WO2017195838A1 - 測定対象物質の比較対象物質に対する割合を求める方法、プログラム、記憶媒体及び装置 - Google Patents
測定対象物質の比較対象物質に対する割合を求める方法、プログラム、記憶媒体及び装置 Download PDFInfo
- Publication number
- WO2017195838A1 WO2017195838A1 PCT/JP2017/017734 JP2017017734W WO2017195838A1 WO 2017195838 A1 WO2017195838 A1 WO 2017195838A1 JP 2017017734 W JP2017017734 W JP 2017017734W WO 2017195838 A1 WO2017195838 A1 WO 2017195838A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- concentration
- absorbance
- total
- target substance
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- 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
-
- 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
- G01N33/5002—Partitioning blood components
-
- 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
- G01N33/536—Immunoassay; Biospecific binding assay; Materials therefor with immune complex formed in liquid phase
-
- 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
-
- 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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
-
- 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
- G01N33/551—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being inorganic
- G01N33/553—Metal or metal coated
-
- 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
- G01N33/66—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood sugars, e.g. galactose
-
- 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
- G01N33/72—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood pigments, e.g. haemoglobin, bilirubin or other porphyrins; involving occult blood
-
- 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
- G01N33/72—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood pigments, e.g. haemoglobin, bilirubin or other porphyrins; involving occult blood
- G01N33/721—Haemoglobin
- G01N33/723—Glycosylated haemoglobin
-
- G—PHYSICS
- G06—COMPUTING OR CALCULATING; COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
- G06F17/10—Complex mathematical operations
- G06F17/18—Complex mathematical operations for evaluating statistical data, e.g. average values, frequency distributions, probability functions, regression analysis
-
- 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
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
- G01N2021/3155—Measuring in two spectral ranges, e.g. UV and visible
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/76—Assays involving albumins other than in routine use for blocking surfaces or for anchoring haptens during immunisation
- G01N2333/765—Serum albumin, e.g. HSA
Definitions
- the present invention relates to a technique for measuring a ratio of a measurement substance to a comparison target substance.
- Specimen tests performed in clinical tests include proteins, enzymes, electrolytes, metal ions, lipids, carbohydrates, vitamins, etc. in specimens of blood, spinal fluid, urine, stool, tissues and cells collected from patients.
- chemical substances for example, it is possible to grasp the abnormalities of organs, the state of infection by bacteria or viruses, etc., so it can be used as a means for diagnosing diseases, judging treatment policies, and obtaining treatment effect indicators It is done.
- the measured value is expressed in terms of concentration, for example, mg / dL or mol / L is used.
- concentration for example, mg / dL or mol / L is used.
- activity value is expressed, and the unit of enzyme or international unit, for example, IU / L is used as the unit.
- Blood glucose that is, glucose, which is one of the objects to be measured, is measured in order to grasp the pathological condition (high blood sugar level) of a diabetic patient, and mg / dL is used as the unit, for example, in Japan.
- the exact blood glucose level at the time of blood collection can be grasped, but the blood glucose level is constantly fluctuating (the fasting reference value is less than 110 mg / dL, and the reference value after 2 hours after meal is less than 140 mg / dL) ),
- the fluctuation range of blood sugar (the state of blood sugar) cannot be grasped. That is, the effect of blood glucose control performed as a treatment for diabetic patients cannot be grasped.
- the degree of protein glycation that reflects the state of blood glucose over a certain period is used as an index.
- HbA1c or glycoalbumin is used as an index.
- HbA1c is a chromoprotein in erythrocytes, and is a heterotetramer composed of two ⁇ subunits and two ⁇ subunits. Hb in erythrocytes binds to glucose non-enzymatically, that is, in a blood glucose concentration-dependent manner while erythrocytes circulate in the body. Thus, Hb bound to glucose and glycated Hb are HbA1.
- HbA1c is the one in which glucose is bound to the N-terminus of the ⁇ subunit. It is used as an index reflecting the state. As a measured value, the ratio of HbA1c to the total Hb, that is, the relative amount, and% as a unit are used.
- glycoalbumin occupies most of blood proteins, and as it circulates in the body with blood, as with hemoglobin, it binds to sugar, and albumin bound to sugar and glycated albumin are glycoalbumin.
- Glycoalbumin is used as an index reflecting the state of blood glucose over the past 2-3 weeks from the time of blood collection.
- a ratio of glycoalbumin to total albumin that is, a relative amount, and% as a unit are used.
- the ratio (relative amount) of the substance to be measured with respect to the substance to be compared is used as a measurement value.
- isozyme for example, lactate dehydrogenase. That is, isozymes having different origins.
- the ratio of the measurement target substance to the comparison target substance is used as the measurement value because the total amount of the comparison target substance varies depending on the individual, sex, age, disease, etc. This is because the pathological condition cannot be accurately grasped even if expressed in terms of mass per unit volume.
- the total Hb concentration in human blood is in the range of 13.1 to 16.6 g / dL for males and in the range of 12.1 to 14.6 g / dL for females.
- the reference value of the total Hb concentration includes gender differences, individual differences, and intra-individual differences.
- the total Hb concentration varies greatly depending on the presence or absence of diseases that cause anemia (iron deficiency anemia, aplastic anemia, etc.), erythrocytosis, and dehydration. Therefore, even if it is expressed by the concentration of HbA1c, Hb is glycated in a blood glucose concentration-dependent manner.
- the total Hb concentration is not seen, that is, a display value that can simultaneously grasp the relationship between HbA1c and the total Hb concentration. Unless it is used, the state of blood glucose cannot be accurately grasped. In other words, even if the concentration of HbA1c is the same, the ratio of HbA1c to total Hb is low in humans with a high total Hb concentration, and the ratio of HbA1c to total Hb is high in humans with a low total Hb concentration.
- HbA1c As a method for obtaining the ratio of the measurement target substance to the comparison target substance as a measurement value, HbA1c will be described as an example.
- a method using HPLC is known, and in this method, the measurement target substance and the comparison target are compared.
- the ratio of HbA1c to the total Hb is determined directly from the peak area of the target substance.
- an immunization method (aggregation method or aggregation inhibition method) is known (for example, refer to Patent Documents 1, 2, and 3), and the HbA1c concentration and the total Hb concentration in the sample are respectively obtained. Finally, the ratio of HbA1c to the total Hb is obtained.
- HbA1c and Hb in the sample are denatured, then an immune reaction is performed, and the HbA1c concentration and the total Hb concentration in the sample due to the change in absorbance caused by the immune reaction are respectively determined, and finally HbA1c. Is calculated for the total Hb.
- an agglutination method and an aggregation inhibition method are known.
- HbA1c and Hb in the sample are first denatured, then the total Hb concentration is obtained from the absorbance, and then the glycated dipeptide derived from the ⁇ -subunit N-terminal derived from protease treatment with HbA1c is subjected to fructose.
- the HbA1c concentration is determined by measuring absorbance using a color development reaction caused by hydrogen peroxide generated by the action of tosyl peptide oxidase and further peroxidase and a color former, and finally the ratio of HbA1c to total Hb is determined. .
- Japanese Patent No. 2596322 Japanese Patent No. 3550614 Japanese Patent No. 5465008
- the first method has a problem that the measuring device is large and expensive, and the column of consumable parts is expensive.
- the reagent should be used at least twice during sample pretreatment (hemolysis treatment, dilution treatment or denaturation treatment) and measurement.
