surface of the phosphor-aggregated particles. (Up to four biotin molecules bind to one streptavidin molecule), so the phosphor-aggregated particles can carry an extremely large number of target protein binding substances, and target proteins and primary antibodies The coupling efficiency to is significantly increased.
- fluorescent premix particles are usually contained in a fluorescent staining solution, in other words, used to produce a fluorescent staining solution. Since the fluorescent premix particle itself functions as a “fluorescent staining solution” that binds to and is fluorescently labeled with the target protein, the target protein-binding substance linked to the fluorescent premix particle before binding to the target protein is not yet present. The state of reaction.
- conventional immunostaining methods for example, an embodiment in which a primary antibody is reacted with a target protein, a biotin-modified secondary antibody is reacted with the primary antibody, and streptavidin-modified phosphor-integrated nanoparticles are further reacted.
- biotin-avidin combined secondary antibody method since the secondary antibody reacts with the primary antibody, it does not correspond to the fluorescent premix particles.
- the fluorescent premix particles it is preferable that an appropriate number of target protein-binding substances are linked to the surface of one phosphor-aggregated particle.
- the number of target protein binding substance linked per unit area of the surface of the phosphor integrated particles is preferably 0.003 pieces / nm 2 or more, 0.003 cells / nm 2 or more 0. 012 pieces / nm 2 or less is more preferable.
- the target protein-binding substance in an appropriate range or the preferred range can be obtained on the surface. Phosphor-aggregated particles linked to can be produced.
- the number of target protein-binding substances linked per unit area on the surface of the phosphor-aggregated particles is determined as follows by applying the method described in, for example, International Publication No. 2015/159976. Can: (I) measuring the number per unit area of the first reactive substance introduced into the surface of the phosphor-aggregated particles; (Ii) A coefficient is determined as to how many second reactive substances (target protein-binding substance modified by) bind to one first reactive substance (for example, first reactive substance) 4 if the substance is avidin or the like, and 1 if the first reactive substance is an anti-hapten antibody); (Iii) The maximum number of target protein binding substances that can be linked per unit area of the surface of the phosphor-aggregated particle by multiplying the number per unit area of (i) by the coefficient of (ii) Considered as a value; (Iv) When the amount of the target protein-binding substance modified with the second reactive substance added for the reaction is larger than the maximum value of (iii), the maximum value is expressed in units
- the first reactive substance and the second reactive substance are a combination of substances that specifically bind to each other by interaction, and both are a target protein binding substance and a target protein to which it binds (or 2 Or a substance that does not react with the specific binding to the third or higher order protein binding substance).
- the first reactive substance and the second reactive substance are not limited, but for example, when the target protein (antigen etc.) and the labeling substance (phosphor etc.) are indirectly bound in a known staining method. You can choose from those in use.
- an avidin such as avidin, streptavidin or neutravidin, preferably streptavidin is selected as the first reactive substance
- Biotin can be selected as the reactive substance.
- the target biological substance can be detected with higher sensitivity.
- a hapten (a substance having a relatively low molecular weight that has no immunogenicity but exhibits antigenicity and can react with an antibody) and an anti-hapten antibody are used. It can also be used as a reactive substance and a second reactive substance.
- Examples of the combination of a hapten and an anti-hapten antibody include dicoxigenin and anti-dicoxigenin antibody, FITC (fluorescein isothiocyanate) and anti-FITC antibody, DNP (2,4-dinitrophenyl) and anti-DNP antibody.
- the target protein-binding substance is at least one selected from the group consisting of antibodies and aptamers, and is a substance that can bind directly or indirectly to the target protein.
- the target protein binding substance may be two or more kinds, but is usually one kind.
- the antibody is not particularly limited as long as it is an antibody that can bind directly or indirectly to the target protein in the immunostaining method.
- the antibody may be a primary antibody that specifically binds to a target protein (antigen), a secondary antibody that specifically binds to the primary antibody, or a higher-order antibody.
- a primary antibody or a secondary antibody is preferable.
- a primary antibody is an antibody that recognizes and binds to a unique epitope to an antigen, and is used by mixing two or more types of monoclonal antibodies, which are preferably monoclonal antibodies over polyclonal antibodies from the viewpoint of the stability of quantification of the target protein. In this case, a combination of monoclonal antibodies that specifically bind to different epitopes for each antibody is preferable.
- the immunized animal producing the primary antibody is not particularly limited and can be selected from general animals such as mouse, rat, guinea pig, rabbit, goat, sheep and the like.
- Secondary antibodies or higher antibodies are unique epitopes of primary antibodies or lower antibodies, preferably in regions not involved in binding of these antibodies to target proteins (antigens) etc. (Fc etc.)
- An antibody that recognizes and binds to an existing epitope is preferably a monoclonal antibody from the viewpoint of the stability of quantification of the target protein, but a polyclonal antibody may be used from an economical viewpoint.
- An immunized animal that produces a secondary antibody or the like is an animal species that produces a primary antibody or the like or an animal species that forms a region such as Fc from among the animal species or the like exemplified as an immunized animal that produces a primary antibody.
- an appropriate animal may be selected. For example, when a natural mouse antibody (IgG produced by a mouse) is used as a primary antibody, an antibody that specifically binds to mouse IgG produced by an immunized animal other than a mouse (such as a rabbit) as a secondary antibody It is appropriate to use
- the antibody may be of any isotype, but is usually IgG or IgM, with IgG being particularly preferred.
- the antibody may be a natural antibody such as full-length IgG as long as it has the ability to specifically recognize and bind to the target protein or lower-order antibody, or Fab, Fab ′, F (ab ′ 2 )
- Non-natural antibodies such as antibody fragments such as 2 , Fv, scFv, or artificial antibodies multi-functionalized (multivalent or multispecific) using these antibody fragments may be used. .
- it may be a natural antibody derived from a specific immunized animal (for example, a mouse antibody produced by a mouse), a chimeric antibody or a humanized antibody prepared by an artificial means using a vector or the like.
- a specific immunized animal for example, a mouse antibody produced by a mouse
- a chimeric antibody or a humanized antibody prepared by an artificial means using a vector or the like Alternatively, it may be a fully human antibody.
- the aptamer is not particularly limited as long as the aptamer can specifically label the target protein by a method according to an immunostaining method (direct method or indirect method) using an antibody.
- the aptamer may be a primary aptamer that specifically binds to a target protein, a secondary antibody that specifically binds to a primary antibody or primary aptamer bound to the target protein, or higher higher order. Although aptamer may be sufficient, it is preferable that it is a primary aptamer or a secondary aptamer.
- Aptamers can be broadly classified into nucleic acid (DNA or RNA) aptamers and peptide aptamers, as long as they have the ability to specifically recognize and bind to the target protein or an antibody or lower order aptamer bound to the target protein. Either an aptamer or a peptide aptamer may be used.
- Nucleic acid aptamers and peptide aptamers can be prepared by known methods.
- the phosphor-aggregated particles are not particularly limited, but phosphors (for example, fluorescent dyes) are formed inside or on the surface of the base particles made of organic or inorganic substances. Nano-sized particles having a structure in which a plurality of particles are fixed and accumulated (diameter of 1 ⁇ m or less) are preferable, and particles that can emit fluorescence with sufficient luminance are preferable.
- Such phosphor-aggregated particles have a higher fluorescence intensity (brightness) when labeling the target protein compared to the case where the phosphor is used alone (one molecule without being accumulated), and the cell self-propagation. It is preferably used in fluorescent staining because it is highly distinguishable from noise such as fluorescence and other dyes, and is less likely to be deteriorated by irradiation with excitation light (higher light resistance) than a phosphor alone.
- the phosphor accumulated on the phosphor-aggregated particles is not particularly limited, and various known organic fluorescent dye molecules and semiconductor nanoparticles (sometimes referred to as quantum dots) can be used, for example.
- organic fluorescent dye integrated particles phosphor integrated particles when organic fluorescent dyes are used as phosphors
- semiconductor nanoparticles are used as phosphors
- inorganic phosphor integrated particles phosphor integrated particles when semiconductor nanoparticles are used as phosphors
- a phosphor that emits fluorescence having a desired wavelength (color) may be selected according to a desired use.
- Organic fluorescent dye integrated particles are preferably nano-sized fluorescent particles in which a plurality of organic fluorescent dyes are integrated inside or on the surface of a substance serving as a base of the particles.
- organic fluorescent dye examples include a fluorescein dye, a rhodamine dye, an Alexa Fluor (registered trademark, manufactured by Invitrogen) dye, a BODIPY (registered trademark, manufactured by Invitrogen) dye, and a cascade (registered trademark, Invitrogen).
- Low molecular organic compounds such as dyes, coumarin dyes, NBD (registered trademark) dyes, pyrene dyes, cyanine dyes, perylene dyes, oxazine dyes, and pyromethene dyes ).
- rhodamine dyes such as sulforhodamine 101 and its hydrochloride, such as TexasRed (registered trademark), perylene dyes such as perylene diimide, and pyromethene dyes such as pyromethene 556 are preferable because of their relatively high light resistance.
- Examples of the matrix constituting the organic fluorescent dye integrated particles include substances that can integrate organic fluorescent dyes with physical or chemical bonding force, such as resin and silica, and resins are preferable.
- resins are preferable.
- Hydrophobic compounds such as polystyrene, polymelamine, and silica, particularly melamine resins and styrene resins, are preferred because they facilitate the production of fluorescent dye-aggregated particles and provide particles with high emission intensity.
- organic fluorescent dye integrated particles produced using a fluorescent dye such as perylene diimide, sulforhodamine 101 or its hydrochloride (Texas Red), pyromethene as a phosphor, and a resin such as melamine resin or styrene resin as a matrix. From the viewpoint of excellent labeling performance and the like, the phosphor-aggregated particles are preferable.
- the inorganic phosphor aggregated particles are preferably nano-sized phosphor particles in which a plurality of semiconductor nanoparticles are accumulated inside or on the surface of a substance serving as a base of the particles.
- the semiconductor nanoparticles are not particularly limited, and examples thereof include II-VI group compounds, III-V group compounds, or quantum dots containing group IV elements, and particle dots such as CdSe exemplified in International Publication No. 2012/130347. It is done.
- quantum dots having semiconductor nanoparticles as a core and a shell around the core.
- the core is CdSe and the shell is ZnS, it is expressed as CdSe / ZnS.
- semiconductor nanoparticles having a shell include CdSe / ZnS exemplified in International Publication No. 2012/130347.
- the semiconductor nanoparticles may be surface-treated with an organic polymer or the like as necessary.
- an organic polymer or the like for example, CdSe / ZnS (manufactured by Invitrogen) whose particle surface is modified with a carboxy group, CdSe / ZnS (manufactured by Invitrogen) whose particle surface is modified with an amino group, and the like can be used.
- Examples of the matrix constituting the inorganic phosphor aggregated particles include substances that can integrate semiconductor nanoparticles with physical or chemical bonding force, such as resin and silica, and resins are preferable.
- the resin include thermosetting resins such as melamine resin, urea resin, benzoguanamine resin, phenol resin, xylene resin; styrene resin, (meth) acrylic resin, polyacrylonitrile, AS resin (acrylonitrile-styrene copolymer). And various types of homopolymers and copolymers prepared using one or more monomers such as ASA resin (acrylonitrile-styrene-methyl acrylate copolymer).
