Tumours with PI3K activation are resistant to dietary restriction

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Tumours with PI3K activation are resistant to dietary restriction

Dietary restriction delays the incidence and decreases the growth of various types of tumours, but the mechanisms underlying the sensitivity of tumours to food restriction remain unknown. Here we show that certain human cancer cell lines, when grown as tumour xenografts in mice, are highly sensitive to the anti-growth effects of dietary restriction, whereas others are resistant. Cancer cells th...

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Cancer cells expressing constitutively active phosphatidylinositol-3 kinase (PI3K) are proliferative regardless of the absence of insulin, and they form dietary restriction (DR)-resistant tumors in vivo. Because the binding of insulin to its receptors activates the PI3K/AKT/mammalian target of rapamycin (mTOR) signaling cascade, activating mutations in the PIK3CA oncogene may determine tumor re...

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ژورنال

عنوان ژورنال: Nature

سال: 2009

ISSN: 0028-0836,1476-4687

DOI: 10.1038/nature07782