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Amar D, Gay NR, Jimenez-Morales D, Jean Beltran PM, Ramaker ME, Raja AN, Zhao B, Sun Y, Marwaha S, Gaul DA, Hershman SG, Ferrasse A, Xia A, Lanza I, Fernández FM, Montgomery SB, Hevener AL, Ashley EA, Walsh MJ, Sparks LM, Burant CF, Rector RS, Thyfault J, Wheeler MT, Goodpaster BH, Coen PM, Schenk S, Bodine SC, Lindholm ME. The mitochondrial multi-omic response to exercise training across rat tissues. Cell Metab 2024; 36:1411-1429.e10. [PMID: 38701776 PMCID: PMC11152996 DOI: 10.1016/j.cmet.2023.12.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 09/27/2023] [Accepted: 12/15/2023] [Indexed: 05/05/2024]
Abstract
Mitochondria have diverse functions critical to whole-body metabolic homeostasis. Endurance training alters mitochondrial activity, but systematic characterization of these adaptations is lacking. Here, the Molecular Transducers of Physical Activity Consortium mapped the temporal, multi-omic changes in mitochondrial analytes across 19 tissues in male and female rats trained for 1, 2, 4, or 8 weeks. Training elicited substantial changes in the adrenal gland, brown adipose, colon, heart, and skeletal muscle. The colon showed non-linear response dynamics, whereas mitochondrial pathways were downregulated in brown adipose and adrenal tissues. Protein acetylation increased in the liver, with a shift in lipid metabolism, whereas oxidative proteins increased in striated muscles. Exercise-upregulated networks were downregulated in human diabetes and cirrhosis. Knockdown of the central network protein 17-beta-hydroxysteroid dehydrogenase 10 (HSD17B10) elevated oxygen consumption, indicative of metabolic stress. We provide a multi-omic, multi-tissue, temporal atlas of the mitochondrial response to exercise training and identify candidates linked to mitochondrial dysfunction.
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Affiliation(s)
- David Amar
- Stanford University, Stanford, CA, USA; Insitro, San Francisco, CA, USA
| | | | | | | | | | | | | | - Yifei Sun
- Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | | | - David A Gaul
- Georgia Institute of Technology, Atlanta, GA, USA
| | | | | | - Ashley Xia
- National Institutes of Health, Bethesda, MD, USA
| | | | | | | | | | | | - Martin J Walsh
- Icahn School of Medicine at Mount Sinai, New York City, NY, USA
| | - Lauren M Sparks
- Translational Research Institute AdventHealth, Orlando, FL, USA
| | | | | | - John Thyfault
- University of Kansas Medical Center, Kansas City, KS, USA
| | | | | | - Paul M Coen
- Translational Research Institute AdventHealth, Orlando, FL, USA
| | - Simon Schenk
- University of California, San Diego, La Jolla, CA, USA
| | - Sue C Bodine
- Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
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Karasawa T, Hee Choi R, Meza CA, Maschek JA, Cox JE, Funai K. Skeletal muscle PGC-1α remodels mitochondrial phospholipidome but does not alter energy efficiency for ATP synthesis. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.22.595374. [PMID: 38826268 PMCID: PMC11142218 DOI: 10.1101/2024.05.22.595374] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2024]
Abstract
Background Exercise training is thought to improve the mitochondrial energy efficiency of skeletal muscle. Some studies suggest exercise training increases the efficiency for ATP synthesis by oxidative phosphorylation (OXPHOS), but the molecular mechanisms are unclear. We have previously shown that exercise remodels the lipid composition of mitochondrial membranes, and some of these changes could contribute to improved OXPHOS efficiency (ATP produced by O2 consumed or P/O). Peroxisome proliferator-activated receptor gamma coactivator-1 alpha (PGC-1α) is a transcriptional co-activator that coordinately regulates exercise-induced adaptations including mitochondria. We hypothesized that increased PGC-1α activity is sufficient to remodel mitochondrial membrane lipids and promote energy efficiency. Methods Mice with skeletal muscle-specific overexpression of PGC-1α (MCK-PGC-1α) and their wildtype littermates were used for this study. Lipid mass spectrometry and quantitative PCR were used to assess muscle mitochondrial lipid composition and their biosynthesis pathway. The abundance of OXPHOS enzymes was determined by western blot assay. High-resolution respirometry and fluorometry analysis were used to characterize mitochondrial bioenergetics (ATP production, O2 consumption, and P/O) for permeabilized fibers and isolated mitochondria. Results Lipidomic analyses of skeletal muscle mitochondria from wildtype and MCK-PGC-1α mice revealed that PGC-1α increases the concentrations of cone-shaped lipids such as phosphatidylethanolamine (PE), cardiolipin (CL), and lysophospholipids, while decreases the concentrations of phosphatidylcholine (PC), phosphatidylinositol (PI) and phosphatidic acid (PA). However, while PGC-1α overexpression increased the abundance of OXPHOS enzymes in skeletal muscle and the rate of O2 consumption (JO2), P/O values were unaffected with PGC-1α in permeabilized fibers or isolated mitochondria. Conclusions Collectively, overexpression of PGC-1α promotes the biosynthesis of mitochondrial PE and CL but neither PGC-1α nor the mitochondrial membrane lipid remodeling induced in MCK-PGC-1α mice is sufficient to increase the efficiency for mitochondrial ATP synthesis. These findings suggest that exercise training may increase OXPHOS efficiency by a PGC-1α-independent mechanism, and question the hypothesis that mitochondrial lipids directly affect OXPHOS enzymes to improve efficiency for ATP synthesis.
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Affiliation(s)
- Takuya Karasawa
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
- Research Institute for Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Ran Hee Choi
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
| | - Cesar A. Meza
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
| | - J. Alan Maschek
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Metabolomics Core Research Facility, University of Utah, Utah, United States
| | - James E. Cox
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Metabolomics Core Research Facility, University of Utah, Utah, United States
| | - Katsuhiko Funai
- Diabetes & Metabolism Research Center, University of Utah, Utah, United States
- Department of Nutrition & Integrative Physiology, University of Utah, Utah, United States
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3
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Siripoksup P, Cao G, Cluntun AA, Maschek JA, Pearce Q, Brothwell MJ, Jeong MY, Eshima H, Ferrara PJ, Opurum PC, Mahmassani ZS, Peterlin AD, Watanabe S, Walsh MA, Taylor EB, Cox JE, Drummond MJ, Rutter J, Funai K. Sedentary behavior in mice induces metabolic inflexibility by suppressing skeletal muscle pyruvate metabolism. J Clin Invest 2024; 134:e167371. [PMID: 38652544 PMCID: PMC11142742 DOI: 10.1172/jci167371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 04/16/2024] [Indexed: 04/25/2024] Open
Abstract
Carbohydrates and lipids provide the majority of substrates to fuel mitochondrial oxidative phosphorylation. Metabolic inflexibility, defined as an impaired ability to switch between these fuels, is implicated in a number of metabolic diseases. Here, we explore the mechanism by which physical inactivity promotes metabolic inflexibility in skeletal muscle. We developed a mouse model of sedentariness, small mouse cage (SMC), that, unlike other classic models of disuse in mice, faithfully recapitulated metabolic responses that occur in humans. Bioenergetic phenotyping of skeletal muscle mitochondria displayed metabolic inflexibility induced by physical inactivity, demonstrated by a reduction in pyruvate-stimulated respiration (JO2) in the absence of a change in palmitate-stimulated JO2. Pyruvate resistance in these mitochondria was likely driven by a decrease in phosphatidylethanolamine (PE) abundance in the mitochondrial membrane. Reduction in mitochondrial PE by heterozygous deletion of phosphatidylserine decarboxylase (PSD) was sufficient to induce metabolic inflexibility measured at the whole-body level, as well as at the level of skeletal muscle mitochondria. Low mitochondrial PE in C2C12 myotubes was sufficient to increase glucose flux toward lactate. We further implicate that resistance to pyruvate metabolism is due to attenuated mitochondrial entry via mitochondrial pyruvate carrier (MPC). These findings suggest a mechanism by which mitochondrial PE directly regulates MPC activity to modulate metabolic flexibility in mice.