- organic fluorescent dye-aggregated particles and the inorganic phosphor aggregates are publicly known, and details such as the phosphor used for the production thereof and the matrix and the production method, and specific examples of the embodiments are described in, for example, International Publication No. 2013/035703, Reference may be made to International Publication No. 2013/147081, International Publication No. 2014/136776, and the like.
- the average particle diameter of the phosphor-aggregated particles is preferably 30 to 300 nm, more preferably 40 to 160 nm. In general, the smaller the particle size, the larger the specific surface area and the higher the binding force with the specimen. However, when the average particle size is less than 30 nm, the bright spot that should be observed in the fluorescence observation due to the phosphor integrated particles May not be observed at all or may be difficult to observe. Conversely, when the average particle diameter of the phosphor-aggregated particles exceeds 300 nm, it is difficult to accurately count the bright spots without separating the bright spots, such as too many bright spots observed in fluorescence observation. There is a case.
- the coefficient of variation indicating the variation in the particle diameter of the phosphor integrated particles is not particularly limited, but is preferably about 20% or less.
- the particle diameter of the phosphor integrated particles is a diameter obtained by taking an image using a scanning electron microscope (SEM), measuring the cross-sectional area of the resin particles for fluorescent labeling, and setting the measured value as the area of a corresponding circle. It can be measured as (area circle equivalent diameter). After measuring the particle diameter of each of the phosphor-aggregated particles contained in a sufficient number (for example, 1000) of the population, the average particle diameter is calculated as the arithmetic average thereof, and the coefficient of variation is expressed by the formula: 100 ⁇ grains Calculated by standard deviation of diameter / average particle diameter.
- the average particle diameter of the phosphor-aggregated particles can be adjusted within a desired range by adjusting the conditions during the production.
- an emulsion polymerization method specifically, (co) polymerizing monomers for synthesizing a resin (thermoplastic resin or thermosetting resin) as a base material of the particles.
- a resin thermoplastic resin or thermosetting resin
- the phosphor is added and the phosphor is incorporated into or on the surface of the (co) polymer.
- micelles having an aqueous phase on the outside and an oil phase on the inside are formed by the surfactant, and the monomer constituting the resin is included in the oil phase inside the micelle.
- a polymerization reaction is performed inside.
- the average particle diameter is 30 to 30%. 300 nm particles can be produced.
- the average particle size of the fluorescent dye-aggregated particles can also be changed by changing the ratio of the resin raw material and the phosphor used in the production of the fluorescent dye-aggregated particles to the entire reaction system. The diameter can be adjusted.
- the average particle size of the inorganic phosphor aggregated particles is, for example, after producing the inorganic phosphor aggregated particles, classified by a size selective precipitation method, and collecting a fraction of the inorganic phosphor aggregated particles having a predetermined particle size.
- it can be within a predetermined range.
- an adsorbate having a lipophilic group is adsorbed on the surface of the inorganic phosphor aggregated particle in advance, and then the inorganic phosphor aggregated particle is dispersed in the lipophilic solvent, and amphiphilic addition is added to the solvent.
- the agent is added little by little to cause precipitation.
- the dispersibility of the inorganic phosphor aggregated particles strongly depends on the interaction between the adsorbing group on the particle surface and the solvent, so that by gradually adding the additive, aggregated precipitates are formed in order from the large-sized inorganic phosphor aggregated particles.
- the precipitate is recovered by centrifugation and redispersed in a solvent, whereby inorganic phosphor-aggregated particles having a narrow particle size distribution can be obtained.
- examples of the adsorbate having a lipophilic group include compounds having an alkyl group such as heptane, octane, and dodecane, and compounds having 8 to 12 carbon atoms are preferable.
- examples of the lipophilic solvent include pyridine and hexane
- examples of the amphiphilic additive include chloroform and methanol.
- lipophilic groups that can be adsorbed on the surface of inorganic phosphors such as quantum dots include phosphino groups such as trioctylphosphine (TOP), phosphine oxide groups such as trioctylphosphine oxide (TOPOT), phosphate groups, amino groups, etc. Is mentioned.
- phosphino groups such as trioctylphosphine (TOP)
- phosphine oxide groups such as trioctylphosphine oxide (TOPOT)
- phosphate groups amino groups, etc. Is mentioned.
- the fluorescent premix particle includes a phosphor-aggregated particle modified with a first reactive substance, and a target protein binding substance modified with a second reactive substance.
- the first reactive substance and the second reactive substance The manufacturing method is not particularly limited as long as it has a structure that is connected by the interaction with the.
- the phosphor-aggregated particles modified with the first reactive substance and the target protein-binding substance modified with the second reactive substance are prepared, and then mixed in an appropriate dispersion medium such as PBS.
- an appropriate dispersion medium such as PBS.
- it can be manufactured by the following first to third steps.
- First step Step of preparing phosphor-aggregated particles modified with a first reactive substance
- the first step comprises phosphor-aggregated particles modified with a first reactive substance (hereinafter referred to as “first reactive substance-modified fluorescence”). It is also a process for preparing “body accumulated particles”).
- This step is for preparing phosphor-aggregated particles modified with streptavidin or the like (first reactive substance in the present invention) used in an immunostaining method (ABC method) using a conventional avidin-biotin complex. It can be set as the embodiment similar to this process.
- the first reactive substance can be produced according to a known method.
- the reactive site of the synthesized fluorescent particle and the first reactive substance may be directly linked by a covalent bond or the like, or indirectly, specifically, a linker having reactive functional groups at both ends. And reacting each reactive functional group of the linker with the reactive site of the phosphor-aggregated particle and the reactive site of the first reactive substance to form a covalent bond,
- the first reactive substance may be linked via a linker.
- the reactive site possessed by the first reactive substance examples include amino groups, carboxy groups, and thiol groups possessed by general proteins.
- the reactive site may be a site originally possessed by the first reactive substance, or is introduced into the first reactive substance by using a treatment agent (compound) other than the linker (eg, silane coupling). It may be a site introduced to the particle surface by reacting with a compound such as an agent.
- a treatment agent compound
- silane coupling e.g, silane coupling
- It may be a site introduced to the particle surface by reacting with a compound such as an agent.
- the first reactive substance is a protein such as streptavidin
- SATA N-succinimidyl S-acetylthioacetate
- a thiol group By introducing a thiol group into the amino group originally possessed by the first reactive substance, or by using a reducing agent such as dithiothreitol (DTT). Include a method of generating a thiol group by cleaving the disulfide bond (—S—S—) originally possessed by When such a thiol group is used as a reactive site possessed by the first reactive substance, the reactive functional group that the linker used to bind the phosphor-aggregated particles and the first reactive substance should have a thiol group. Those capable of reacting with, for example, maleimide groups are preferred.
- the linker may have a reactive functional group that can react with the reactive site of the first reactive substance at one or both ends, and the reactive functional groups at both ends may be the same or different. May be.
- the linker may be a compound having a chain structure such as a polyoxyalkylene moiety in the molecule, typically a PEG (polyethylene glycol) chain.
- the function of the linker may be performed by the silane coupling agent itself as described below.
- silanol groups on the surface of the silica particles may be used as reactive sites of the phosphor accumulation particles (silica particles), or a silane coupling agent is used. Then, reactive sites other than silanol groups introduced on the surface of the silica particles may be used.
- the silane coupling agent used here is a compound having a hydrolyzable group such as an alkoxy group, an acetoxy group or a halo group at one end and a functional group such as an amino group, a mercapto group or an epoxy group at the other end.
- a hydrolyzable group such as an alkoxy group, an acetoxy group or a halo group at one end
- a functional group such as an amino group, a mercapto group or an epoxy group at the other end.
- a functional group such as the amino group described above can be introduced.
- the introduced functional group such as an amino group may be used for reacting itself with the reactive site of the first reactive substance, and if necessary, the reactive functional group at one end of the linker.
- the reactive functional group at the other end of the linker may be used to react with the reactive site of the first reactive substance.
- a mercapto group or amino group introduced by a silane coupling agent is used as a reactive site of the phosphor-aggregated particles
- a maleimide group or an N-hydroxysuccinimide (NHS) group is formed at one end as a reactive functional group for the reactive site. It is preferable to use a linker having
- the reactive sites of the phosphor-aggregated particles are synthesized by the raw materials (monomers, etc.) used to synthesize the resin. It may be a functional group remaining afterwards, or may have a predetermined structure formed by a resin synthesis reaction, or by using a treatment agent (compound) other than the linker described above, the phosphor
- aggregation particles originally have may be sufficient.
- a silane coupling agent having a hydrolyzable group (for example, trialkoxy group) for adsorbing to the melamine resin at one end and an amino group at the other end Or reacting with linkers having amino groups at both ends, to introduce amino groups as reactive functional groups corresponding to the reactive sites of the first reactive substance on the surface of the melamine resin particles can do.
- one amino group of the linker reacts with the reactive site of the melamine resin, for example, melamine and formaldehyde used in the synthesis of the melamine resin in advance. It is a reactive functional group for the methylol group (—CH 2 OH) possessed by methylol melamine that is produced when it is made to react, and the etherified product (—CH 2 OR) produced by further reaction with alcohol.
- phosphor-aggregated particles whose base material is a styrene resin
- a monomer having a functional group such as an amino group or an epoxy group in the side chain that can be copolymerized with styrene is used when the styrene resin is synthesized.
- styrene resin particles having a functional group such as an amino group or an epoxy group on the surface as a reactive site for reacting with the reactive functional group at one end of the linker can be obtained.
- linker and silane coupling agent for the reaction as described above those having various reactive functional groups at both ends are commercially available and can be easily obtained, and desired reactive functional groups are provided at both ends. Those possessed can also be synthesized according to a known method.
- the linker can be reacted with the first reactive substance and / or the phosphor-aggregated particles according to a known protocol. Reaction conditions between the linker and the first reactive substance and / or phosphor-aggregated particles, for example, the number (density) of reactive sites of the first reactive substance and / or phosphor-aggregated particles, the linker used for the reaction and the first Fluorescence due to the first reactive substance, depending on the ratio of the number of molecules to one reactive substance and / or phosphor aggregated particles (concentration and volume of each solution), the type and amount of reaction reagent, reaction temperature, reaction time, etc. Since the modification state of the body-aggregated particles can vary, these may be adjusted appropriately.
- the reaction between the linker and the first reactive substance and the reaction between the linker and the phosphor-aggregated particles may be performed sequentially (or simultaneously if possible).
- the phosphor-aggregated particles and the linker are first bound, and then the linker having one end bound to the phosphor-aggregated particles and the first reactive substance may be bound.
- a centrifugal separation process preferably, in order to remove unreacted substances and impurities, a centrifugal separation process, a purification process using a column, and a washing process are performed as necessary. Dispersion) is recovered and used in the third step.
- Second step Step of preparing target protein-binding substance modified with second reactive substance
- the second step includes target protein-binding substance modified with second reactive substance (hereinafter “second reactive substance”). It is also a process for preparing "modified protein binding substance”.
- second reactive substance target protein-binding substance modified with second reactive substance
- linker having reactive functional groups at both ends
- the reactive functional group of the target protein-binding substance and the reactive site of the second reactive substance are used as the reactive functional group of the linker.
- this step is a step for preparing an antibody modified with biotin used in an immunostaining method (ABC method) using a conventional avidin-biotin complex. It can be set as the same embodiment.
- the linker in the second step the same linker as the linker in the first step described above can be used.
- the reaction mode between the linker and the second reactive substance (preferably biotin) and the reaction mode between the linker and the target protein-binding substance are both described above due to the common nature of the reaction between the linker and the protein. It may be the same as the reaction mode of the linker and the first reactive substance (preferably streptavidin) in the first step, and may be modified as necessary.
