Cisplatin-induced apoptosis inhibits autophagy, which acts as a pro-survival mechanism in human melanoma cells.
Cisplatin-induced apoptosis inhibits autophagy, which acts as a pro-survival mechanism in human melanoma cells.
复制标题
DOI:
10.1371/journal.pone.0057236
复制
发表时间:
2013
期刊:
影响因子:
3.7
通讯作者:
Maellaro E
中科院分区:
文献类型:
--
作者:
Del Bello B;Toscano M;Moretti D;Maellaro E
The interplay between a non-lethal autophagic response and apoptotic cell death is still a matter of debate in cancer cell biology. In the present study performed on human melanoma cells, we investigate the role of basal or stimulated autophagy in cisplatin-induced cytotoxicity, as well as the contribution of cisplatin-induced activation of caspases 3/7 and conventional calpains. The results show that, while down-regulating Beclin-1, Atg14 and LC3-II, cisplatin treatment inhibits the basal autophagic response, impairing a physiological pro-survival response. Consistently, exogenously stimulated autophagy, obtained with trehalose or calpains inhibitors (MDL-28170 and calpeptin), protects from cisplatin-induced apoptosis, and such a protection is reverted by inhibiting autophagy with 3-methyladenine or ATG5 silencing. In addition, during trehalose-stimulated autophagy, the cisplatin-induced activation of calpains is abrogated, suggesting the existence of a feedback loop between the autophagic process and calpains. On the whole, our results demonstrate that in human melanoma cells autophagy may function as a beneficial stress response, hindered by cisplatin-induced death mechanisms. In a therapeutic perspective, these findings suggest that the efficacy of cisplatin-based polychemotherapies for melanoma could be potentiated by inhibitors of autophagy.
登录
查看更多内容
影响因子:
9
作者:
通讯作者:
--
影响因子:
13.3
作者:
Dadakhujaev, Shorafidinkhuja;Jung, Eun Joo;Kim, Deok Ryong
通讯作者:
Kim, Deok Ryong
影响因子:
1.7
作者:
Lazova, Rossitza;Klump, Vincent;Pawelek, John
通讯作者:
Pawelek, John
影响因子:
3.6
作者:
Lazova, Rossitza;Pawelek, John M.
通讯作者:
Pawelek, John M.
影响因子:
4.7
作者:
Moretti, D.;Del Bello, B.;Maellaro, E.
通讯作者:
Maellaro, E.