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Affiliation(s)
- Piyarat Siripoksup
- Diabetes & Metabolism Research Center
- Department of Physical Therapy and Athletic Training
| | - Guoshen Cao
- Diabetes & Metabolism Research Center
- Department of Biochemistry
| | | | - J. Alan Maschek
- Metabolomics Core Research Facility
- Department of Nutrition & Integrative Physiology, and
| | | | - Marisa J. Brothwell
- Diabetes & Metabolism Research Center
- Department of Nutrition & Integrative Physiology, and
| | - Mi-Young Jeong
- Diabetes & Metabolism Research Center
- Department of Biochemistry
| | - Hiroaki Eshima
- Diabetes & Metabolism Research Center
- Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Patrick J. Ferrara
- Diabetes & Metabolism Research Center
- Department of Nutrition & Integrative Physiology, and
| | - Precious C. Opurum
- Diabetes & Metabolism Research Center
- Department of Nutrition & Integrative Physiology, and
| | - Ziad S. Mahmassani
- Diabetes & Metabolism Research Center
- Department of Physical Therapy and Athletic Training
- Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Alek D. Peterlin
- Diabetes & Metabolism Research Center
- Department of Nutrition & Integrative Physiology, and
| | - Shinya Watanabe
- Diabetes & Metabolism Research Center
- Department of Nutrition & Integrative Physiology, and
| | - Maureen A. Walsh
- Diabetes & Metabolism Research Center
- Department of Physical Therapy and Athletic Training
| | - Eric B. Taylor
- Fraternal Order of Eagles Diabetes Research Center, University of Iowa, Iowa City, Iowa, USA
| | - James E. Cox
- Diabetes & Metabolism Research Center
- Department of Biochemistry
- Metabolomics Core Research Facility
| | - Micah J. Drummond
- Diabetes & Metabolism Research Center
- Department of Physical Therapy and Athletic Training
- Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Jared Rutter
- Diabetes & Metabolism Research Center
- Department of Biochemistry
- Howard Hughes Medical Institute, University of Utah, Salt Lake City, Utah, USA
| | - Katsuhiko Funai
- Diabetes & Metabolism Research Center
- Department of Physical Therapy and Athletic Training
- Department of Biochemistry
- Department of Nutrition & Integrative Physiology, and
- Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
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4
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Tamura Y, Jee E, Kouzaki K, Kotani T, Nakazato K. Monocarboxylate transporter 4 deficiency enhances high-intensity interval training-induced metabolic adaptations in skeletal muscle. J Physiol 2024; 602:1313-1340. [PMID: 38513062 DOI: 10.1113/jp285719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Accepted: 02/29/2024] [Indexed: 03/23/2024] Open
Abstract
High-intensity exercise stimulates glycolysis, subsequently leading to elevated lactate production within skeletal muscle. While lactate produced within the muscle is predominantly released into the circulation via the monocarboxylate transporter 4 (MCT4), recent research underscores lactate's function as an intercellular and intertissue signalling molecule. However, its specific intracellular roles within muscle cells remains less defined. In this study, our objective was to elucidate the effects of increased intramuscular lactate accumulation on skeletal muscle adaptation to training. To achieve this, we developed MCT4 knockout mice and confirmed that a lack of MCT4 indeed results in pronounced lactate accumulation in skeletal muscle during high-intensity exercise. A key finding was the significant enhancement in endurance exercise capacity at high intensities when MCT4 deficiency was paired with high-intensity interval training (HIIT). Furthermore, metabolic adaptations supportive of this enhanced exercise capacity were evident with the combination of MCT4 deficiency and HIIT. Specifically, we observed a substantial uptick in the activity of glycolytic enzymes, notably hexokinase, glycogen phosphorylase and pyruvate kinase. The mitochondria also exhibited heightened pyruvate oxidation capabilities, as evidenced by an increase in oxygen consumption when pyruvate served as the substrate. This mitochondrial adaptation was further substantiated by elevated pyruvate dehydrogenase activity, increased activity of isocitrate dehydrogenase - the rate-limiting enzyme in the TCA cycle - and enhanced function of cytochrome c oxidase, pivotal to the electron transport chain. Our findings provide new insights into the physiological consequences of lactate accumulation in skeletal muscle during high-intensity exercises, deepening our grasp of the molecular intricacies underpinning exercise adaptation. KEY POINTS: We pioneered a unique line of monocarboxylate transporter 4 (MCT4) knockout mice specifically tailored to the ICR strain, an optimal background for high-intensity exercise studies. A deficiency in MCT4 exacerbates the accumulation of lactate in skeletal muscle during high-intensity exercise. Pairing MCT4 deficiency with high-intensity interval training (HIIT) results in a synergistic boost in high-intensity exercise capacity, observable both at the organismal level (via a treadmill running test) and at the muscle tissue level (through an ex vivo muscle contractile function test). Coordinating MCT4 deficiency with HIIT enhances both the glycolytic enzyme activities and mitochondrial capacity to oxidize pyruvate.