- sample mixing step the volume of the reagent and the sample is likely to vary, and the reliability of the HbA1c concentration and the total Hb concentration, and hence the ratio of HbA1c to the total Hb, must be reduced.
- the ratio of HbA1c to the total Hb is obtained directly from the absorbance measurement value without being affected by the volume ratio of the reagent and the sample.
- the total Hb concentration varies from sample to sample as described above, it is necessary to prepare an infinite number of calibration curves for each total Hb concentration, which is impossible as a practical problem.
- the present invention is a technique for obtaining a ratio of a measurement target substance to a comparison target substance, and in particular, when the concentration of the comparison target substance varies from sample to specimen, It aims at providing the technique which calculates
- Ratio of target substance to be compared [X] / (concentration coefficient x concentration of target substance) (1) And a step of obtaining a regression equation representing the relationship between the concentration coefficient for each concentration of the comparison target substance and the concentration of the comparison target substance.
- the step of obtaining the amount of change in absorbance is a step of obtaining the amount of change in absorbance increase or decrease at a characteristic single wavelength caused by the progress of a reaction caused by the specimen containing the substance to be measured and the measurement reagent, or measurement.
- the first change in the first wavelength at which the absorbance increases or decreases which is a characteristic change in the increase or decrease in absorbance at two wavelengths caused by the progress of the reaction caused by the analyte containing the target substance and the measurement reagent. Determining the difference or ratio between the second absorbance at the second wavelength at which the absorbance increases or decreases.
- the measurement reagent is a measurement reagent using any one of an agglutination method, an agglutination inhibition method, and an enzyme method of an immunization method, and the concentration coefficient optimized for each concentration of the above-described formula (1) and a comparison target substance And the concentration of the comparison target substance, and the absorbance change amount obtained by measuring the sample containing the measurement target substance using the measurement reagent, the step of obtaining the ratio of the measurement target substance to the comparison target substance.
- the present invention may be a program for causing a computer to execute any one of the methods described above.
- it may be a computer-readable recording medium for recording the program.
- the present invention is an apparatus for determining a ratio of a measurement target substance to a comparison target substance using a measurement reagent of the measurement target substance, a control unit for executing any one of the methods described above, an absorbance It is preferable that the control unit and the absorbance measurement unit are provided integrally or separately.
- the present invention may be a device having a control unit that incorporates the program described above, or may be a device having a control unit that reads the program described above.
- the present invention may be an apparatus having a control unit incorporating a regression equation obtained by executing the method described above.
- the present invention may be an apparatus having a control unit that reads a regression equation obtained by executing the method described above.
- the ratio of the measurement target substance to the comparison target substance can be determined more easily.
- FIG. 3 is a diagram obtained based on the data in FIG.
- FIG. 6 is a diagram in which the concentration factor Factor is set so that the factor becomes 1.00 when the total Hb concentration is 1.5 mg / mL, and increases when the total Hb concentration decreases and decreases when the total Hb concentration increases. It is a figure which shows the regression curve of FIG. 7A after optimizing a density
- FIG. 8 is a calibration curve obtained uniformly based on FIG.
- FIG. 8 is a flowchart figure which shows an example of the process by this Embodiment. It is a figure following FIG. It is a figure following FIG. 11A, and is the flowchart figure which put together the procedure of measurement value calculation.
- FIG. 11B is a flowchart showing a processing example of step S7 in FIG. 11A for obtaining the density coefficient Factor.
- FIG. 14 is a flowchart showing a processing example of step S7-4 in FIG. 12 for obtaining a density coefficient Factor.
- Samples having a total Hb concentration of 0.5, 0.75, 1.0, 1.5, 2.0, 2.5 mg / mL and a ratio of HbA1c to total Hb of 3.7 to 15.3% are used.
- 5 is a graph plotting the ratio of HbA1c to the total Hb 5 minutes after the start of the reaction and the ratio of the absorbance at a wavelength of 525 nm to the absorbance at a wavelength of 630 nm, that is, the absorbance ratio (Ratio).
- FIG. 6 is a diagram in which the concentration factor Factor is set so that the factor becomes 1.00 when the total Hb concentration is 1.5 mg / mL, and increases when the total Hb concentration decreases and decreases when the total Hb concentration increases. It is a figure which shows the regression curve of FIG. 16A after optimizing a density
- FIG. 5 is a diagram in which a concentration factor Factor is set so that when the Hb concentration is 2.0 mg / mL, the Factor is 1.00, and when the total Hb concentration is low, the factor is high, and when the total Hb concentration is high, the factor is low.
- concentration coefficient Fract
- concentration coefficient Fract
- the immunization method is a method using an antigen-antibody reaction, and the detection principle may be either an aggregation method or an aggregation prevention method, and an antibody or a carrier carrying an antigen may be used. Either a monoclonal antibody or a polyclonal antibody may be used, and the carrier used may be an artificial carrier material or a natural material as long as it is a commonly used material such as latex, colloidal gold, or gelatin particles.
- the change in absorbance in the agglutination method is that the agglutination reaction occurs and the absorbance increases in the presence of the measurement target substance. In the agglutination inhibition method, the agglutination reaction is inhibited in the presence of the measurement target substance.
- an increase or decrease in absorbance caused by a reaction utilizing an immunization method can be used as an absorbance change amount.
- the enzyme method uses an enzyme and a coloring reagent to measure an object to be measured, and detects the reaction by measuring the absorbance specific to the color developed as a result of the enzymatic reaction.
- the enzyme used is For example, it may be an enzyme (for example, proteinase, fructosyl peptide oxidase and peroxidase) that is usually used in the measurement for determining the ratio of HbA1c or glycoalbumin to total hemoglobin or total albumin, and is generally used as a substrate for peroxidase.
- Any commonly used color reagent for example, 4-AA, DMA, OPD, ADOS, TBHBA
- 4-AA, DMA, OPD, ADOS, TBHBA can be used.
- the absorbance change is an absorbance measurement value at an absorption wavelength specific to a reaction that occurs in an immunization method or an enzyme method used for measuring an object to be measured, for example, a single wavelength change amount ( ⁇ value), two Any of the difference (ratio of the main wavelength and the sub wavelength) and the ratio (absorbance ratio using the main wavelength as the numerator and the sub wavelength as the denominator, hereinafter referred to as the absorbance ratio or Ratio) may be used.
- the comparison target substance is a group of substances including the measurement target, for example, Hb for HbA1c, albumin for glycoalbumin, and all isozymes that perform the same catalytic reaction for a specific type of isozyme. Point to.
- the method for measuring the concentration of the comparison target substance may be any method that uses a change in absorbance caused by the reaction for measuring the comparison target substance.
- the absorbance specific to Hb for example, 420 to 430 nm, 540 nm, an absorption wavelength in the vicinity of 570 nm
- a method using a change in absorbance caused by a reaction by an immunization method for example, an aggregation method, an aggregation inhibition method
- Hb for example, a method is used in which a completely oxidized or reduced state is obtained by treatment with a surfactant, sodium azide, a cyanide compound, and the like, and a measured value of absorbance specific to the oxidized or reduced state is used.
- the classical method is the absorbance (color-specific absorption) using a dye-binding method (or protein error method).
- a method using a measured value of (wavelength) is used.
- the dye binding method is a method that utilizes a reaction in which, for example, bromcresol purple, bromcresol green, and pH indicator develop color depending on the presence of a protein regardless of pH change.
