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[Myeloma precursor cells and their differentiation]
Nihon Rinsho. Japanese Journal of Clinical Medicine
|March 1, 1995
Summary
Most bone marrow plasma cells originate from germinal center B cells. Immature myeloma cells, identified by specific markers, are considered myeloma precursor cells that proliferate in response to interleukin-6 (IL-6).
Area of Science:
- Immunology
- Hematology
- Cell Biology
Context:
- The differentiation pathway of plasma cells from germinal center B cells is increasingly understood.
- Bone marrow plasma cells are largely derived from germinal center B cells.
- Plasma cells and myeloma cells share differentiation pathways and classifications.
Purpose:
- To detail the differentiation pathways of plasma cells and myeloma cells.
- To identify key markers for classifying plasma and myeloma cells.
- To elucidate the role of immature myeloma cells in disease progression.
Summary:
- Plasma cells differentiate from germinal center B cells, with most bone marrow plasma cells originating from this pathway.
- Immature, intermediate, and mature plasma cells are identified in peripheral blood and bone marrow by adhesion molecules like VLA-5 and MPC-1.
- Immature myeloma cells, responsive to interleukin-6 (IL-6), circulate and expand during relapse, indicating their role as clonogenic myeloma precursor cells.
Impact:
- Clarifies the origin and differentiation of plasma cells.
- Provides a basis for understanding myeloma cell heterogeneity.
- Highlights immature myeloma cells as potential therapeutic targets.