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Spots Global Cancer Trial Database for Differential Expression of CD200 in B-chronic Lymphoproliferative Disorders by Multicolour Flow Cytometry

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Trial Identification

Brief Title: Differential Expression of CD200 in B-chronic Lymphoproliferative Disorders by Multicolour Flow Cytometry

Official Title: Differential Expression of CD200 in B-chronic Lymphoproliferative Disorders by Multicolour Flow Cytometry

Study ID: NCT03712488

Conditions

Neoplasms

Interventions

flowcytometry

Study Description

Brief Summary: The investigator's goals in this study are to assess : 1. Differential expression of CD200 by using flow cytometric immune-phenotyping in broad range of patients with B-chronic lymphoproliferative disorders (B-CLPD) 2. Role of CD200 in diagnosis , classification and potential value in differential diagnosis 3. CD200 expression level at different anatomic sites

Detailed Description: B-Chronic lymphoproliferative disorders (B-CLPDs) are heterogeneous group of disorders with variable clinical presentations and outcomes. They are classified into : chronic lymphocytic leukaemia (CLL), B-cell prolymphocytic leukaemia (B-PLL), hairy cell leukaemia (HCL), and mantle cell lymphoma (MCL), marginal zone lymphoma (MZL), follicular lymphoma (FL) and lymphoplasmacytic lymphoma/WaldenstrÖm macroglobulinaemia (LPL/WM) in leukaemia phase. Characterization of CLPDs by immunophenotyping (IPT) has become an important and widely used method in hematology. Immunophenotyping is indispensable for the diagnosis of B-CLPDs through recognition of restricted light chain expression and characteristic phenotypes of separate entities. Immunophenotypic characterization of lymphoid neoplasms is important for diagnosis, sub-classification, and staging and can also play a role in monitoring minimal residual disease. However, the differential diagnosis may be difficult to resolve in some cases, for example, between B-cell neoplasms with full or partial CD5 expression. CD200 has recently been identified as a potentially useful antigen for flow cytometric immunophenotyping of lymphoid neoplasms, particularly those of the B lineage. CD200 belongs to the immunoglobulin superfamily and is composed of a light chain-like structure with two extracellular variable- and constant-like domains followed by a transmembrane segment and a cytoplasmic tail.5 CD200 is expressed by various cell types, including B cells, a subset of T cells (including activated T cells), thymocytes, endothelial cells, and neurons . CD200 generates an immunosuppressive signal by binding to its cognate receptor, CD200 receptor 1 (CD200R1) , which is expressed specifically in granulocytes and monocytes and in a subset of T cells. CD200 appears to play a role in the regulation of antitumor activity and these findings are the basis for ongoing clinical trials using anti-CD200 therapy for chronic lymphocytic leukemia (CLL)

Eligibility

Minimum Age:

Eligible Ages: CHILD, ADULT, OLDER_ADULT

Sex: ALL

Healthy Volunteers: No

Locations

Contact Details

Name: douaa M Sayed, professor

Affiliation: South Egypt Cancer Institute

Role: STUDY_DIRECTOR

Useful links and downloads for this trial

Clinicaltrials.gov

Google Search Results

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