- a linker having a reactive functional group for example, a maleimide group for a thiol group
- a linker having a reactive functional group for example, a maleimide group for a thiol group
- a linker having a reactive functional group for example, a maleimide group for a thiol group
- a linker having a reactive functional group for example, a maleimide group for a thiol group
- the reaction between the linker and the second reactive substance (not necessary when using a product such as the kit described above) and the reaction between the linker and the target protein binding substance are sequentially (or possible). You can do it at the same time.
- the same centrifugal separation treatment, purification using a column, washing treatment, etc. are performed as necessary, and then the second reactive substance-modified protein-binding substance is recovered, and the third step Used in.
- Third step a step of reacting the first reactive substance-modified phosphor-aggregated particles with a second reactive substance-modified target protein binding substance
- the third step is the first reactive substance modification prepared in the first step
- the phosphor-aggregated particles are reacted with the second reactive substance-modified protein-binding substance prepared in the second step to finally produce fluorescent premix particles.
- the first reactive substance-modified phosphor-aggregated particles and the second reactive substance-modified target protein-binding substance are mixed in an appropriate solvent (for example, in a buffer solution such as PBS).
- the reaction can be performed for a predetermined time.
- the third step preferably, in order to remove unreacted substances and impurities, centrifugation treatment, purification treatment using a column, washing treatment, etc. are performed as necessary, and then the fluorescent premix particles are collected and appropriately treated. It can be dispersed in a solvent to form a fluorescent staining solution.
- DOJIN IgG purification kit -A / G is an adsorption separation type column and can be used as appropriate.
- a fluorescent staining liquid according to an embodiment of the present invention contains the fluorescent premix particles.
- the fluorescent staining liquid is dispersed in a suitable dispersion medium, for example, PBS (phosphate buffered saline) containing 1% BSA. As a dispersion.
- the fluorescent staining solution when used in an embodiment in which two or more types of target proteins are targeted for fluorescent labeling, it may contain two or more types of fluorescent premix particles corresponding to each target protein.
- the fluorescence wavelength peaks of two or more types of fluorescent premix particles are sufficiently separated from each other so as not to adversely affect the distinguishability of the fluorescence (bright spot) of the fluorescent premix particles that label each target protein.
- the distance is 100 nm or more.
- the fluorescent staining liquid using such a plurality of target proteins as a target may be a one-pack type in which two or more types of fluorescent premix particles are contained in the same pack (dispersion), It may be a multi-liquid type in which premix particles are contained in separate packs.
- the fluorescent staining liquid contains a pack of other reagents (for example, a staining liquid for cell morphology observation) in addition to the single-pack or multi-pack of fluorescent premix particles. But you can.
- the fluorescent staining solution can be used for various fluorescent staining methods.
- a target protein contained in the specimen is fluorescently labeled by immunostaining, Used to make stained slides.
- the fluorescence staining method includes a specimen pretreatment process (deparaffinization process, antigen activation process, cell fixation process, washing process, etc.), staining process (immunostaining process, staining process for morphology observation, fluorescent premixed particles). Treatment, washing treatment, blocking treatment, etc.) and sample post-treatment steps (encapsulation treatment, penetration treatment, dehydration treatment, etc.).
- the analysis method using the completed stained slide can be performed by an observation / photographing process, an image processing / analysis process using the photographed image, and the like.
- Such fluorescent staining methods and analysis methods include, for example, International Publication No. 2013/035688, Japanese Patent Application Laid-Open No. 2015-117980, International Publication No. 2014/136985, International Publication No. 2016/129444, International Publication No. It is possible to implement appropriately by referring to patent documents such as 163209 and based on general or known technical matters.
- the immunostaining process is a process of staining a specimen (eg, tissue section) to fluorescently label a target protein based on an immunostaining method, and a fluorescent premix contained in a fluorescent staining solution to be used. Depending on the particle embodiment, the immunostaining process embodiment also varies.
- sample tissue section
- target protein can be fluorescently labeled and used for pathological diagnosis and the like. Is mentioned.
- the phosphor-aggregated particles and the primary antibody conform to the immunostaining method (primary antibody method) in which the target protein is directly fluorescently labeled and stained.
- grains which the primary aptamer connected and the process which combines the fluorescent premix particle in the fluorescent staining liquid with the target protein in a test substance is included.
- the phosphor-aggregated particles and the secondary antibody conform to the immunostaining method (secondary antibody method) in which the target protein is indirectly fluorescently labeled and stained.
- the immunostaining method secondary antibody method
- each of the target proteins includes a treatment of directly or indirectly binding each of the corresponding fluorescent premix particles in the fluorescent staining solution.
- the fluorescent staining liquid may be a multi-liquid type composed of a set of a plurality of fluorescent staining liquids, each containing one kind of each fluorescent premix particle, or 1 containing all the fluorescent premix particles. There may be a one-component type consisting of two fluorescent staining solutions.
- the immunostaining process may be performed according to known (ideally standardized) procedures and processing conditions corresponding to the above-described embodiment or other modified embodiments.
- the specimen slide on which the specimen (tissue section) that has undergone the specimen pretreatment process is placed is used as one or more types of reagents (fluorescent staining solution, etc.) according to the embodiment of the immunostaining process. It may be immersed under suitable temperature and time conditions (eg, overnight at 4 ° C.).
- the specimen slide is first immersed in a solution containing the primary antibody, and then the obtained specimen slide is fluorescent premixed particles to which the secondary antibody or the secondary aptamer is linked. What is necessary is just to immerse in the fluorescent dyeing liquid containing this.
- the specimen slide when a multi-liquid type fluorescent staining solution is used, the specimen slide may be immersed in each fluorescent staining solution sequentially.
- the reagents necessary for the immunostaining treatment can be prepared according to a known method or can be obtained as a commercial product.
- the stained specimen may be washed with a washing solution such as PBS as necessary.
- a washing solution such as PBS as necessary.
- the specimen slide can be washed by immersing the specimen slide in PBS at room temperature for 3 to 30 minutes, and if necessary, the PBS may be replaced during the immersion.
- the staining process for cell morphology observation is a process usually performed after the immunostaining process, and a specimen (tissue) is used in order to obtain the shape of a cell or tissue and positional information of each part of the cell.
- the section is stained with a staining liquid for morphological observation.
- staining liquid for morphological observation typically include staining liquids using pigments such as hematoxylin staining liquid, eosin staining liquid, Papanicolaou (Pap) staining liquid, and the like.
- the dyeing process using such a dye may be performed according to a general procedure. For example, when hematoxylin and eosin (HE) staining is performed, for example, staining may be performed with Mayer's hematoxylin solution for 5 minutes, washed with running water at 45 ° C. for 3 minutes, and then stained with 1% eosin solution for 5 minutes.
- HE hematoxylin and eosin
- Fluorescence staining liquid using phosphor-aggregated particles can also be used as the morphological observation staining liquid.
- a biological material that is constantly expressed on the cell membrane of a specimen and is a biological material other than the target protein hereinafter also referred to as “reference biological material”.
- reference biological material a biological material that is constantly expressed on the cell membrane of a specimen and is a biological material other than the target protein
- Is fluorescently stained with phosphor-aggregated particles whereby phosphor-aggregated particles labeled with a reference biological substance on the cell membrane can be observed as bright spots. Since the region where such bright spots are accumulated is the cell membrane in which the reference biological material is expressed or its vicinity (cell membrane region), the shape of the cell or tissue and the position information of the cell can be obtained.
- Such a process of fluorescent labeling with a reference biological substance and a solution used therefor are also considered as one embodiment of a staining process and a fluorescent staining solution.
- the fluorescent premix particles may be
- the reference biological material from biological materials that are uniformly and constantly expressed on the cell membrane and that express a sufficient amount to achieve the purpose of morphological observation.
- membrane proteins such as ATPase, cadherin, cytokeratin, EpCAM (Epithelial Cell Adhesion / Activating Molecule: also called epithelial cell adhesion molecule, CD326, KSA or TROP1) can be preferred reference biological materials.
- the staining agent for fluorescently labeling the reference biological material by fluorescent staining includes phosphor-aggregated particles bonded to a substance that specifically binds to the reference biological material.
- an antibody that specifically recognizes and binds the protein as the reference biological substance as an antigen can be used.
- an anti-cadherin antibody can be used.
- the fluorescent premix particle fixing process is a process performed using a predetermined immobilization reagent after the immunostaining process and before other processes such as a staining process for morphology observation.
- the target protein labeled with the fluorescent premix particles is immobilized on the specimen (tissue section).
- a similar fixing process may be performed after the process and before other processes.
- immobilization reagent examples include a reagent capable of cross-linking the fluorescent premix particles bound to the target protein with the target protein or its surrounding proteins.
- the fluorescent premix particles are removed from the target protein even if the specimen (tissue section) is immersed in various solutions such as morphological observation staining treatment, blocking treatment, and washing treatment. It is presumed that the problem of reducing the number of fluorescent bright spots of the fluorescent premix particles can be solved by preventing dissociation or liberation from the vicinity of the target protein and observing and photographing the stained slide.
- immobilization reagent examples include a reaction site (hereinafter referred to as “first reaction site”) present on the surface of the fluorescent premix particle and a protein around a specimen (tissue section).
- first reaction site a reaction site
- second reactive site A compound (crosslinking agent) having a reactive site (hereinafter referred to as a “third reactive site” and a “fourth reactive site”, respectively) capable of reacting with each of the sites (hereinafter referred to as “second reactive sites”).
- first reaction site and the second reaction site examples include functional groups such as amino groups ( ⁇ -amino group of lysine side chain, ⁇ -amino group of N terminal), thiol group, hydroxy group, carboxy group, aromatic ring, etc. Is mentioned.
- the first reaction site and the second reaction site may be the same or different.
- examples of the third reaction site and the fourth reaction site include functional groups such as NHS (N-hydroxysuccinimide) group, maleimide group, aldehyde group, epoxy group and iodo group.
- the third reaction site and the fourth reaction site may be the same or different, and one functional group may have the functions of both the third reaction site and the fourth reaction site (for example, immobilization).
- the third reaction site and the fourth reaction site may be linked by a linker such as PEG. There may be a plurality of third reaction sites and / or fourth reaction sites in one molecule of the immobilization reagent.
- Fluorescent premix particle immobilization treatment can be performed by bringing an immobilizing reagent solution having an appropriate concentration into contact with a specimen (tissue section) for an appropriate time.
- concentration of the immobilization reagent in the immobilization reagent solution can be adjusted as appropriate, but is preferably 1 to 500 ⁇ M, for example.
- the crosslinking reaction may not proceed sufficiently if the concentration is too high.
- the intensity of the fluorescence emitted from the fluorescent premix particles is reduced, making it difficult to identify, or staining processing for morphology observation
- the reaction between the staining solution used in the above and its target is hindered, and there is a risk that the staining by these treatments will be insufficient.
- the contact time (immobilization treatment time) between the immobilized reagent solution and the specimen can be appropriately adjusted, and is, for example, about several minutes to several hours at room temperature.
- Blocking treatment is performed, for example, before or after the antigen-antibody reaction in the immunostaining treatment, and nonspecific adsorption of the fluorescent premix particles to the target protein or avidins (on the surface of the fluorescent premix particles ( Examples include treatment for suppressing adsorption of endogenous biotin present in the living body (unreacted site in the premix treatment).
