EP4065987A1 - Normierungsverfahren und normierungssystem für eine trockenblutmatrix - Google Patents
Normierungsverfahren und normierungssystem für eine trockenblutmatrixInfo
- Publication number
- EP4065987A1 EP4065987A1 EP20816447.5A EP20816447A EP4065987A1 EP 4065987 A1 EP4065987 A1 EP 4065987A1 EP 20816447 A EP20816447 A EP 20816447A EP 4065987 A1 EP4065987 A1 EP 4065987A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dry blood
- hemoglobin
- analyte
- concentration
- blood matrix
- 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.)
- Pending
Links
- 210000004369 blood Anatomy 0.000 title claims abstract description 110
- 239000008280 blood Substances 0.000 title claims abstract description 110
- 239000011159 matrix material Substances 0.000 title claims abstract description 76
- 238000010606 normalization Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 11
- 239000012491 analyte Substances 0.000 claims abstract description 57
- 238000005534 hematocrit Methods 0.000 claims abstract description 20
- 102000001554 Hemoglobins Human genes 0.000 claims description 72
- 108010054147 Hemoglobins Proteins 0.000 claims description 72
- 238000004445 quantitative analysis Methods 0.000 claims description 22
- 238000004458 analytical method Methods 0.000 claims description 17
- 108010033276 Peptide Fragments Proteins 0.000 claims description 16
- 102000007079 Peptide Fragments Human genes 0.000 claims description 16
- 238000011425 standardization method Methods 0.000 claims description 16
- 238000000605 extraction Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 11
- 239000012634 fragment Substances 0.000 claims description 8
- 102000035195 Peptidases Human genes 0.000 claims description 3
- 108091005804 Peptidases Proteins 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 235000019833 protease Nutrition 0.000 claims description 3
- 239000003960 organic solvent Substances 0.000 claims description 2
- 230000002255 enzymatic effect Effects 0.000 description 4
- 210000002381 plasma Anatomy 0.000 description 4
- 210000002966 serum Anatomy 0.000 description 4
- 239000012876 carrier material Substances 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000012062 aqueous buffer Substances 0.000 description 2
- 238000003776 cleavage reaction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007515 enzymatic degradation Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004949 mass spectrometry Methods 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000013519 translation Methods 0.000 description 2
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- 241000251539 Vertebrata <Metazoa> Species 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004159 blood analysis Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000002330 electrospray ionisation mass spectrometry Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002503 metabolic effect Effects 0.000 description 1
- 238000002552 multiple reaction monitoring Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
- G01N33/6803—General methods of protein analysis not limited to specific proteins or families of proteins
- G01N33/6848—Methods of protein analysis involving mass spectrometry
-
- 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
Definitions
- the present invention relates to a standardization method and a standardization system for a dry blood matrix for the standardized determination of at least one analyte in the dry blood matrix.
- Newborn screening has a special position in routine high-throughput analysis, since dry blood is used as the sample matrix for analysis. Analysis from dry blood is therefore particularly dependent on the fact that liquid blood is only available in very limited quantities in newborns. The dry blood analysis in newborn screening is currently carried out in combination with highly sensitive special analysis.
- the object of the present invention is to at least partially take into account the above-described problems.
- a normalization method for a dry blood matrix has the following steps:
- the standardization method according to the invention is universally applicable to a large number of clinically relevant analytes.
- the method can also be applied to species other than humans, in particular to all vertebrates.
- the analysis of dry blood as a sample matrix can be made available to the laboratory market in greater detail and more widely. Due to the flexible and fundamentally non-time-critical handling of dry blood matrices, logistics costs that have been incurred up to now can be greatly reduced.
- the first part of the dry blood matrix and / or the second part of the dry blood matrix can each be provided in the form of a dry blood spot by manual or automatic punching. That is, at least a first dry blood spot for the analyte and a second dry blood spot for the hemoglobin to be analyzed can be worked out, in particular punched out, from the dry blood matrix. The at least one first dry blood spot and the second dry blood spot are then preferably processed separately.
