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Anemia in multiple myeloma: role of deregulated plasma cell apoptosis

Marco Tucci1, Daniela Grinello, Paola Cafforio

  • 1DIMO, Department of Biomedical Sciences and Human Oncology, University of Bari, Italy.

Leukemia & Lymphoma
|October 29, 2002
PubMed

Insights

Anemia is common in multiple myeloma (MM). Malignant plasma cells may induce erythroblast death via Fas-ligand and TRAIL, contributing to anemia and suggesting early immunophenotyping for risk assessment.

Area of Science:

  • Hematology
  • Oncology
  • Cell Biology

Background:

  • Anemia affects over two-thirds of multiple myeloma (MM) patients.
  • Contributing factors include altered cytokines, erythropoietin deficiency, blood loss, and hemolysis.
  • Deregulated myeloma cell apoptosis is a potential contributor to anemia.

Purpose of the Study:

  • To investigate the role of myeloma cell apoptosis in the destruction of the erythroid matrix.
  • To determine if malignant plasma cells induce erythroblast cytotoxicity.
  • To assess the potential of immunophenotyping for identifying patients at risk of erythropoiesis exhaustion.

Main Methods:

  • Analysis of cytokine networks and erythropoietin levels.
  • Evaluation of myeloma cell apoptosis and its effect on erythroblasts.
  • Assessment of Fas-ligand (Fas-L) and TRAIL expression in malignant plasma cells.
  • Correlation of Fas-L/TRAIL expression with anemia severity and MM progression.

Main Results:

  • Myeloma cells can induce erythroblast cytotoxicity through deregulated apoptosis.
  • Highly malignant plasma cells overexpress Fas-ligand (Fas-L) and TRAIL.
  • These molecules efficiently trigger the death of immature erythroblasts.
  • Fas-L/TRAIL-based anemia is associated with severe MM progression.

Conclusions:

  • Overexpression of Fas-L and TRAIL by myeloma cells defines a cytotoxic-apoptogenic phenotype.
  • This phenotype contributes to anemia in multiple myeloma patients.
  • Early immunophenotyping of myeloma cells may identify patients at higher risk of erythropoiesis exhaustion.

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