- Endogenous biotin is abundant in humans in the liver, kidney, muscle, mammary gland, and digestive tract. Conditions such as cryopreservation of tissue sections and cell fixation treatment in specimen preparation processes (types of immobilization reagents used, etc.) ) May not be deactivated. Therefore, when a section derived from the tissue such as a mammary gland is to be stained, it is preferable to perform a blocking treatment for biotin-avidin reaction.
- the primary antibody or the primary antibody is treated before the treatment for binding the primary antibody or primary aptamer to the target protein (primary antibody treatment).
- a reference biological substance is used as a staining treatment for morphology observation.
- Antigen antibody for suppressing non-specific adsorption of a primary antibody (primary aptamer) or secondary antibody (secondary aptamer) to a protein other than a predetermined target antigen may be carried out.
- the blocking treatment may be performed using a known blocking agent.
- a BSA-containing PBS buffer or the like can be used for blocking treatment for antigen-antibody reaction, and avidin solution (fluorescent premixed particles bound to endogenous biotin is used for blocking treatment for avidin-biotin reaction. Of 4 reaction sites such as avidin, etc., which has unreacted sites, and biotin solution (avidin, etc., which the fluorescent premix particles have).
- a blocking reagent such as the “endogenous avidin / biotin blocking kit” manufactured by Nichirei Biosciences
- the target protein which is the target of the fluorescent staining, is preferably at least one biological substance contained in the specimen, and is also a target of immunostaining that is mainly performed for the quantification or detection of the protein in pathological diagnosis.
- a protein antigen
- proteins proteins (so-called biomarkers) related to cancer pathological diagnosis are preferable.
- PD-L1 Programmed cell death1 ligand 1
- CTLA4 cytotoxic T lymphocyte antigen-4
- CD8 CD30, CD48, CD59
- EGFR HER1 (Epidermal Growth Factor Receptor: epithelium) Growth factor receptor
- HER2 Human Epidermal Growth Factor Receptor
- HER3, HER4, VEGFR Vasular Endothelial Growth Factor Receptor
- IGFR Insulin-like Growth Factor Receptor
- HGFR hepatocyte growth factor receptor
- growth factor receptor receptor
- important inhibitory immune checkpoint molecules on the T cell surface Receptors of the immune system such as PD-1 (Programmed cell death 1), which is the PD-L1 receptor
- PD-1 Programmed cell death 1 receptor
- 0.6 mL of the obtained organoalkoxysilane compound was mixed with 48 mL of 99% ethanol, 0.6 mL of tetraethoxysilane (TEOS), 2 mL of ultrapure water, and 2.0 mL of 28% by mass of ammonia water at 5 ° C. for 3 hours. .
- TEOS tetraethoxysilane
- the mixed solution prepared in the above step was centrifuged at 10,000 G for 20 minutes, and the supernatant was removed. Ethanol was added to the precipitate to disperse the precipitate, and washing was performed again by centrifugation. Further, the same washing was repeated twice to obtain Texas red integrated silica particles (excitation wavelength: 590 nm, emission wavelength: 620 nm). When 1000 particles of the obtained particles were observed with an SEM, the particle diameter was measured, and the average particle diameter was calculated.
- the resulting dispersion was washed with pure water to remove excess impurities such as resin materials and fluorescent dyes. Specifically, it was centrifuged at 20000 G for 15 minutes with a centrifuge (Microcooled Centrifuge 3740 manufactured by Kubota Corporation), and after removing the supernatant, it was redispersed by adding ultrapure water and irradiating with ultrasonic waves. Centrifugation, supernatant removal, and washing by redispersion in ultrapure water were repeated 5 times.
- pyromethene 556-integrated melamine resin particles (excitation wavelength 490 nm, emission wavelength 520 nm) were produced. It was 155 nm when the SEM observation was performed about 1000 of the obtained particle
- the obtained reaction solution was centrifuged at 10,000 G for 20 minutes, and the supernatant was removed. PBS containing 2 mM EDTA was added thereto, the precipitate was dispersed, and centrifuged again under the same conditions. By performing washing by the same procedure three times, maleimide group-introduced Texas Red integrated silica particles were obtained.
- the obtained solution was desalted by passing through a gel filtration column (Zaba Spin Desaling Columns: manufactured by Funakoshi Co., Ltd.) to obtain a mercapto group-introduced streptavidin capable of binding to maleimide group-introduced Texas red integrated silica particles.
- a gel filtration column Zaba Spin Desaling Columns: manufactured by Funakoshi Co., Ltd.
- the total amount of the obtained mercapto group-introduced streptavidin (0.04 mg) and maleimide group-introduced Texas red integrated silica particles so that the concentration of the silica particles is 0.67 nM 740 ⁇ L of the liquid mixed with was prepared and reacted at room temperature for 1 hour. Thereafter, 10 mM mercaptoethanol was added to stop the reaction.
- the obtained streptavidin-modified Texas Red integrated silica particles were found to have a density of 0.0311 particles / nm 2 on the surface of the Texas Red integrated silica particles. Are estimated to be connected.
- Amino group-introduced Texas Red-integrated melamine resin particles were adjusted to a concentration of 3 nM using PBS containing 2 mM EDTA, and SM (PEG) 12 was added to the resulting liquid as a linker to a final concentration of 10 mM. Mix and react for 1 hour at room temperature with stirring.
- the obtained reaction solution was centrifuged at 10,000 G for 20 minutes, the supernatant was removed, PBS containing 2 mM of EDTA was added to disperse the precipitate, and centrifugation was performed again under the same conditions. By performing washing by the same procedure three times, maleimide group-introduced Texas Red integrated melamine resin particles were obtained.
- the hydroxylamine treatment produced a deprotected (free) mercapto group from the protected mercapto group, thereby completing the treatment for introducing the mercapto group into streptavidin.
- the obtained solution was desalted by passing through a gel filtration column (Zaba Spin Desaling Columns) to obtain streptavidin into which a mercapto group was introduced.
- the total amount (0.04 mg) of the mercapto group-introduced streptavidin prepared as described above was mixed with maleimide group-introduced Texas Red-integrated melamine resin particles and reacted for 1 hour. Thereafter, 10 mM mercaptoethanol was added to the reaction solution to stop the reaction.
- linker reagent “maleimide-PEG 2 -biotin” (manufactured by Thermo Scientific, product number 21901) was adjusted to 0.4 mM using DMSO. 8.5 ⁇ L of this linker reagent solution was added to the primary antibody solution, mixed, and reacted at 37 ° C. for 30 minutes to bind biotin to the anti-HER2 antibody via the PEG chain. The obtained reaction solution was passed through a desalting column to purify the biotin-modified anti-HER2 antibody.
- biotin-modified primary antibody biotin-modified anti-HER2 antibody
- the absorbance at a wavelength of 300 nm is measured using a spectrophotometer (Hitachi “F-7000”) to obtain a protein in the solution (biotin-modified primary antibody).
- Antibody) concentration was calculated.
- a biotin-modified primary antibody solution was obtained by adjusting the concentration of the biotin-modified primary antibody to 6 ⁇ g / mL using a 50 mM Tris solution.
- an anti-rabbit IgG antibody in which a disulfide bond was reduced to generate a mercapto group that is, a reduced anti-rabbit IgG antibody was produced. Thereafter, the reaction solution was passed through a desalting column “Zeba Desert Spin Columns” (manufactured by Thermo Scientific, Cat. # 89882) to purify the reduced anti-rabbit IgG antibody.
- a linker reagent solution was obtained by adjusting the linker reagent “maleimide-PEG 2 -biotin” (manufactured by Thermo Scientific, product number 21901) to be 0.4 mM using DMSO. 8.5 ⁇ L of this linker reagent solution was added to the secondary antibody solution, mixed, and reacted at 37 ° C. for 30 minutes to bind biotin to the anti-rabbit IgG antibody via the PEG chain. The resulting solution was passed through a desalting column to purify the biotin-modified anti-rabbit IgG antibody.
- biotin-modified secondary antibody biotin-modified anti-rabbit IgG antibody
- the absorbance at a wavelength of 300 nm is measured using a spectrophotometer (Hitachi “F-7000”) to obtain a protein in the solution (biotin-modified).
- the concentration of the secondary antibody was calculated.
- a biotin-modified secondary antibody solution was obtained by adjusting the concentration of the biotin-modified secondary antibody to 6 ⁇ g / mL using a 50 mM Tris solution.
- biotin-modified HER2 antigen recognition RNA aptamer was adjusted with a 50 mM Tris solution so that the concentration thereof was 6 ⁇ g / mL to obtain a biotin-modified HER2 antigen recognition RNA aptamer solution.
- the obtained biotin-modified rabbit IgG recognition RNA aptamer was adjusted with a 50 mM Tris solution so that the concentration thereof was 6 ⁇ g / mL, thereby obtaining a biotin-modified rabbit IgG recognition RNA aptamer solution.
- the DNP-modified anti-mouse IgG antibody solution was obtained by adjusting the prepared DNP-modified anti-mouse IgG antibody with a 50 mM Tris solution so that the concentration thereof was 6 ⁇ g / mL.
- the FITC-modified anti-rabbit IgG antibody solution was obtained by adjusting the prepared FITC-modified anti-rabbit IgG antibody so as to have a concentration of 6 ⁇ g / mL using a 50 mM Tris solution.
- the sample pretreatment step deparaffinization treatment, activation treatment
- staining step primary antibody treatment, secondary antibody treatment, fluorescent labeling treatment
- a staining slide based on the immunostaining method was prepared by performing a phosphor-aggregated particle fixing process and a morphology observation staining process) and a specimen post-processing step (encapsulation process) (see FIG. 4). Thereafter, using the prepared staining slide, observation and imaging were performed according to the procedure shown in (4) below.
- Specimen pretreatment step (1-1) Deparaffinization Tissue array slide (CB-A712) (HER2) manufactured by Cosmo Bio, whose FISH score was calculated in advance using Pathvision HER-2 DNA probe kit (Abbott) Positive staining control specimens) were used.
- the tissue array slide was deparaffinized by the following procedures (i) to (iii).
- Phosphor-aggregated particle immobilization treatment was performed by immersing the tissue array slide subjected to the fluorescence labeling treatment (2-1A) in 4% neutral paraformaldehyde aqueous solution for 10 minutes. It was.
- a fluorescence microscope (OLYMPUS "BX-53") is used to obtain a predetermined excitation light (a wavelength corresponding to the excitation wavelength of Texas Red used as the fluorescent dye). Excitation light) was irradiated to observe the emitted fluorescence, and a fluorescent dyed image was taken with a digital camera for microscope (“DP73” manufactured by Olympus). The excitation light was set to 575 to 600 nm using an optical filter for excitation light. The range of the wavelength (nm) of the fluorescence to be observed was set to 612 to 692 nm by passing through the fluorescence optical filter.
- the conditions of the excitation wavelength at the time of microscopic observation and image photographing were such that the irradiation energy in the vicinity of the center of the field of view was 900 W / cm 2 with excitation at 580 nm.
- the exposure time at the time of image capturing was arbitrarily set (for example, set to 4000 ⁇ sec) so that the luminance of the image was not saturated.
- image processing software ImageJ open source
- a stained image by hematoxylin staining was photographed by observation and image photographing in a bright field of a fluorescence microscope.
- the number of bright spots per cell was counted by superimposing the image of fluorescent staining and the image of hematoxylin staining by image processing.
- the number of bright spots for 1000 cells was counted, and the average value obtained was taken as the number of bright spots in each tissue section.
- the photographed fluorescent stained image is shown in FIG.