- analytes can be extracted from the at least one first dry blood spot or from the first part of the dry blood matrix, or one analyte can be extracted from several dry blood spots or corresponding parts of the dry blood matrix.
- the hemoglobin is preferably extracted by an aqueous buffer.
- a quantitative analysis is preferably to be understood as a quantitative determination and / or a corresponding measurement. That is, through the quantitative analysis of the at least one extracted analyte and the extracted hemoglobin, the amount of the respective substance is determined.
- the quantitative analysis of the hemoglobin is preferably carried out by mass spectrometry by means of enzymatic fragmentation.
- the quantitative analysis of the analyte and the hemoglobin can be carried out simultaneously or separately.
- the highly sensitive analysis is preferably carried out as part of an analysis using liquid chromatography-electrospray-mass spectrometry.
- hemoglobin and / or enzymatic fragments of the hemoglobin can also be detected by means of the MRM process (Multiple Reaction Monitoring).
- the proportion of the substance is determined from the respective part of the dry blood matrix.
- the hematocrit of the second part of the dry blood matrix can then be derived from the concentration of the hemoglobin.
- the derivation from the hemoglobin concentration is preferably carried out via a linear relationship between the hemoglobin concentration and the hematocrit.
- a calibration function can be used to determine the concentration of the at least one analyte and the hemoglobin, by means of which an area of the signals can be translated into a concentration.
- the hematocrit can be derived using a translation of the hemoglobin concentration into hematocrit.
- the hematocrit can according to the relationship can be calculated, where cHb is the hemoglobin concentration.
- the extraction of hemoglobin can be understood to mean the extraction of hemoglobin and / or hemoglobin fragments.
- determining the concentration of the hemoglobin can be understood to mean determining the concentration of the hemoglobin and / or determining the concentration of the hemoglobin fragments.
- hemoglobin can also be understood to mean hemoglobin fragments.
- the normalization factor can be calculated and / or determined on the basis of various test series by means of which an adapted mathematical relationship can be established empirically.
- At least one peptide fragment of the hemoglobin is analyzed quantitatively and then a concentration of the at least one peptide fragment in the second part of the dry blood matrix is determined, the concentration of the at least one peptide fragment being based on the concentration of hemoglobin in the second part of the dry blood matrix is closed.
- This is particularly advantageous when analyzing several analytes at the same time. That is, if several analytes are extracted from the dry blood matrix at the same time, specific peptide fragments of the hemoglobin can preferably be quantitatively determined simultaneously as part of the quantitative analysis of the hemoglobin.
- the quantitative analysis of the hemoglobin or of the at least one peptide fragment is carried out on the basis of a multiple selection of analyte-specific mass fragments generated in a mass spectrometer.
- This can be carried out in an advantageous manner using a quadrupole mass spectrometer as part of an MRM process. It has been found to be particularly efficient if the quantitative analysis of the hemoglobin or of the at least one peptide fragment is carried out on the basis of a double selection of analyte-specific mass fragments generated in a mass spectrometer.
- the quantitative analysis of the hemoglobin or of the at least one peptide fragment in a standardization method according to the invention is carried out on the basis of analyte-specific mass-over-charge signals, m / z.
- the hemoglobin and / or the at least one peptide fragment is advantageously selected by means of mass spectrometry not by mass alone, but by means of a mass / charge ratio. This enables particularly precise analysis results to be achieved.
- hemoglobin is enzymatically cleaved by adding a peptidase. This enabled meaningful analysis values to be generated, which form an advantageous basis for further development with regard to the desired standardization factor.
- a plasma-equivalent concentration of the at least one analyte is determined on the basis of the normalization factor.
- the plasma-equivalent concentration of the at least one analyte is to be understood as a concentration which is analogous to a conventional plasma and / or serum concentration of an analyte from a plasma and / or serum sample.
