Mechanistic target of rapamycin complex (mTORC)1 is the major regulator of metabolism at the cellular and organismal level. mTORC1-mediated regulatory feedback loops enable adaptation to nutrient and growth factor availability and metabolic demand. In their recent study, Yoneyama et al. have identified and characterized a negative feedback loop from mTORC1 to insulin receptor substrate (IRS)1; the key component of the insulin/insulin-like growth factor (IGF) signaling pathway.
Keywords: IGF-I; IRS1; feedback loops; mTORC1; mTORC2.
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