Regulation of Bcl-xL expression in human keratinocytes by cell-substratum adhesion and the epidermal growth factor receptor.
Regulation of Bcl-xL expression in human keratinocytes by cell-substratum adhesion and the epidermal growth factor receptor.
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通过细胞-基质粘附和表皮生长因子受体调节人角质形成细胞中的 Bcl-xL 表达。
DOI:
10.1073/pnas.94.10.5067
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发表时间:
1997
影响因子:
11.1
通讯作者:
Ewert,DL
中科院分区:
文献类型:
--
作者:
Rodeck,U;Jost,M;DuHadaway,J;Kari,C;Jensen,PJ;Risse,B;Ewert,DL
Cell–substratum adhesion is an essential requirement for survival of human neonatal keratinocytesin vitro. Similarly, activation of the epidermal growth factor receptor (EGF-R) has recently been implicated not only in cell cycle progression but also in survival of normal keratinocytes. The mechanisms by which either cell–substratum adhesion or EGF-R activation protect keratinocytes from programmed cell death are poorly understood. Here we describe that blockade of the EGF-R and inhibition of substratum adhesion share a common downstream event, the down-regulation of the cell death protector Bcl-xL. Expression of Bcl-xLprotein was down-regulated during forced suspension culture of keratinocytes, concurrent with large-scale apoptosis. Similarly, EGF-R blockade was accompanied by down-regulation of Bcl-xLsteady-state mRNA and protein levels to an extent comparable to that observed in forced suspension culture. However, down-regulation of Bcl-xLexpression by EGF-R blockade was not accompanied by apoptosis; in this case, a second signal, generated by passaging, was required to induce rapid and large-scale apoptosis. These findings are consistent with the conclusions that (i) Bcl-xLrepresents a shared molecular target for signaling through cell-substrate adhesion receptors and the EGF-R, and (ii) reduced levels of Bcl-xLexpression through EGF-R blockade lower the tolerance of keratinocytes for cell death signals generated by cellular stress.
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DOI:
--
发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Chen,HC;Guan,JL
通讯作者:
Guan,JL
影响因子:
4.4
作者:
Y. Mekori;C. Oh;D. Metcalfe
通讯作者:
D. Metcalfe
影响因子:
--
作者:
Alan Eastman
通讯作者:
Alan Eastman
影响因子:
11.2
作者:
U. Rodeck;M. Herlyn;D. Herlyn;C. Molthoff;B. Atkinson;M. Varello;Z. Steplewski;H. Koprowski
通讯作者:
U. Rodeck;M. Herlyn;D. Herlyn;C. Molthoff;B. Atkinson;M. Varello;Z. Steplewski;H. Koprowski
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
E. Finzi;R. Harkins;T. Horn
通讯作者:
T. Horn