EP1222464A1 - Diagnostic des pathologies des cellules mononuclees du sang - Google Patents
Diagnostic des pathologies des cellules mononuclees du sangInfo
- Publication number
- EP1222464A1 EP1222464A1 EP00967973A EP00967973A EP1222464A1 EP 1222464 A1 EP1222464 A1 EP 1222464A1 EP 00967973 A EP00967973 A EP 00967973A EP 00967973 A EP00967973 A EP 00967973A EP 1222464 A1 EP1222464 A1 EP 1222464A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- harp
- cells
- lymphocytes
- polypeptide
- derivative
- 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.)
- Withdrawn
Links
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
- G01N33/575—Immunoassay; Biospecific binding assay; Materials therefor for cancer
- G01N33/57505—Immunoassay; Biospecific binding assay; Materials therefor for cancer of the blood, e.g. leukaemia
-
- 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
- G01N33/569—Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses
- G01N33/56966—Animal cells
- G01N33/56972—White blood cells
-
- 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
- G01N2333/475—Assays involving growth factors
Definitions
- the present invention relates to a method using the growth factor HARP to detect certain mononucleic cells of the blood, and thus useful for the diagnosis of proliferative pathologies of this type of cells, such as for example chronic lymphoid leukemias.
- Lymphoproliferative syndromes include a set of diverse lymphoid pathologies characterized by an increase in the number of circulating lymphocytes or by morphological abnormalities of pathological lymphocytes.
- the possibility of specific therapies for certain types of lymphoproliferative syndromes imperatively requires a precise diagnosis that clinical examination or cytological study does not always allow. However, there are currently no specific immunological markers for the various lymphoproliferative syndromes.
- the diagnosis often remains difficult to make despite the efforts of recent years to arrive at a classification that can be used for all cases.
- the diagnostic approach is therefore based on the analysis of a set of markers, some of which have proven their relevance in discriminating between the two major classes of lymphoproliferative syndromes, chronic lymphoid leukemia (CLL) and non-Hodgkin's lymphoma (NHL). .
- CLL chronic lymphoid leukemia
- NHL non-Hodgkin's lymphoma
- markers are CD5, CD23, FMC7, CD22 and the surface munoglobulins.
- CLLs The characteristic immunological phenotyping of CLLs, many of which are indolent, (CD5 +, CD23 +, FMC7-, weak CD20, weak CD22, weak surface immunoglobulins (Igs)) distinguishes them from another CD5 + lymphoproliferative syndrome much more aggressive, coat NHL (CD5 +, CD23-, FMC7 +, CD20 strong, Igs strong).
- Hairy cell leukemia has the following typical phenotype: CD5-, strong CDllc, CD25 +, CD103 +, which differentiates it from other B lymphoid hemopathies CD5- as well as splenic NHL with villous lymphocytes, which is morphologically very close to it.
- an unusual immunophenotype may be associated with trisomy 12 or mixed cell morphology (1).
- angiogenic growth factors are known in the prior art, such as the factors HARP, MK, FGF-1, FGF-2, VEGF, HIV-tat, HIV2-tat, HGF, HB-EGF or even angiogenin.
- HARP Heparin Affin Regulatory Peptide
- PTN Pleiotrophin
- HB-GAM heparin binding-gro th associated molecule
- the growth factor HARP is a polypeptide of 168 amino acids containing a hydrophobic N-terminal motif of 32 amino acids corresponding to a signal peptide.
- HARP is a protein secreted from 136 (in its short form) or 139 (in its long form) amino acids whose apparent molecular weight, determined in SDS-PAGE under reducing conditions, is 18 kDa.
- HARP was originally isolated from the brains of newborn rats as a molecule inducing neuritic growth in vitro (5) suggesting that this polypeptide is involved in the maturation of neuronal cells (6).
- HARP is able to stimulate the growth of fibroblastic, epithelial and endothelial cells in vi tro (8) (9). This mitogenic activity has since been confirmed by the use of recombinant proteins produced from eukaryotic expression systems.
- HARP also induces in vitro the formation of pseudo-capillaries (10). In vivo, in different tissue models, the localization of HARP is notably associated with the endothelial cells of the blood capillaries (11).
- HARP data suggest that this polypeptide plays a role in the complex mechanisms involved in angiogenesis and neoangiogenesis. tumor.
