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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Cisplatin-resistance involves the defective processing of MEKK1 in human ovarian adenocarcinoma 2008/C13 cells.

Cisplatin has been widely used as a chemotherapeutic agent to treat different types of tumors. However, its use is limited by the ability of the tumor cells to develop cisplatin-resistance. The molecular lesion that produces cisplatin-resistance is poorly understood. In this report, we show that cisplatin activates a robust apoptotic pathway involving the activation of JNK and p38MAPK whereas it fails to elicit such a response in cisplatin-resistant 2008/C13 cells. Analysis of the defective apoptotic pathway in 2008/C13 cells indicates that these cells are deficient in the proteolytic activation of MEKK1 by caspase-3. The blunted activity of caspase-3 appears to be closely related to the increased levels of the anti-apoptotic protein Bcl-xL seen in the resistant cells. These studies, for the first time, demonstrate that inadequate caspase-3 processing and MEKK1 activation can lead to a drug-resistant phenotype.[1]

References

  1. Cisplatin-resistance involves the defective processing of MEKK1 in human ovarian adenocarcinoma 2008/C13 cells. Gebauer, G., Mirakhur, B., Nguyen, Q., Shore, S.K., Simpkins, H., Dhanasekaran, N. Int. J. Oncol. (2000) [Pubmed]
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