Myeloma Clinical Trial
Official title:
Prognostic Study of Markers of Angiogenesis and Coagulability in Patients With Monoclonal Gammopathy
Blood circulating endothelial cells (CEC) and microparticles (MPs) are described in the literature to be associated with vascular failures and dysfunction that reflect neo-angiogenesis and risk of thrombosis, respectively. There a few number of CEC in healthy patients although they significantly increase in several cancers including myeloma. However, no study explored to date a correlation of CEC and/or circulating endothelial progenitors (CEP) and MPs with the tumoral growth of monoclonal gammopathy. On the other hand, there is no study measuring the CEC and CEP directly in the bone marrow. The investigators aim is to evaluate these 2 original features in patients with monoclonal gammopathy: monoclonal gammopathy of undetermined signification (MGUS) and myeloma. This is a preliminary multicentric study.
Principal objective : Research of a correlation of blood CEC and MPs with the tumoral volume
and the clinico-biological staging of monoclonal gammopathies.
Secondary objectives : Research of a correlation of bone marrow endothelial cells and MPs,
both measured by flow cytometry, with the tumoral volume and the clinico-biological staging
of monoclonal gammopathies.
Principal analyses : Blood levels of CEC and its progenitors, soluble parameters of
angiogenesis and of coagulability, and microparticles versus classical indicators of tumoral
growth of monoclonal gammopathies (beta2-microglobulin and Ig peak).
Secondary analyses : Bone marrow levels of endothelial cells and its progenitors, soluble
parameters of angiogenesis and of coagulability, and microparticles versus classical
indicators of tumoral growth of monoclonal gammopathies (beta2-microglobulin and Ig peak).
Methodology : PACMoG is an interventional, prospective and multicentric pilot study.
Biologic parameters will be determined at the diagnosis of monoclonal gammopathy. Results
will be compared to the monoclonal gammopathy international staging and the clinical
follow-up.
Procedures : Specific tests of the study will be realized from :
- Blood samples: 2 EDTA tubes and 1 tube without anticoagulant per included patient.
- Bone marrow: 3 ml collected during of myelogram punction made for the diagnosis.
In all cases, no additional sampling will be performed.
Specific analyses :
- Specific biological assays in blood and bone marrow will be:
- Endothelial and progenitor cells levels
- Number and cellular origin of MPSs
- Levels of phospholipid-dependant coagulability
- Soluble parameters of angiogenesis (VEGF, soluble CD146, endostatin)
- Soluble parameters of coagulability (Levels of thrombomodulin, tissue factor and
D-Dimer)
;
Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Basic Science
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