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Related Experiment Videos

Circulating monoclonal B lymphocytes in multiple myeloma.

E K Chiu1, K Ganeshaguru, A V Hoffbrand

  • 1Department of Haematology, Royal Free Hospital School of Medicine, London.

British Journal of Haematology
|May 1, 1989
PubMed
Summary

Clonal immunoglobulin gene rearrangements in peripheral blood mononuclear cells were found in 36% of multiple myeloma patients, indicating circulating B lymphocytes are part of the malignant clone and correlating with higher tumor burden.

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Area of Science:

  • Hematology
  • Oncology
  • Immunology

Background:

  • Multiple myeloma (MM) is a malignant proliferation of plasma cells.
  • Understanding the extent of tumor cell dissemination is crucial for MM prognosis and treatment.

Purpose of the Study:

  • To investigate the presence and significance of clonal immunoglobulin gene rearrangements in peripheral blood mononuclear cells (PBIGRA) of MM patients.
  • To correlate PBIGRA with disease status and clinical parameters.

Main Methods:

  • Immunoglobulin gene analysis was performed on peripheral blood mononuclear cells from 28 MM patients and 9 monoclonal gammopathy of unknown significance (MGUS) patients.
  • Simultaneous analysis of bone marrow and peripheral blood was conducted in a subset of patients.
  • Correlation with disease activity, treatment status, and clinical markers was assessed.

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Main Results:

  • Clonal PBIGRA were detected in 36% (10/28) of MM patients, with identical rearrangements found in bone marrow.
  • PBIGRA incidence was higher in active disease (47%) versus remission (0%) and untreated (47%) versus treated (11%) MM patients (P<0.05).
  • Patients with PBIGRA showed significantly higher serum calcium (P<0.001) and bone marrow plasma cell counts (P<0.05).

Conclusions:

  • Circulating B lymphocytes in MM patients can harbor the malignant clone.
  • The presence of PBIGRA correlates with higher tumor burden and active disease.
  • PBIGRA analysis offers insights into MM dissemination and disease activity.