WO2005001472A1 - 抗がん作用物質のスクリーニング方法及び装置 - Google Patents
抗がん作用物質のスクリーニング方法及び装置 Download PDFInfo
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- WO2005001472A1 WO2005001472A1 PCT/JP2004/008634 JP2004008634W WO2005001472A1 WO 2005001472 A1 WO2005001472 A1 WO 2005001472A1 JP 2004008634 W JP2004008634 W JP 2004008634W WO 2005001472 A1 WO2005001472 A1 WO 2005001472A1
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- surface plasmon
- plasmon resonance
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N21/6456—Spatial resolved fluorescence measurements; Imaging
- G01N21/6458—Fluorescence microscopy
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/55—Specular reflectivity
- G01N21/552—Attenuated total reflection
- G01N21/553—Attenuated total reflection and using surface plasmons
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
-
- 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
- G01N33/5005—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells
- G01N33/5008—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics
- G01N33/5011—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving human or animal cells for testing or evaluating the effect of chemical or biological compounds, e.g. drugs, cosmetics for testing antineoplastic activity
Definitions
- the present invention relates to a method and an apparatus for measuring a cellular response to a physiologically active ingredient such as an active substance for a pile cancer, and more particularly to a screening method and an apparatus for determining the presence or absence of an action on a pile cancer.
- Fluorescence observation has recently been established as an image analysis technique for cell dynamics. Fluorescence observation can visualize real-time changes in cells, and has high specificity for the target substance and is very effective for understanding the reaction mechanism.
- biosensors using an optical phenomenon called surface plasmon resonance (SPR) can measure a wide range of phenomena in real time by capturing changes in the dielectric constant due to the coupling between molecules.
- SPR surface plasmon resonance
- a composite device capable of simultaneously performing surface plasmon resonance angle measurement and fluorescence observation has been proposed (see JP-A-2002-62255).
- the surface plasmon resonance method can be used as a method for analyzing cell dynamics, but is used as a screening method.
- the inventors of the present invention have found that when an anticancer substance is acted on cancer cells, its pile cancer action and its change in a time zone in which the rate of change of surface plasmon resonance angle with time is stable are stable.
- the present inventors have found that there is a correlation between the ratio and the ratio, and utilized the relationship for the screening of a pile cancer active substance, thereby completing the present invention.
- the present invention is a screening method for evaluating whether or not a target reagent has an anticancer effect, and an effective concentration thereof, wherein the target reagent is used for a sample containing cancer cells. Reacting the reagent to be treated, measuring the surface plasmon resonance angle of the sample after the reagent action, and determining the rate of change of the obtained surface plasmon resonance angle in a time zone in which the rate of change with time is stable. And a step of evaluating the degree of anticancer action of the target reagent on target cancer cells based on the obtained rate of change in surface plasmon resonance angle.
- the time zone in which the rate of change of the surface plasmon resonance angle with respect to time is stable is a time zone in which the rate of change in a longer time zone is substantially equal to the rate of change.
- substantially equal means that they match within ⁇ 10%.
- the time period is an appropriate time period 25 minutes after the target reagent is applied to the sample containing the target cancer cells.
- the only measurement time required for screening is the time for measuring the rate of change in surface plasmon resonance angle.
- the time can be as short as 1 to 50 minutes, for example, and the process can be performed quickly. Therefore, it is easy to automate the measurement by preparing a plurality of samples and sequentially performing the surface plasmon resonance angle measurement for that time.
- the change of the surface plasmon resonance with respect to time can be measured as the time change of the surface plasmon resonance angle or the time change of the reflected light intensity at the surface plasmon resonance angle in the initial state.
- SPR surface plasmon resonance
- a metal surface is resonantly excited using an evanescent wave obtained by light such as laser light.
- the evanescent wave can be generated on the opposite side of the reflecting surface by causing total reflection in the prism.
- the evanescent wave passes through the metal layer and passes through the surface plasmon of the metal opposite surface. Is excited by resonance.
- Factors that determine the conditions that cause resonance include the dielectric constant of the material that forms an interface with the metal layer.Since the intermolecular interaction involves a change in the dielectric constant, the resonance conditions are determined by this.
- the condition of the evanescent wave that can induce resonance also changes.Conversely, by knowing the change in the condition of the evanescent wave that induces resonance, it is possible to know the change in dielectric constant, fins, and finally the coupling between molecules. Can be. Actually, the condition of the evanescent wave changes depending on the incident angle ⁇ of the incident laser light. The angle of incidence and the angle of reflection are defined as the angle to the normal of the substrate as shown in Fig. 4 (B).
