IGF-IR-dependent expression of Survivin is required for T-antigen-mediated protection from apoptosis and proliferation of neural progenitors.
IGF-IR-dependent expression of Survivin is required for T-antigen-mediated protection from apoptosis and proliferation of neural progenitors.
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DOI:
10.1038/cdd.2009.146
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发表时间:
2010-03
影响因子:
12.4
通讯作者:
Del Valle L
中科院分区:
文献类型:
--
作者:
Gualco E;Urbanska K;Perez-Liz G;Sweet T;Peruzzi F;Reiss K;Del Valle L
The Insulin-like Growth Factor-1 Receptor (IGF-IR) and the human polyomavirus JCV protein, T-Antigen cooperate in the transformation of neuronal precursors in the cerebellum, which may be a contributing factor in the development of brain tumors. Since it is not clear why T-Antigen requires IGF-IR for transformation, we investigated this process in neural progenitors from IGF-IR knockout embryos (ko-IGF-IR) and from their wild type non-transgenic littermates (wt-IGF-IR). In contrast to wt-IGF-IR, the brain and dorsal root ganglia of ko-IGF-IR embryos showed low levels of the anti-apoptotic protein Survivin, accompanied by elevated numbers of apoptotic neurons and an earlier differentiation phenotype. In wt-IGF-IR neural progenitors in vitro, induction of T-Antigen expression tripled the expression of Survivin, and accelerated cell proliferation. In ko-IGF-IR progenitors induction of T-Antigen failed to increase Survivin, resulting in massive apoptosis. Importantly, ectopic expression of Survivin protected ko-IGF-IR progenitor cells from apoptosis and siRNA inhibition of Survivin activated apoptosis in wt-IGF-IR progenitors expressing T-Antigen. Our results indicate that reactivation of the anti-apoptotic Survivin may be a critical step in JCV T-Antigen induced transformation, which in neural progenitors requires IGF-IR.
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影响因子:
4.8
作者:
Lassak, A;Del Valle, L;Reiss, K
通讯作者:
Reiss, K
DOI:
10.1073/pnas.96.20.11519
发表时间:
1999-09-28
影响因子:
11.1
作者:
Krynska, B;Del Valle, L;Khalili, K
通讯作者:
Khalili, K
影响因子:
64.5
作者:
BAKER, J;LIU, JP;EFSTRATIADIS, A
通讯作者:
EFSTRATIADIS, A
DOI:
10.1073/pnas.93.16.8630
发表时间:
1996-08-06
影响因子:
11.1
作者:
Reiss, K;Cheng, W;Anversa, P
通讯作者:
Anversa, P
影响因子:
3.2
作者:
Del Valle, L;Wang, JY;Reiss, K
通讯作者:
Reiss, K