- the regression equation of the concentration coefficient cannot be obtained as a straight line connecting the two points, and the accuracy is low.
- the accuracy of the regression equation of the concentration coefficient obtained by the present invention is increased, it is not practical because labor is increased in the work for obtaining the amount of change in absorbance accordingly. Therefore, in order to carry out the present invention, it is preferable to prepare at least 3 types, more preferably 5 types or more, of dilution series of measurement target substances having different concentrations of comparison target substances.
- the concentration of the comparison target substance and the dilution series of the measurement target substance may be set according to the respective measurement ranges depending on the measurement target and the measurement system using the immunization method or the enzyme method.
- the inventors have conducted intensive studies and have completed the present invention by taking the following steps.
- dilution series of the measurement target substances were prepared at different concentrations of the comparison target substances, and the change in absorbance caused by the reaction using the immunization method or the enzyme method was determined for each.
- a calibration curve was prepared in which the x-axis was measured for each concentration of the comparison target substance and the dilution series of the measurement target substance was obtained, and the y-axis was plotted as the amount of change in absorbance.
- a calibration curve is obtained that takes a sigmoid curve that rises to the right for each concentration of the comparison target substance.
- each calibration curve tends to converge to one calibration curve. Can do.
- concentration a coefficient optimized for each calibration curve for each concentration of the comparison concentration target substance (hereinafter referred to as concentration) so that each calibration curve for each concentration of the comparison target substance converges to one calibration curve.
- concentration concentration of the comparison concentration target substance
- concentration concentration of the comparison target substance
- concentration concentration of the comparison target substance
- concentration concentration of the comparison target substance
- ratio of the measurement target substance to the comparison target substance concentration of the comparison target substance
- respective concentration coefficient obtained for each concentration of the comparison target substance.
- [X2] is the absorbance change amount [X]
- Ratio of target substance to be compared (%) [X] / (concentration coefficient x concentration of target substance) (1) Therefore, it is directly measured by obtaining the concentration of the comparison target substance, using the regression equation of the concentration coefficient obtained by the present invention and the formula (1), and measuring the change in absorbance of the measurement target substance. The ratio of the target substance to the comparison target substance can be obtained.
- FIG. 1A is a diagram showing an example of steps from immune reaction to absorbance measurement.
- an antigen as a sample is added in a state where the antibody is bound to the carrier shown in FIG. 1A (a)
- an antigen-antibody reaction occurs as shown in FIG. 1A (b).
- the absorbance measurement is performed as shown in FIG. 1A (c).
- HbA1c in a state where an immune aggregation reaction has occurred.
- concentration of HbA1c can be similarly determined.
- the figure shows an example in which two types of antibodies are carried on a carrier and reacts with one type of antigen, the antigens and antibodies may be reversed.
- FIG. 1B is a diagram schematically showing a technique for measuring the HbA1c concentration according to the first embodiment of the present invention
- FIG. 1C is a functional block diagram showing a configuration example of the measuring device for the HbA1c concentration.
- an HbA1c measurement reagent based on an agglutination reaction using a colloidal gold carrying an anti-HbA1c antibody and an anti-HbA0 antibody as a reagent for determining the ratio of HbA1c to the total Hb can be used.
- a specimen (blood) 1 containing HbA1c is mixed with an HbA1c measurement reagent 2 for causing a colloidal gold agglutination reaction with anti-HbA1c antibody and anti-HbA0 antibody.
- the HbA1c measuring reagent 2 includes a gold colloid 3 supporting an anti-HbA1c antibody and a gold colloid 5 supporting an anti-HbA0 antibody.
- Colloidal gold is known to be colored by surface plasmon resonance of colloidal particles, and the color tone is known to change due to changes in particle size. In agglomeration reactions using colloidal gold, this is used to generate aggregates 7. It can be observed and measured as a change in color tone of the reaction liquid (change from red to blue and finally gold), that is, a change in absorption spectrum with time.
- the HbA1c concentration measuring apparatus A As shown in FIG. 1C, the HbA1c concentration measuring apparatus A according to the present embodiment shown as an example is configured to control the light emitting unit 11, the reaction cell 15, the light receiving unit 21, the light emitting unit 11, and the light receiving unit 21. Part 23. Light emitted from the light emitting unit 11 is irradiated to the specimen 1, and the transmitted light is received by the light receiving unit 21. Based on the relationship between light emission and light reception controlled by the control unit 23, the optical characteristics of the specimen 1 can be evaluated. In this example, the light emitting unit 11 is provided with two LEDs 11a and 11b having different emission wavelengths. In FIG. 2 and subsequent figures, the spectroscopic analysis is performed, but it is preferable to use a simple apparatus as shown in FIG. 1C as an actual apparatus.
- the control unit 23 obtains the amount of change in absorbance of each of the dilution series of the measurement target substance having different concentrations of the comparison target substance and the dilution series of the measurement target substance generated by the reaction with the measurement reagent.
- the first processing unit 23a for obtaining the second processing unit 23b (see FIG. 12, etc.) for obtaining a regression equation representing the relationship between the concentration coefficient for each concentration of the comparison target substance and the concentration of the comparison target substance And have.
- the measurement apparatus should just be what can perform an absorbance measurement (spectral analysis apparatus), and a light source is not limited to LED or two specific wavelengths.
- FIG. 2 is a view showing an example of the result of measuring the absorption spectrum of the colloidal gold agglutination reaction carrying the antibody with a spectrophotometer.
- the horizontal axis represents wavelength and the vertical axis represents absorbance, and the analysis results (measurement results) for each elapsed time are shown.
- the wavelength around 525 nm is not limited to this wavelength as long as it falls within a wavelength range in which the absorbance decreases with the lapse of time of the colloidal gold agglutination reaction.
- the wavelength around 630 nm is not limited to this wavelength as long as it is within the wavelength range in which the absorbance rises with the lapse of time of the colloidal gold aggregation reaction.
- the amount of HbA1c can be determined based on this change in absorbance (at least one of decrease and increase).
- the change amount (absolute value) of the absorbance with time is very small, for example, the signal can be amplified using an amplifier or the like to accurately determine the absorbance change with time.
- a method using two wavelengths is also conceivable.
- FIG. 3 is a diagram obtained based on the data shown in FIG. 2.
- the ratio of absorbance at a wavelength of 525 nm to absorbance at a wavelength of 630 nm, absorbance 525 nm / absorbance 630 nm (hereinafter referred to as “absorbance ratio (Ratio)”). It is the figure which calculated
- required and showed the elapsed time dependence from reaction start time (time 0). As shown in FIG. 3, it can be seen that the decrease in absorbance with time (the rate of decrease in absorbance ratio (Ratio)) depends on the HbA1c concentration.
- the measurement wavelength is not limited to this wavelength as long as the wavelength near 525 nm is within the wavelength range in which the absorbance decreases with time-dependent change in the colloidal gold reaction.
- the wavelength around 630 nm is not limited to these wavelengths as long as it is within a wavelength range in which the absorbance increases with the lapse of time of the colloidal gold agglutination reaction.
- the ratio of HbA1c to be measured to the total Hb is defined as the ratio of stable ⁇ -chain monoglycated Hb (Hb in which one molecule of glucose is stably bound to the ⁇ chain of Hb) in the total Hb contained in erythrocytes. . Therefore, in order to calculate the ratio of HbA1c to the total Hb, it is also necessary to calculate the total Hb concentration as the denominator.