- the evanescent wave is affected by the substance on the metal layer, so that the reflected light intensity sharply decreases as shown in FIG. 4 (A). This change in reflected light intensity is detected by a detector, and the incident angle (resonance angle) at which the reflected light intensity is attenuated is plotted, whereby a change in a minute area on the metal layer can be known.
- the surface plasmon resonance method is widely used as a protein interaction analysis technique, but usually, the practicality and sensitivity are improved by immobilizing the protein by binding a monomolecular film or the like to the surface of the metal thin film.
- An example of culturing cells directly on a metal thin film and measuring the cell response has also been reported (see Michihiro Hide, Tomoko Tsutsui, Analytical Biochemistry. 302, 28-37 (2002)). This is an analysis technology that can be used to determine the response of the Itoda cell in situ.
- the degree of the pile cancer action in the screening it is preferable to prepare a calibration curve. Therefore, the relationship between the degree of pile cancer action and the rate of change in surface plasmon resonance when a known anticancer agent is applied to a sample containing the target cancer cells is separately determined and used as calibration curve data, and screening is performed. In the evaluation step in, the degree of the anticancer effect of the target reagent on the target cancer cell may be evaluated based on the calibration curve data.
- the degree of anticancer action for obtaining calibration curve data the reduction in cancer cells due to the action of the anticancer agent on the target cancer cells is determined by counting the number of cells, or It can be obtained by measuring fluorescence from cells. As the fluorescence, natural fluorescence of the cell may be used in some cases. However, in order to perform measurement with higher sensitivity, it is preferable to measure the fluorescence from a fluorescent reagent obtained by converting cancer cells into a fluorescent derivative.
- the apparatus for realizing the screening method of the present invention includes a surface plasmon resonance measuring apparatus (SPR) 2 for measuring surface plasmon resonance and a sample containing a target cancer cell.
- SPR surface plasmon resonance measuring apparatus
- a surface plasmon resonance angle change rate calculation unit 4 for obtaining a change rate of a surface plasmon resonance angle at a predetermined time by the surface plasmon resonance measurement device 2 after the target reagent is applied, and a surface plasmon resonance angle change rate calculation unit
- a screening unit 8 for evaluating the anticancer effect of the target reagent on the target cancer cells based on the surface plasmon resonance angle change rate obtained in 4 above.
- calibration curve data showing the relationship between the degree of anticancer action on target cancer cells and the rate of change in surface plasmon resonance angle are used. It is preferable that a calibration curve data holding unit 6 is further provided.
- the screening unit 8 uses the surface plasmon resonance angle change rate calculated by the surface plasmon resonance angle change rate calculation unit 4 and the calibration curve data stored in the calibration curve data storage unit 6 to determine the objective for the target cancer cell. Evaluate the anticancer effect of the reagent.
- the surface plasmon resonance measurement apparatus 2 is equipped with a fluorescence microscope 10 as an integral part, so as to enable the measurement of cell kinetics simultaneously or separately with the surface plasmon resonance measurement. It's preferable that there is.
- the dynamics of cells refer to nucleic acids, proteins and sugar chains that are biomolecules, and hormones and phosphates that are chemical components.
- the calibration curve data holding unit 6 stores the results of the surface plasmon resonance angle change rate calculation unit 4 when a known anticancer agent is applied to target cancer cells, Calibration curve data separately obtained based on the result of measurement of the decrease in cancer cells due to this can be retained.
- the calibration curve data holding unit 6 also allows a known anticancer substance to act on the target cancer cell.
- the results obtained by the surface plasmon resonance angle change rate calculation unit 4 and the intensity of the fluorescence generated by exciting the target cancer cell or a fluorescent reagent derived from the target cancer cell by fluorescence derivation are measured using a fluorescence microscope 10 to determine the Calibration curve data created based on the results obtained by reducing the number of cancer cells caused by the action of a cancer agent can also be retained.
- the screening method and apparatus of the present invention allow a sample containing a target cancer cell to act on a target reagent, measure the surface plasmon resonance angle of the sample after the action of the reagent, and determine the rate of change with respect to time.
- the rate of change in the time period during which is stable was evaluated to evaluate the degree of anticancer action of the target reagent on target cancer cells.
