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FGF-2 inhibits TNF-α mediated apoptosis through up-regulation of Bcl2-A1 and Bcl-xL in ATDC5 cells
( Hey Ryun Kim ),( Youn Moo Heo ),( Kyoung Il Jeong ),( Yong Min Kim ),( Hae Lan Jang ),( Kwang Yeol Lee ),( Chang Yeol Yeo ),( Sung Hoon Kim ),( Hak Kyo Lee ),( Seung Ryul Kim ),( Eung Gook Kim ),( J 생화학분자생물학회 (구 한국생화학분자생물학회) 2012 BMB Reports Vol.45 No.5
FGF-2 is involved in cell survival, proliferation, apoptosis, and angiogenesis in a wide variety of cells. FRGRs, PI3K and MAP kinases are well known mediators of FGF signaling. Despite its known roles during many developmental processes, including osteogenesis, there are few known targets of FGF-2. In the present study, we identified Bcl2-A1 and Bcl-xL as two prominent targets involved in promoting cell survival. Pretreatment of ATDC5 cells with FGF-2 increased cell survival, while siRNAs specific for Bcl2-A1 and Bcl-xL compromised the anti- apoptotic effect of FGF-2, sensitized the cells to apoptosis triggered by TNF-α. Chemical inhibition of FGFR, NFkB, and PI3K activity by PD173074, pyrrolidine dithiocarbamate, and LY294002 respectively abrogated the FGF-2-mediated induction of Bcl2-A1 and Bcl-xL expression. Taken together, our data demonstrate that a subset of Bcl2 family proteins are the targets of FGF-2 signaling that promotes the survival of ATDC5 cells. [BMB reports 2012; 45(5): 287-292]