Title : Epidermal growth factor receptor-mediated activation of Stat3 during multistage skin carcinogenesis.

Pub. Date : 2004 Apr 1

PMID : 15059889






5 Functional Relationships(s)
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1 Stat1, Stat3, and Stat5 were activated in mouse epidermis after treatment with different classes of tumor promoters, including 12-O-tetradecanoylphorbol-13-acetate (TPA), okadaic acid, and chrysarobin. Tetradecanoylphorbol Acetate signal transducer and activator of transcription 3 Mus musculus
2 In addition, Stat1, Stat3, and Stat5 were constitutively activated in skin tumors generated by the two-stage carcinogenesis regimen using 7,12-dimethylbenz(a)anthracene as initiator and TPA as promoter. Tetradecanoylphorbol Acetate signal transducer and activator of transcription 3 Mus musculus
3 Abrogation of EGFR function in mouse epidermis using an EGFR kinase inhibitor or by overexpressing a dominant negative form of EGFR led to a reduction in Stat3 activation in response to TPA treatment. Tetradecanoylphorbol Acetate signal transducer and activator of transcription 3 Mus musculus
4 Immunoprecipitation analyses using lysates from TPA-treated epidermis and skin papillomas showed enhanced interaction between the EGFR and Stat3. Tetradecanoylphorbol Acetate signal transducer and activator of transcription 3 Mus musculus
5 Finally, Stat3 deficiency in mouse epidermis significantly reduced the proliferative response after TPA treatment. Tetradecanoylphorbol Acetate signal transducer and activator of transcription 3 Mus musculus