- the average luminance (luminance per pixel) of the obtained fluorescent dyed image was 141.
- Example 1 Preparation of fluorescent staining solution (No. 1) containing anti-HER2 antibody-linked Texas Red-integrated silica particles and photographing fluorescent staining image using the same. 0.02 nM streptavidin obtained in Preparation Example 4 25 ⁇ L of the modified Texas Red-integrated silica particle dispersion (reaction solution 1) and 25 ⁇ L of the biotin-modified anti-HER2 antibody (primary antibody) solution (reaction solution 2) having a concentration of 6 ⁇ g / mL obtained in Preparation Example 8 were mixed. By reacting at room temperature for 1 hour, a fluorescent staining solution (No. 1) containing anti-HER2 antibody (primary antibody) -linked Texas Red integrated silica particles (fluorescent premix particles) was prepared.
- the obtained fluorescent premix particles are estimated to have an anti-HER2 antibody linked to the surface of Texas Red integrated silica particles at a density of 0.012 particles / nm 2 .
- the concentration of the fluorescent staining solution (No. 1) containing fluorescent premix particles, which are anti-HER2 antibody (primary antibody) -linked Texas Red integrated silica particles is adjusted to 0.02 nM using a 50 mM Tris solution. did. This solution was dropped onto a tissue section on a tissue array slide and allowed to react overnight at 4 ° C.
- Example 2 Preparation of fluorescent staining solution (No. 2) containing anti-HER2 antibody-linked Texas Red-integrated silica particles and photographing of fluorescent staining image using the same Strain of 0.02 nM obtained in Preparation Example 4
- a fluorescent staining solution (No. 2) containing anti-HER2 antibody (primary antibody) -linked Texas Red integrated silica particles (fluorescent premix particles) was prepared.
- the obtained fluorescent premix particles are estimated to have an anti-HER2 antibody linked to the surface of Texas Red integrated silica particles at a density of 0.030 particles / nm 2 .
- a staining slide was prepared and a fluorescent staining image was taken in the same manner as in Example 1 except that the obtained fluorescent staining solution (No. 2) was used.
- the average luminance of the obtained fluorescent stained image was 688.
- Example 3 Preparation of fluorescent staining solution (No. 3) containing anti-HER2 antibody-linked Texas Red-integrated silica particles and photographing of fluorescent staining image using the same. Strept at 0.02 nM concentration obtained in Preparation Example 4 By mixing 95 ⁇ L of the avidin-modified Texas Red-integrated silica particle dispersion and 5 ⁇ L of the biotin-modified anti-HER2 antibody (primary antibody) solution having a concentration of 6 ⁇ g / mL obtained in Preparation Example 8, and reacting at room temperature for 1 hour, A fluorescent staining solution (No. 3) containing anti-HER2 antibody (primary antibody) -linked Texas Red integrated silica particles (fluorescent premix particles) was prepared.
- the obtained fluorescent premix particles are estimated to have an anti-HER2 antibody linked to the surface of Texas Red-integrated silica particles at a density of 0.003 particles / nm 2 .
- Example 1 Except for using the obtained fluorescent staining solution (No. 3), a staining slide was prepared and a fluorescent staining image was taken in the same manner as in Example 1. The average luminance of the obtained fluorescent stained image was 630.
- Example 4 Preparation of fluorescent staining solution (No. 4) containing anti-HER2 antibody-linked Texas Red-integrated silica particles and photographing of fluorescent staining image using the same Strain of 0.02 nM obtained in Preparation Example 4
- a fluorescent staining solution (No. 4) containing anti-HER2 antibody (primary antibody) -linked Texas Red integrated silica particles (fluorescent premix particles) was prepared.
- the obtained fluorescent premix particles are estimated to have an anti-HER2 antibody linked to the surface of Texas Red integrated silica particles at a density of 0.001 particles / nm 2 .
- a staining slide was prepared and a fluorescent staining image was taken in the same manner as in Example 1 except that the obtained fluorescent staining solution (No. 4) was used.
- the average luminance of the obtained fluorescent stained image was 472.
- Example 5 Preparation of fluorescent staining solution (No. 5) containing purified anti-HER2 antibody-linked Texas Red-integrated silica particles and photographing fluorescent staining image using the same First, in the same procedure as in Example 1, A fluorescent staining solution (No. 1) was prepared.
- the fluorescent staining liquid (No. 5) was prepared by purifying the fluorescent staining liquid (No. 1) by the following procedure.
- protein A (“21184” manufactured by Thermo Fisher Scientific Co., Ltd.) was further reacted to bind the amino group of protein A to the active esterified carboxyl group by dehydration reaction.
- the protein A-binding resin thus obtained was packed in a column (1 mL syringe) to produce a protein A-binding resin column.
- Step B Purification of Anti-HER2 Antibody-Linked Fluorescent Premix Particles Protein A-binding resin prepared in Step A by flowing 5 mL of buffer A (0.1 M glycine + 1.2 M sodium tartrate, pH 9.0) three times The column was equilibrated.
- buffer A 0.1 M glycine + 1.2 M sodium tartrate, pH 9.0
- 1.5 mL of the fluorescent staining solution (No. 1) is diluted with 1.5 mL of buffer A and added to an equilibrated protein A binding resin column, and anti-HER2 antibody (IgG) in the fluorescent premix particles is added. Binding to protein A in a protein A binding resin column. After washing the column with 10 mL of buffer A, 3 mL of 0.1 M glycine-HCl (pH 2.8) was flowed to desorb the fluorescent premix particles to obtain a fluorescent staining solution (No. 5).
- a staining slide was prepared and a fluorescent staining image was taken in the same manner as in Example 1 except that the obtained fluorescent staining solution (No. 5) was used.
- the obtained fluorescent staining solution No. 5
- the obtained fluorescent staining image almost no bright spots derived from the aggregated fluorescent premix particles were found, and the average luminance was maintained at a high value of 540.
- Example 6 Preparation of fluorescent staining solution (No. 6) containing primary aptamer-linked Texas Red-integrated silica particles and photographing of fluorescent staining image using the same Strain of 0.02 nM obtained in Preparation Example 4 Mixing 25 ⁇ L of avidin-modified Texas Red-integrated silica particle dispersion and 25 ⁇ L of a 6 ⁇ g / mL biotin-modified HER2 antigen recognition RNA aptamer (primary aptamer) solution obtained in Preparation Example 10 and reacting at room temperature for 1 hour Thus, a fluorescent staining solution (No. 6) containing HER2 antigen-recognizing RNA aptamer (primary aptamer) -linked Texas Red-integrated silica particles (fluorescent premix particles) was prepared.
- a staining slide was prepared and a fluorescent staining image was taken in the same manner as in Example 1 except that the obtained fluorescent staining solution (No. 6) was used.
- the average luminance of the obtained fluorescent dyed image was 1701. *
- Example 7 Preparation of fluorescent staining solution (No. 7) containing secondary aptamer-linked Texas Red-integrated melamine resin particles and photographing of fluorescent staining image using the same. Concentration of 0.02 nM obtained in Preparation Example 5 Streptavidin-modified Texas Red-integrated melamine resin particle dispersion 25 ⁇ L and biotin-modified rabbit IgG recognition RNA aptamer (secondary aptamer) solution 25 ⁇ L obtained in Preparation Example 11 were mixed and reacted at room temperature for 1 hour. By doing so, a fluorescent staining solution (No. 7) containing a rabbit IgG-recognizing RNA aptamer (secondary aptamer) -linked Texas Red-integrated melamine resin particle (fluorescent premix particle) was prepared.
- Comparative Example 1 except that (2-1A) was changed to the method shown in (2-1C) below, a stained slide was prepared and a fluorescent stained image was taken in the same manner as Comparative Example 1. The average luminance of the obtained fluorescent dyed image was 1920.
- Example 8 Preparation of fluorescent staining solution (No. 8) containing two types of fluorescent premix particles and photographing of fluorescent staining image using the same [0209] Anti-DNP antibody having a concentration of 0.02 nM obtained in Preparation Example 6 By mixing 10 ⁇ L of the modified pyromethene 556-integrated melamine resin particle dispersion with 90 ⁇ L of the DNP-modified anti-mouse IgG antibody (secondary antibody) solution having a concentration of 6 ⁇ g / mL obtained in Preparation Example 12, and reacting at room temperature for 1 hour. As a first fluorescent premix particle, a fluorescent staining solution (No. 8A) containing anti-mouse IgG antibody (secondary antibody) -linked pyromethene 556-integrated melamine resin particles was prepared.
- the resulting fluorescent staining liquids (No. 8A) and (No. 8B) are mixed to contain an equal amount of the first and second fluorescent premix particles. No. 8) was prepared.
- USBiomax Lung Tissue Array Slide “LC241b” Tewo sections of tumor tissue and normal tissue derived from 6 patients, and one section of pheochromocytoma (tissue marker), totaling 25 sections Purchased a slide glass.
- the sample pretreatment step deparaffinization treatment, activation treatment
- staining step double immunostaining treatment, phosphor
- the staining slide based on the immunostaining method was prepared by performing the integrated particle fixing process and the morphological observation staining process) and the specimen post-processing process (encapsulation process). Thereafter, using the prepared staining slide, observation and imaging were performed according to the procedure shown in (4) below.
- Sample pretreatment step (1-1) Deparaffinization treatment (i) The tissue array slide was immersed in a container containing xylene for 15 minutes. The xylene was changed twice during the process.
- the one-component fluorescent staining solution (No. 8) is diluted with PBS containing 1% BSA so that the concentration of each premix particle is 0.1 nM, and the diluted solution is obtained in (i). The tissue array slide was left overnight.