- the measurement time required for screening was determined by the surface plasmon resonance angle change. Only the time for measuring the rate is required, and the processing can be performed quickly.
- the screening device of the present invention includes a surface plasmon resonance angle measuring device and a fluorescence microscope as one body, it becomes possible to perform both surface plasmon resonance angle measurement and cell dynamics measurement.
- FIG. 1 is a block diagram schematically showing a device of the present invention.
- FIG. 2 is a block diagram schematically showing another embodiment of the device of the present invention.
- FIG. 3 is a view schematically showing a screening apparatus of an embodiment.
- FIG. 4 is a diagram for explaining the principle of surface plasmon resonance, where (A) is a graph showing the dependence of the reflectance on the incident angle, and (B) is a diagram showing the incident angle and the reflection angle.
- FIG. 5 is a chemical structural formula showing a reagent used in an example.
- FIG. 6 is a graph showing the relationship between each reagent concentration and cell viability.
- FIG. 7 is a graph showing a time change of a surface plasmon resonance signal after administration of each reagent.
- FIG. 8 is a graph showing a relationship between each reagent concentration and a surface plasmon resonance signal change rate.
- FIG. 9 is a graph showing the relationship between cell viability and surface plasmon resonance signal change rate.
- FIG. 10 is a fluorescence image showing the response of cancer cells to taercetin (reagent) and control.
- FIG. 11 is a fluorescence image showing the response of cancer cells to trans-resveratrol (reagent) and rutin (reagent).
- FIG. 3 is a diagram schematically showing a screening apparatus according to one embodiment.
- the surface plasmon resonance includes a light source 22 for allowing incident light 24 to enter the sensor chip 20 installed on the sample table under the condition of total reflection, and a light receiving device 28 for receiving the reflected light 26.
- the prism 30 is provided to reflect all the light.
- the light source 22 and the light receiving device 28 scan the surface plasmon resonance by simultaneously changing the incident angle ⁇ and the reflection angle ⁇ ⁇ ⁇ ⁇ with respect to the vertical line of the incident surface of the sensor chip 20 and measuring the intensity change of the reflected light 26. Supported by
- the sensor chip 20 is a metal layer formed on a glass substrate, for example, a gold thin film by a method such as vapor deposition, and a cell 32 is provided as a sample on the metal layer. .
- a reagent whose anti-cancer effect is to be evaluated acts on the cells 32.
- a fluorescence microscope is provided integrally with this surface plasmon resonance apparatus.
- Reference numeral 34 denotes an objective lens of the fluorescence microscope, which can be visually observed by an eyepiece 36.
- the fluorescence microscope is equipped with a xenon lamp (75W) as an excitation light source, and is equipped with respective spectroscopes for selecting an excitation wavelength and a fluorescence detection wavelength.
- the fluorescent image can be captured by an imaging device 38 such as a CCD camera, so that the number of cells in the field of view can be counted, and the fluorescence intensity can be detected simultaneously with or separately from the measurement of surface plasmon resonance. I have.
- a control device 40 is provided to control the operation of the surface plasmon resonance device and change the incident angle and the reflection angle ⁇ to obtain the surface plasmon resonance angle.
- the control device 40 is composed of a computer, and also implements the functions of the surface plasmon resonance change rate calculation unit 4 and the screening unit 8 shown in FIGS. 1 and 2 and a storage device that implements the calibration curve data holding unit 6. It also has.
- the control device 40 also controls the operations of counting the number of cells via the fluorescence microscope 10 and detecting the fluorescence intensity, thereby realizing a function of creating calibration curve data.
- Extracts quercetin which is considered to have antiproliferative activity as a reagent
- tiger Trans-resveratrol and rutin which is considered to have no such antiproliferative effect
- the measurement was performed using a surface plasmon resonance device and a fluorescence microscope.
- anti-cancer effects of luteolin (Luteolin) as an extract component having anti-proliferative effect and harceptin (Herein tin) as an antibody pile cancer drug used clinically were measured by a proliferation test and surface plasmon resonance measurement device. It was determined from the measurement and compared with the calibration curve data of the anticancer effect obtained with quercetin, resveratrol, rutin, and control.
- FIG. 5 shows the chemical structural formulas of these four types of reagents (the structural formulas are omitted because noceptin is an antibody).
- human spleen cancer cells (cell line: MIA PaCa_2, obtained from Human Science Research Resource Bank) were used.
