PMID- 37096321 OWN - NLM STAT- MEDLINE DCOM- 20230511 LR - 20230523 IS - 2050-084X (Electronic) IS - 2050-084X (Linking) VI - 12 DP - 2023 Apr 25 TI - The effects of caloric restriction on adipose tissue and metabolic health are sex- and age-dependent. LID - 10.7554/eLife.88080 [doi] LID - e88080 AB - Caloric restriction (CR) reduces the risk of age-related diseases in numerous species, including humans. CR's metabolic effects, including decreased adiposity and improved insulin sensitivity, are important for its broader health benefits; however, the extent and basis of sex differences in CR's health benefits are unknown. We found that 30% CR in young (3-month-old) male mice decreased fat mass and improved glucose tolerance and insulin sensitivity, whereas these effects were blunted or absent in young females. Females' resistance to fat loss was associated with decreased lipolysis, energy expenditure and fatty acid oxidation, and increased postprandial lipogenesis, compared to males. The sex differences in glucose homeostasis were not associated with differential glucose uptake but with altered hepatic ceramide content and substrate metabolism: compared to CR males, CR females had lower TCA cycle activity and higher blood ketone concentrations, a marker of hepatic acetyl-CoA content. This suggests that males use hepatic acetyl-CoA for the TCA cycle whereas in females it accumulates, stimulating gluconeogenesis and limiting hypoglycaemia during CR. In aged mice (18-months old), when females are anoestrus, CR decreased fat mass and improved glucose homeostasis similarly in both sexes. Finally, in a cohort of overweight and obese humans, CR-induced fat loss was also sex- and age-dependent: younger females (<45 years) resisted fat loss compared to younger males while in older subjects (>45 years) this sex difference was absent. Collectively, these studies identify age-dependent sex differences in the metabolic effects of CR and highlight adipose tissue, the liver and oestrogen as key determinants of CR's metabolic benefits. These findings have important implications for understanding the interplay between diet and health, and for maximising the benefits of CR in humans. CI - (c) 2023, Suchacki, Thomas, Ikushima et al. FAU - Suchacki, Karla J AU - Suchacki KJ AUID- ORCID: 0000-0002-4688-4126 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Thomas, Benjamin J AU - Thomas BJ AUID- ORCID: 0000-0001-8344-5256 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Ikushima, Yoshiko M AU - Ikushima YM AUID- ORCID: 0000-0002-9987-874X AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Chen, Kuan-Chan AU - Chen KC AUID- ORCID: 0000-0001-7653-6491 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. AD - Division of Endocrinology and Metabolism, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, Taiwan. FAU - Fyfe, Claire AU - Fyfe C AUID- ORCID: 0000-0001-6521-2651 AD - Rowett Institute, University of Aberdeen, Aberdeen, United Kingdom. FAU - Tavares, Adriana A S AU - Tavares AAS AUID- ORCID: 0000-0001-7505-9144 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. AD - Edinburgh Imaging, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Sulston, Richard J AU - Sulston RJ AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Lovdel, Andrea AU - Lovdel A AUID- ORCID: 0000-0002-4262-8491 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Woodward, Holly J AU - Woodward HJ AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Han, Xuan AU - Han X AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Mattiucci, Domenico AU - Mattiucci D AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Brain, Eleanor J AU - Brain EJ AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Alcaide-Corral, Carlos J AU - Alcaide-Corral CJ AUID- ORCID: 0000-0002-3002-0649 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. AD - Edinburgh Imaging, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Kobayashi, Hiroshi AU - Kobayashi H AUID- ORCID: 0000-0002-0924-1252 AD - Department of Stem Cell Biology, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan. FAU - Gray, Gillian A AU - Gray GA AUID- ORCID: 0000-0003-3104-3305 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Whitfield, Phillip D AU - Whitfield PD AUID- ORCID: 0000-0002-0814-4119 AD - Division of Biomedical Sciences, University of the Highlands and Islands, Centre for Health Sciences, Inverness, United Kingdom. AD - Institute of Infection, Immunity & Inflammation, University of Glasgow, Glasgow, United Kingdom. FAU - Stimson, Roland H AU - Stimson RH AUID- ORCID: 0000-0002-9002-6188 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Morton, Nicholas M AU - Morton NM AUID- ORCID: 0000-0001-8218-8462 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. FAU - Johnstone, Alexandra M AU - Johnstone AM AUID- ORCID: 0000-0002-5484-292X AD - Rowett Institute, University of Aberdeen, Aberdeen, United Kingdom. FAU - Cawthorn, William P AU - Cawthorn WP AUID- ORCID: 0000-0001-7832-5057 AD - University/BHF Centre for Cardiovascular Science, University of Edinburgh, The Queen's Medical Research Institute, Edinburgh BioQuarter, Edinburgh, United Kingdom. LA - eng SI - GEO/GSE230402 GR - MR/M021394/1/MRC_/Medical Research Council/United Kingdom GR - RG/16/10/32375/BHF_/British Heart Foundation/United Kingdom GR - WT_/Wellcome Trust/United Kingdom PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20230425 PL - England TA - Elife JT - eLife JID - 101579614 RN - 72-89-9 (Acetyl Coenzyme A) RN - IY9XDZ35W2 (Glucose) SB - IM UOF - doi: 10.1101/2022.02.20.481222 MH - Humans MH - Male MH - Female MH - Mice MH - Animals MH - Aged MH - Middle Aged MH - Infant MH - *Caloric Restriction MH - *Insulin Resistance MH - Weight Loss MH - Acetyl Coenzyme A MH - Adipose Tissue/metabolism MH - Obesity MH - Glucose/metabolism PMC - PMC10171869 OTO - NOTNLM OT - adipose tissue OT - caloric restriction OT - glucose homeostasis OT - healthy ageing OT - human OT - insulin sensitivity OT - medicine OT - mouse OT - sex differences COIS- KS, BT, YI, KC, CF, AT, RS, AL, HW, XH, DM, EB, CA, HK, GG, PW, RS, NM, AJ, WC No competing interests declared EDAT- 2023/04/25 06:42 MHDA- 2023/05/11 06:42 PMCR- 2023/04/25 CRDT- 2023/04/25 02:52 PHST- 2023/03/24 00:00 [received] PHST- 2023/03/26 00:00 [accepted] PHST- 2023/05/11 06:42 [medline] PHST- 2023/04/25 06:42 [pubmed] PHST- 2023/04/25 02:52 [entrez] PHST- 2023/04/25 00:00 [pmc-release] AID - 88080 [pii] AID - 10.7554/eLife.88080 [doi] PST - epublish SO - Elife. 2023 Apr 25;12:e88080. doi: 10.7554/eLife.88080.