- Fluorescent premix particles target protein-binding substance-linked fluorescent substance integrated particles
- 10 Fluorescent substance integrated particle
- 15 Linker 20: First reactive substance 21: Streptavidin 30: Second reactive substance 31: Biotin 40: Target protein binding substance 41: Primary antibody 42: Secondary antibody 100: Tissue Section 150: Protein of interest
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Abstract
Description
目的タンパク質に前記蛍光染色液中の蛍光プレミックス粒子を結合させる処理を含む、蛍光染色法。
目的タンパク質に前記1次抗体を結合させる処理、および
目的タンパク質に結合させた1次抗体に前記蛍光染色液中の蛍光プレミックス粒子を結合させる処理を含む、蛍光染色法。
2種以上の目的タンパク質のそれぞれに、前記蛍光染色液中の対応する蛍光プレミックス粒子のそれぞれを、直接的または間接的に結合させる処理を含む、蛍光染色法。
本発明の一実施形態に係る蛍光プレミックス粒子は、第1反応性物質で修飾された蛍光体集積粒子と、第2反応性物質で修飾された、抗体およびアプタマーからなる群より選ばれる少なくとも1種の目的タンパク質結合性物質とが、第1反応性物質と第2反応性物質との相互作用により結合している複合体である。
プレミックスすることにより、第1反応性物質と第2反応性物質との結合効率が優れる。
また、第1反応性物質としてストレプトアビジンを用い、第2反応性物質として、ビオチンを用いる場合、蛍光体集積粒子表面のストレプトアビジン1個につきそれぞれ最大4個のビオチン標識目的タンパク質結合性物質を結合させることができるため(ストレプトアビジン1分子に対して最大ビオチン4分子が結合するため)、蛍光体集積粒子には極めて多くの目的タンパク質結合性物質を担持させることができ、目的タンパク質や1次抗体への結合効率が著しく高くなる。
(i)蛍光体集積粒子の表面に導入した第1反応性物質についての、単位面積あたりの数を測定する;
(ii)その第1反応性物質1つに対して、最大いくつの第2反応性物質(で修飾された目的タンパク質結合性物質)が結合するか、係数を決定する(例えば、第1反応性物質がアビジン等である場合は4であり、第1反応性物質が抗ハプテン抗体である場合は1である);
(iii)前記(i)の単位面積あたりの数に、前記(ii)の係数を乗じた値を、蛍光体集積粒子の表面の単位面積あたりに連結し得る目的タンパク質結合性物質の数の最大値とみなす;
(iv)反応のために添加した第2反応性物質で修飾された目的タンパク質結合性物質の量が、(iii)の最大値よりも多いときは、その最大値を目的タンパク質結合性物質の単位表面積あたりの数とみなし、(iii)の最大値よりも少ないときは、第2反応性物質で修飾された目的タンパク質結合性物質の添加総数を蛍光体集積粒子の総表面積で除した値を、目的タンパク質結合性物質の単位表面積あたりの数とみなす。
前記第1反応性物質および第2反応性物質は、相互作用により互いに特異的に結合する物質同士の組み合わせであって、いずれも、目的タンパク質結合性物質とそれが結合する目的タンパク質(または、2次もしくは3次以上の高次目的タンパク質結合性物質)との特異的な結合と交差して反応することのない物質から選択される。第1反応性物質および第2反応性物質としては、いずれも限定されないが、例えば、公知の染色法において目的タンパク質(抗原等)と標識物質(蛍光体等)とを間接的に結合させる際に利用されているものの中から選択することができる。
前記目的タンパク質結合性物質は、抗体およびアプタマーからなる群より選ばれる少なくとも1種であり、目的タンパク質と直接的にまたは間接的に結合できる物質である。
該目的タンパク質結合性物質は2種以上であってもよいが、通常、1種である。
前記抗体は、免疫染色法において目的タンパク質と直接的にまたは間接的に結合できる抗体であれば特に限定されない。該抗体は、目的タンパク質(抗原)に特異的に結合する1次抗体であってもよいし、その1次抗体に特異的に結合する2次抗体、またはそれ以上の高次抗体であってもよいが、1次抗体または2次抗体であることが好ましい。
前記アプタマーとしては、抗体を用いる免疫染色法(直接法または間接法)に準じる方法によって目的タンパク質を特異的に標識できるアプタマーであれば特に限定されない。該アプタマーは、目的タンパク質に特異的に結合する1次アプタマーであってもよいし、目的タンパク質に結合した1次抗体または1次アプタマーに特異的に結合する2次アプタマー、またはそれ以上の高次アプタマーであってもよいが、1次アプタマーまたは2次アプタマーであることが好ましい。
前記蛍光体集積粒子(第1反応性物質で修飾される前の粒子)としては、特に制限されないが、有機物または無機物でできた母体となる粒子の内部または表面に、蛍光体(例えば蛍光色素)を複数個固定して集積した構造を有するナノサイズの(直径が1μm以下の)粒子であることが好ましく、一粒子で十分な輝度の蛍光を発することができる粒子であることが好ましい。
有機蛍光色素集積粒子は、粒子の母体となる物質の内部または表面に有機蛍光色素を複数個集積した、ナノサイズの蛍光粒子であることが好ましい。
無機蛍光体集積粒子は、粒子の母体となる物質の内部または表面に半導体ナノ粒子を複数個集積した、ナノサイズの蛍光粒子であることが好ましい。
蛍光体集積粒子の平均粒子径は、好ましくは30~300nm、より好ましくは40~160nmである。一般的に、粒子径が小さくなるほど比表面積が大きくなり、検体との結合力が高まるが、平均粒子径が30nmを下回ると、蛍光体集積粒子に起因して蛍光観察で観察されるべき輝点が全く観察されないか、または観察されにくい場合がある。逆に、蛍光体集積粒子の平均粒子径が300nmを上回ると、蛍光観察において観察される輝点が多くなりすぎる等、輝点同士が分離されずに正確に輝点をカウントすることが困難となる場合がある。
前記蛍光プレミックス粒子は、第1反応性物質で修飾された蛍光体集積粒子と、第2反応性物質で修飾された目的タンパク質結合性物質とが、第1反応性物質と第2反応性物質との相互作用により連結している構造を有していればよく、その作製方法は特に限定されるものではない。
前記第1工程は、第1反応性物質で修飾された蛍光体集積粒子(以下「第1反応性物質修飾蛍光体集積粒子」ともいう。)を調製するための工程である。この工程は、従来のアビジン-ビオチン複合体を利用した免疫染色法(ABC法)において用いられる、ストレプトアビジン等(本発明における第1反応性物質)で修飾された蛍光体集積粒子を調製するための工程と同様の実施形態とすることができる。
前記第2工程は、第2反応性物質で修飾された目的タンパク質結合性物質(以下「第2反応性物質修飾目的タンパク質結合性物質」ともいう。)を調製するための工程である。典型的には、両末端に反応性官能基を有するリンカーを用いて、リンカーのそれぞれの反応性官能基を、目的タンパク質結合性物質が有する反応性部位および第2反応性物質が有する反応性部位と反応させて共有結合を形成することにより、目的タンパク質結合性物質と第2反応性物質とをリンカーを介して連結する。例えば、第2反応性物質としてビオチンを用いる場合、この工程は、従来のアビジン-ビオチン複合体を利用した免疫染色法(ABC法)において用いられる、ビオチンで修飾された抗体を調製するための工程と同様の実施形態とすることができる。
前記第3工程は、第1工程において調製された第1反応性物質修飾蛍光体集積粒子と、第2工程において調製された第2反応性物質修飾目的タンパク質結合性物質とを反応させて、最終的に蛍光プレミックス粒子を作製するための工程である。
本発明の一実施形態に係る蛍光染色液は、前記蛍光プレミックス粒子を含有する。蛍光染色液は一般的に、蛍光プレミックス粒子を調製し、回収した後、その蛍光プレミックス粒子を適切な分散媒、例えば1%BSAを含有するPBS(リン酸緩衝生理食塩水)に分散させた分散液として調製することができる。
前記蛍光染色液は、様々な蛍光染色法に利用することができるが、典型的には、検体である組織切片から作製した組織スライドにおいて、検体に含まれる目的タンパク質を免疫染色により蛍光標識した、染色スライドを作製するために利用される。
(1)免疫染色処理
免疫染色処理は、免疫染色法に基づき、目的タンパク質を蛍光標識するために検体(例:組織切片)を染色する処理であり、使用する蛍光染色液に含まれる蛍光プレミックス粒子の実施形態に応じて、免疫染色処理の実施形態も変化する。
細胞形態観察用染色処理は、通常、免疫染色処理の後に行われる処理であって、細胞ないし組織の形状や細胞の各部の位置情報を得るために検体(組織切片)を形態観察用染色液で染色する処理である。
蛍光プレミックス粒子固定処理は、免疫染色処理の後、形態観察用染色処理等の他の処理の前に、所定の固定化試薬を用いて行われる処理であって、蛍光プレミックス粒子で標識された目的タンパク質を検体(組織切片)上に固定化する処理である。なお、細胞形態観察用染色処理として、参照生体物質を対象とする蛍光染色処理を行う場合は、その処理の後、他の処理の前に、同様の固定処理を行ってもよい。
前記蛍光プレミックス粒子用の固定化試薬としては、例えば、蛍光プレミックス粒子表面に存在する反応部位(以下「第1反応部位」と呼ぶ。)および検体(組織切片)の周辺のタンパク質が有する反応部位(以下「第2反応部位」と呼ぶ。)のそれぞれと反応しうる反応部位(それぞれ、以下「第3反応部位」および「第4反応部位」と呼ぶ。)を有する化合物(架橋剤)が挙げられる。
ブロッキング処理は、例えば、免疫染色処理の抗原抗体反応の前後に行われ、蛍光プレミックス粒子の目的タンパク質への非特異的吸着や、蛍光プレミックス粒子の表面にあるアビジン類(プレミックス処理における未反応部位)の生体内に存在する内因性ビオチンへの吸着を抑制するための処理が挙げられる。
前記蛍光染色の対象である、目的タンパク質は、検体に含まれる少なくとも1種の生体物質であることが好ましく、さらに主に病理診断において、タンパク質の定量ないし検出のために行われる免疫染色の対象であるタンパク質(抗原)であることが最も好ましい。典型的には、例えば、がんの病理診断に関係するタンパク質(いわゆるバイオマーカー)が好ましい。具体的には、PD-L1(Programmed cell death1 ligand 1)、CTLA4(細胞傷害性Tリンパ球抗原-4)、CD8、CD30、CD48、CD59、あるいは、EGFR(HER1)(Epidermal Growth Factor Receptor:上皮増殖因子受容体)、HER2(Human Epidermal Growth Factor Receptor:ヒト上皮増殖因子受容体)、HER3、HER4、VEGFR(Vasular Endothelial Growth Factor Receptor:血管内皮細胞増殖因子受容体)、IGFR(Insulin-like Growth Factor Receptor:インスリン様増殖因子受容体)、HGFR(Hepatocyte Growth Factor Receptor:肝細胞増殖因子受容体)といった増殖因子の受容体(レセプター)や、T細胞表面上にある重要な抑制性の免疫チェックポイント分子であって前記PD-L1の受容体であるPD-1(Programmed cell death 1)などの免疫系の受容体であるタンパク質が例示できる
下記の表に、作製例、実施例および比較例の概要を示す。
赤色の有機蛍光色素である「テキサスレッド-X」(Sulforhodamine 101-X、シグマアルドリッチ社製)3.4mgと3-アミノプロピルトリメトキシシラン(信越シリコーン社製、KBM903)3μLとを、N,N-ジメチルホルムアミド(DMF)の中で混合し、オルガノアルコキシシラン化合物を得た。
赤色の有機蛍光色素である「テキサスレッド」(Sulforhodamine 101、シグマアルドリッチ社製)5.25mgを純水22.5mLに溶解した後、ホットスターラーで溶液の温度を70℃に維持しながら20分間撹拌した。撹拌後の溶液に、メラミン樹脂原料「ニカラックMX-035」(日本カーバイド工業社製)0.21gを加え、さらに同一条件で5分間加熱撹拌した。
緑色の有機蛍光色素である「ピロメテン556」(Pyrromethene556)14.4mgを水22mLに加えて溶解させた。その後、この溶液に乳化重合用乳化剤のエマルゲン(登録商標)430(ポリオキシエチレンオレイルエーテル、花王社製)の5%水溶液を2mL加えた。この溶液をホットスターラー上で撹拌しながら70℃まで昇温させた後、メラミン樹脂原料「ニカラックMX-035」(日本カーバイド工業社製)を0.65g加えた。
