Genetic deletion of p21WAF1 enhances papilloma formation but not malignant conversion in experimental mouse skin carcinogenesis.

Abstract excerpt

Tumor suppression by p53 is believed to reside in its ability to regulate gene transcription, including up-regulation of p21WAF1. In p53(-/-) mice, chemical- or oncogene-induced skin tumors undergo accelerated malignant conversion. To determine the contribution of the p21WAF1 gene product to epidermal carcinogenesis, animals +/+, +/-, and -/- for a null mutation in the p21WAF1 gene were treated once with 25 nmol...

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