Title : Mitotic deregulation by survivin in ErbB2-overexpressing breast cancer cells contributes to Taxol resistance.

Pub. Date : 2009 Feb 15

PMID : 19228734






7 Functional Relationships(s)
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1 Mitotic deregulation by survivin in ErbB2-overexpressing breast cancer cells contributes to Taxol resistance. Paclitaxel erb-b2 receptor tyrosine kinase 2 Homo sapiens
2 Here, we studied whether overexpression of ErbB2 may lead to mitotic deregulation in breast cancer cells via up-regulation of survivin that confers Taxol resistance. Paclitaxel erb-b2 receptor tyrosine kinase 2 Homo sapiens
3 EXPERIMENTAL DESIGN: ErbB2-overexpressing and ErbB2-low-expressing breast cancer cell lines were used to compare their mitotic exit rate, survivin expression level, and apoptosis level in response to Taxol. Paclitaxel erb-b2 receptor tyrosine kinase 2 Homo sapiens
4 ErbB2-overexpressing cells exited M phase faster than ErbB2-low-expressing cells, which correlated with the increased resistance to Taxol-induced apoptosis. Paclitaxel erb-b2 receptor tyrosine kinase 2 Homo sapiens
5 In addition, combination treatment of Taxol with PI3K/Akt and Src inhibitor led to increased apoptosis in ErbB2-overexpressing breast cancer cells than single treatment. Paclitaxel erb-b2 receptor tyrosine kinase 2 Homo sapiens
6 CONCLUSIONS: Survivin up-regulation by ErbB2 is a critical event in ErbB2-mediated faster mitotic exit and contributes to Taxol resistance. Paclitaxel erb-b2 receptor tyrosine kinase 2 Homo sapiens
7 CONCLUSIONS: Survivin up-regulation by ErbB2 is a critical event in ErbB2-mediated faster mitotic exit and contributes to Taxol resistance. Paclitaxel erb-b2 receptor tyrosine kinase 2 Homo sapiens