作製例1で得られたテキサスレッド集積シリカ粒子を、2mMのEDTA(エチレンジアミン四酢酸)を含有するPBSを用いて3nMの濃度に調整し、得られた液体に、リンカーとしてSM(PEG)12(スクシンイミジル-[(N-マレイミドプロピオンアミド)-ドデカンエチレングリコール]エステル、サーモサイエンティフィック社製)を最終濃度が10mMとなるように添加、混合し、5℃で1時間反応させた。
作製例2で得られたテキサスレッド集積メラミン樹脂粒子0.1mgをエタノール1.5mL中に分散させ、アミノプロピルトリメトキシシラン「LS-3150」(信越化学工業社製)2μLを加えて8時間撹拌しながら室温で反応させて、粒子表面にアミノ基を導入した。
作製例2で得られたテキサスレッド集積メラミン樹脂粒子の代わりに、作製例3で得られたピロメテン556集積メラミン樹脂粒子を用い、ストレプトアビジンの代わりに抗DNP(ジニトロフェニル)抗体を用いたこと以外、作製例5と同様の手順に従って、抗DNP抗体修飾ピロメテン556集積メラミン樹脂粒子の分散液を調製した。
ストレプトアビジンの代わりに抗FITC抗体を用いたこと以外、作製例4と同様の手順に従って、抗FITC抗体修飾テキサスレッド集積シリカ粒子の分散液を調製した。
目的タンパク質HER2に対する1次抗体、すなわち抗HER2抗体として、ウサギモノクローナル抗体であるAnti-Erb 2 antibody[EP1045Y](abcam社製)を用いた。この抗HER2抗体を50mMのTris溶液に溶解して1次抗体溶液を調製した。
前記抗HER2抗体(ウサギモノクローナル抗体)に対する2次抗体として、抗ウサギIgG抗体「LO-RG1」(GeneTex社製、cord GTX40383)を用いた。この抗ウサギIgG抗体50μgを50mMのTris溶液に溶解し、この溶液に還元剤であるDTT(ジチオトレイトール)を最終濃度が3mMとなるように添加、混合し、37℃で30分間反応させることにより、ジスルフィド結合を還元してメルカプト基を生成させた抗ウサギIgG抗体、すなわち還元型抗ウサギIgG抗体を作製した。その後、反応溶液を脱塩カラム「Zeba Desalt Spin Columns」(サーモサイエンティフィック社製、Cat.#89882)に通して、還元型抗ウサギIgG抗体を精製した。
5’末端がビオチン修飾された、HER2抗原認識RNAアプタマー(RNA 5-AGCCGCGAGGGGAGGGAUAGGGUAGGGCGCGGCU-3、NUCLEIC ACID THERAPEUTICS, Volume 21, Number 3, 2011, 173)を、北海道システムサイエンス社に合成依頼して入手した。
5’末端がビオチン修飾された、ウサギIgG認識RNAアプタマー(RNA 5-GGGAGAAUUCCGACCAGAAG-UUCGAUACGCCGUGGGGUGACGUUGGCUAC-CCUUUCCUCUCUCCUCCUUCUUC-3、Analytical Biochemistry, 375, 2008, 217-222)を、北海道システムサイエンス社に合成依頼して入手した。
NHS―DNP試薬(BP-22397、BroadPharm社製)を用いて、ゴート由来抗マウスIgG抗体「ab182017」(abcam社製)のアミノ基にNHS―DNP基を反応させて、DNP修飾抗マウスIgG抗体を作製した。
NHS―FITC試薬(BP-22401、BroadPharm社製)を用いて、ラット由来抗ウサギIgG抗体「LO-RG1」(GeneTex社製、cord GTX40383)のアミノ基にNHS―FITC基を反応させて、FITC修飾抗ウサギIgG抗体を作製した。
1次抗体として作製例8で用いた抗HER2抗体(作成例8において、ビオチンを修飾する前の抗HER2抗体)を用い、2次抗体として作製例9で得られたビオチン修飾抗ウサギIgG抗体を用い、蛍光染色液として作製例4で得られたストレプトアビジン修飾テキサスレッド集積シリカ粒子を用いた。下記(1)、(2A)および(3)に示すような手順で、標本前処理工程(脱パラフィン処理、賦活化処理)、染色工程(1次抗体処理、2次抗体処理、蛍光標識処理、蛍光体集積粒子固定処理および形態観察用染色処理)、標本後処理工程(封入処理)を行うことにより、免疫染色法に基づく染色スライドを作製した(図4参照)。その後、作製された染色スライドを用いて、下記(4)に示す手順で観察および撮像を行った。
(1-1)脱パラフィン処理
予めパスビジョンHER-2 DNAプローブキット(アボット)を用いてFISHスコアを算出したコスモバイオ社製の組織アレイスライド(CB-A712)(HER2陽性染色対照標本)を用いた。該組織アレイスライドに対し、以下の(i)~(iii)の手順で脱パラフィン処理を行った。
脱パラフィン処理した組織アレイスライドを、以下の(i)~(iv)の手順で賦活化処理した。
(2-1A)免疫染色処理
賦活化処理(1-2)を行った組織アレイスライドに対して、以下の(i)~(iii)の手順で免疫染色処理を行った。
蛍光標識処理(2-1A)を行った組織アレイスライドを4%中性パラホルムアルデヒド水溶液中に10分間浸漬することにより、蛍光体集積粒子固定処理を行った。
蛍光体集積粒子固定処理(2-2)を行った組織アレイスライドに対して、以下の(i)~(ii)の手順で形態観察用染色処理(HE染色、ヘマトキシリン-エオシン染色)を行った。
形態観察用染色処理(2-3)を行った染色スライドに対して、以下の(i)~(ii)の手順で封入処理を行った。
封入処理を終えた染色スライドに対して、蛍光顕微鏡(オリンパス社製「BX-53」)を用いて所定の励起光(蛍光色素として用いたテキサスレッドの励起波長に対応した波長を有する励起光)を照射し、発光した蛍光を観察するとともに、顕微鏡用デジタルカメラ(オリンパス社製「DP73」)により蛍光染色画像の撮影を行った。前記励起光は、励起光用光学フィルターを用いて、575~600nmに設定した。また、観察する蛍光の波長(nm)の範囲についても、蛍光用光学フィルターを通すことで612~692nmに設定した。
作製例4で得られた0.02nMのストレプトアビジン修飾テキサスレッド集積シリカ粒子分散液(反応液1)25μLと、作製例8により得られた濃度6μg/mLのビオチン修飾抗HER2抗体(1次抗体)溶液(反応液2)25μLとを混合し、室温で1時間反応させることにより、抗HER2抗体(1次抗体)連結テキサスレッド集積シリカ粒子(蛍光プレミックス粒子)を含有する蛍光染色液(No.1)を調製した。
賦活化処理(1-2)を行った組織アレイスライドに対して、以下の手順で免疫染色処理を行った。
作製例4で得られた濃度0.02nMのストレプトアビジン修飾テキサスレッド集積シリカ粒子分散液10μLと、作製例8で得られた濃度6μg/mLのビオチン修飾抗HER2抗体(1次抗体)溶液90μLとを混合し、室温で1時間反応させることで、抗HER2抗体(1次抗体)連結テキサスレッド集積シリカ粒子(蛍光プレミックス粒子)を含有する蛍光染色液(No.2)を調製した。
作製例4で得られた濃度0.02nMのストレプトアビジン修飾テキサスレッド集積シリカ粒子分散液95μLと、作製例8で得られた濃度6μg/mLのビオチン修飾抗HER2抗体(1次抗体)溶液5μLとを混合し、室温で1時間反応させることで、抗HER2抗体(1次抗体)連結テキサスレッド集積シリカ粒子(蛍光プレミックス粒子)を含有する蛍光染色液(No.3)を調製した。
作製例4で得られた濃度0.02nMのストレプトアビジン修飾テキサスレッド集積シリカ粒子分散液98μLと、作製例8で得られた濃度6μg/mLのビオチン修飾抗HER2抗体(1次抗体)溶液2μLとを混合し、室温で1時間反応させることで、抗HER2抗体(1次抗体)連結テキサスレッド集積シリカ粒子(蛍光プレミックス粒子)を含有する蛍光染色液(No.4)を調製した。
まず、実施例1と同様の手順で、蛍光染色液(No.1)を調製した。
ゲル濾過担体「Sephacryl S-1000 SF」(GEヘルスケア・ジャパン社製、アリルデキストランとN,N-メチレンビスアクリルアミドが共有架橋結合した樹脂マトリックス)のデキストラン水酸基とブロモ酢酸とを16時間反応させることにより、担体表面をカルボキシメチル化した(Monchaux, E., and Vermette, P. (2008). Cell adhesion resistance mechanisms using arrays of dextran-derivative layers. J Biomed Mater Res A 85, 1052-1063参照)。なお、「Sephacryl S-1000 SF」は、粒径230nmの物体(リポソーム)が侵入し、通過できる程度の空隙を有する多孔質体である(http://lifesciencedb.jp/dbsearch/Literature/get_pne_cgpdf.php?year=1990&number=3511&file=2Qgovzb50x7RW4IcCUhKPw==参照)。
5mLの緩衝液A(0.1Mグリシン+1.2M酒石酸ナトリウム、pH9.0)を3回流すことによって工程Aで作製したプロテインA結合樹脂カラムを平衡化した。
作製例4により得られた濃度0.02nMのストレプトアビジン修飾テキサスレッド集積シリカ粒子分散液25μLと、作製例10により得られた濃度6μg/mLのビオチン修飾HER2抗原認識RNAアプタマー(1次アプタマー)溶液25μLとを混合し、室温で1時間反応させることにより、HER2抗原認識RNAアプタマー(1次アプタマー)連結テキサスレッド集積シリカ粒子(蛍光プレミックス粒子)を含有する蛍光染色液(No.6)を調製した。
作製例5で得られた濃度0.02nMのストレプトアビジン修飾テキサスレッド集積メラミン樹脂粒子分散液25μLと、作製例11で得られた濃度6μg/mLのビオチン修飾ウサギIgG認識RNAアプタマー(2次アプタマー)溶液25μLとを混合し、室温で1時間反応させることにより、ウサギIgG認識RNAアプタマー(2次アプタマー)連結テキサスレッド集積メラミン樹脂粒子(蛍光プレミックス粒子)を含有する蛍光染色液(No.7)を調製した。
賦活化処理(1-2)を行った組織アレイスライドに対して、以下の(i)および(ii)の手順で免疫染色処理を行った。
作製例6で得られた濃度0.02nMの抗DNP抗体修飾ピロメテン556集積メラミン樹脂粒子分散液10μLと、作製例12で得られた濃度6μg/mLのDNP修飾抗マウスIgG抗体(2次抗体)溶液90μLとを混合し、室温で1時間反応させることにより、第1の蛍光プレミックス粒子として、抗マウスIgG抗体(2次抗体)連結ピロメテン556集積メラミン樹脂粒子を含有する蛍光染色液(No.8A)を調製した。
(1-1)脱パラフィン処理
(i)キシレンを入れた容器に組織アレイスライドを15分間浸漬させた。途中2回キシレンを交換した。
(i)脱パラフィン処理した組織アレイスライドを水を入れた容器に10分間浸漬させた。
(2-1)二重免疫染色処理
(i)1%BSA含有PBSでそれぞれの濃度が0.05nMとなるよう希釈した抗PD-L1マウス抗体・抗EGFRウサギ抗体含有溶液を、賦活化処理した組織アレイスライドに載せて一晩放置した。
(i)PBSを入れた容器に、二重免疫染色処理後の組織アレイスライドを30分間浸漬させた。
得られた染色スライドにMerck社製Aquatexを滴下後、カバーガラスを載せることで封入処理を行った。
封入処理を終えた染色スライドを、緑色用および赤色用の2種類のフィルターセット(Semrock社製、下記表3参照)を備えた蛍光顕微鏡(Carl Zeiss社製)のステージに設置した。両方のフィルターセットのそれぞれにおいて、染色スライドの蛍光像の画面全体の蛍光輝点から算出された合計輝度値および一輝点毎の輝度値を計測した。国際公開第2017/014196号に記載の「第1の算出方法」および「第2の算出方法」に従って、2種類の蛍光プレミックス粒子それぞれの輝度比率を算出したところ、どちらの輝度比率も同じであり(表4参照)、また、PD-L1:EGFR=100:1900の割合で発現していることが確認された(表5)。
10:蛍光体集積粒子
15:リンカー
20:第1反応性物質
21:ストレプトアビジン
30:第2反応性物質
31:ビオチン
40:目的タンパク質結合性物質
41:1次抗体
42:2次抗体
100:組織切片
150:目的タンパク質
Claims (11)
- 第1反応性物質で修飾された蛍光体集積粒子と、第2反応性物質で修飾された、抗体およびアプタマーからなる群より選ばれる少なくとも1種の目的タンパク質結合性物質とが、第1反応性物質と第2反応性物質との相互作用により連結している、蛍光プレミックス粒子。
- 前記第1反応性物質がストレプトアビジンであり、前記第2反応性物質がビオチンである、請求項1に記載に記載の蛍光プレミックス粒子。
- 前記目的タンパク質結合性物質が、目的タンパク質に特異的に結合する1次抗体または1次アプタマーである、請求項1または2に記載の蛍光プレミックス粒子。