- a great deal of research has been carried out in this direction in order to determine the involvement of HARP in tumor progression, in particular in hormone-dependent tumors such as the breast or the prostate.
- Studies relating to the biological properties of HARP have been carried out by numerous laboratories (4) and despite controversial results, it appears to be accepted that HARP, like MK, is involved in the control of cell proliferation (4) (9) (12).
- the purified recombinant human HARP protein hrHARP
- HARP is therefore known and used for its angiogenic and neurotrophic properties.
- mRNA corresponding to the HARP protein has been observed by the inventors in cells of blood vessels, both in endothelial cells and in smooth muscle cells, but also in smooth muscle cells of human mammary glands ( 11).
- HARP is an angiogenic growth factor and that it is synthesized and localized in vascular endothelial cells has led the inventors to work on a potential function of HARP on blood cells. They therefore investigated whether HARP could bind to these blood cells, in particular the newly isolated human peripheral blood mononuclear cells (PBMC).
- PBMC peripheral blood mononuclear cells
- the inventors have been able to show that HARP binds specifically to B cells characterized by the presence of the CD19 marker. The presence of HARP binding sites on circulating cells has never been described until now.
- HARP receptors are very little known.
- Kd 600pM
- HARP binding sites have also been found in several cell types, including rat kidney cells, human mammary adenocarcinoma cells, human epidermal carcinoma cells, human hepatocarcinoma cells, neuroblasts mouse, and pheochromocytoma cells.
- the growth factor HARP a molecule known as an angiogenic and neurogenic factor, stimulates the production of cytokines of inflammation (IL1, IL6, IL8, IFN gamma and TNF alpha) and increases the incorporation of tritiated thymidine.
- IL1, IL6, IL8, IFN gamma and TNF alpha cytokines of inflammation
- TNF alpha TNF alpha
- HARP is able to bind specifically to B lymphocyte cells and thus allows the diagnosis of pathologies in which these cells are involved, and in which the number of B lymphocytes is considerably increased, such as chronic lymphoid leukemias. .
- the invention therefore relates to a method for detecting B lymphocytes comprising the following steps:
- a blood sample can be taken from healthy subjects or from subjects suffering from proliferative pathologies of the mononuclear blood cells. This sample is brought into contact with the HARP polypeptide under conditions favoring the peptide binding reaction.
- the blood sample can be brought into contact with: the HARP polypeptide, ie a protein whose amino acid sequence corresponds to the amino acid sequence given in the literature ( 3, 5, 8),
- HARP fragment either a protein or a peptide capable of binding to B lymphocytes and whose amino acid sequence corresponds to a part of the amino acid sequence represented in the annex under the number SEQ ID No. 1.
- HARP derivative that is to say a peptide or a polypeptide capable of binding to B lymphocytes and whose amino acid sequence is close to the amino acid sequence identified in the appendix under the number SEQ ID No. 1 .
- the term “HARP derivative” also means a protein capable of binding to B lymphocytes and comprising part or all of the amino acid sequence corresponding to the amino acid sequence represented in the appendix under the associated SEQ ID No. 1 number. to another element of protein or non-protein nature.
- this element allows the detection of the binding of the HARP derivative on the B lymphocytes.
- This element can for example be a radioactive element, an amino acid sequence coding for an enzyme of which a chromogenic substrate can also be added in the medium. of reaction.
- Another possibility is, for example, the covalent association of biotin with HARP, allowing the revelation of the HARP - B lymphocyte interaction by the addition of streptavidin.
- the method according to the invention can be applied by bringing the HARP polypeptide, a fragment or a derivative of HARP into contact with a whole blood sample.
- a step during which the mononuclear blood cells are separated from the whole blood sample is carried out before the cells are brought into contact with the HARP polypeptide, a fragment or a derivative of HARP. .
- the method according to the invention can be carried out in such a way that the binding to the surface of the mononucleic cells of the blood of the HARP polypeptide, of a fragment or of a derivative of HARP, is directly detected.
- Direct detection of the binding of HARP, a fragment or a derivative of HARP can be carried out using, for example, the radioactively labeled HARP polypeptide. It is also possible to use the HARP polypeptide coupled to an enzyme or to biotin, and in this case the binding of HARP to B lymphocytes will be detected by the addition of a corresponding chromogenic substrate or of streptavidin. It is also possible to react a blood sample with the HARP polypeptide, a fragment or derivative of HARP, then a fluorescent antibody specifically recognizing the HARP polypeptide, the fragment or the derivative of HARP used in the reaction. The binding of the anti-HARP antibody to the cells can then be detected by flow cytofluorimetry. The method according to the invention can be carried out in such a way that the binding to the surface of the mononucleic cells of the blood of the HARP polypeptide, of a fragment or of a derivative of HARP, is detected indirectly.
