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Wu LE, Fiveash CE, Bentley NL, Kang M, Govindaraju H, Barbour JA, Wilkins BP, Hancock SE, Madawala R, Das A, Massudi H, Li C, Kim L, Wong ASA, Marinova MB, Sultani G, Das A, Youngson NA, Le Couteur DG, Sinclair DA, Turner N. SIRT2 transgenic over-expression does not impact lifespan in mice. Aging Cell 2023; 22:e14027. [PMID: 38009412 PMCID: PMC10726910 DOI: 10.1111/acel.14027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 10/10/2023] [Accepted: 10/16/2023] [Indexed: 11/28/2023] Open
Abstract
The NAD+ -dependent deacylase family of sirtuin enzymes have been implicated in biological ageing, late-life health and overall lifespan, though of these members, a role for sirtuin-2 (SIRT2) is less clear. Transgenic overexpression of SIRT2 in the BubR1 hypomorph model of progeria can rescue many aspects of health and increase overall lifespan, due to a specific interaction between SIRT2 and BubR1 that improves the stability of this protein. It is less clear whether SIRT2 is relevant to biological ageing outside of a model where BubR1 is under-expressed. Here, we sought to test whether SIRT2 over-expression would impact the overall health and lifespan of mice on a nonprogeroid, wild-type background. While we previously found that SIRT2 transgenic overexpression prolonged female fertility, here, we did not observe any additional impact on health or lifespan, which was measured in both male and female mice on standard chow diets, and in males challenged with a high-fat diet. At the biochemical level, NMR studies revealed an increase in total levels of a number of metabolites in the brain of SIRT2-Tg animals, pointing to a potential impact in cell composition; however, this did not translate into functional differences. Overall, we conclude that strategies to enhance SIRT2 protein levels may not lead to increased longevity.
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Affiliation(s)
- Lindsay E. Wu
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Corrine E. Fiveash
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | | | - Myung‐Jin Kang
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Hemna Govindaraju
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
- Victor Chang Cardiac Research InstituteDarlinghurstNew South WalesAustralia
| | - Jayne A. Barbour
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Brendan P. Wilkins
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Sarah E. Hancock
- Victor Chang Cardiac Research InstituteDarlinghurstNew South WalesAustralia
| | - Romanthi Madawala
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Abhijit Das
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
- School of PsychologyUNSW SydneyKensingtonNew South WalesAustralia
| | - Hassina Massudi
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Catherine Li
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Lynn‐Jee Kim
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Ashley S. A. Wong
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Maria B. Marinova
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Ghazal Sultani
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Abhirup Das
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - Neil A. Youngson
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
| | - David G. Le Couteur
- ANZAC Medical Research InstituteConcordNew South WalesAustralia
- Charles Perkins CentreThe University of SydneySydneyNew South WalesAustralia
| | - David A. Sinclair
- Department of Genetics, Blavatnik InstitutePaul F. Glenn Center for Biology of Aging Research, Harvard Medical SchoolBostonMassachusettsUnited States
| | - Nigel Turner
- School of Biomedical SciencesUNSW SydneyKensingtonNew South WalesAustralia
- Victor Chang Cardiac Research InstituteDarlinghurstNew South WalesAustralia