- FIG. 10 is a flowchart showing an example of processing according to this embodiment.
- step S1 As a pretreatment of the specimen, whole blood is hemolyzed (a process in which red blood cells are disrupted and Hb is eluted out of the blood cells) (step S1).
- the pretreatment liquid used for hemolysis is used as a diluent, and the absorbance at a wavelength of 405 nm is measured when measuring a calibrator with a known serially diluted Hb concentration (final concentration 0.5 to 2.5 mg / mL) (step) S2).
- Absorbance at 405 nm which is a characteristic absorption wavelength (near) of Hb, is plotted on the horizontal axis, and the known total Hb concentration is plotted on the vertical axis.
- FIG. 4 is a diagram showing the relationship between the total Hb concentration y and the absorbance x. From this correlation diagram, a calibration curve for measuring the total Hb concentration can be obtained.
- step S3 A calibration curve represented by the following formula and illustrated in FIG. 4 is obtained (step S3), and in this example, a cubic regression line is obtained.
- the total Hb concentration can be obtained from this calibration curve (step S4).
- the total Hb concentration can be measured by simple absorbance measurement.
- the quantitative measurement of HbA1c by antigen-antibody reaction is performed in a quantitative balance between the antigen and the antibody.
- the concentration of HbA1c that is, the absolute amount of HbA1c in the measurement reaction system
- the concentration of HbA1c also varies depending on the total Hb concentration, which is a variable value.
- the total Hb concentration is 0.5, 0.75, 1.0, 1.5, 2.0, 2.5 mg / mL, and the ratio of HbA1c to the total Hb is 3.7 to 15 Measurements were made using 3% specimens.
- FIG. 5 is a graph plotting the ratio of HbA1c to the total Hb 5 minutes after the start of the reaction and the absorbance change (change amount ⁇ ) at a wavelength of 525 nm.
- a dependence on the absolute amount of HbA1c in the measurement reaction system is recognized between the ratio of HbA1c to the total Hb and the change in absorbance. Since the change in absorbance depends on the absolute amount of HbA1c in the measurement reaction system, it can be seen that the change in absorbance varies depending on the total Hb concentration even in the ratio of the same HbA1c to the total Hb.
- the horizontal axis in FIG. 5 is the ratio of HbA1c to the total Hb, but as can be seen from FIG. 5, the change in absorbance (change amount ⁇ ) relative to the ratio of HbA1c to the total Hb is within a predetermined HbA1c range (6 in the figure). From about% to about 12%, it can be seen that it is almost proportional to the total Hb concentration.
- the ratio of HbA1c to the total Hb is determined (FIG. 10, step S5).
- the ratio of HbA1c to the total Hb depending on the change in absorbance (change amount ⁇ ) is obtained based on the calibration curve depending on the total Hb concentration as shown in FIG. Can do.
- step S5 of the first embodiment for solving the above-described problem will be described in detail.
- FIG. 5 is a graph plotting the HbA1c concentration 5 minutes after the start of the reaction and the absorbance change (change amount ⁇ ) at a wavelength of 525 nm, as described in the first embodiment.
- a relationship in which the change in absorbance depends on the ratio of HbA1c to total Hb is recognized. Since the change in absorbance (change amount ⁇ ) depends on the concentration of HbA1c (absolute amount of HbA1c in the measurement reaction system), even if the ratio of HbA1c is the same, the absorbance change may vary depending on the total Hb concentration. Recognize.
- FIG. 11A is a diagram following FIG.
- the horizontal axis in FIG. 5 is the ratio of HbA1c to the total Hb, but as can be seen in FIG. 5, the change in absorbance (change amount ⁇ ) relative to the ratio of HbA1c to the total Hb is almost proportional to the total Hb concentration.
- the Factor is 1.00 when the total Hb concentration is 1.50 mg / mL, and increases as the total Hb concentration decreases and decreases as the total Hb concentration increases.
- a density coefficient Factor was set (step S6).
- FIG. 7B is a diagram showing a regression curve of the total Hb concentration y and the concentration coefficient z, and can be represented by the following regression equation. In this example, a cubic regression equation is used.
- FIG. 8 is a diagram showing the relationship between [x 2 ] and absorbance change (change amount ⁇ ) using the concentration coefficient Factor shown in FIG. 7B. As shown in FIG. 8, it is possible to obtain the relationship between all ranges, and not dependent on the total Hb concentration [x 2] and the absorbance change (change amount delta) of [x 2].
- [X 2 ] is the total Hb concentration ⁇ the ratio of HbA1c to the total Hb ⁇ concentration coefficient (Factor), and can be said to be the ratio of the second HbA1c to the total Hb in consideration of the total Hb concentration and the concentration coefficient. .
- step S8 when the x axis and the y axis in FIG. 8 are interchanged, as shown in FIG. 9, the relationship between the change in absorbance (change amount ⁇ ) and [x 2 ] is made uniform without depending on the total Hb concentration. It can be obtained (step S8).
- concentration coefficient Factor depends on the reagent, it is preferable to newly obtain the relationship of FIG. 7B when using a reagent of a different lot.
- FIGS. 12 and 13 are flowcharts showing a processing example of S7 in FIG. 11A for obtaining the density coefficient Factor.
- step S7-1 the absorbance is measured for a dilution series (diluted sample) of HbA1c for each different total Hb concentration.
- step S7-2 the absorbance change (change amount ⁇ ) or the absorbance ratio (Ratio) described later in the third embodiment is obtained from the measured absorbance as the absorbance change for all dilution series.
- step S7-3 when all the concentration factors Factor of the different total Hb concentrations are fixed to arbitrary integers, [x 2 ] and the absorbance change amount, or R 2 of the absorbance ratio (Ratio) is obtained.
- step S7-4 the concentration factor Factor is optimized for each different total Hb concentration.
- step S7-5 an nth order regression equation of the total Hb concentration and the concentration factor Factor is created. This figure is, for example, FIG. 7B.
- step S7-4 the process of optimizing the concentration factor Factor for each different total Hb concentration in step S7-4 will be described below.
- Step S21-1 The concentration coefficient Factor at each concentration other than the total Hb concentration to be optimized is fixed to an arbitrary integer, and [x] and absorbance change (change amount ⁇ ) or absorbance at the total Hb concentration to be optimized determine the concentration factor factor which R 2 is maximized ratio (ratio).
- Step S21-2 Using the density coefficient Factor obtained at the density targeted for optimization in step S21-1, the density coefficient Factor for each remaining density excluding the density newly targeted for optimization is obtained in step S21-1.
- the value is fixed to an arbitrary integer used, and the concentration coefficient Factor that maximizes [x] and the absorbance change (change amount ⁇ ) or the absorbance ratio (Ratio) R 2 in the total Hb concentration to be optimized is obtained.
- Step S21-3 Using the Factors obtained at the respective densities to be optimized in Steps S21-1 and S21-2, the Factors at the remaining densities excluding the new density to be optimized are added to the Factors at Step S21-1. fixed to any integer which uses, to determine the concentration factor factor which R 2 becomes a maximum absorbance changes [x] in the total Hb concentration optimized (variation delta) or absorbance ratio (ratio).