- EMEM Eagle's minimum essential medium
- FBS Fetal bovine serum
- NEAA non-essential amino acids
- Cells in a logarithmic growth phase cultured in a 6 cm diameter petri dish are detached from the petri dish using EDTA-trypsin, and the cells are collected by centrifugation, stained with 0.1% trypan blue, and counted using a hemocytometer. The cells were prepared and adjusted to a cell concentration of 5 ⁇ 10 4 cells / ml and subcultured.
- the medium was replaced with a medium containing 10, 25, 50, and 100 ⁇ l of taercetin, trans-resveratrol, and rutin, respectively.
- a medium in which DMSO (dimethyl sulfoxide) used for dissolving the reagent was added to a medium of the same concentration (0.1%) was prepared and used in the same manner as the medium containing the reagent.
- FIG. 6 shows the results.
- the anti-proliferative effect of trans-resveratrol shows a concentration-dependent anti-proliferative effect
- the anti-proliferative effect of quercetin is scarcely observed below 10 aM, but at higher concentrations it shows a concentration-dependent anti-proliferative effect.
- Rutin has no antiproliferative effect.
- quercetin has been shown to affect many cancer cells, including the cell line used in the examples. In contrast, it has been shown to induce apoptosis (Michelle Mouria, Anna
- the measurement was performed for one hour. Immediately after the sensor chip was set in the measuring section of the apparatus shown in Fig. 3, the medium was filled with the medium and measurement was started. Ten minutes later, the medium containing 10, 25, 50, and 100 / iM Taercetin, trans-resveratrol, and rutin was exchanged with a medium containing DMSO as a control, and measurement was continued for another 50 minutes. Was.
- FIG. 7 shows the results obtained by exchanging the medium with each containing 100 ⁇ l of taercetin, trans-resveratrol and rutin.
- the measurement results were expressed as the time change from the start of the measurement of the incident angle for exciting the resonance.
- taercetin, luteolin and trans-resveratrol there was a clear change in surface plasmon resonance response several minutes after administration. In contrast, no change was observed in the administration of the medium containing rutin.
- the slope of a curve obtained by surface plasmon resonance response for 5 minutes of 2700 to 3000 seconds (45 to 50 minutes) after the start of measurement was determined.
- the time region is a region in which the time change of the surface resonance angle is stable.
- Fig. 8 shows the slope, that is, the correlation between the time rate of change of the surface sounding angle and the reagent concentration.
- FIG. 9 shows the correlation between the survival rate for each concentration of the reagent and the slope of the surface plasmon resonance response.
- the results of luteolin and herceptin were also added. It can be seen that there is a linear correlation between the cell viability and the slope of the surface plasmon resonance response. If this result is used as a calibration curve, the cell survival rate, that is, the anticancer effect can be quantitatively evaluated by measuring the change rate of the surface plasmon resonance response in a predetermined short time.
- One method of analyzing cell response by fluorescence observation is to monitor changes in intracellular pH.
- the initial response of a cell to a substance that has some effect on the cell is a phenomenon that changes the intracellular pH, such as phosphorylation or changes in calcium ion concentration.
- intracellular pH decreases as an early step in apoptosis induced by quercetin and transresveratrol (Matsuyama, S., Llopis, J "Deveraux, QL, Tsien, RY & Reed, J. Shi. Nature Cell Biol. 2, 318-325 (2000)) Therefore, as one index for analyzing cell response, the change in intracellular pH is measured by the fluorescence intensity of a pH-sensitive fluorescent finger. It was measured as a change.
- 5- (and-6) -Carboxy SNAFL-1 Diacetate a pH-sensitive fluorescent reagent
- the medium was again placed under culture conditions for 1 hour, the medium was replaced again to remove the fluorescent reagent, and then the measurement was performed.
- a xenon lamp 75 W was used as the excitation light source, with an excitation wavelength of 460 500 nm and a detection wavelength of 510 560 ⁇ . m.
- the medium was replaced with 100 / iM of taercetin, transresveratrol, rutin, or control medium, respectively.
- the results are shown in FIGS. 10 and 11.
- the fluorescence images are shown at the start of the measurement (0 minutes), at the lapse of 45 minutes and 50 minutes, which are the screening index time zones, and at 60 minutes at the end of the measurement.
- the control medium no change was observed, whereas in the cells to which ⁇ of quercetin and trans-resveratrol were administered, a clear decrease in the fluorescence intensity due to intracellular acidification was observed.
- a cellular response to a reagent having a carcinogenic effect was observed.
