PMID- 37561578 OWN - NLM STAT- MEDLINE DCOM- 20230926 LR - 20240210 IS - 2379-3708 (Electronic) IS - 2379-3708 (Linking) VI - 8 IP - 18 DP - 2023 Sep 22 TI - ACOT1 deficiency attenuates high-fat diet-induced fat mass gain by increasing energy expenditure. LID - 10.1172/jci.insight.160987 [doi] LID - e160987 AB - Acyl-CoA thioesterase 1 (ACOT1) catalyzes the hydrolysis of long-chain acyl-CoAs to free fatty acids and CoA and is typically upregulated in obesity. Whether targeting ACOT1 in the setting of high-fat diet-induced (HFD-induced) obesity would be metabolically beneficial is not known. Here we report that male and female ACOT1KO mice are partially protected from HFD-induced obesity, an effect associated with increased energy expenditure without alterations in physical activity or food intake. In males, ACOT1 deficiency increased mitochondrial uncoupling protein-2 (UCP2) protein abundance while reducing 4-hydroxynonenal, a marker of oxidative stress, in white adipose tissue and liver of HFD-fed mice. Moreover, concurrent knockdown (KD) of UCP2 with ACOT1 in hepatocytes prevented increases in oxygen consumption observed with ACOT1 KD during high lipid loading, suggesting that UCP2-induced uncoupling may increase energy expenditure to attenuate weight gain. Together, these data indicate that targeting ACOT1 may be effective for obesity prevention during caloric excess by increasing energy expenditure. FAU - Heden, Timothy D AU - Heden TD AD - Pennington Biomedical Research Center, Baton Rouge, Louisiana, USA. FAU - Franklin, Mallory P AU - Franklin MP AD - Department of Biochemistry, Molecular Biology and Biophysics and. FAU - Dailey, Christina AU - Dailey C AD - Department of Biochemistry, Molecular Biology and Biophysics and. FAU - Mashek, Mara T AU - Mashek MT AD - Department of Biochemistry, Molecular Biology and Biophysics and. FAU - Chen, Chen AU - Chen C AD - Department of Biochemistry, Molecular Biology and Biophysics and. FAU - Mashek, Douglas G AU - Mashek DG AD - Department of Biochemistry, Molecular Biology and Biophysics and. AD - Department of Medicine, Division of Diabetes, Endocrinology and Metabolism, Medical School, University of Minnesota, Minneapolis, Minnesota, USA. LA - eng GR - R01 DK114401/DK/NIDDK NIH HHS/United States GR - R01 AG055452/AG/NIA NIH HHS/United States GR - F32 DK109556/DK/NIDDK NIH HHS/United States GR - P20 GM135002/GM/NIGMS NIH HHS/United States GR - L30 DK110338/DK/NIDDK NIH HHS/United States GR - T32 DK083250/DK/NIDDK NIH HHS/United States GR - R01 DK108790/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20230922 PL - United States TA - JCI Insight JT - JCI insight JID - 101676073 SB - IM MH - Animals MH - Female MH - Male MH - Mice MH - *Diet, High-Fat MH - Energy Metabolism MH - Liver/metabolism MH - *Obesity/metabolism MH - Weight Gain PMC - PMC10561717 OTO - NOTNLM OT - Fatty acid oxidation OT - Metabolism OT - Obesity OT - Uncoupling proteins COIS- Conflict of interest: The authors have declared that no conflict of interest exists. EDAT- 2023/08/10 18:42 MHDA- 2023/09/25 06:43 PMCR- 2023/09/22 CRDT- 2023/08/10 12:03 PHST- 2022/04/13 00:00 [received] PHST- 2023/08/08 00:00 [accepted] PHST- 2023/09/25 06:43 [medline] PHST- 2023/08/10 18:42 [pubmed] PHST- 2023/08/10 12:03 [entrez] PHST- 2023/09/22 00:00 [pmc-release] AID - 160987 [pii] AID - 10.1172/jci.insight.160987 [doi] PST - epublish SO - JCI Insight. 2023 Sep 22;8(18):e160987. doi: 10.1172/jci.insight.160987.