Selective killing of p53-deficient cancer cells by SP600125.
Selective killing of p53-deficient cancer cells by SP600125.
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DOI:
10.1002/emmm.201200228
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发表时间:
2012-06
影响因子:
11.1
通讯作者:
Kroemer, Guido
中科院分区:
文献类型:
--
作者:
Jemaa, Mohamed;Vitale, Ilio;Kepp, Oliver;Berardinelli, Francesco;Galluzzi, Lorenzo;Senovilla, Laura;Marino, Guillermo;Malik, Shoaib Ahmad;Rello-Varona, Santiago;Lissa, Delphine;Antoccia, Antonio;Tailler, Maximilien;Schlemmer, Frederic;Harper, Francis;Pierron, Gerard;Castedo, Maria;Kroemer, Guido
The genetic or functional inactivation of p53 is highly prevalent in human cancers. Using high-content videomicroscopy based on fluorescent TP53+/+ and TP53−/− human colon carcinoma cells, we discovered that SP600125, a broad-spectrum serine/threonine kinase inhibitor, kills p53-deficient cells more efficiently than their p53-proficient counterparts, in vitro. Similar observations were obtained in vivo, in mice carrying p53-deficient and -proficient human xenografts. Such a preferential cytotoxicity could be attributed to the failure of p53-deficient cells to undergo cell cycle arrest in response to SP600125. TP53−/− (but not TP53+/+) cells treated with SP600125 became polyploid upon mitotic abortion and progressively succumbed to mitochondrial apoptosis. The expression of an SP600125-resistant variant of the mitotic kinase MPS1 in TP53−/− cells reduced SP600125-induced polyploidization. Thus, by targeting MPS1, SP600125 triggers a polyploidization program that cannot be sustained by TP53−/− cells, resulting in the activation of mitotic catastrophe, an oncosuppressive mechanism for the eradication of mitosis-incompetent cells.
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DOI:
10.1073/pnas.251194298
发表时间:
2001-11-20
影响因子:
11.1
作者:
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通讯作者:
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