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Affiliation(s)
- Yuki Tamura
- Faculty of Sport Science, Nippon Sport Science University, Tokyo, Japan
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
- Research Institute for Sport Science, Nippon Sport Science University, Tokyo, Japan
- Sport Training Center, Nippon Sport Science University, Tokyo, Japan
- High Performance Center, Nippon Sport Science University, Tokyo, Japan
- Center for Coaching Excellence, Nippon Sport Science University, Tokyo, Japan
| | - Eunbin Jee
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Karina Kouzaki
- Research Institute for Sport Science, Nippon Sport Science University, Tokyo, Japan
- Faculty of Medical Science, Nippon Sport Science University, Tokyo, Japan
- Graduate School of Medical and Health Science, Nippon Sport Science University, Tokyo, Japan
| | - Takaya Kotani
- Research Institute for Sport Science, Nippon Sport Science University, Tokyo, Japan
| | - Koichi Nakazato
- Graduate School of Health and Sport Science, Nippon Sport Science University, Tokyo, Japan
- Research Institute for Sport Science, Nippon Sport Science University, Tokyo, Japan
- Faculty of Medical Science, Nippon Sport Science University, Tokyo, Japan
- Graduate School of Medical and Health Science, Nippon Sport Science University, Tokyo, Japan
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5
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Huang Y, Ji W, Zhang J, Huang Z, Ding A, Bai H, Peng B, Huang K, Du W, Zhao T, Li L. The involvement of the mitochondrial membrane in drug delivery. Acta Biomater 2024; 176:28-50. [PMID: 38280553 DOI: 10.1016/j.actbio.2024.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/23/2023] [Accepted: 01/18/2024] [Indexed: 01/29/2024]
Abstract
Treatment effectiveness and biosafety are critical for disease therapy. Bio-membrane modification facilitates the homologous targeting of drugs in vivo by exploiting unique antibodies or antigens, thereby enhancing therapeutic efficacy while ensuring biosafety. To further enhance the precision of disease treatment, future research should shift focus from targeted cellular delivery to targeted subcellular delivery. As the cellular powerhouses, mitochondria play an indispensable role in cell growth and regulation and are closely involved in many diseases (e.g., cancer, cardiovascular, and neurodegenerative diseases). The double-layer membrane wrapped on the surface of mitochondria not only maintains the stability of their internal environment but also plays a crucial role in fundamental biological processes, such as energy generation, metabolite transport, and information communication. A growing body of evidence suggests that various diseases are tightly related to mitochondrial imbalance. Moreover, mitochondria-targeted strategies hold great potential to decrease therapeutic threshold dosage, minimize side effects, and promote the development of precision medicine. Herein, we introduce the structure and function of mitochondrial membranes, summarize and discuss the important role of mitochondrial membrane-targeting materials in disease diagnosis/treatment, and expound the advantages of mitochondrial membrane-assisted drug delivery for disease diagnosis, treatment, and biosafety. This review helps readers understand mitochondria-targeted therapies and promotes the application of mitochondrial membranes in drug delivery. STATEMENT OF SIGNIFICANCE: Bio-membrane modification facilitates the homologous targeting of drugs in vivo by exploiting unique antibodies or antigens, thereby enhancing therapeutic efficacy while ensuring biosafety. Compared to cell-targeted treatment, targeting of mitochondria for drug delivery offers higher efficiency and improved biosafety and will promote the development of precision medicine. As a natural material, the mitochondrial membrane exhibits excellent biocompatibility and can serve as a carrier for mitochondria-targeted delivery. This review provides an overview of the structure and function of mitochondrial membranes and explores the potential benefits of utilizing mitochondrial membrane-assisted drug delivery for disease treatment and biosafety. The aim of this review is to enhance readers' comprehension of mitochondrial targeted therapy and to advance the utilization of mitochondrial membrane in drug delivery.
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Affiliation(s)
- Yinghui Huang
- The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China
| | - Wenhui Ji
- The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China
| | - Jiaxin Zhang
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Ze Huang
- The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China; Future Display Institute in Xiamen, Xiamen 361005, China
| | - Aixiang Ding
- The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China
| | - Hua Bai
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Bo Peng
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE) and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Kai Huang
- Future Display Institute in Xiamen, Xiamen 361005, China
| | - Wei Du
- School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China.
| | - Tingting Zhao
- School of Basic Medical Sciences, Anhui Medical University, Hefei 230032, China.
| | - Lin Li
- The Institute of Flexible Electronics (IFE, Future Technologies), Xiamen University, Xiamen 361005, China; Future Display Institute in Xiamen, Xiamen 361005, China.
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6
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Shahtout JL, Eshima H, Ferrara PJ, Maschek JA, Cox JE, Drummond MJ, Funai K. Inhibition of the skeletal muscle Lands cycle ameliorates weakness induced by physical inactivity. J Cachexia Sarcopenia Muscle 2024; 15:319-330. [PMID: 38123161 PMCID: PMC10834354 DOI: 10.1002/jcsm.13406] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 10/12/2023] [Accepted: 11/15/2023] [Indexed: 12/23/2023] Open
Abstract
BACKGROUND Lipid hydroperoxides (LOOH) have been implicated in skeletal muscle atrophy with age and disuse. Lysophosphatidylcholine acyltransferase 3 (LPCAT3), an enzyme of the Lands cycle, conjugates a polyunsaturated fatty acyl chain to a lysophospholipid to form a polyunsaturated fatty acid containing phospholipid (PUFA-PL) molecule, providing substrates for LOOH propagation. Previous studies suggest that inhibition of the Lands cycle is an effective strategy to suppress LOOH. Mice with skeletal muscle-specific tamoxifen-inducible knockout of LPCAT3 (LPCAT3-MKO) were utilized to determine if muscle-specific attenuation of LOOH may alleviate muscle atrophy and weakness with disuse. METHODS LPCAT3-MKO and control mice underwent 7 days of sham or hindlimb unloading (HU model) to study muscle mass and force-generating capacity. LOOH was assessed by quantifying 4-hydroxynonenal (4-HNE)-conjugated peptides. Quantitative PCR and lipid mass spectrometry were used to validate LPCAT3 deletion. RESULTS Seven days of HU was sufficient to induce muscle atrophy and weakness concomitant to a ~2-fold increase in 4-HNE (P = 0.0069). Deletion of LPCAT3 reversed HU-induced increase in muscle 4-HNE (P = 0.0256). No difference was found in body mass, body composition, or caloric intake between genotypes. The soleus (SOL) and plantaris (PLANT) muscles of the LPCAT3-MKO mice experienced ~15% and ~40% less atrophy than controls, respectively. (P = 0.0011 and P = 0.0265). Type I and IIa SOL myofibers experienced a ~40% decrease in cross sectional area (CSA), which was attenuated to only 15% in the LPCAT3-MKO mice (P = 0.0170 and P = 0.0411, respectively). Strikingly, SOL muscles were fully protected and extensor digitorum longus (EDL) muscles experienced a ~35% protection from HU-induced reduction in force-generating capacity in the LPCAT3-MKO mice compared with controls (P < 0.0001 for both muscles). CONCLUSIONS Our findings demonstrate that attenuation of skeletal muscle lipid hydroperoxides is sufficient to restore its function, in particular a protection from reduction in muscle specific force. Our findings suggest muscle lipid peroxidation contributes to atrophy and weakness induced by disuse in mice.
