- 作者: Rene Daniel; Siu-Wah Chung; Hong Chen; Pete M.C. Wong
- 作者服務機構: Fels Institute for Cancer Research and Molecular Biology, Departments of Pathology and Laboratory Medicine, Biochemistry, Microbiology and Immunology, Temple University School of Medicine, Philadelphia, Pa., USA
- 中文摘要: --
- 英文摘要: The c-abl proto-oncogene is ubiquitously expressed during mammalian development. Activated forms of c-Abl proteins are oncogenic and have been shown to suppress apoptosis. The biological role of normal c-Abl protein is unknown. In this study, we have introduced c-abl antisense sequences into various hemopoietic cells by retroviral gene transfer. Introduction and expression of the antisense sequence effectively reduced the amount of c-Abl protein in a number of transduced hemopoietic cells, that consequently underwent apoptosis. When factor-dependent cell lines were examined, we observed that the addition of sufficient amounts of growth factors could suppress apoptosis in myeloid but not in lymphoid lines. The ability of myeloid cells to be rescued by growth factors correlated with upregulation of mRNA level of IL-3 receptor subunits. Our data suggest that c-Abl provides an anti-apoptotic signal during mammalian cell growth, and that myeloid and lymphoid cells are different in their resistance to apoptosis.
- 中文關鍵字: --
- 英文關鍵字: Retroviral gene transfer; Apoptosis; Antisense; Growth factor receptors ; C-Abl