- the normalization factor determined can be used to normalize the analyte concentration in the dry blood sample and to calculate a concentration value analogous to the previously established plasma and / or serum concentration, ie a plasma-equivalent concentration.
- the corresponding hematocrit normalization of the analyte concentration enables quantitative analyzes from dry blood matrices and from liquid sample matrices to be directly compared with one another.
- a further advantage of the present invention arises if, in a normalization process, the at least one analyte is extracted from the dry blood matrix by means of an extraction liquid. This allows the analyte to be extracted from the dry blood matrix in a simple and reliable manner.
- the at least one analyte is preferably extracted from the dry blood matrix by means of rehydration.
- the at least one analyte can also be extracted from the dry blood matrix in an advantageous manner by means of electromagnetic radiation.
- the at least one extracted analyte can then be converted into a gas phase for further use, in particular for the subsequent quantitative analysis.
- a normalization system for a dry blood matrix comprises the following components: an extraction unit for extracting at least one analyte from a first part of the dry blood matrix and hemoglobin from a second part of the dry blood matrix, an analysis unit for quantitative analysis of the at least one extracted analyte and the extracted hemoglobin , a determination unit for determining a concentration of the at least one analyte in the first part of the dry blood matrix and a concentration of the hemoglobin in the second part of the dry blood matrix, a deriving unit for deriving a hematocrit of the second part of the dry blood matrix based on the concentration of the hemoglobin, and a computing unit for calculating a normalization factor based on the hematocrit determined to normalize a concentration of the at least one analyte in the first part of the dry blood matrix.
- a standardization system according to the invention thus has the same advantages as have been described in detail with reference to the
- FIG. 1 shows a flow chart for explaining a preferred embodiment of the present invention
- FIG. 2 is a block diagram to illustrate a standardization system according to the invention.
- Fig. 1 is a block diagram for explaining a normalization method for a dry blood matrix is shown.
- a dry blood matrix is first provided in a preparation step S1, from which a first dry blood spot for the extraction of the analyte and a second dry blood spot for the extraction of hemoglobin are punched out.
- a second step S2 the analyte is extracted from the first dry blood spot using an organic solvent and the hemoglobin is extracted from the second dry blood spot using an aqueous buffer.
- the extracted analyte and the extracted hemoglobin are then quantitatively analyzed as part of measurements in a third step S3 based on a two-time selection of analyte-specific mass fragments generated in a mass spectrometer. In other words, an absolute amount of the respective substance is determined in each case.
- peptide fragments of the hemoglobin are quantitatively analyzed and then a concentration of the peptide fragments in the second dry blood spot is determined, the concentration of the peptide fragments being used to infer the concentration of the hemoglobin in the second dry blood spot.
- the hemoglobin is enzymatically cleaved by adding a peptidase for the quantitative analysis of the hemoglobin.
- a concentration of the at least one analyte in the first dry blood spot and a concentration of the hemoglobin in the second dry blood spot are determined.
- a subsequent fifth step S5 the evaluation results are used to derive the hematocrit of the second dry blood spot based on the determined hemoglobin concentration, and a normalization factor is calculated using the hematocrit to normalize the concentration of the analyte.
- a plasma-equivalent concentration of the at least one analyte is also determined on the basis of the normalization factor.
- FIG. 2 shows a normalization system 10 for the dry blood matrix which is configured to carry out a normalization method as described above.
- the standardization system 10 has an extraction unit 11 for extracting at least one analyte from a first part of the dry blood matrix or the first dry blood spot and hemoglobin from a second part of the dry blood matrix or the second dry blood spot.
- the standardization system has an analysis unit 12 for quantitative analysis of the at least one extracted analyte and the extracted hemoglobin and a determination unit 13 for Determining a concentration of the at least one analyte in the first part of the dry blood matrix and a concentration of the hemoglobin in the second part of the dry blood matrix.
