Comparative proteomic study of liver lipid droplets and mitochondria in mice housed at different temperatures

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Abstract

Laboratory mice are standardly housed at around 23 °C, setting them under chronic cold stress. Metabolic changes in the liver in mice housed at thermoneutral, standard and cold temperatures remain unknown. In the present study, we isolated lipid droplets and mitochondria from their livers in a comparative proteomic study aiming to investigate the changes. According to proteomic analysis, mitochondrial tricarboxylic acid cycle (TCA cycle) and retinol metabolism are enhanced, whereas oxidative phosphorylation is not affected obviously under cold conditions, suggesting that liver mitochondria may increase TCA cycle capacity in biosynthetic pathways, as well as retinol metabolism, to help the liver to adapt. Based on proteomic and immunoblotting results, perilipin 5 and major urinary proteins are increased significantly, whereas mitochondrial pyruvate carrier is decreased dramatically under cold conditions, indicating their involvement in liver adaptation.

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Liu, Q., Zhou, Z., Liu, P., & Zhang, S. (2019). Comparative proteomic study of liver lipid droplets and mitochondria in mice housed at different temperatures. FEBS Letters, 593(16), 2118–2138. https://doi.org/10.1002/1873-3468.13509

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