Investigation of the mechanisms of hepatic insul in sensitization by retinoi cacid.

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Based on our original finding, the leptin-dependent hepatic insulinsensitization by retinoid, I investigated its precise mechanisms. It was demonstrated thatretinoid activates hepatic leptin signaling by directly inducing leptin receptor expressionvia retinoid receptor. A synthetic rtinoid, tamibarotene, also showed the same effect,suggesting its potential as a novel insulin-resistance treatment. Moreover, AntiX wasidentified as a target gene of hepatic leptin signaling, and the expression level of AntiX inthe liver was significantly correlated with the pathological status of insulin resistance.