- the standardization system has a derivation unit 14 for deriving a hematocrit of the second part of the dry blood matrix based on the concentration of the hemoglobin and a computing unit 15 for calculating a standardization factor based on the determined hematocrit for normalizing a concentration of the at least one analyte in the first part of the dry blood matrix .
- the invention permits further design principles. In other words, the invention should not be viewed as being limited to the embodiment shown in the figures.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Hematology (AREA)
- Biomedical Technology (AREA)
- Chemical & Material Sciences (AREA)
- Urology & Nephrology (AREA)
- Immunology (AREA)
- Physics & Mathematics (AREA)
- Cell Biology (AREA)
- Analytical Chemistry (AREA)
- Pathology (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Microbiology (AREA)
- Bioinformatics & Computational Biology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Biophysics (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102019218593.2A DE102019218593B4 (de) | 2019-11-29 | 2019-11-29 | Normierungsverfahren und Normierungssystem für eine Trockenblutmatrix |
PCT/EP2020/083627 WO2021105357A1 (de) | 2019-11-29 | 2020-11-27 | Normierungsverfahren und normierungssystem für eine trockenblutmatrix |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4065987A1 true EP4065987A1 (de) | 2022-10-05 |
Family
ID=73646323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20816447.5A Pending EP4065987A1 (de) | 2019-11-29 | 2020-11-27 | Normierungsverfahren und normierungssystem für eine trockenblutmatrix |
Country Status (7)
Country | Link |
---|---|
US (1) | US20220412986A1 (de) |
EP (1) | EP4065987A1 (de) |
CN (1) | CN114729948A (de) |
AU (1) | AU2020392450A1 (de) |
CA (1) | CA3159730A1 (de) |
DE (1) | DE102019218593B4 (de) |
WO (1) | WO2021105357A1 (de) |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6040135A (en) | 1998-03-06 | 2000-03-21 | Biosafe Laboratories, Inc. | Method for correcting for blood volume in a serum analyte determination |
GR1004071B (el) * | 2001-12-17 | 2002-11-22 | Γεωργιος Ρεκλος | Συγχρονη αναλυση δειγματων αιματος και εκτιμηση περιεχομενου αιματος (αιμοσφαιρινη). |
WO2009152269A2 (en) * | 2008-06-11 | 2009-12-17 | Health Research, Inc. | Methods of quantifying biomarkers |
CN103954717A (zh) * | 2014-04-28 | 2014-07-30 | 重庆医科大学附属儿童医院 | 利用液相色谱串联质谱测定血红蛋白浓度的方法 |
CN105223290B (zh) * | 2015-09-24 | 2018-09-11 | 重庆医科大学附属儿童医院 | 一种测定血红蛋白α与β珠蛋白链比率的方法及应用 |
US10222324B1 (en) | 2015-10-05 | 2019-03-05 | Universiteit Gent | Dried blood sample analysis |
-
2019
- 2019-11-29 DE DE102019218593.2A patent/DE102019218593B4/de active Active
-
2020
- 2020-11-27 EP EP20816447.5A patent/EP4065987A1/de active Pending
- 2020-11-27 WO PCT/EP2020/083627 patent/WO2021105357A1/de unknown
- 2020-11-27 CA CA3159730A patent/CA3159730A1/en active Pending
- 2020-11-27 AU AU2020392450A patent/AU2020392450A1/en active Pending
- 2020-11-27 CN CN202080081281.1A patent/CN114729948A/zh active Pending
- 2020-11-27 US US17/780,980 patent/US20220412986A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
DE102019218593B4 (de) | 2021-09-23 |
CA3159730A1 (en) | 2021-06-03 |
DE102019218593A1 (de) | 2021-06-02 |
US20220412986A1 (en) | 2022-12-29 |
WO2021105357A1 (de) | 2021-06-03 |
AU2020392450A1 (en) | 2022-06-09 |
CN114729948A (zh) | 2022-07-08 |
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