- 前記目的タンパク質結合性物質が、目的タンパク質に特異的に結合する1次抗体に特異的に結合する2次抗体または2次アプタマーである、請求項1または2に記載の蛍光プレミックス粒子。
- 前記蛍光体集積粒子が、樹脂製の母体と蛍光体とを含む粒子である、請求項1~4のいずれか一項に記載の蛍光プレミックス粒子。
- 前記蛍光体集積粒子の表面の単位面積あたりに連結している前記目的タンパク質結合性物質の数が、0.003~0.012個/nm2である、請求項1~5のいずれか一項に記載の蛍光プレミックス粒子。
- 請求項1~6のいずれか一項に記載の蛍光プレミックス粒子を含有する蛍光染色液。
- 発光波長のピークが互いに100nm以上離れている2種類以上の蛍光プレミックス粒子を含有する、一液型または多液型である、請求項7に記載の蛍光染色液。
- 請求項3に記載の蛍光プレミックス粒子を含有する蛍光染色液を使用する染色法であって、
目的タンパク質に前記蛍光染色液中の蛍光プレミックス粒子を結合させる処理を含む、蛍光染色法。 - 請求項4に記載の蛍光プレミックス粒子を含有する蛍光染色液を使用する染色法であって、
目的タンパク質に前記1次抗体を結合させる処理、および
目的タンパク質に結合させた1次抗体に前記蛍光染色液中の蛍光プレミックス粒子を結合させる処理を含む、蛍光染色法。 - 請求項8に記載の蛍光染色液を使用する染色法であって、
2種以上の目的タンパク質のそれぞれに、前記蛍光染色液中の対応する蛍光プレミックス粒子のそれぞれを、直接的または間接的に結合させる処理を含む、蛍光染色法。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020148985A1 (ja) * | 2019-01-18 | 2020-07-23 | コニカミノルタ株式会社 | 標的物質検出用蛍光体集積ナノ粒子 |
| JP2020148610A (ja) * | 2019-03-13 | 2020-09-17 | 株式会社豊田中央研究所 | 潤滑剤の分布状態測定システム及び潤滑剤の分布状態測定方法 |
| WO2023182121A1 (ja) * | 2022-03-22 | 2023-09-28 | Dic株式会社 | マスターバッチ、それを用いた樹脂組成物および成形体の製造方法 |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012133047A1 (ja) | 2011-03-25 | 2012-10-04 | コニカミノルタエムジー株式会社 | 免疫組織染色法、およびこれを用いた抗体医薬の有効性を判定する方法 |
| WO2013035688A1 (ja) | 2011-09-09 | 2013-03-14 | コニカミノルタエムジー株式会社 | 組織染色方法 |
| WO2013035703A1 (ja) | 2011-09-09 | 2013-03-14 | コニカミノルタエムジー株式会社 | 生体物質検出方法 |
| WO2013147081A1 (ja) | 2012-03-30 | 2013-10-03 | コニカミノルタ株式会社 | 生体物質検出方法 |
| WO2014136885A1 (ja) | 2013-03-08 | 2014-09-12 | コニカミノルタ株式会社 | 組織染色用染色剤、組織染色用染色剤の製造方法および組織染色用染色剤を含む組織染色用キット |
| WO2014136776A1 (ja) | 2013-03-08 | 2014-09-12 | コニカミノルタ株式会社 | 蛍光標識用樹脂粒子 |
| WO2014203614A1 (ja) * | 2013-06-19 | 2014-12-24 | コニカミノルタ株式会社 | 生体分子染色用の蛍光ナノ粒子およびその製造方法 |
| JP2015117980A (ja) | 2013-12-18 | 2015-06-25 | コニカミノルタ株式会社 | 染色方法 |
| WO2015146896A1 (ja) | 2014-03-24 | 2015-10-01 | コニカミノルタ株式会社 | 多重免疫染色法に基づく生体物質の定量方法 |
| WO2015159776A1 (ja) | 2014-04-16 | 2015-10-22 | コニカミノルタ株式会社 | 蛍光体集積ナノ粒子、これを用いた染色試薬、キットおよび蛍光免疫染色法 |
| WO2015163209A1 (ja) | 2014-04-23 | 2015-10-29 | コニカミノルタ株式会社 | 蛍光色素内包樹脂粒子の保存液 |
| WO2016129444A1 (ja) | 2015-02-12 | 2016-08-18 | コニカミノルタ株式会社 | 抗体結合蛍光体集積ナノ粒子、抗体結合蛍光体集積ナノ粒子の製造方法および免疫染色キット |
| WO2016152244A1 (ja) * | 2015-03-25 | 2016-09-29 | コニカミノルタ株式会社 | 目的生体物質の検出方法および検出システム |
| WO2017014196A1 (ja) | 2015-07-17 | 2017-01-26 | コニカミノルタ株式会社 | 目的生体物質の解析方法および解析システム |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015045961A1 (ja) * | 2013-09-26 | 2015-04-02 | コニカミノルタ株式会社 | 蛍光ナノ粒子標識体、多重免疫染色剤キットおよび多重免疫染色法 |
| EP3115783A4 (en) * | 2014-03-06 | 2017-10-11 | Konica Minolta, Inc. | Integrated phosphor nanoparticle marking agent, and fluorescent immunostaining method employing same |
| JP6743703B2 (ja) * | 2014-11-06 | 2020-08-19 | コニカミノルタ株式会社 | 免疫染色法、およびこれに用いられる免疫染色試薬キット |
| EP3249403A4 (en) * | 2015-01-21 | 2019-01-16 | Konica Minolta, Inc. | PHOSPHORAGGREGATNANOPARTICLES FOR FLUORESCENT OBSERVATION |
-
2017
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- 2017-04-07 JP JP2019511047A patent/JPWO2018185943A1/ja active Pending
- 2017-04-07 US US16/491,876 patent/US20210011007A1/en not_active Abandoned
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012133047A1 (ja) | 2011-03-25 | 2012-10-04 | コニカミノルタエムジー株式会社 | 免疫組織染色法、およびこれを用いた抗体医薬の有効性を判定する方法 |
| WO2013035688A1 (ja) | 2011-09-09 | 2013-03-14 | コニカミノルタエムジー株式会社 | 組織染色方法 |
| WO2013035703A1 (ja) | 2011-09-09 | 2013-03-14 | コニカミノルタエムジー株式会社 | 生体物質検出方法 |
| WO2013147081A1 (ja) | 2012-03-30 | 2013-10-03 | コニカミノルタ株式会社 | 生体物質検出方法 |
| WO2014136885A1 (ja) | 2013-03-08 | 2014-09-12 | コニカミノルタ株式会社 | 組織染色用染色剤、組織染色用染色剤の製造方法および組織染色用染色剤を含む組織染色用キット |
| WO2014136776A1 (ja) | 2013-03-08 | 2014-09-12 | コニカミノルタ株式会社 | 蛍光標識用樹脂粒子 |
| WO2014203614A1 (ja) * | 2013-06-19 | 2014-12-24 | コニカミノルタ株式会社 | 生体分子染色用の蛍光ナノ粒子およびその製造方法 |
| JP2015117980A (ja) | 2013-12-18 | 2015-06-25 | コニカミノルタ株式会社 | 染色方法 |
| WO2015146896A1 (ja) | 2014-03-24 | 2015-10-01 | コニカミノルタ株式会社 | 多重免疫染色法に基づく生体物質の定量方法 |
| WO2015159776A1 (ja) | 2014-04-16 | 2015-10-22 | コニカミノルタ株式会社 | 蛍光体集積ナノ粒子、これを用いた染色試薬、キットおよび蛍光免疫染色法 |
| WO2015163209A1 (ja) | 2014-04-23 | 2015-10-29 | コニカミノルタ株式会社 | 蛍光色素内包樹脂粒子の保存液 |
| WO2016129444A1 (ja) | 2015-02-12 | 2016-08-18 | コニカミノルタ株式会社 | 抗体結合蛍光体集積ナノ粒子、抗体結合蛍光体集積ナノ粒子の製造方法および免疫染色キット |
| WO2016152244A1 (ja) * | 2015-03-25 | 2016-09-29 | コニカミノルタ株式会社 | 目的生体物質の検出方法および検出システム |
| WO2017014196A1 (ja) | 2015-07-17 | 2017-01-26 | コニカミノルタ株式会社 | 目的生体物質の解析方法および解析システム |
Non-Patent Citations (5)
| Title |
|---|
| ANALYTICAL BIOCHEMISTRY, vol. 375, 2008, pages 217 - 222 |
| GOLDMAN, E.R. ET AL.: "Avidin: A Natural Bridge for Quantum Dot-Antibody Conjugates", JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, vol. 124, no. 22, 5 June 2002 (2002-06-05), pages 6378 - 6382, XP002308426, DOI: doi:10.1021/ja0125570 * |
| MONCHAUX, E.VERMETTE, P.: "Cell adhesion resistance mechanisms using arrays of dextran-derivative layers", J. BIOMED MATER RES A, vol. 85, 2008, pages 1052 - 1063 |
| NUCLEIC ACID THERAPEUTICS, vol. 21, no. 3, 2011, pages 173 |
| See also references of EP3608669A4 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020148985A1 (ja) * | 2019-01-18 | 2020-07-23 | コニカミノルタ株式会社 | 標的物質検出用蛍光体集積ナノ粒子 |
| JPWO2020148985A1 (ja) * | 2019-01-18 | 2021-11-25 | コニカミノルタ株式会社 | 標的物質検出用蛍光体集積ナノ粒子 |
| JP2020148610A (ja) * | 2019-03-13 | 2020-09-17 | 株式会社豊田中央研究所 | 潤滑剤の分布状態測定システム及び潤滑剤の分布状態測定方法 |
| JP7263063B2 (ja) | 2019-03-13 | 2023-04-24 | 株式会社豊田中央研究所 | 潤滑剤の分布状態測定システム及び潤滑剤の分布状態測定方法 |
| WO2023182121A1 (ja) * | 2022-03-22 | 2023-09-28 | Dic株式会社 | マスターバッチ、それを用いた樹脂組成物および成形体の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3608669A4 (en) | 2020-06-03 |
| EP3608669A1 (en) | 2020-02-12 |
| JPWO2018185943A1 (ja) | 2020-02-13 |
| US20210011007A1 (en) | 2021-01-14 |
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