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Affiliation(s)
- Justin L. Shahtout
- Diabetes and Metabolism Research CenterUniversity of UtahSalt Lake CityUtahUSA
- Department of Physical Therapy and Athletic TrainingUniversity of UtahSalt Lake CityUtahUSA
| | - Hiroaki Eshima
- Diabetes and Metabolism Research CenterUniversity of UtahSalt Lake CityUtahUSA
- Molecular Medicine ProgramUniversity of UtahSalt Lake CityUtahUSA
- Nagasaki International UniversitySaseboJapan
| | - Patrick J. Ferrara
- Diabetes and Metabolism Research CenterUniversity of UtahSalt Lake CityUtahUSA
- Molecular Medicine ProgramUniversity of UtahSalt Lake CityUtahUSA
| | - J. Alan Maschek
- Diabetes and Metabolism Research CenterUniversity of UtahSalt Lake CityUtahUSA
- Metabolomics, Mass Spectrometry, and Proteomics CoreUniversity of UtahSalt Lake CityUtahUSA
| | - James E. Cox
- Diabetes and Metabolism Research CenterUniversity of UtahSalt Lake CityUtahUSA
- Metabolomics, Mass Spectrometry, and Proteomics CoreUniversity of UtahSalt Lake CityUtahUSA
- Department of BiochemistryUniversity of UtahSalt Lake CityUtahUSA
| | - Micah J. Drummond
- Diabetes and Metabolism Research CenterUniversity of UtahSalt Lake CityUtahUSA
- Department of Physical Therapy and Athletic TrainingUniversity of UtahSalt Lake CityUtahUSA
- Molecular Medicine ProgramUniversity of UtahSalt Lake CityUtahUSA
- Department of Nutrition and Integrative PhysiologyUniversity of UtahSalt Lake CityUtahUSA
| | - Katsuhiko Funai
- Diabetes and Metabolism Research CenterUniversity of UtahSalt Lake CityUtahUSA
- Department of Physical Therapy and Athletic TrainingUniversity of UtahSalt Lake CityUtahUSA
- Molecular Medicine ProgramUniversity of UtahSalt Lake CityUtahUSA
- Department of BiochemistryUniversity of UtahSalt Lake CityUtahUSA
- Department of Nutrition and Integrative PhysiologyUniversity of UtahSalt Lake CityUtahUSA
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7
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Eshima H, Johnson JM, Funai K. Lipid peroxidation does not mediate muscle atrophy induced by PSD deficiency. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.12.22.573082. [PMID: 38187526 PMCID: PMC10769360 DOI: 10.1101/2023.12.22.573082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Mechanisms by which disuse promotes skeletal muscle atrophy is not well understood. We previously demonstrated that disuse reduces the abundance of mitochondrial phosphatidylethanolamine (PE) in skeletal muscle. Deletion of phosphatidylserine decarboxylase (PSD), an enzyme that generates mitochondrial PE, was sufficient to promote muscle atrophy. In this study, we tested the hypothesis that muscle atrophy induced by PSD deletion is driven by an accumulation of lipid hydroperoxides (LOOH). Mice with muscle-specific knockout of PSD (PSD-MKO) were crossed with glutathione peroxidase 4 (GPx4) transgenic mice (GPx4Tg) to suppress the accumulation of LOOH. However, PSD-MKO × GPx4Tg mice and PSD-MKO mice demonstrated equally robust loss of muscle mass. These results suggest that muscle atrophy induced by PSD deficiency is not driven by the accumulation of LOOH.
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Affiliation(s)
- Hiroaki Eshima
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
- Department of International Tourism, Nagasaki International University
| | - Jordan M. Johnson
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
| | - Katsuhiko Funai
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
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8
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Joshi A, Richard TH, Gohil VM. Mitochondrial phospholipid metabolism in health and disease. J Cell Sci 2023; 136:jcs260857. [PMID: 37655851 PMCID: PMC10482392 DOI: 10.1242/jcs.260857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023] Open
Abstract
Studies of rare human genetic disorders of mitochondrial phospholipid metabolism have highlighted the crucial role that membrane phospholipids play in mitochondrial bioenergetics and human health. The phospholipid composition of mitochondrial membranes is highly conserved from yeast to humans, with each class of phospholipid performing a specific function in the assembly and activity of various mitochondrial membrane proteins, including the oxidative phosphorylation complexes. Recent studies have uncovered novel roles of cardiolipin and phosphatidylethanolamine, two crucial mitochondrial phospholipids, in organismal physiology. Studies on inter-organellar and intramitochondrial phospholipid transport have significantly advanced our understanding of the mechanisms that maintain mitochondrial phospholipid homeostasis. Here, we discuss these recent advances in the function and transport of mitochondrial phospholipids while describing their biochemical and biophysical properties and biosynthetic pathways. Additionally, we highlight the roles of mitochondrial phospholipids in human health by describing the various genetic diseases caused by disruptions in their biosynthesis and discuss advances in therapeutic strategies for Barth syndrome, the best-studied disorder of mitochondrial phospholipid metabolism.
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Affiliation(s)
- Alaumy Joshi
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Travis H. Richard
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
| | - Vishal M. Gohil
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX 77843, USA
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9
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Duncan RE. Deficiency of phosphatidylethanolamine synthesis: consequences for skeletal muscle. FUNCTION 2023; 4:zqad044. [PMID: 37772311 PMCID: PMC10533200 DOI: 10.1093/function/zqad044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 08/02/2023] [Indexed: 09/30/2023] Open
Affiliation(s)
- Robin Elaine Duncan
- Department of Kinesiology and Health Sciences, University of Waterloo, Waterloo, ON N2L 3G1, Canada
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10
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Shahtout JL, Eshima H, Ferrara PJ, Maschek JA, Cox JE, Drummond MJ, Funai K. Inhibition of skeletal muscle Lands cycle ameliorates weakness induced by physical inactivity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.25.550576. [PMID: 37546754 PMCID: PMC10402104 DOI: 10.1101/2023.07.25.550576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/08/2023]
Abstract
Background Lipid hydroperoxides (LOOH) have been implicated in skeletal muscle atrophy with age and disuse. Lysophosphatidylcholine acyltransferase 3 (LPCAT3), an enzyme of Lands cycle, conjugates a polyunsaturated fatty acyl chain to a lysophospholipid (PUFA-PL) molecule, providing substrates for LOOH propagation. Previous studies suggest that inhibition of Lands cycle is an effective strategy to suppress LOOH. Mice with skeletal muscle-specific tamoxifen-inducible knockout of LPCAT3 (LPCAT3-MKO) were utilized to determine if muscle-specific attenuation of LOOH may alleviate muscle atrophy and weakness with disuse. Methods LPCAT3-MKO and control mice underwent 7 days of sham or hindlimb unloading (HU model) to study muscle mass and force-generating capacity. LOOH was assessed by quantifying 4-hydroxynonenal (4-HNE)-conjugated peptides. Quantitative PCR and lipid mass spectrometry were used to validate LPCAT3 deletion. Results 7 days of HU was sufficient to induce muscle atrophy and weakness concomitant to an increase in 4-HNE. Deletion of LPCAT3 reversed HU-induced increase in muscle 4HNE. No difference was found in body mass, body composition, or caloric intake between genotypes. The soleus (SOL) and plantaris (PLANT) muscles of the LPCAT3-MKO mice were partially protected from atrophy compared to controls, concomitant to attenuated decrease in cross-sectional areas in type I and IIa fibers. Strikingly, SOL and extensor digitorum longus (EDL) were robustly protected from HU-induced reduction in force-generating capacity in the LPCAT3-MKO mice compared to controls. Conclusion Our findings demonstrate that attenuation of muscle LOOH is sufficient to restore skeletal muscle function, in particular a protection from reduction in muscle specific force. Thus, muscle LOOH contributes to atrophy and weakness induced by HU in mice.
