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

October 18, 2018 updated by: Menna-allah M. Atef, Assiut University

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

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

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)

Study Type

Observational

Enrollment (Anticipated)

50

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Child
  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

All newly diagnosed patients with B-chronic lymphoproliferative disorders

Description

Inclusion Criteria:

  • All newly diagnosed patients with B-chronic lymphoproliferative disorders

Exclusion Criteria:

  • 1) Patient refusal 2) Patients diagnosed T-cell non-hodgkins lymphoma 3) Patients receiving chemo and/or radiotherapy 4) Patients on steroid therapy for any other cause 5) Patients receiving any immunosuppressive drugs

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Differential expression of CD200 by using flow cytometric immune-phenotyping in B-chronic lymphoproliferative disorders (B-CLPD)
Time Frame: baseline
Analysis of expression of CD200 in B-CLPDs for differential diagnosis of subtypes of B-CLPDs
baseline

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Assiut University

Investigators

  • Study Director: douaa M Sayed, professor, South Egypt Cancer Institute

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Anticipated)

December 15, 2018

Primary Completion (Anticipated)

August 30, 2020

Study Completion (Anticipated)

April 1, 2021

Study Registration Dates

First Submitted

October 17, 2018

First Submitted That Met QC Criteria

October 18, 2018

First Posted (Actual)

October 19, 2018

Study Record Updates

Last Update Posted (Actual)

October 19, 2018

Last Update Submitted That Met QC Criteria

October 18, 2018

Last Verified

October 1, 2018

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • flow cytometry in neoplasms

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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