Mice deficient in both p53 and Rb develop tumors primarily of endocrine origin.

Abstract excerpt

To examine whether a cooperative role exists between inherited Rb and p53 deficiency in tumorigenesis, crosses were made between p53- and Rb-deficient mice and were monitored for subsequent tumor incidence and spectrum. Parental mice containing either Rb or p53 mutant alleles showed a predisposition for pituitary adenomas or lymphomas and sarcomas, respectively. Mice heterozygous for both Rb and p53 mutant...

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