- a blood sample is brought into contact with the HARP polypeptide, a fragment or a derivative of HARP, then is added an antibody specifically binding the HARP polypeptide, a fragment or derivative of HARP, finally a fluorescent antibody specifically binding the first antibody is added.
- the binding of the anti-antibody to the cells can then be detected by flow cytofluorimetry.
- the subject of the invention is in particular a method for diagnosing proliferative pathologies of mononuclear blood cells.
- This method is characterized in that one detects B lymphocytes in a blood sample of a patient then in that one measures the rate of fixation of HARP on B lymphocytes and one compares this rate with a value control obtained in a healthy subject, so as to associate an increase in binding of HARP with an increase in B lymphocytes and with a proliferative pathology of the mononuclear blood cells.
- the factor HARP is advantageously used for the diagnosis of proliferative pathologies of the mononuclear cells of the blood, like the chronic lymphoid leukemias.
- Another aspect of the invention relates to an element of the mononuclear blood cells allowing the fixation of the HARP factor on said cells.
- This element can in particular be a receptor binding, exclusively or not exclusively, the HARP factor.
- FIG. 1 represents the binding of HARP to PBMCs originating from healthy individuals or suffering from chronic lymphoid leukemia.
- the black bars correspond to cells from healthy blood donors, the white bars correspond to cells from patients with chronic lymphocytic leukemia.
- FIG. 2 represents the conditioned biparametric fluorescence histograms, obtained using a flow cytometer on the acquisition window for lymphocytes of normal subjects, obtained from a cytogram representing the cell size as a function of the structure cellular.
- a double CD19-PE marking on the ordinate against HARP-FITC on the abscissa in the absence of hrHARP.
- b double marking CD2-PC5 in ordinates against
- HARP-FITC on the abscissa in the absence of hrHARP.
- c double CD19-PE marking on the ordinate against HARP-FITC on the abscissa in the presence of hrHARP.
- d double marking CD2-PC5 on the ordinate against HARP-FITC on the abscissa in the presence of hr HARP.
- FIG. 3 represents fluorescence histograms conditioned on lymphoid cells malignant (LLC): in the absence of recombinant human HARP (hrHARP) (fig.3a) and in the presence of hrHARP (fig.3b).
- Example 1 Use of HARP as a marker for lymphocytes in patients with chronic lymphocytic leukemia.
- the mononuclear cells were isolated from the peripheral blood of normal subjects, blood donors, or of subjects carrying various hemopathies: 30 subjects suffering from CLL, 6 suffering from NHL B, 4 suffering from Sézary's diseases, 2 suffering from acute leukemias myeloids (LAM2 and LAM3) and 1 with chronic myeloid leukemia (CML).
- the blood was taken from a Vacutainer tube containing EDTA.
- the mononuclear cells were separated by Ficoll gradient, counted and adjusted to 10 6 cells per ml.
- the HARP growth factor used was the recombinant human protein HARP (hrHARP) of 139 amino acids, supplied by the CRRET laboratory (ESA CNRS 7053) at Cruteil united Paris 12 (France).
- the anti-HARP (goat anti-HARP human immunoglobulin) antibody comes from the company R&D Systems Minneapolis (Minesota USA) was used at the final dilution of 1/250.
- An anti goat IgG antibody coupled to FITC from Caltag, Burlingame, CA, USA
- the anti-HARP was replaced by goat serum (from the company Jackson, West Grove, PE, USA).
- CD19-PE CD2-PC5, CD10-FITC, CD45Ra-FITC, CD45Ro-FITC, CD4-PE, CD8-ECD, CD3- FITC, CD16 / 56-PE , CD25-FITC (all of these antibodies are from Beckman Coulter-Immunotech, Hialeah, FL, USA).
- the mononuclear cells were previously incubated with recombinant HARP (hrHARP) at a concentration of 1 ⁇ g / ml for 1 h at room temperature, then washed, before being labeled according to the previous technique.