- the results provide strong evidence that the results of surface plasmon resonance measurements capture cellular responses.
- the fluorescence intensity by a fluorescence microscope can be used.
- a calibration curve as shown in FIG. 9 can be created.
- results obtained by the fluorescence microscope are not only supported by the results obtained by surface plasmon resonance, but also by means of changing the measurement target to allow a deeper understanding of the physiological activities of the extracted components. Very useful as well.
- the present invention can be used for screening to evaluate the degree of anticancer effect of a target reagent on a target cancer cell.
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-181273 | 2003-06-25 | ||
| JP2003181273A JP2005017081A (ja) | 2003-06-25 | 2003-06-25 | 抗がん作用物質のスクリーニング方法及び装置 |
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| WO2005001472A1 true WO2005001472A1 (ja) | 2005-01-06 |
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| PCT/JP2004/008634 Ceased WO2005001472A1 (ja) | 2003-06-25 | 2004-06-18 | 抗がん作用物質のスクリーニング方法及び装置 |
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| JP (1) | JP2005017081A (ja) |
| WO (1) | WO2005001472A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101336297B (zh) * | 2005-12-14 | 2011-09-07 | 国立大学法人九州大学 | 细胞内线粒体的极化监控 |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060223051A1 (en) * | 2005-04-05 | 2006-10-05 | Ye Fang | System and method for performing G protein coupled receptor (GPCR) cell assays using waveguide-grating sensors |
| JP4663426B2 (ja) * | 2005-07-01 | 2011-04-06 | 花王株式会社 | 粉末洗浄剤組成物 |
| JP4672560B2 (ja) * | 2006-01-19 | 2011-04-20 | 富士フイルム株式会社 | 化合物スクリーニング方法および装置 |
| JP4732905B2 (ja) * | 2006-01-24 | 2011-07-27 | 富士フイルム株式会社 | スクリーニング方法および装置 |
| JP2010096645A (ja) * | 2008-10-17 | 2010-04-30 | National Institute Of Advanced Industrial Science & Technology | 周期構造を有するマイクロプレート、並びに、それを用いた表面プラズモン励起増強蛍光顕微鏡、蛍光マイクロプレートリーダーおよび特異的な抗原抗体反応の検出方法 |
| JP5622215B2 (ja) * | 2013-10-29 | 2014-11-12 | 独立行政法人産業技術総合研究所 | 周期構造を有するマイクロプレート、並びに、それを用いた表面プラズモン励起増強蛍光顕微鏡、蛍光マイクロプレートリーダーおよび特異的な抗原抗体反応の検出方法 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03266998A (ja) * | 1990-03-16 | 1991-11-27 | King Jozo Kk | 生細胞数測定方法 |
| JPH10307134A (ja) * | 1997-05-07 | 1998-11-17 | Seitai Hikarijoho Kenkyusho:Kk | 極微弱光測定方法および装置 |
| JPH11287762A (ja) * | 1998-04-01 | 1999-10-19 | Seitai Hikarijoho Kenkyusho:Kk | 腫瘍の組織活性度検出方法及びその装置 |
| JP2001208755A (ja) * | 2000-01-28 | 2001-08-03 | Fukuoka Prefecture | 表面プラズモン共鳴を利用する生理活性物質のスクリーニング方法 |
-
2003
- 2003-06-25 JP JP2003181273A patent/JP2005017081A/ja active Pending
-
2004
- 2004-06-18 WO PCT/JP2004/008634 patent/WO2005001472A1/ja not_active Ceased
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03266998A (ja) * | 1990-03-16 | 1991-11-27 | King Jozo Kk | 生細胞数測定方法 |
| JPH10307134A (ja) * | 1997-05-07 | 1998-11-17 | Seitai Hikarijoho Kenkyusho:Kk | 極微弱光測定方法および装置 |
| JPH11287762A (ja) * | 1998-04-01 | 1999-10-19 | Seitai Hikarijoho Kenkyusho:Kk | 腫瘍の組織活性度検出方法及びその装置 |
| JP2001208755A (ja) * | 2000-01-28 | 2001-08-03 | Fukuoka Prefecture | 表面プラズモン共鳴を利用する生理活性物質のスクリーニング方法 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101336297B (zh) * | 2005-12-14 | 2011-09-07 | 国立大学法人九州大学 | 细胞内线粒体的极化监控 |
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| JP2005017081A (ja) | 2005-01-20 |
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