作者: A. A. Adjei
关键词:
摘要: The Ras gene product is a monomeric membrane-localized G protein of 21 kd that functions as molecular switch linking receptor and nonreceptor tyrosine kinase activation to downstream cytoplasmic or nuclear events. Each mammalian cell contains at least three distinct ras proto-oncogenes encoding closely related, but proteins. Activating mutations in these proteins result constitutive signaling, thereby stimulating proliferation inhibiting apoptosis. Oncogenic the are present approximately 30% all human cancers. K-ras occur frequently non-small-cell lung, colorectal, pancreatic carcinomas; H-ras common bladder, kidney, thyroid N-ras found melanoma, hepatocellular carcinoma, hematologic malignancies. ras-signaling pathway has attracted considerable attention target for anticancer therapy because its important role carcinogenesis. In this review, physiologic biochemical properties proteins, their mechanism relation cancer will be discussed. Novel therapeutic approaches based on inhibition Ras-mediated including processing, synthesis, blockage effectors,