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. 2001 Oct 15;61(20):7426-9.

The phosphatidylinositol 3'-kinase p85alpha gene is an oncogene in human ovarian and colon tumors

A J Philp  1 , I G Campbell, C Leet, E Vincan, S P Rockman, R H Whitehead, R J Thomas, W A Phillips
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  • PMID: 11606375

The phosphatidylinositol 3'-kinase p85alpha gene is an oncogene in human ovarian and colon tumors

A J Philp et al. Cancer Res. .

Abstract

Phosphatidylinositol 3'-kinases (PI3ks) are a family of lipid kinases that play a crucial role in a wide range of important cellular processes associated with malignant behavior including cell growth, migration, and survival VSports手机版. We have used single-strand conformational polymorphism/heteroduplex analysis to demonstrate the presence of somatic mutations in the gene for the p85alpha regulatory subunit of PI3k (PIK3R1) in primary human colon and ovarian tumors and cancer cell lines. All of the mutations lead to deletions in the inter-SH2 region of the molecule proximal to the serine608 autoregulatory site. Expression of a mutant protein with a 23 amino acid deletion leads to constitutive activation of PI3k providing the first direct evidence that p85alpha is a new oncogene involved in human tumorigenesis. .

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