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- W2023698186 abstract "Plasma cysteine is strongly associated with body fat mass in human cohorts and diets low in cysteine prevents fat accumulation in mice. It is unclear if plasma cysteine affects fat development or if fat accumulation raises plasma cysteine. To determine if cysteine affects adipogenesis, we differentiated 3T3-L1 preadipocytes in medium with reduced cysteine. Cells incubated in media with 10–20 μM cysteine exhibited reduced capacity to differentiate into triacylglycerol-storing mature adipocytes compared with cells incubated with 50 μM cysteine. Low cysteine severely reduced expression of peroxisome proliferator-activated receptor gamma2 (Pparγ2) and its target genes perlipin1 (Plin1) and fatty acid binding protein-4 (Fabp4). Expression of stearoyl-CoA desaturase-1 (Scd1), known to be repressed with cysteine depletion, was also reduced with low cysteine. Medium depletion of the essential amino acids leucine, valine, and isoleucine had only a modest effect on adipocyte specific gene expression and differentiation. Stimulation with the PPARγ agonist BRL-49653 or addition of a hydrogen sulfide donor enhanced differentiation of 3T3-L1 cells cultured in low cysteine. This demonstrates that the ability to induce PPARγ expression is preserved when cells are cultured in low cysteine. It therefore appears that cysteine depletion inhibits adipogenesis by specifically affecting molecular pathways required for induction of PPARγ expression, rather than through a general reduction of global protein synthesis. In conclusion, we show that low extracellular cysteine reduces adipocyte differentiation by interfering with PPARγ2 and PPARγ target gene expression. Our results provide further evidence for the hypothesis that plasma cysteine is a casual determinant for body fat mass." @default.
- W2023698186 created "2016-06-24" @default.
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- W2023698186 date "2010-06-01" @default.
- W2023698186 modified "2023-09-26" @default.
- W2023698186 title "445 Study of the molecular mechanism of LIF induction by TGF-beta" @default.
- W2023698186 doi "https://doi.org/10.1016/s1359-6349(10)71246-5" @default.
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