Nitric oxide does not mediate but inhibits transformation and tumor phenotype.

Abstract excerpt

UNLABELLED: Although inducible nitric oxide synthase (iNOS) and nitric oxide (NO) are implicated in tumor pathology, their role in the early stages of carcinogenesis is not well defined. Tumor necrosis factor alpha (TNFalpha) induces iNOS and NO production in transformation-sensitive JB6 P+, but not in transformation-resistant JB6 P-, mouse epidermal cells. We tested the hypothesis that iNOS, by generating NO and...

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