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Montgomery MK, Osborne B, Brandon AE, O'Reilly L, Fiveash CE, Brown SHJ, Wilkins BP, Samsudeen A, Yu J, Devanapalli B, Hertzog A, Tolun AA, Kavanagh T, Cooper AA, Mitchell TW, Biden TJ, Smith NJ, Cooney GJ, Turner N. Regulation of mitochondrial metabolism in murine skeletal muscle by the medium-chain fatty acid receptor Gpr84. FASEB J 2019; 33:12264-12276. [PMID: 31415180 DOI: 10.1096/fj.201900234r] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Fatty acid receptors have been recognized as important players in glycaemic control. This study is the first to describe a role for the medium-chain fatty acid (MCFA) receptor G-protein-coupled receptor (Gpr) 84 in skeletal muscle mitochondrial function and insulin secretion. We are able to show that Gpr84 is highly expressed in skeletal muscle and adipose tissue. Mice with global deletion of Gpr84 [Gpr84 knockout (KO)] exhibit a mild impairment in glucose tolerance when fed a MCFA-enriched diet. Studies in mice and pancreatic islets suggest that glucose intolerance is accompanied by a defect in insulin secretion. MCFA-fed KO mice also exhibit a significant impairment in the intrinsic respiratory capacity of their skeletal muscle mitochondria, but at the same time also exhibit a substantial increase in mitochondrial content. Changes in canonical pathways of mitochondrial biogenesis and turnover are unable to explain these mitochondrial differences. Our results show that Gpr84 plays a crucial role in regulating mitochondrial function and quality control.-Montgomery, M. K., Osborne, B., Brandon, A. E., O'Reilly, L., Fiveash, C. E., Brown, S. H. J., Wilkins, B. P., Samsudeen, A., Yu, J., Devanapalli, B., Hertzog, A., Tolun, A. A., Kavanagh, T., Cooper, A. A., Mitchell, T. W., Biden, T. J., Smith, N. J., Cooney, G. J., Turner, N. Regulation of mitochondrial metabolism in murine skeletal muscle by the medium-chain fatty acid receptor Gpr84.
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Affiliation(s)
- Magdalene K Montgomery
- Department of Pharmacology, School of Medical Sciences, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia.,Department of Physiology, School of Biomedical Sciences, University of Melbourne, Melbourne, Victoria, Australia
| | - Brenna Osborne
- Department of Pharmacology, School of Medical Sciences, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
| | - Amanda E Brandon
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Liam O'Reilly
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, New South Wales, Australia
| | - Corrine E Fiveash
- Department of Pharmacology, School of Medical Sciences, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
| | - Simon H J Brown
- School of Biological Sciences, University of Wollongong, Wollongong, New South Wales, Australia.,Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia
| | - Brendan P Wilkins
- Department of Pharmacology, School of Medical Sciences, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia.,Division of Molecular Cardiology and Biophysics, Victor Chang Cardiac Research Institute, Sydney, New South Wales, Australia
| | - Azrah Samsudeen
- Department of Pharmacology, School of Medical Sciences, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
| | - Josephine Yu
- Department of Pharmacology, School of Medical Sciences, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
| | - Beena Devanapalli
- New South Wales (NSW) Biochemical Genetics Laboratory, Sydney Children's Hospital Network, Westmead, New South Wales, Australia
| | - Ashley Hertzog
- New South Wales (NSW) Biochemical Genetics Laboratory, Sydney Children's Hospital Network, Westmead, New South Wales, Australia
| | - Adviye A Tolun
- New South Wales (NSW) Biochemical Genetics Laboratory, Sydney Children's Hospital Network, Westmead, New South Wales, Australia.,Discipline of Genomic Medicine, and Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.,Discipline of Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
| | - Tomas Kavanagh
- Neuroscience Division, Garvan Institute of Medical Research, Sydney, New South Wales, Australia
| | - Antony A Cooper
- Neuroscience Division, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
| | - Todd W Mitchell
- Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia.,School of Medicine, University of Wollongong, Wollongong, New South Wales, Australia
| | - Trevor J Biden
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
| | - Nicola J Smith
- Division of Molecular Cardiology and Biophysics, Victor Chang Cardiac Research Institute, Sydney, New South Wales, Australia.,St. Vincent's Clinical School, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
| | - Gregory J Cooney
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,Charles Perkins Centre, University of Sydney, Sydney, New South Wales, Australia
| | - Nigel Turner
- Department of Pharmacology, School of Medical Sciences, University of New South Wales (UNSW) Sydney, Sydney, New South Wales, Australia