- hrHARP recombinant HARP
- the effect of hrHARP on normal mononuclear cells after 5 days of culture was studied in a humid atmosphere at 37 ° C. enriched with 5% CO 2, in the absence and in the presence of 1 ⁇ g / ml of hrHARP.
- the cells were labeled with anti-CD19, CD2, CD4, CD8 monoclonal antibodies as well as with anti-HARP.
- the cytofluorimeter reading was performed using a 488 nm laser beam.
- An acquisition window was drawn around the lymphocytes on a biparametric histogram representing the cell size according to a linear mode as a function of the logarithm of the particle size. Histograms representing the intensity of fluorescence in logarithmic mode as a function of the number of cells were thus obtained from this selected population of cells. Results were acquired in percentages of cells
- Pleiotrophin stimulates fibroblasts and endothelial and epithelial cells and is expressed in human cancer. J. Biol. Chem. 267: 25889).
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Immunology (AREA)
- Engineering & Computer Science (AREA)
- Hematology (AREA)
- Urology & Nephrology (AREA)
- Biomedical Technology (AREA)
- Cell Biology (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Food Science & Technology (AREA)
- General Health & Medical Sciences (AREA)
- Biotechnology (AREA)
- Medicinal Chemistry (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Microbiology (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Zoology (AREA)
- Tropical Medicine & Parasitology (AREA)
- Virology (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9912715 | 1999-10-12 | ||
| FR9912715A FR2799549B1 (fr) | 1999-10-12 | 1999-10-12 | Procede de diagnostic des pathologies proliferatives des cellules mononucleees du sang |
| PCT/FR2000/002788 WO2001027629A1 (fr) | 1999-10-12 | 2000-10-06 | Diagnostic des pathologies des cellules mononucleees du sang |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1222464A1 true EP1222464A1 (fr) | 2002-07-17 |
Family
ID=9550839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00967973A Withdrawn EP1222464A1 (fr) | 1999-10-12 | 2000-10-06 | Diagnostic des pathologies des cellules mononuclees du sang |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US20020172983A1 (fr) |
| EP (1) | EP1222464A1 (fr) |
| JP (1) | JP2003515102A (fr) |
| AU (1) | AU7795600A (fr) |
| CA (1) | CA2387560A1 (fr) |
| FR (1) | FR2799549B1 (fr) |
| WO (1) | WO2001027629A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006020684A2 (fr) | 2004-08-10 | 2006-02-23 | Institute For Multiple Myeloma And Bone Cancer Research | Procedes pour reguler la differenciation et traiter le myelome multiple |
| FR2879702A1 (fr) | 2004-12-17 | 2006-06-23 | Renault Sas | Systeme d'embrayage humide multiple a flasque d'entrainement integrant une cible emettrice de signaux representatifs de la vitesse de rotation dudit flasque |
| FR2957799B1 (fr) * | 2010-03-26 | 2012-08-17 | Inst Des Vaisseaux Et Du Sang | Compositions proangiogeniques, leur procede de preparation et leurs utilisations |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5773252A (en) * | 1995-06-05 | 1998-06-30 | Human Genome Sciences, Inc. | Fibroblast growth factor 15 |
-
1999
- 1999-10-12 FR FR9912715A patent/FR2799549B1/fr not_active Expired - Fee Related
-
2000
- 2000-10-06 EP EP00967973A patent/EP1222464A1/fr not_active Withdrawn
- 2000-10-06 CA CA002387560A patent/CA2387560A1/fr not_active Abandoned
- 2000-10-06 WO PCT/FR2000/002788 patent/WO2001027629A1/fr not_active Ceased
- 2000-10-06 AU AU77956/00A patent/AU7795600A/en not_active Abandoned
- 2000-10-06 JP JP2001530588A patent/JP2003515102A/ja not_active Withdrawn
-
2002
- 2002-04-04 US US10/116,076 patent/US20020172983A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0127629A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| US20020172983A1 (en) | 2002-11-21 |
| JP2003515102A (ja) | 2003-04-22 |
| FR2799549B1 (fr) | 2001-11-30 |
| CA2387560A1 (fr) | 2001-04-19 |
| AU7795600A (en) | 2001-04-23 |
| WO2001027629A1 (fr) | 2001-04-19 |
| FR2799549A1 (fr) | 2001-04-13 |
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| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: COURTY, JOSE Inventor name: ACHOUR, AMMAR Inventor name: BAUDOUIN, FRANCOISE Inventor name: BARRITAULT, DENIS |
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