Apoptosis-gene expression in hematopoietic system: normal and pathological conditions (Review)

Gene expression involving apoptosis in the hematopoietic system is reviewed. In normal and hematological disorders, Fas-Fas ligand and tumor necrosis factor-alpha-receptor interaction play a major role in enhancing apoptosis. On the other hand, bcl-2 or certain novel proteins (including FADD, RIP, TRADD and sentrin) prevent apoptosis. Apoptosis is involved in myelodysplastic syndrome and pathogenesis of leukemia. Expression of Fas antigen plays a role in negative regulation of hematopoiesis in the bone marrow as does interferon-gamma.