- Step S21-4 and subsequent steps For each remaining concentration, in the same manner, [x] and the absorbance change (change amount ⁇ ) or absorbance ratio (Ratio) at each concentration using the concentration coefficient Factor obtained in the previous step. ) R 2 is to determine the concentration factor factor that maximizes the.
- Step S22-1 Using each concentration factor Factor obtained in the previous round as the concentration factor Factor at each concentration other than the total Hb concentration to be optimized, [x] and the change in absorbance (x) in the total Hb concentration to be optimized ( A concentration coefficient Factor that maximizes R 2 of the change amount ⁇ ) or the absorbance ratio (Ratio) is obtained.
- Step S22-2 The density coefficient Factor obtained in step S22-1 is used for the density to be optimized, and the density coefficient Factor for each remaining density excluding the density to be newly optimized is obtained one round before.
- each reference to a concentration factor factor was to determine the concentration coefficient factor which R 2 becomes a maximum in total Hb concentration optimized [x] and the absorbance change (change amount delta) or absorbance ratio (ratio).
- Step S22-3 Using the density coefficient Factor obtained at the respective densities targeted in Step S22-1 and Step S22-2, the density coefficient Factor at each remaining density excluding the density to be newly optimized is added. [X] and absorbance change (change amount ⁇ ) or R 2 of absorbance ratio (Ratio) are maximized at the total Hb concentration to be optimized using the respective concentration coefficients Factor at each concentration obtained one round before. A density coefficient Factor is obtained.
- step S23 as a final step, when the concentration coefficient Factor at each total Hb concentration becomes the same as the previous value, the factor optimization process ends.
- the optimization process of the concentration factor Factor is performed for each different total Hb concentration, and the relationship in which the concentration factor Factor depends on the Hb concentration as shown in FIG. 7B can be obtained. Note that even methods other than the optimization methods shown in FIGS. 12 and 13 can be used as long as the processing can optimize the concentration factor Factor for each different total Hb concentration.
- FIG. 11B is a flowchart subsequent to FIG. 11A, and is a flowchart diagram summarizing a procedure for calculating a measurement value.
- 3) Factor) is calculated from the total Hb concentration obtained in 1) (Step S11) and the regression equation (3) representing the relationship between the total Hb concentration and the concentration coefficient (calibration curve: total Hb concentration vs Factor) (Step S13). ). 4) Substituting each value into the above equation (4), the ratio of HbA1c to the total Hb is calculated (step S14).
- the ratio of HbA1c to the total Hb can be easily calculated from the absorbance measurement value. Can be sought.
- the ratio of the HbA1c to the total Hb vs. the amount of change in absorbance draws an independent curve for each total Hb concentration.
- the coefficient Factor dependent on the total Hb concentration is set, the total Hb Regardless of the concentration, the change in absorbance vs [X] converges to a single curve. Therefore, it is possible to measure the ratio of HbA1c to the total Hb without creating a comprehensive calibration curve for each total Hb concentration.
- a calibration curve for determining the concentration of HbA1c was determined using the absorbance ratio (absorbance 525 nm / absorbance 630 nm) as a variable as an index of absorbance change.
- FIG. 14 shows that the total Hb concentration is 0.5, 0.75, 1.0, 1.5, 2.0, 2.5 mg / mL, and the ratio of HbA1c to the total Hb is 3.7 to 15.3%.
- 5 is a graph plotting the ratio of HbA1c to the total Hb, and the ratio of absorbance at a wavelength of 525 nm and absorbance at a wavelength of 630 nm, that is, the absorbance ratio (Ratio), 5 minutes after the start of the measurement using the sample.
- the horizontal axis in FIG. 14 is the ratio of HbA1c to the total Hb, but as can be seen from FIG. 14, the absorbance ratio (Ratio) to the ratio of HbA1c to the total Hb is almost inversely proportional to the total Hb concentration.
- the factor becomes 1.00 when the total Hb concentration is 1.50 mg / mL, and increases as the total Hb concentration decreases, and decreases as the total Hb concentration increases.
- the density coefficient Factor was set (FIG. 11A, step S6).
- FIG. 16B is a diagram showing a regression curve of the total Hb concentration y and the concentration coefficient z, and can be represented by the following regression equation. In this example, a cubic regression equation is used.
- FIG. 17 is a diagram showing the relationship between [x 2 ] and the absorbance ratio Ratio using the concentration coefficient Factor shown in FIG. 16B. As shown in FIG. 17, it is possible to determine the relationship between the full range of [x 2], is independent on the total Hb concentration [x 2] and the absorbance ratio (Ratio).
- [X 2 ] is the total Hb concentration ⁇ the ratio of HbA1c to the total Hb ⁇ concentration coefficient (Factor), and can be said to be the ratio of the second HbA1c to the total Hb in consideration of the total Hb concentration and the concentration coefficient. .
- the absorbance ratio (Ratio) is used as a parameter as the absorbance change amount, even when the absorbance change amount is small, a calibration curve can be created by increasing the change amount. Further, the ratio of HbA1c to the total Hb can be measured with high accuracy. 1) The total Hb concentration is measured (calibration curve: absorbance 405 nm vs total Hb concentration) (FIG. 11B, step S11). 2) The absorbance ratio (Ratio) is measured as the amount of change in absorbance due to the colloidal gold reaction of the sample containing HbA1c (FIG. 11B, step S12). 3) Factor 1 is calculated from the total Hb concentration obtained in 1) (FIG.
- the ratio of HbA1c to the total Hb can be easily calculated from the absorbance measurement value. Can be sought.
- the ratio of the HbA1c to the total Hb vs. the amount of change in absorbance draws an independent curve for each total Hb concentration.
- the coefficient Factor dependent on the total Hb concentration is set, the total Hb Regardless of the concentration, the change in absorbance vs [X] converges to a single curve. Therefore, it is possible to measure the ratio of HbA1c to the total Hb without creating a comprehensive calibration curve for each total Hb concentration.
- FIG. 19 shows the results of measurement using specimens having total Hb concentrations of 1.0, 2.0, and 2.5 mg / mL and a ratio of HbA1c to total Hb of 5.7 to 15.3%. It is the graph which plotted the ratio with respect to the total Hb of HbA1c 5 minutes after reaction start, and the light absorbency change (change amount (DELTA)) in wavelength 525nm.
- DELTA change amount
- the horizontal axis in FIG. 19 is the ratio of HbA1c to the total Hb, but as can be seen in FIG. You can see that
- the factor becomes 1.00 when the total Hb concentration is 2.00 mg / mL, increases as the total Hb concentration decreases, and decreases as the total Hb concentration increases.
- the density coefficient Factor was set (FIG. 11A, step S6).
- FIG. 21B is a diagram showing a regression curve of the total Hb concentration y and the concentration coefficient z, and can be represented by the following regression equation. In this example, a quadratic regression equation is used.
- FIG. 22 is a diagram showing the relationship between [x 2 ] and absorbance change (change amount ⁇ ) using the concentration coefficient Factor shown in FIG. 21B. As shown in FIG. 22, it is possible to obtain the relationship between all ranges, and does not depend on the total Hb concentration [x 2] and the absorbance change (change amount delta) of [x 2].
- [X 2 ] is the total Hb concentration ⁇ the ratio of HbA1c to the total Hb ⁇ concentration coefficient (Factor), and can be said to be the ratio of the second HbA1c to the total Hb in consideration of the total Hb concentration and the concentration coefficient. .
- the ratio of HbA1c to total Hb can be easily determined.