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Bentley NL, Fiveash CE, Osborne B, Quek LE, Ogura M, Inagaki N, Cooney GJ, Polly P, Montgomery MK, Turner N. Protein hypoacylation induced by Sirt5 overexpression has minimal metabolic effect in mice. Biochem Biophys Res Commun 2018; 503:1349-1355. [PMID: 30017194 DOI: 10.1016/j.bbrc.2018.07.047] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 07/10/2018] [Indexed: 12/27/2022]
Abstract
Sirtuins are a family of evolutionary conserved enzymes that dynamically regulate cellular physiology. Mammals have 7 sirtuins, which are located in different cellular compartments. Sirt5, a sirtuin isoform located in multiple subcellular sites, is involved in regulating a diverse range of cellular and metabolic processes through the removal of a range of acyl-lysine modifications on target proteins. Loss of Sirt5 leads to hyper-malonylation and hyper-succinylation of both mitochondrial and extra-mitochondrial proteins, influencing oxidative phosphorylation, the TCA cycle and glycolysis. However despite these findings, the effect of Sirt5 overexpression on metabolism remains poorly investigated. Here we report that overexpression of Sirt5 has minimal effect on mitochondrial metabolism and overall physiology in mice, despite inducing widespread decreases in protein acylation. Our data confirms the role of Sirt5 as an important demalonylase and desuccinylase enzyme in vivo, but questions the relevance of physiological changes in protein acylation levels in the regulation of cellular metabolism.
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Affiliation(s)
- Nicholas L Bentley
- Department of Pharmacology, School of Medical Sciences, UNSW Sydney, Australia; Department of Pathology, School of Medical Sciences, UNSW Sydney, Australia
| | - Corrine E Fiveash
- Department of Pharmacology, School of Medical Sciences, UNSW Sydney, Australia
| | - Brenna Osborne
- Department of Pharmacology, School of Medical Sciences, UNSW Sydney, Australia
| | - Lake-Ee Quek
- School of Mathematics and Statistics, The University of Sydney, Sydney, Australia
| | - Masahito Ogura
- Department of Diabetes, Endocrinology and Nutrition, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Nobuya Inagaki
- Department of Diabetes, Endocrinology and Nutrition, 54 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Gregory J Cooney
- Faculty of Medicine and Health, Charles Perkins Centre, University of Sydney, Sydney, Australia
| | - Patsie Polly
- Department of Pathology, School of Medical Sciences, UNSW Sydney, Australia
| | | | - Nigel Turner
- Department of Pharmacology, School of Medical Sciences, UNSW Sydney, Australia.
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4
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Montgomery MK, Brown SHJ, Lim XY, Fiveash CE, Osborne B, Bentley NL, Braude JP, Mitchell TW, Coster ACF, Don AS, Cooney GJ, Schmitz-Peiffer C, Turner N. Regulation of glucose homeostasis and insulin action by ceramide acyl-chain length: A beneficial role for very long-chain sphingolipid species. Biochim Biophys Acta Mol Cell Biol Lipids 2016; 1861:1828-1839. [PMID: 27591968 DOI: 10.1016/j.bbalip.2016.08.016] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 08/18/2016] [Accepted: 08/29/2016] [Indexed: 12/13/2022]
Abstract
In a recent study, we showed that in response to high fat feeding C57BL/6, 129X1, DBA/2 and FVB/N mice all developed glucose intolerance, while BALB/c mice displayed minimal deterioration in glucose tolerance and insulin action. Lipidomic analysis of livers across these five strains has revealed marked strain-specific differences in ceramide (Cer) and sphingomyelin (SM) species with high-fat feeding; with increases in C16-C22 (long-chain) and reductions in C>22 (very long-chain) Cer and SM species observed in the four strains that developed HFD-induced glucose intolerance. Intriguingly, the opposite pattern was observed in sphingolipid species in BALB/c mice. These strain-specific changes in sphingolipid acylation closely correlated with ceramide synthase 2 (CerS2) protein content and activity, with reduced CerS2 levels/activity observed in glucose intolerant strains and increased content in BALB/c mice. Overexpression of CerS2 in primary mouse hepatocytes induced a specific elevation in very long-chain Cer, but despite the overall increase in ceramide abundance, there was a substantial improvement in insulin signal transduction, as well as decreased ER stress and gluconeogenic markers. Overall our findings suggest that very long-chain sphingolipid species exhibit a protective role against the development of glucose intolerance and hepatic insulin resistance.
