EP4028554A1 - Verfahren zum nachweis der veranlagung zur ausbildung von blutkrebs - Google Patents
Verfahren zum nachweis der veranlagung zur ausbildung von blutkrebsInfo
- Publication number
- EP4028554A1 EP4028554A1 EP19782476.6A EP19782476A EP4028554A1 EP 4028554 A1 EP4028554 A1 EP 4028554A1 EP 19782476 A EP19782476 A EP 19782476A EP 4028554 A1 EP4028554 A1 EP 4028554A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- dna sequence
- allele
- predisposition
- blood
- blood cancer
- 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
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- RGWHQCVHVJXOKC-SHYZEUOFSA-J dCTP(4-) Chemical compound O=C1N=C(N)C=CN1[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O)[C@@H](O)C1 RGWHQCVHVJXOKC-SHYZEUOFSA-J 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6883—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material
- C12Q1/6886—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material for cancer
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/118—Prognosis of disease development
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/158—Expression markers
Definitions
- Malignant B-cell neoplasms are generally used to describe malignant diseases of the blood-forming or lymphatic system. They include clinical pictures such as leukemia and, in a broader sense, are cancer diseases.
- Leukemia is characterized by the increased formation of non-functional precursor cells of the white blood cells, which are also called leukemia cells. These cells spread in the bone marrow, suppress the usual blood formation there and, as a rule, also accumulate to a large extent in the peripheral blood. They can infiltrate the liver, spleen, lymph nodes and other organs and thereby impair their function.
- the disruption of blood formation leads to a reduction in the normal blood components, which can lead to anemia due to a lack of oxygen-carrying red blood cells, a lack of blood platelets that stop bleeding, and a lack of mature, functional white blood cells.
- Acute leukemias are life-threatening diseases which, if left untreated, can lead to death within a few weeks to months.
- Chronic leukemia usually lasts for several years and is often asymptomatic in the early stages.
- the main types of leukemia are:
- AML acute myeloid leukemia
- CML chronic myeloid leukemia
- ALL acute lymphoblastic leukemia
- CLL chronic lymphocytic leukemia
- the object of the invention is to provide a method for determining a hereditary CLL disease risk.
- This mutation is not expected in genomic analyzes either in healthy volunteers or in patients outside the B cell with the one Frequency found. In practice, the mutation is hardly found at all. In patients with CLL, however, it occurs at an unexpected frequency of around 10-15% in the CLL cells, but not in other body cells or non-malignant B cells.
- the mutation (R110) enables a dimerization of the BCR, which leads to an autonomous activation of the receptor (ie a ligand that dimerizes these receptors by crosslinking is no longer necessary).
- This allele 01 codes for the following amino acid sequence:
- the increased (somatic) mutation frequency is explained by the genetic rearrangement that takes place during the development and maturation of the BCR.
- a person with the risk allele has an increased risk of developing CLL.
- regular preventive medical examinations can significantly reduce the risk of the disease, especially since antibodies against this mutated epitope of the BCR are available.
- Such a preventive examination can take place, for example, with an antibody that binds to the R110 mutation of the BCR.
- Such an antibody and its use is described in EP18162666.4.
- Such tests can be carried out inexpensively from small amounts of blood by means of flow cytometry.
- Another possibility is to use real-time PCR to detect the mutation in DNA or mRNA that was obtained from But or from cell fractions from blood.
- VL3-21 The genomic presence of VL3-21 can be detected directly from the DNA via sequencing (eg whole genome sequencing, PCR or other methods). An analysis of whether VL2-21-01 is homozygous or heterozygous is not necessary, but can be carried out as a control (by detecting the other VL3-21 alleles). There are companies that offer genome analysis services (e.g. 23andme). A service offered by such a company would also fall under the invention described here. If the alleles are to be detected by PCR, it is possible to use a probe for real-time PCR analyzes that detects the risk allele and / or several probes that detect the other alleles. The alleles * 02 and * 03 can be detected with a probe.
- Secondary prevention measures which consist of screening and preventive examinations, can be, for example, regular blood tests to determine the lymphocyte count or antibody-based analyzes to find the mutated cells.
- a real-time PCR test which records the genetic differences between the alleles, is sufficient to determine the alleles of IGLV3-21.
- a probe is suitable for this, which comprises the regions 129-157 of the IGLV3-21 gene: IGLV3-21 * 01 probe: TGTGCTGGTCATCTATTATGATAGCGACC (SEQ ID 02)
- IGLV3-21 * 02/03 probe TGTGCTGGTCGTCTATGATGATAGCGACC (SEQ ID 03)
- IGLV3-21 RW198 AGAGTTGGAGCCAGAGAATC (SEQ ID 05)
- the probes are modified at their 5 'end with a reporter dye and at the 3' end with a quencher.