- the total Hb concentration is measured (calibration curve: absorbance 405 nm vs total Hb concentration) (FIG. 11B, step S11).
- the change in absorbance of the sample containing HbA1c due to the colloidal gold agglutination reaction is measured (FIG. 11B, step S12).
- Factor 1 is calculated from the total Hb concentration obtained in 1) (FIG. 11B, step S11) and the regression equation (7) representing the relationship between the total Hb concentration and the concentration coefficient (calibration curve: total Hb concentration vs Factor). (FIG. 11B, step S13). 4) Substituting each value into the above equation (8), the ratio of HbA1c to the total Hb is calculated (FIG. 11B, step S14).
- the ratio of HbA1c to the total Hb vs. the amount of change in absorbance draws an independent curve for each total Hb concentration.
- the factor Factor dependent on the total Hb concentration is set, the total Hb Regardless of the concentration, the change in absorbance vs [X] converges to a single curve. Therefore, it is possible to measure the ratio of HbA1c to the total Hb without creating a comprehensive calibration curve for each total Hb concentration.
- Processing and control can be realized by software processing by CPU (Central Processing Unit) or GPU (Graphics Processing Unit), ASIC (Application Specific Integrated Circuit) or FPGA (Field Programmable Hardware) that can be realized by ProgrammableGardware.
- CPU Central Processing Unit
- GPU Graphics Processing Unit
- ASIC Application Specific Integrated Circuit
- FPGA Field Programmable Hardware
- Each component of the present invention can be arbitrarily selected, and an invention having a selected configuration is also included in the present invention.
- an apparatus in which the absorbance measurement unit and the control unit are integrated may be used.
- an individual (independent) device may be used.
- control unit may incorporate a regression equation obtained by a program for executing a method for obtaining a ratio of a measurement target substance to a comparison target substance or a method for obtaining a ratio of the measurement target substance to the comparison target substance.
- the program may be read from the outside of the apparatus and executed.
- an inspection terminal (inspection apparatus) having a light emitting unit 11, a reaction cell 15, and a light receiving unit 21 that can be carried in a portable form may be formed separately from the control unit. Then, the measurement value measured by the inspection terminal may be sent to the control unit 23 provided in the management center or the like by a wired or wireless communication unit (not shown), and the inspection result may be obtained on the management center side. Alternatively, the inspection result may be returned to the inspection terminal.
- the regression equation information changes for each production lot of the reagent built in the measurement (test) chip
- the regression equation information obtained in advance by the method of the present invention is stored in the measurement (test) chip. You may make it memorize
- a program for realizing the functions described in the present embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to execute processing of each unit. May be performed.
- the “computer system” here includes an OS and hardware such as peripheral devices.
- the present invention can be used as a method for obtaining a ratio to a comparison target substance such as HbA1c, glycoalbumin, or isozyme.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Hematology (AREA)
- Chemical & Material Sciences (AREA)
- Urology & Nephrology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Cell Biology (AREA)
- Biotechnology (AREA)
- Data Mining & Analysis (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mathematical Optimization (AREA)
- Theoretical Computer Science (AREA)
- Mathematical Physics (AREA)
- Computational Mathematics (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Analysis (AREA)
- Diabetes (AREA)
- Probability & Statistics with Applications (AREA)
- Operations Research (AREA)
- Inorganic Chemistry (AREA)
- Evolutionary Biology (AREA)
- Algebra (AREA)
- Bioinformatics & Computational Biology (AREA)
- Databases & Information Systems (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Abstract
Description
測定対象物質の比較対象物質に対する割合(%)=[X]/(濃度係数×比較対象物質の濃度) (1)
を得るステップと、比較対象物質の濃度毎の濃度係数と比較対象物質の濃度との関係をあらわす回帰式を求めるステップとを有する測定対象物質の比較対象物質に対する割合を求める方法が提供される。
したがって、比較対象物質の濃度を得ること、本発明により求めた濃度係数の回帰式と、式(1)とを用いること、及び、測定対象物質の吸光度変化量を測定することで、直接、測定対象物質の比較対象物質に対する割合を求めることができる。
(第1の実施の形態)
図1Aは、免疫反応~吸光度測定までの工程の一例を示す図である。図1A(a)に示す担体に抗体が結合している状態において、試料である抗原を添加すると、図1A(b)に示すように、抗原抗体反応が発生する。図1A(c)に示すように、免疫凝集反応が生じた状態で、図1A(d)に示すように吸光度測定を行う。このような一般的な抗原抗体反応と吸光度測定とを利用して、同様にHbA1cの濃度を求めることもできる。また、図では担体に2種類の抗体を担持させて、一種類の抗原と反応する例を示したが、抗原と抗体が逆であってもよい。
測定対象物質の比較対象物質に対する割合(%)=[X]/(濃度係数×比較対象物質の濃度) (1)
を得る第1処理部23a(図11B等参照)と、比較対象物質の濃度毎の濃度係数と比較対象物質の濃度との関係をあらわす回帰式を求める第2処理部23b(図12等参照)とを有する。
(溶血希釈後の総Hb濃度測定)
図10は、本実施の形態による処理の一例を示すフローチャート図である。
この検量線により、総Hb濃度を求めることができる(ステップS4)。
(HbA1cの定量測定)
総Hb濃度は、単純な吸光度測定により測定することが可能である。しかしながら、抗原抗体反応によるHbA1c定量測定は、抗原と抗体との量的バランスの中で行われる。また、上記のように、HbA1cの濃度(すなわち、測定反応系内のHbA1cの絶対量)は可変値である総Hb濃度によっても変動する。
