NRIP1 and Obesity: Furthermore, lactate induction of 3T3-L1 adipocyte browning was inhibited either by RIP140 or by silencing of PGC-1α, suggesting that modulation of the PPARγ transcriptional complex by LKU4-induced lactate facilitates browning of white adipocytes in WAT, which, in turn, inhibits diet-induced obesity in HFD mice.