- the IGLV3-21 * 01 probe is labeled with the dye FAM
- the IGLV3-21 * 02/03 probe is labeled with the dye TAMRA.
- the quenchers are selected to match the dyes (BHQ-1 for FAM and BHQ-2 for TAMRA) -
- These modified DNA probes can be obtained with the dyes / quenchers from biomers.net in Ulm.
- extracted genomic DNA e.g. from blood, saliva or other tissues
- primers and probes For the detection, extracted genomic DNA (e.g. from blood, saliva or other tissues) is analyzed using the primers and probes.
- the evaluation is based on the CT values of the individual color channels, with CT values below 32 ( ⁇ 32) being interpreted as a positive signal for the allele. If fewer copies of genomic DNA are used, the limits of the CT values can be lower.
- a small amount of peripheral blood was drawn from a patient.
- 100 ml of blood were transferred to a reaction vessel and made up with 2 ml of PBS-BSA buffer solution.
- the sample was then centrifuged in an Eppendorf centrifuge 5804 at 1500 rpm for a period of five minutes. The supernatant was discarded and the sediment was mixed well.
- the antibody was then added.
- the following surface parameters were used for staining: 1) CD19-FITC, 2) CD5-PE, and 3) der CLL SubSet-2 specific antibodies (APC) before incubating the mixtures for 15 minutes at room temperature in the dark. Lysis was then initiated and the erythrocytes were lysed. As previously described, it was washed twice with PBS-BSA buffer solution, and the cells were dissolved in 500 ml of 0.1% PBS-BSA
- Buffer solution taken up and resuspended.
- the cells were stored in the dark at 2-8 ° C. until the measurement on the flow cytometer.
- the analysis at the FACS was carried out on a BDCalibur.
- the individual laser and detection parameters were set according to the instructions of the device manufacturer and are well known to those skilled in the art.
- the raw data from the analysis were then evaluated using FlowJo analysis software. First, the lymphocyte population was im
- FSC / SSC blot selected and marked. For this selection, the focus was then on the CD19-positive B cells and analyzed for the binding of the subset-2-specific antibody.
- Figure 1 shows such an analysis using the example of the use of the subset-2-specific antibody.
- the CD19 positive B cells were selected for further analysis (left panel). These were then examined for the binding of the specific antibody (right panel).
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Zoology (AREA)
- Genetics & Genomics (AREA)
- Wood Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Biotechnology (AREA)
- Microbiology (AREA)
- Molecular Biology (AREA)
- Hospice & Palliative Care (AREA)
- Biophysics (AREA)
- Oncology (AREA)
- Biochemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2019/074120 WO2021047764A1 (de) | 2019-09-10 | 2019-09-10 | Verfahren zum nachweis der veranlagung zur ausbildung von blutkrebs |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4028554A1 true EP4028554A1 (de) | 2022-07-20 |
Family
ID=68136324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19782476.6A Pending EP4028554A1 (de) | 2019-09-10 | 2019-09-10 | Verfahren zum nachweis der veranlagung zur ausbildung von blutkrebs |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20220340978A1 (de) |
| EP (1) | EP4028554A1 (de) |
| JP (1) | JP7502418B2 (de) |
| KR (1) | KR20220054325A (de) |
| CN (1) | CN114391044A (de) |
| CA (1) | CA3152031A1 (de) |
| WO (1) | WO2021047764A1 (de) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2742969A1 (en) * | 2008-11-07 | 2010-05-14 | Fabrus Llc | Anti-dll4 antibodies and uses thereof |
| WO2012171007A2 (en) * | 2011-06-09 | 2012-12-13 | University Of Florida Research Foundation, Inc. | Methods for treating or preventing graft versus host disease |
-
2019
- 2019-09-10 WO PCT/EP2019/074120 patent/WO2021047764A1/de not_active Ceased
- 2019-09-10 JP JP2022515764A patent/JP7502418B2/ja active Active
- 2019-09-10 US US17/641,605 patent/US20220340978A1/en active Pending
- 2019-09-10 EP EP19782476.6A patent/EP4028554A1/de active Pending
- 2019-09-10 KR KR1020227008180A patent/KR20220054325A/ko active Pending
- 2019-09-10 CA CA3152031A patent/CA3152031A1/en active Pending
- 2019-09-10 CN CN201980100133.7A patent/CN114391044A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CA3152031A1 (en) | 2021-03-18 |
| JP7502418B2 (ja) | 2024-06-18 |
| US20220340978A1 (en) | 2022-10-27 |
| CN114391044A (zh) | 2022-04-22 |
| JP2022552612A (ja) | 2022-12-19 |
| KR20220054325A (ko) | 2022-05-02 |
| WO2021047764A1 (de) | 2021-03-18 |
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