BIM is the primary mediator of MYC-induced apoptosis in multiple solid tissues.

BIM is the primary mediator of MYC-induced apoptosis in multiple solid tissues.
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DOI:
10.1016/j.celrep.2014.07.057
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发表时间:
2014-09-11
期刊:
影响因子:
8.8
通讯作者:
Murphy DJ
Murphy DJ
中科院分区:
生物学1区
文献类型:
--
作者:
Muthalagu N;Junttila MR;Wiese KE;Wolf E;Morton J;Bauer B;Evan GI;Eilers M;Murphy DJ

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MYC是人类癌症中最频繁过表达的癌基因之一,并且甚至适度失调的MYC也可以在体内启动许多有丝分裂后细胞类型的异位增殖。细胞对凋亡的敏感性限制了MYC的致癌潜力。然而,MYC诱导细胞凋亡的机制是有争议的:一些研究涉及p19 ARF介导的p53稳定,然后诱导促凋亡的BH 3蛋白NOXA和BH 3 A,而其他人则认为直接调节BH 3蛋白,特别是BIM。在这里,我们使用一个单一的实验系统,系统地评估MYC诱导的细胞凋亡过程中,在体外,在体内,并与广泛使用的化疗药物,阿霉素相结合的p19 ARF和BIM的作用。我们发现,在MYC诱导的细胞凋亡过程中,在多种设置中,BIM的一个共同的具体要求,这并不延伸到p53-响应BH 3家族成员MAGINIA,并没有发现任何证据的作用,p19 ARF在MYC诱导的细胞凋亡的组织检查。
MYC is one of the most frequently overexpressed oncogenes in human cancer and even modestly deregulated MYC can initiate ectopic proliferation in many post-mitotic cell types in vivo. Sensitization of cells to apoptosis limits MYC’s oncogenic potential. However, the mechanism through which MYC induces apoptosis is controversial: Some studies implicate p19ARF-mediated stabilization of p53, followed by induction of pro-apoptotic BH3 proteins NOXA and PUMA, while others argue for direct regulation of BH3 proteins, especially BIM. Here, we use a single experimental system to systematically evaluate the roles of p19ARF and BIM during MYC-induced apoptosis, in vitro, in vivo, and in combination with a widely used chemotherapeutic, Doxorubicin. We find a common specific requirement for BIM during MYC-induced apoptosis in multiple settings, which does not extend to the p53-responsive BH3 family member PUMA, and find no evidence of a role for p19ARF during MYC-induced apoptosis in the tissues examined.
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