Inositol pyrophosphates inhibit Akt signaling, thereby regulating insulin sensitivity and weight gain.
Inositol pyrophosphates inhibit Akt signaling, thereby regulating insulin sensitivity and weight gain.
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DOI:
10.1016/j.cell.2010.11.032
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发表时间:
2010-12-10
期刊:
影响因子:
64.5
通讯作者:
Snyder SH
中科院分区:
文献类型:
--
作者:
Chakraborty A;Koldobskiy MA;Bello NT;Maxwell M;Potter JJ;Juluri KR;Maag D;Kim S;Huang AS;Dailey MJ;Saleh M;Snowman AM;Moran TH;Mezey E;Snyder SH
The inositol pyrophosphate IP7 (5-diphosphoinositolpentakisphosphate), formed by a family of three inositol hexakisphosphate kinases (IP6Ks), modulates diverse cellular activities. We now report that IP7 is a physiologic inhibitor of Akt, a serine/threonine kinase which regulates glucose homeostasis and protein translation respectively via the GSK3β and mTOR pathways. Thus Akt, mTOR and GSK3β signaling are dramatically augmented in skeletal muscle, white adipose tissue, and liver of mice with targeted deletion of IP6K1. IP7 impacts this pathway by potently inhibiting the PDK1 phosphorylation of Akt, preventing its activation and thereby impacting insulin signaling. IP6K1 knockout mice manifest insulin sensitivity and are resistant to obesity elicited by high fat diet or aging. Inhibition of IP6K1 may afford a therapeutic approach to obesity and diabetes.
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影响因子:
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通讯作者:
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DOI:
10.1073/pnas.0306743102
发表时间:
2005-04-26
影响因子:
11.1
作者:
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通讯作者:
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