(第2の実施の形態)
以下、本発明の第2の実施の形態について詳細に説明する。
この回帰式により、総Hb濃度から、その総Hb濃度における濃度係数を求めることができる。
1)総Hb濃度を測定する(検量線:吸光度405nm vs 総Hb濃度)(ステップS11)。
2)HbA1cを含む試料の金コロイド凝集反応による吸光度変化量(本実施の形態では吸光度変化(変化量Δ))を測定する(ステップS12)。
3)1)(ステップS11)で得られた総Hb濃度と、総Hb濃度と濃度係数の関係を表す回帰式(3)からFactorを算出する(検量線:総Hb濃度 vs Factor)(ステップS13)。
4)上記の式(4)に各値を代入し、HbA1cの総Hbに対する割合を算出する(ステップS14)。
(第3の実施の形態)
以下、本発明の第3の実施の形態について詳細に説明する。
この回帰式により、総Hb濃度から、その総Hb濃度における濃度係数を求めることができる。
1)総Hb濃度を測定する(検量線:吸光度405nm vs 総Hb濃度)(図11B、ステップS11)。
2)HbA1cを含む試料の金コロイド凝集反応による吸光度変化量として吸光度比(Ratio)を測定する(図11B、ステップS12)。
3)1)(図11B、ステップS11)で得られた総Hb濃度と、総Hb濃度と濃度係数の関係を表す回帰式(5)からFactorを算出する(検量線:総Hb濃度 vs Factor)(図11B、ステップS13)。
4)上記の式(6)に各値を代入し、HbA1cの総Hbに対する割合を算出する(図11B、ステップS14)。
(第4の実施の形態)
第2の実施の形態と同様に、本発明の第4の実施の形態では、吸光度の変化(変化量Δ)、例えば、波長525nm(図2参照)における吸光度の経時変化に基づく手法について説明する。但し、濃度の異なる測定対象物質の希釈系列を3種類とした例を示している。
この回帰式により、総Hb濃度から、その総Hb濃度における濃度係数を求めることができる。
1)総Hb濃度を測定する(検量線:吸光度405nm vs 総Hb濃度)(図11B、ステップS11)。
2)HbA1cを含む試料の金コロイド凝集反応による吸光度変化量(本実施の形態では吸光度変化(変化量Δ))を測定する(図11B、ステップS12)。
3)1)(図11B、ステップS11)で得られた総Hb濃度と、総Hb濃度と濃度係数の関係を表す回帰式(7)からFactorを算出する(検量線:総Hb濃度 vs Factor)(図11B、ステップS13)。
4)上記の式(8)に各値を代入し、HbA1cの総Hbに対する割合を算出する(図11B、ステップS14)。
Claims (10)
- 測定対象物質の測定試薬を用いた測定対象物質の比較対象物質に対する割合を求める方法であって、
比較対象物質の濃度が異なる測定対象物質の希釈系列と、前記測定試薬との反応が進行することで生じる前記測定対象物質の希釈系列それぞれの吸光度変化量を求めて得られる複数の検量線が、一つの検量線に収束するような濃度係数を比較対象物質の濃度毎に求める過程において、
測定対象物質の比較対象物質に対する割合(%)=[X]/(濃度係数×比較対象物質の濃度) (1)
を得るステップと、
比較対象物質の濃度毎の濃度係数と比較対象物質の濃度との関係をあらわす回帰式を求めるステップとを有する測定対象物質の比較対象物質に対する割合を求める方法。 - 前記吸光度変化量を求めるステップは、
測定対象物質を含む検体と前記測定試薬とによって生じる反応が進行することによって生じる特徴的な単波長における吸光度の増加或いは減少の変化量を求めるステップ、或いは、
測定対象物質を含む検体と前記測定試薬とによって生じる反応が進行することによって生じる特徴的な二波長における吸光度の増加或いは減少の変化量であって吸光度が増加する或いは減少する第1の波長における第1の吸光度と吸光度が増加する或いは減少する第2の波長における第2の吸光度との差或いは比を求めるステップを有する請求項1に記載の方法。 - 前記測定試薬が、免疫法の凝集法や凝集阻止法、或いは酵素法のいずれかを利用する測定試薬であって、
前記式(1)、及び、比較対象物質の濃度毎に最適化した濃度係数と比較対象物質の濃度との回帰式と、測定試薬を用いて測定対象物質を含む検体を測定して得る吸光度変化量から、測定対象物質の比較対象物質に対する割合を求めるステップを有する請求項1又は2のいずれか1項に記載の方法。 - コンピュータに、
請求項1から3までのいずれか1項に記載の方法を実行させるためのプログラム。 - 請求項4に記載のプログラムを記録するコンピュータ読み取り可能な記録媒体。
- 測定対象物質の測定試薬を用いた測定対象物質の比較対象物質に対する割合を求める装置であって、
請求項1から3までのいずれか1項に記載の方法を実行させるための制御部と、
吸光度測定部と、を有する装置であり、
制御部と吸光度測定部とは一体、或いは別体に設けられている装置。 - 請求項4に記載のプログラムを内蔵する制御部を有する装置。
- 請求項4に記載のプログラムを読み込む制御部を有する装置。
- 請求項1から3までのいずれか1項に記載の方法を実行して得られた回帰式を内蔵する制御部を有する装置。
- 請求項1から3までのいずれか1項に記載の方法を実行して得られた回帰式を読み込む制御部を有する装置。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020187032054A KR20190006955A (ko) | 2016-05-13 | 2017-05-10 | 측정 대상 물질의 비교 대상 물질에 대한 비율을 구하는 방법, 프로그램, 기억 매체 및 장치 |
| JP2017563631A JP6561144B2 (ja) | 2016-05-13 | 2017-05-10 | 測定対象物質の比較対象物質に対する割合を求める方法、プログラム、記憶媒体及び装置 |
| US16/301,291 US20200319167A1 (en) | 2016-05-13 | 2017-05-10 | Method for determining ratio of measurement object substance to comparison object substance, program, storage medium, and device |
| CN201780028173.6A CN109073646A (zh) | 2016-05-13 | 2017-05-10 | 求取待测物在对比物中所占比例的方法、程序、存储介质及装置 |
| EP17796197.6A EP3457136A4 (en) | 2016-05-13 | 2017-05-10 | METHOD FOR CALCULATING THE RELATIONSHIP OF MEASURING OBJECT SUBSTANCE TO COMPARATIVE OBJECT SUBSTANCE, PROGRAM, STORAGE MEDIUM AND DEVICE |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016096681 | 2016-05-13 | ||
| JP2016-096681 | 2016-05-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017195838A1 true WO2017195838A1 (ja) | 2017-11-16 |
Family
ID=60267086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2017/017734 Ceased WO2017195838A1 (ja) | 2016-05-13 | 2017-05-10 | 測定対象物質の比較対象物質に対する割合を求める方法、プログラム、記憶媒体及び装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20200319167A1 (ja) |
| EP (1) | EP3457136A4 (ja) |
| JP (1) | JP6561144B2 (ja) |
| KR (1) | KR20190006955A (ja) |
| CN (1) | CN109073646A (ja) |
| WO (1) | WO2017195838A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023531565A (ja) * | 2020-06-15 | 2023-07-24 | ノイオーム ペプチド プライベート リミテッド | 分析物検出用ラテラルフローアッセイ装置および分析物検出方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562337A (zh) * | 2019-02-13 | 2020-08-21 | 中国石油天然气股份有限公司 | 一种识别聚合物产品的方法以及系统 |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01237453A (ja) * | 1988-03-18 | 1989-09-21 | Hitachi Ltd | 試料分析方法及びこれを用いた自動分析装置 |
| JP2001204495A (ja) * | 2000-01-28 | 2001-07-31 | Asahi Kasei Corp | 糖化タンパク質割合測定方法 |
| WO2002006519A1 (en) * | 2000-07-14 | 2002-01-24 | Arkray, Inc. | Method of selectively determining glycated hemoglobin |
| JP2005261383A (ja) * | 2004-03-22 | 2005-09-29 | Asahi Kasei Pharma Kk | キャリブレーション方法 |
| JP2007003410A (ja) * | 2005-06-24 | 2007-01-11 | Sekisui Chem Co Ltd | ヘモグロビンA1cの測定方法及びヘモグロビンA1c測定用キット |
| JP2009531700A (ja) * | 2006-03-31 | 2009-09-03 | クオシェント ダイアグノスティックス リミテッド | 蛍光分析 |
| WO2011126067A1 (ja) * | 2010-04-09 | 2011-10-13 | 東洋紡績株式会社 | 糖化ヘモグロビンの測定方法 |
| WO2012173185A1 (ja) * | 2011-06-17 | 2012-12-20 | 協和メデックス株式会社 | 糖化ヘモグロビンの測定方法、測定試薬、及び、測定キット |
| WO2016071887A1 (en) * | 2014-11-07 | 2016-05-12 | Alifax S.R.L. | Method to measure glycated hemoglobin |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5465008A (en) | 1977-11-02 | 1979-05-25 | Hitachi Ltd | Television receiver with magnetic video recorder- reproducer |
| JPS55614A (en) | 1978-06-15 | 1980-01-07 | Nippon Columbia Co Ltd | Frequency characteristic adjustment circuit |