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Affiliation(s)
- Justin L. Shahtout
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
| | - Hiroaki Eshima
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Nagasaki International University, Sasebo, Nagasaki, Japan
| | - Patrick J. Ferrara
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
| | - J. Alan Maschek
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Metabolomics, Mass Spectrometry, and Proteomics Core, University of Utah, Salt Lake City, UT. USA
| | - James E. Cox
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Metabolomics, Mass Spectrometry, and Proteomics Core, University of Utah, Salt Lake City, UT. USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Micah J. Drummond
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Katsuhiko Funai
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
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11
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Diaz-Espinosa J, Stringer KA, Rosania GR. Clofazimine-Mediated, Age-Related Changes in Skeletal Muscle Mitochondrial Metabolites. Metabolites 2023; 13:671. [PMID: 37233713 PMCID: PMC10220805 DOI: 10.3390/metabo13050671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Accepted: 05/16/2023] [Indexed: 05/27/2023] Open
Abstract
Mitochondrial health declines with age, and older patients can demonstrate dysfunction in mitochondrial-rich tissues, such as cardiac and skeletal muscle. Aged mitochondria may make older adults more susceptible to adverse drug reactions (ADRs). We assessed mitochondrial metabolic function by measuring two metabolites, l-carnitine and acetylcarnitine, to determine their effectiveness as candidate clinical biomarkers for age-related, drug-induced alterations in mitochondrial metabolism. To study age- and medication-related changes in mitochondrial metabolism, we administered the FDA-approved mitochondriotropic drug, clofazimine (CFZ), or vehicle for 8 weeks to young (4-week-old) and old (61-week-old) male C57BL/6J mice. At the end of treatment, whole blood and cardiac and skeletal muscle were analyzed for l-carnitine, acetylcarnitine, and CFZ levels; muscle function was measured via a treadmill test. No differences were found in blood or cardiac carnitine levels of CFZ-treated mice, but CFZ-treated mice displayed lost body mass and alterations in endurance and levels of skeletal muscle mitochondrial metabolites. These findings demonstrate the age-related susceptibility of the skeletal muscle to mitochondria drug toxicity. Since drug-induced alterations in mitochondrial metabolism in skeletal muscle were not reflected in the blood by l-carnitine or acetylcarnitine levels, drug-induced catabolism and changes in muscle function appear more relevant to stratifying individuals at increased risk for ADRs.
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Affiliation(s)
- Jennifer Diaz-Espinosa
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, MI 48109, USA; (J.D.-E.); (G.R.R.)
| | - Kathleen A. Stringer
- Department of Clinical Pharmacy, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, MI 48109, USA
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, School of Medicine, University of Michigan, Ann Arbor, MI 48109, USA
- Weil Institute for Critical Care Research and Innovation, University of Michigan, Ann Arbor, MI 48109, USA
| | - Gus R. Rosania
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Michigan, 428 Church Street, Ann Arbor, MI 48109, USA; (J.D.-E.); (G.R.R.)
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12
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Grapentine S, Singh RK, Bakovic M. Skeletal Muscle Consequences of Phosphatidylethanolamine Synthesis Deficiency. FUNCTION 2023; 4:zqad020. [PMID: 37342414 PMCID: PMC10278983 DOI: 10.1093/function/zqad020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 06/22/2023] Open
Abstract
The maintenance of phospholipid homeostasis is increasingly being implicated in metabolic health. Phosphatidylethanolamine (PE) is the most abundant phospholipid on the inner leaflet of cellular membranes, and we have previously shown that mice with a heterozygous ablation of the PE synthesizing enzyme, Pcyt2 (Pcyt2+/-), develop obesity, insulin resistance, and NASH. Skeletal muscle is a major determinant of systemic energy metabolism, making it a key player in metabolic disease development. Both the total PE levels and the ratio of PE to other membrane lipids in skeletal muscle are implicated in insulin resistance; however, the underlying mechanisms and the role of Pcyt2 regulation in this association remain unclear. Here, we show how reduced phospholipid synthesis due to Pcyt2 deficiency causes Pcyt2+/- skeletal muscle dysfunction and metabolic abnormalities. Pcyt2+/- skeletal muscle exhibits damage and degeneration, with skeletal muscle cell vacuolization, disordered sarcomeres, mitochondria ultrastructure irregularities and paucity, inflammation, and fibrosis. There is intramuscular adipose tissue accumulation, and major disturbances in lipid metabolism with impaired FA mobilization and oxidation, elevated lipogenesis, and long-chain fatty acyl-CoA, diacylglycerol, and triacylglycerol accumulation. Pcyt2+/- skeletal muscle exhibits perturbed glucose metabolism with elevated glycogen content, impaired insulin signaling, and reduced glucose uptake. Together, this study lends insight into the critical role of PE homeostasis in skeletal muscle metabolism and health with broad implications on metabolic disease development.
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Affiliation(s)
- Sophie Grapentine
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph N1G 2W1, Canada
| | - Rathnesh K Singh
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph N1G 2W1, Canada
| | - Marica Bakovic
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph N1G 2W1, Canada
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13
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Chen X, Liu Y, Pu J, Gui S, Wang D, Zhong X, Chen W, Tao W, Chen Y, Chen X, Xie P. Proteomics reveals mitochondrial dysfunction and energy metabolism disturbance of intestine in a nonhuman primate model of depression. J Affect Disord 2023; 333:562-570. [PMID: 37080496 DOI: 10.1016/j.jad.2023.04.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 03/22/2023] [Accepted: 04/14/2023] [Indexed: 04/22/2023]
Abstract
BACKGROUND The gut-brain axis has been shown to play an important role in depression. However, few studies have examined proteomic changes in the intestine of the nonhuman primate model of depression. METHODS We investigated the intestinal proteome of macaques (Macaca fascicularis) with depression-like (DL) behaviors by data-independent acquisition techniques. We also performed integration analyses of proteomic changes, previous metabolomic and microbiotic data. Moreover, we confirmed the gene expressions of key proteins. RESULTS Sixty-five differentially expressed proteins (DEPs) were identified, of which fifty-four DEPs were down-regulated and the others were altered conversely in DL macaques compared with the control group. Pathway analysis indicated that mitochondrial function and energy metabolism were representative functions of DEPs. The key DEPs were significantly associated with glycerophospholipid metabolism and imbalances of gut microbe. We confirmed that key molecules (NDUFB4, UQCR10, PISD) were significantly inhibited, which may disturb the energy transformation of the electron respiratory chain and the homeostasis of the mitochondrial membrane. LIMITATIONS Further research is warranted to determine the effects of depression on other peripheral organs. CONCLUSIONS These findings suggest the functional disorder of intestinal mitochondria in DL macaques. The disturbances of glycerophospholipid metabolism and gut microbiota may exacerbate disruptions of energy metabolism. Taking together, our study provides new clues to the relationship between depression and intestinal proteome.
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Affiliation(s)
- Xiaopeng Chen
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Yiyun Liu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Juncai Pu
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Siwen Gui
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Dongfang Wang
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Xiaogang Zhong
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Weiyi Chen
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Wei Tao
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Yue Chen
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Xiang Chen
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China
| | - Peng Xie
- NHC Key Laboratory of Diagnosis and Treatment on Brain Functional Diseases, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China; Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, China.
