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Original Article

Fas Antigen/APO-1 (CD95) Expression on Myeloma Cells

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Pages 521-531 | Received 16 Feb 1996, Published online: 01 Jul 2009
 

Abstract

Many factors involved in the proliferation of myelomas have been reported, and the relationship between these factors and the pathogenesis of multiple myeloma has been discussed. We found that most myeloma cells express Fas antigen/APO-1 (CD95), a cell surface antigen that mediates apoptosis. However only some cells are sensitive to anti-Fas antibody and undergo apoptosis. These data indicate that some multiple myelomas are generated not only by cell proliferation but also by cell immortalization. The mechanism by which myelomas are immortalized is still unclear, but Bcl-2, Bcl-xL, adult T cell leukemia derived factor (ADF), soluble Fas are all candidate factors for this mechanism. The possibility also exists that inducers of apoptosis, e.g. tumor necrosis factor(TNF), interleukin-lβ-converting enzyme(lCE), Bcl-xS, or Bax, do not have a lethal effect. In this review, we focus on the system that immortalizes myeloma cells, and suggest the possibility that multiple myeloma constitutes one group of cells which cannot undergo apoptosis in the bone marrow.

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