Haploinsufficiency of p18INK4c Sensitizes Mice to Carcinogen-Induced Tumorigenesis
摘要：
The INK4 family of cyclin-dependent kinase (CDK) inhibitors negatively regulates cyclin D-dependent CDK4 and CDK6 and thereby retains the growth-suppressive function of Rb family proteins. Mutations in the CDK4 gene conferring INK4 resistance are associated with familial and sporadic melanoma in humans and result in a wide spectrum of tumors in mice. Whereas loss of function of other INK4 genes in mice leads to little or no tumor development, targeted deletion of p18(INK4c) causes spontaneous pituitary tumors and lymphoma late in life. Here we show that treatment of p18 null and heterozygous mice with a chemical carcinogen resulted in tumor development at an accelerated rate. The remaining wild-type allele of p18 was neither mutated nor silenced in tumors derived from heterozygotes. Hence, p18 is a haploinsufficient tumor suppressor in mice.
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关键词：
cancer arginine arginase norvaline ornithine deprivation catabolism cell proliferation cell death
DOI：
10.2214/AJR.08.1413
被引量：
年份：
2003
Wiley
万方
Semantic Scholar
万方医学
掌桥科研
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