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14
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Ferrara PJ, Lang MJ, Johnson JM, Watanabe S, McLaughlin KL, Maschek JA, Verkerke AR, Siripoksup P, Chaix A, Cox JE, Fisher-Wellman KH, Funai K. Weight loss increases skeletal muscle mitochondrial energy efficiency in obese mice. LIFE METABOLISM 2023; 2:load014. [PMID: 37206438 PMCID: PMC10195096 DOI: 10.1093/lifemeta/load014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Weight loss from an overweight state is associated with a disproportionate decrease in whole-body energy expenditure that may contribute to the heightened risk for weight regain. Evidence suggests that this energetic mismatch originates from lean tissue. Although this phenomenon is well documented, the mechanisms have remained elusive. We hypothesized that increased mitochondrial energy efficiency in skeletal muscle is associated with reduced expenditure under weight loss. Wildtype (WT) male C57BL6/N mice were fed with high fat diet for 10 weeks, followed by a subset of mice that were maintained on the obesogenic diet (OB) or switched to standard chow to promote weight loss (WL) for additional 6 weeks. Mitochondrial energy efficiency was evaluated using high-resolution respirometry and fluorometry. Mass spectrometric analyses were employed to describe the mitochondrial proteome and lipidome. Weight loss promoted ~50% increase in the efficiency of oxidative phosphorylation (ATP produced per O2 consumed, or P/O) in skeletal muscle. However, weight loss did not appear to induce significant changes in mitochondrial proteome, nor any changes in respiratory supercomplex formation. Instead, it accelerated the remodeling of mitochondrial cardiolipin (CL) acyl-chains to increase tetralinoleoyl CL (TLCL) content, a species of lipids thought to be functionally critical for the respiratory enzymes. We further show that lowering TLCL by deleting the CL transacylase tafazzin was sufficient to reduce skeletal muscle P/O and protect mice from diet-induced weight gain. These findings implicate skeletal muscle mitochondrial efficiency as a novel mechanism by which weight loss reduces energy expenditure in obesity.
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Affiliation(s)
- Patrick J. Ferrara
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
| | - Marisa J. Lang
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
| | - Jordan M. Johnson
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
| | - Shinya Watanabe
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
| | - Kelsey L. McLaughlin
- East Carolina Diabetes & Obesity Institute, East Carolina University
- Department of Physiology, East Carolina University
| | - J. Alan Maschek
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
- Metabolomics Core Research Facility, University of Utah
| | - Anthony R.P. Verkerke
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
| | | | - Amandine Chaix
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
- Molecular Medicine Program, University of Utah
| | - James E. Cox
- Diabetes & Metabolism Research Center, University of Utah
- Metabolomics Core Research Facility, University of Utah
- Department of Biochemistry, University of Utah
| | - Kelsey H. Fisher-Wellman
- East Carolina Diabetes & Obesity Institute, East Carolina University
- Department of Physiology, East Carolina University
| | - Katsuhiko Funai
- Diabetes & Metabolism Research Center, University of Utah
- Department of Nutrition & Integrative Physiology, University of Utah
- Molecular Medicine Program, University of Utah
- Department of Biochemistry, University of Utah
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15
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Eshima H, Shahtout JL, Siripoksup P, Pearson MJ, Mahmassani ZS, Ferrara PJ, Lyons AW, Maschek JA, Peterlin AD, Verkerke ARP, Johnson JM, Salcedo A, Petrocelli JJ, Miranda ER, Anderson EJ, Boudina S, Ran Q, Cox JE, Drummond MJ, Funai K. Lipid hydroperoxides promote sarcopenia through carbonyl stress. eLife 2023; 12:e85289. [PMID: 36951533 PMCID: PMC10076018 DOI: 10.7554/elife.85289] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 03/22/2023] [Indexed: 03/24/2023] Open
Abstract
Reactive oxygen species (ROS) accumulation is a cardinal feature of skeletal muscle atrophy. ROS refers to a collection of radical molecules whose cellular signals are vast, and it is unclear which downstream consequences of ROS are responsible for the loss of muscle mass and strength. Here, we show that lipid hydroperoxides (LOOH) are increased with age and disuse, and the accumulation of LOOH by deletion of glutathione peroxidase 4 (GPx4) is sufficient to augment muscle atrophy. LOOH promoted atrophy in a lysosomal-dependent, proteasomal-independent manner. In young and old mice, genetic and pharmacological neutralization of LOOH or their secondary reactive lipid aldehydes robustly prevented muscle atrophy and weakness, indicating that LOOH-derived carbonyl stress mediates age- and disuse-induced muscle dysfunction. Our findings provide novel insights for the role of LOOH in sarcopenia including a therapeutic implication by pharmacological suppression.
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Affiliation(s)
- Hiroaki Eshima
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Molecular Medicine Program, University of UtahSalt Lake CityUnited States
- Department of International Tourism, Nagasaki International UniversityNagasakiJapan
| | - Justin L Shahtout
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Department of Physical Therapy & Athletic Training, University of UtahSalt Lake CityUnited States
| | - Piyarat Siripoksup
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Department of Physical Therapy & Athletic Training, University of UtahSalt Lake CityUnited States
| | | | - Ziad S Mahmassani
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Molecular Medicine Program, University of UtahSalt Lake CityUnited States
- Department of Physical Therapy & Athletic Training, University of UtahSalt Lake CityUnited States
| | - Patrick J Ferrara
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Molecular Medicine Program, University of UtahSalt Lake CityUnited States
- Department of Nutrition & Integrative Physiology, University of UtahSalt Lake CityUnited States
| | - Alexis W Lyons
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
| | - John Alan Maschek
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Department of Nutrition & Integrative Physiology, University of UtahSalt Lake CityUnited States
- Metabolomics Core Research Facility, University of UtahSalt Lake CityUnited States
| | - Alek D Peterlin
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Department of Nutrition & Integrative Physiology, University of UtahSalt Lake CityUnited States
| | - Anthony RP Verkerke
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Department of Nutrition & Integrative Physiology, University of UtahSalt Lake CityUnited States
| | - Jordan M Johnson
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Department of Nutrition & Integrative Physiology, University of UtahSalt Lake CityUnited States
| | - Anahy Salcedo
