Abstract:
:Therapies that target estrogen signaling have transformed the treatment of breast cancer. However, the effectiveness of these agents is limited by the development of resistance. Here, an RNAi screen was used to identify modifiers of tamoxifen sensitivity. We demonstrate that CDK10 is an important determinant of resistance to endocrine therapies and show that CDK10 silencing increases ETS2-driven transcription of c-RAF, resulting in MAPK pathway activation and loss of tumor cell reliance upon estrogen signaling. Patients with ER alpha-positive tumors that express low levels of CDK10 relapse early on tamoxifen, demonstrating the clinical significance of these observations. The association of low levels of CDK10 with methylation of the CDK10 promoter suggests a mechanism by which CDK10 expression is reduced in tumors.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Iorns E,Turner NC,Elliott R,Syed N,Garrone O,Gasco M,Tutt AN,Crook T,Lord CJ,Ashworth Adoi
10.1016/j.ccr.2008.01.001subject
Has Abstractpub_date
2008-02-01 00:00:00pages
91-104issue
2eissn
1535-6108issn
1878-3686pii
S1535-6108(08)00004-4journal_volume
13pub_type
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