| JP2596322B2 (ja) | 1992-06-10 | 1997-04-02 | 富士レビオ株式会社 | 総ヘモグロビンに対する糖化ヘモグロビンの割合の測定方法 |
| US6043043A (en) * | 1993-04-02 | 2000-03-28 | Bayer Corporation | Method for the determination of hemoglobin adducts |
| CN101299027B (zh) * | 2001-12-27 | 2011-08-10 | 爱科来株式会社 | 浓度测定方法 |
| CN101915849B (zh) * | 2010-06-30 | 2013-06-05 | 深圳市国赛生物技术有限公司 | 一种方便加样的用于测定糖化血红蛋白百分比的检测试剂 |
| JP5900044B2 (ja) * | 2012-03-12 | 2016-04-06 | オムロンヘルスケア株式会社 | 糖尿病治療支援装置、糖尿病治療支援方法、糖尿病治療支援プログラム |
| CN102967568B (zh) * | 2012-11-23 | 2015-05-20 | 四川中自尾气净化有限公司 | 一种分光光度双波长检测方法 |
| EP3457141B1 (en) * | 2013-03-14 | 2021-09-29 | Ascensia Diabetes Care Holdings AG | Progressive approximation of sample analyte concentration |
| JP6305508B2 (ja) * | 2013-03-14 | 2018-04-04 | バイエル・ヘルスケア・エルエルシーBayer HealthCare LLC | 分析物濃度決定の正規化された較正 |
| JP6253560B2 (ja) * | 2014-10-01 | 2017-12-27 | 株式会社サインポスト | 糖尿病治療薬の有効性を判定する装置、プログラムおよび記録媒体 |
-
2017
- 2017-05-10 WO PCT/JP2017/017734 patent/WO2017195838A1/ja not_active Ceased
- 2017-05-10 EP EP17796197.6A patent/EP3457136A4/en not_active Withdrawn
- 2017-05-10 JP JP2017563631A patent/JP6561144B2/ja active Active
- 2017-05-10 CN CN201780028173.6A patent/CN109073646A/zh active Pending
- 2017-05-10 US US16/301,291 patent/US20200319167A1/en not_active Abandoned
- 2017-05-10 KR KR1020187032054A patent/KR20190006955A/ko not_active Ceased
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01237453A (ja) * | 1988-03-18 | 1989-09-21 | Hitachi Ltd | 試料分析方法及びこれを用いた自動分析装置 |
| JP2001204495A (ja) * | 2000-01-28 | 2001-07-31 | Asahi Kasei Corp | 糖化タンパク質割合測定方法 |
| WO2002006519A1 (en) * | 2000-07-14 | 2002-01-24 | Arkray, Inc. | Method of selectively determining glycated hemoglobin |
| JP2005261383A (ja) * | 2004-03-22 | 2005-09-29 | Asahi Kasei Pharma Kk | キャリブレーション方法 |
| JP2007003410A (ja) * | 2005-06-24 | 2007-01-11 | Sekisui Chem Co Ltd | ヘモグロビンA1cの測定方法及びヘモグロビンA1c測定用キット |
| JP2009531700A (ja) * | 2006-03-31 | 2009-09-03 | クオシェント ダイアグノスティックス リミテッド | 蛍光分析 |
| WO2011126067A1 (ja) * | 2010-04-09 | 2011-10-13 | 東洋紡績株式会社 | 糖化ヘモグロビンの測定方法 |
| WO2012173185A1 (ja) * | 2011-06-17 | 2012-12-20 | 協和メデックス株式会社 | 糖化ヘモグロビンの測定方法、測定試薬、及び、測定キット |
| WO2016071887A1 (en) * | 2014-11-07 | 2016-05-12 | Alifax S.R.L. | Method to measure glycated hemoglobin |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP3457136A4 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2023531565A (ja) * | 2020-06-15 | 2023-07-24 | ノイオーム ペプチド プライベート リミテッド | 分析物検出用ラテラルフローアッセイ装置および分析物検出方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20190006955A (ko) | 2019-01-21 |
| US20200319167A1 (en) | 2020-10-08 |
| CN109073646A (zh) | 2018-12-21 |
| JP6561144B2 (ja) | 2019-08-14 |
| EP3457136A1 (en) | 2019-03-20 |
| JPWO2017195838A1 (ja) | 2018-05-31 |
| EP3457136A4 (en) | 2020-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5829766B2 (ja) | 酵素法を利用したヘモグロビンA1c定量分析のための溶血試薬組成物 | |
| CN111057150B (zh) | 一种乳胶微球及其应用以及糖化血红蛋白检测试剂盒 | |
| CN103954776B (zh) | Ngal光激发化学发光检测试剂盒、其制备及使用方法 | |
| CN101918839A (zh) | sFlt-1:血管生成因子络合物的测定 | |
| CN101819208B (zh) | 一种纳米微球免疫比浊法检测脑钠肽试剂盒 | |
| AU2009243090B2 (en) | Hemoglobin based bilirubin reference material | |
| JP6561144B2 (ja) | 測定対象物質の比較対象物質に対する割合を求める方法、プログラム、記憶媒体及び装置 | |
| JP2007514954A (ja) | 安定化した基準溶液 | |
| US20210208152A1 (en) | Reagent composition for measuring glycated albumin and method for measuring glycated albumin using same | |
| Van Lente et al. | Evaluation of a nephelometric assay for haptoglobin and its clinical usefulness. | |
| CN109563535B (zh) | HbA1c的测定法 | |
| CN112014572A (zh) | 一种用于检测kl-6的乳胶颗粒制备方法及其应用 | |
| JP5395005B2 (ja) | 糖化タンパク質の測定方法 | |
| US8620590B2 (en) | Dose surface method for determination of analyte ratios | |
| US20210389307A1 (en) | Methods for detecting hook effect(s) associated with anaylte(s) of interest during or resulting from the conductance of diagnostic assay(s) | |
| JPWO2020059563A1 (ja) | 擬似便、およびこれを用いた便潜血検査の精度管理方法 | |
| Nechaeva et al. | Rapid Automatic Determination of Four Cardiomarkers in the Blood Plasma of Patients with Cardiopathologies | |
| CN113552372A (zh) | 一种用于saa检测的磁微粒化学发光免疫试剂盒及其制备方法 | |
| US20160313425A1 (en) | Micro magnetic resonance relaxometry | |
| EP3923806A1 (en) | Calibrators and controls for the determination of percent glycated hemoglobin in a patient's liquid test sample | |
| Tunakhun et al. | Development of gold nanoparticle-based lateral-flow strips for NGAL protein detection in urine samples | |
| CN105378483A (zh) | 用于直接对全血样品测量分析物的血浆浓度的方法 | |
| CN116930105A (zh) | 样本分析仪和样本分析方法 | |
| Van Lente et al. | Evaluationof a NephelometricAssayfor Haptoglobinand ItsClinical Usefulness | |
| CN118932013A (zh) | 一种氨基脲敏感性胺氧化酶特异性检测体系及试剂盒和检测方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ENP | Entry into the national phase |
Ref document number: 2017563631 Country of ref document: JP Kind code of ref document: A |
|
| ENP | Entry into the national phase |
Ref document number: 20187032054 Country of ref document: KR Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 17796197 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2017796197 Country of ref document: EP Effective date: 20181213 |