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
| | - Jonathan J Petrocelli
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Department of Physical Therapy & Athletic Training, University of UtahSalt Lake CityUnited States
| | - Edwin R Miranda
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Molecular Medicine Program, University of UtahSalt Lake CityUnited States
| | - Ethan J Anderson
- Fraternal Order of Eagles Diabetes Research Center, University of IowaIowa CityUnited States
| | - Sihem Boudina
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Molecular Medicine Program, University of UtahSalt Lake CityUnited States
- Department of Nutrition & Integrative Physiology, University of UtahSalt Lake CityUnited States
| | - Qitao Ran
- Department of Cell Systems and Anatomy, The University of Texas Health Science Center at San AntonioSan AntonioUnited States
| | - James E Cox
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Metabolomics Core Research Facility, University of UtahSalt Lake CityUnited States
- Department of Biochemistry, University of UtahSalt Lake CityUnited States
| | - Micah J Drummond
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Molecular Medicine Program, University of UtahSalt Lake CityUnited States
- Department of Physical Therapy & Athletic Training, University of UtahSalt Lake CityUnited States
| | - Katsuhiko Funai
- Diabetes and Metabolism Research Center, University of UtahSalt Lake CityUnited States
- Molecular Medicine Program, University of UtahSalt Lake CityUnited States
- Department of Physical Therapy & Athletic Training, University of UtahSalt Lake CityUnited States
- Department of Nutrition & Integrative Physiology, University of UtahSalt Lake CityUnited States
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16
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Petrocelli JJ, de Hart NM, Lang MJ, Yee EM, Ferrara PJ, Fix DK, Chaix A, Funai K, Drummond MJ. Cellular senescence and disrupted proteostasis induced by myotube atrophy are prevented with low-dose metformin and leucine cocktail. Aging (Albany NY) 2023; 15:1808-1832. [PMID: 36947713 PMCID: PMC10085594 DOI: 10.18632/aging.204600] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Accepted: 02/27/2023] [Indexed: 03/24/2023]
Abstract
Aging coincides with the accumulation of senescent cells within skeletal muscle that produce inflammatory products, known as the senescence-associated secretory phenotype, but the relationship of senescent cells to muscle atrophy is unclear. Previously, we found that a metformin + leucine (MET+LEU) treatment had synergistic effects in aged mice to improve skeletal muscle structure and function during disuse atrophy. Therefore, the study's purpose was to determine the mechanisms by which MET+LEU exhibits muscle atrophy protection in vitro and if this occurs through cellular senescence. C2C12 myoblasts differentiated into myotubes were used to determine MET+LEU mechanisms during atrophy. Additionally, aged mouse single myofibers and older human donor primary myoblasts were individually isolated to determine the translational potential of MET+LEU on muscle cells. MET+LEU (25 + 125 μM) treatment increased myotube differentiation and prevented myotube atrophy. Low concentration (0.1 + 0.5 μM) MET+LEU had unique effects to prevent muscle atrophy and increase transcripts related to protein synthesis and decrease transcripts related to protein breakdown. Myotube atrophy resulted in dysregulated proteostasis that was reversed with MET+LEU and individually with proteasome inhibition (MG-132). Inflammatory and cellular senescence transcriptional pathways and respective transcripts were increased following myotube atrophy yet reversed with MET+LEU treatment. Dasatinib + quercetin (D+Q) senolytic prevented myotube atrophy similar to MET+LEU. Finally, MET+LEU prevented loss in myotube size in alternate in vitro models of muscle atrophy as well as in aged myofibers while, in human primary myotubes, MET+LEU prevented reductions in myonuclei fusion. These data support that MET+LEU has skeletal muscle cell-autonomous properties to prevent atrophy by reversing senescence and improving proteostasis.
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Affiliation(s)
- Jonathan J. Petrocelli
- Department of Physical Therapy and Athletic, University of Utah, Salt Lake City, UT 84112, USA
| | - Naomi M.M.P. de Hart
- Department of Physical Therapy and Athletic, University of Utah, Salt Lake City, UT 84112, USA
| | - Marisa J. Lang
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT 84112, USA
| | - Elena M. Yee
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
| | - Patrick J. Ferrara
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
| | - Dennis K. Fix
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
| | - Amandine Chaix
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT 84112, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
| | - Katsuhiko Funai
- Department of Physical Therapy and Athletic, University of Utah, Salt Lake City, UT 84112, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT 84112, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
| | - Micah J. Drummond
- Department of Physical Therapy and Athletic, University of Utah, Salt Lake City, UT 84112, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT 84112, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT 84112, USA
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17
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Johnson JM, Peterlin AD, Balderas E, Sustarsic EG, Maschek JA, Lang MJ, Jara-Ramos A, Panic V, Morgan JT, Villanueva CJ, Sanchez A, Rutter J, Lodhi IJ, Cox JE, Fisher-Wellman KH, Chaudhuri D, Gerhart-Hines Z, Funai K. Mitochondrial phosphatidylethanolamine modulates UCP1 to promote brown adipose thermogenesis. SCIENCE ADVANCES 2023; 9:eade7864. [PMID: 36827367 PMCID: PMC9956115 DOI: 10.1126/sciadv.ade7864] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 01/24/2023] [Indexed: 05/08/2023]
Abstract
Thermogenesis by uncoupling protein 1 (UCP1) is one of the primary mechanisms by which brown adipose tissue (BAT) increases energy expenditure. UCP1 resides in the inner mitochondrial membrane (IMM), where it dissipates membrane potential independent of adenosine triphosphate (ATP) synthase. Here, we provide evidence that phosphatidylethanolamine (PE) modulates UCP1-dependent proton conductance across the IMM to modulate thermogenesis. Mitochondrial lipidomic analyses revealed PE as a signature molecule whose abundance bidirectionally responds to changes in thermogenic burden. Reduction in mitochondrial PE by deletion of phosphatidylserine decarboxylase (PSD) made mice cold intolerant and insensitive to β3 adrenergic receptor agonist-induced increase in whole-body oxygen consumption. High-resolution respirometry and fluorometry of BAT mitochondria showed that loss of mitochondrial PE specifically lowers UCP1-dependent respiration without compromising electron transfer efficiency or ATP synthesis. These findings were confirmed by a reduction in UCP1 proton current in PE-deficient mitoplasts. Thus, PE performs a previously unknown role as a temperature-responsive rheostat that regulates UCP1-dependent thermogenesis.
