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- W2030897216 abstract "The enzyme retinol saturase (RetSat) catalyzes the saturation of all-irans-retinol to produce (R)-all-trans-13,14-dihydroretinol. As a peroxisome pro-liferator-activated receptor (PPAR) γ target, RetSat was shown to be required for adipocyte differentiation in the 3T3-L1 cell culture model. To understand the mechanism involved in this putative proadipogenic effect of RetSat, we studied the consequences of ablating RetSat expression on retinoid metabolism and adipose tissue differentiation in RetSat-null mice. Here, we report that RetSat-null mice have normal levels of retinol and retinyl palmitate in liver, serum, and adipose tissue, but, in contrast to wild-type mice, are deficient in the production of all-trans-13,14-dihydroretinol from dietary vitamin A. Despite accumulating more fat, RetSat-null mice maintained on either low-fat or high-fat diets gain weight and have similar rates of food intake as age- and gender-matched wildtype control littermates. This increased adiposity of RetSat-null mice is associated with up-regulation of PPARγ, a key transcriptional regulator of adipogenesis, and also its downstream target, fatty acid-binding protein 4 (FABP4/aP2). On the basis of these results, we propose that dihydroretinoids produced byRetSat control physiological processes that influence PPARγ activity and regulate lipid accumulation in mice.—Moise, A. R., Lobo, G. P., Erokwu, B., Wilson, D. L., Peck, D., Alvarez, S., Domínguez, M., Alvarez, R., Flask, C. A., de Lera, A. R., von Lintig, J., Palczewski, K. Increased adiposity in the retinol saturase-knockout mouse. FASEB J. 24, 1261–1270 (2010). www.fasebj.org" @default.
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- W2030897216 date "2009-11-25" @default.
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- W2030897216 title "Increased adiposity in the retinol saturase‐knockout mouse" @default.
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- W2030897216 doi "https://doi.org/10.1096/fj.09-147207" @default.
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