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Affiliation(s)
- Magdalene K Montgomery
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - Simon H J Brown
- School of Medicine, University of Wollongong, Wollongong, NSW, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
| | - Xin Y Lim
- Prince of Wales Clinical School, UNSW Australia, Sydney, NSW, Australia
| | - Corrine E Fiveash
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - Brenna Osborne
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - Nicholas L Bentley
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - Jeremy P Braude
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - Todd W Mitchell
- School of Medicine, University of Wollongong, Wollongong, NSW, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
| | - Adelle C F Coster
- School of Mathematics and Statistics, UNSW Australia, Sydney, NSW, Australia
| | - Anthony S Don
- Prince of Wales Clinical School, UNSW Australia, Sydney, NSW, Australia
| | - Gregory J Cooney
- Diabetes & Metabolism Division, Garvan Institute of Medical Research, Darlinghurst, NSW, Australia; St Vincent's Clinical School, UNSW Australia, Sydney, NSW, Australia
| | - Carsten Schmitz-Peiffer
- Diabetes & Metabolism Division, Garvan Institute of Medical Research, Darlinghurst, NSW, Australia; St Vincent's Clinical School, UNSW Australia, Sydney, NSW, Australia
| | - Nigel Turner
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia.
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5
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Montgomery MK, Fiveash CE, Braude JP, Osborne B, Brown SHJ, Mitchell TW, Turner N. Disparate metabolic response to fructose feeding between different mouse strains. Sci Rep 2015; 5:18474. [PMID: 26690387 PMCID: PMC4686880 DOI: 10.1038/srep18474] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 11/19/2015] [Indexed: 02/06/2023] Open
Abstract
Diets enriched in fructose (FR) increase lipogenesis in the liver, leading to hepatic lipid accumulation and the development of insulin resistance. Previously, we have shown that in contrast to other mouse strains, BALB/c mice are resistant to high fat diet-induced metabolic deterioration, potentially due to a lack of ectopic lipid accumulation in the liver. In this study we have compared the metabolic response of BALB/c and C57BL/6 (BL6) mice to a fructose-enriched diet. Both strains of mice increased adiposity in response to FR-feeding, while only BL6 mice displayed elevated hepatic triglyceride (TAG) accumulation and glucose intolerance. The lack of hepatic TAG accumulation in BALB/c mice appeared to be linked to an altered balance between lipogenic and lipolytic pathways, while the protection from fructose-induced glucose intolerance in this strain was likely related to low levels of ER stress, a slight elevation in insulin levels and an altered profile of diacylglycerol species in the liver. Collectively these findings highlight the multifactorial nature of metabolic defects that develop in response to changes in the intake of specific nutrients and the divergent response of different mouse strains to dietary challenges.
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Affiliation(s)
- M K Montgomery
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - C E Fiveash
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - J P Braude
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - B Osborne
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
| | - S H J Brown
- School of Health Sciences, University of Wollongong, Wollongong, NSW, Australia.,Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
| | - T W Mitchell
- School of Health Sciences, University of Wollongong, Wollongong, NSW, Australia.,Illawarra Health and Medical Research Institute, University of Wollongong, Wollongong, NSW, Australia
| | - N Turner
- Department of Pharmacology, School of Medical Sciences, UNSW Australia, Sydney, NSW, Australia
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