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Affiliation(s)
- Jordan M. Johnson
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Alek D. Peterlin
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Utah Center for Clinical and Translational Research, University of Utah, Salt Lake City, UT, USA
| | - Enrique Balderas
- Nora Eccles Harrison Cardiovascular Research and Training Institute, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - Elahu G. Sustarsic
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - J. Alan Maschek
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
| | - Marisa J. Lang
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
| | - Alejandro Jara-Ramos
- Nora Eccles Harrison Cardiovascular Research and Training Institute, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
| | - Vanja Panic
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Jeffrey T. Morgan
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
- Howard Hughes Medical Institute, University of Utah, Salt Lake City, UT, USA
| | - Claudio J. Villanueva
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
- Department of Integrative Biology and Physiology, University of California Los Angeles, Los Angeles, CA, USA
| | - Alejandro Sanchez
- Division of Urology, Department of Surgery, Huntsman Cancer Institute, University of Utah, Salt Lake City, UT, USA
| | - Jared Rutter
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
- Howard Hughes Medical Institute, University of Utah, Salt Lake City, UT, USA
| | - Irfan J. Lodhi
- Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, St. Louis, MO, USA
| | - James E. Cox
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Metabolomics Core Research Facility, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | | | - Dipayan Chaudhuri
- Nora Eccles Harrison Cardiovascular Research and Training Institute, Division of Cardiovascular Medicine, Department of Internal Medicine, University of Utah, Salt Lake City, UT, USA
- Department of Biochemistry, University of Utah, Salt Lake City, UT, USA
| | - Zachary Gerhart-Hines
- Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, Copenhagen, Denmark
| | - Katsuhiko Funai
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, UT, USA
- Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, UT, USA
- Molecular Medicine Program, University of Utah, Salt Lake City, UT, USA
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18
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Liu C, Zhao H, Yan Y, Yang W, Chen S, Song G, Li X, Gu Y, Yun H, Li Y. Synergistic Effect of Rhodiola rosea and Caffeine Supplementation on the Improvement of Muscle Strength and Muscular Endurance: A Pilot Study for Rats, Resistance Exercise-Untrained and -Trained Volunteers. Nutrients 2023; 15:nu15030582. [PMID: 36771289 PMCID: PMC9919529 DOI: 10.3390/nu15030582] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 01/13/2023] [Accepted: 01/17/2023] [Indexed: 01/24/2023] Open
Abstract
Multi-level studies have shown that Rhodiola rosea (RHO) and Caffeine (CAF) have the potential to be nutritional supplements to enhance physical performance in resistance exercise-untrained and -trained subjects. This study examined the synergistic effects of RHO (262.7 mg/kg for rats and 2.4 g for volunteers) and CAF (19.7 mg/kg for rats and 3 mg/kg for volunteers) supplementation on improving physical performance in rats, resistance exercise-untrained volunteers and resistance exercise-trained volunteers. Rats and volunteers were randomly grouped into placebo, CAF, RHO and CAF+RHO and administered accordingly with the nutrients during the training procedure, and pre- and post-measures were collected. We found that RHO+CAF was effective in improving forelimb grip strength (13.75%), erythropoietin (23.85%), dopamine (12.65%) and oxygen consumption rate (9.29%) in the rat model. Furthermore, the current results also indicated that the combination of RHO+CAF significantly increased the bench press one-repetition maximum (1RM) (16.59%), deep squat 1RM (15.75%), maximum voluntary isometric contraction (MVIC) (14.72%) and maximum repetitions of 60% 1RM bench press (22.15%) in resistance exercise-untrained volunteers. Additionally, despite the excellent base level of the resistance exercise-trained volunteers, their deep squat 1RM and MVIC increased substantially through the synergistic effect of RHO and CAF. In conclusion, combined supplementation of RHO+CAF is more beneficial in improving the resistance exercise performance for both resistance exercise-untrained and -trained volunteers. The present results provide practical evidence that the synergies of RHO and CAF could serve as potential supplementary for individuals, especially resistance exercise-trained subjects, to ameliorate their physical performances effectively and safely.
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Affiliation(s)
- Chang Liu
- School of Sport Science, Beijing Sport University, Beijing 100084, China
| | - Haotian Zhao
- School of Sport Science, Beijing Sport University, Beijing 100084, China
- Department of Physical Education, Jiangnan University, Wuxi 214122, China
| | - Yi Yan
- School of Sport Science, Beijing Sport University, Beijing 100084, China
| | - Weijun Yang
- School of Sport Science, Beijing Sport University, Beijing 100084, China
| | - Songyue Chen
- School of Pharmaceutical Sciences, Peking University, Beijing 100191, China
| | - Ge Song
- School of Sport Science, Beijing Sport University, Beijing 100084, China
| | - Xuehan Li
- School of Sport Science, Beijing Sport University, Beijing 100084, China
| | - Yujia Gu
- School of Sport Science, Beijing Sport University, Beijing 100084, China
| | - Hezhang Yun
- School of Sport Science, Beijing Sport University, Beijing 100084, China
- The Public Sports Department of the School, Zhejiang Guangsha Vocational and Technical University of Construction, Dongyang 321000, China
- Correspondence: (Y.L.); (H.Y.)
| | - Yi Li
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China
- Correspondence: (Y.L.); (H.Y.)
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19
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Amar D, Gay NR, Jimenez-Morales D, Beltran PMJ, Ramaker ME, Raja AN, Zhao B, Sun Y, Marwaha S, Gaul D, Hershman SG, Xia A, Lanza I, Fernandez FM, Montgomery SB, Hevener AL, Ashley EA, Walsh MJ, Sparks LM, Burant CF, Rector RS, Thyfault J, Wheeler MT, Goodpaster BH, Coen PM, Schenk S, Bodine SC, Lindholm ME. The mitochondrial multi-omic response to exercise training across tissues. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.13.523698. [PMID: 36711881 PMCID: PMC9882193 DOI: 10.1101/2023.01.13.523698] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Mitochondria are adaptable organelles with diverse cellular functions critical to whole-body metabolic homeostasis. While chronic endurance exercise training is known to alter mitochondrial activity, these adaptations have not yet been systematically characterized. Here, the Molecular Transducers of Physical Activity Consortium (MoTrPAC) mapped the longitudinal, multi-omic changes in mitochondrial analytes across 19 tissues in male and female rats endurance trained for 1, 2, 4 or 8 weeks. Training elicited substantial changes in the adrenal gland, brown adipose, colon, heart and skeletal muscle, while we detected mild responses in the brain, lung, small intestine and testes. The colon response was characterized by non-linear dynamics that resulted in upregulation of mitochondrial function that was more prominent in females. Brown adipose and adrenal tissues were characterized by substantial downregulation of mitochondrial pathways. Training induced a previously unrecognized robust upregulation of mitochondrial protein abundance and acetylation in the liver, and a concomitant shift in lipid metabolism. The striated muscles demonstrated a highly coordinated response to increase oxidative capacity, with the majority of changes occurring in protein abundance and post-translational modifications. We identified exercise upregulated networks that are downregulated in human type 2 diabetes and liver cirrhosis. In both cases HSD17B10, a central dehydrogenase in multiple metabolic pathways and mitochondrial tRNA maturation, was the main hub. In summary, we provide a multi-omic, cross-tissue atlas of the mitochondrial response to training and identify candidates for prevention of disease-associated mitochondrial dysfunction.
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Affiliation(s)
| | | | | | | | | | | | | | - Yifei Sun
- Icahn School of Medicine at Mount Sinai, New York City, NY
| | | | | | | | - Ashley Xia
- National Institutes of Health, Bethesda, MD
| | | | | | | | | | | | - Martin J Walsh
- Icahn School of Medicine at Mount Sinai, New York City, NY
| | - Lauren M Sparks
- AdventHealth Translational Research Institute for Metabolism and Diabetes, Orlando, FL
| | | | | | - John Thyfault
- University of Kansas Medical Center, Kansas City, KS
| | | | - Bret H. Goodpaster
- AdventHealth Translational Research Institute for Metabolism and Diabetes, Orlando, FL
| | - Paul M. Coen
- AdventHealth Translational Research Institute for Metabolism and Diabetes, Orlando, FL
| | - Simon Schenk
- University of California, San Diego, La Jolla, CA
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20
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Nesterov SV, Yaguzhinsky LS, Vasilov RG, Kadantsev VN, Goltsov AN. Contribution of the Collective Excitations to the Coupled Proton and Energy Transport along Mitochondrial Cristae Membrane in Oxidative Phosphorylation System. ENTROPY (BASEL, SWITZERLAND) 2022; 24:1813. [PMID: 36554218 PMCID: PMC9778164 DOI: 10.3390/e24121813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 12/06/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
The results of many experimental and theoretical works indicate that after transport of protons across the mitochondrial inner membrane (MIM) in the oxidative phosphorylation (OXPHOS) system, they are retained on the membrane-water interface in nonequilibrium state with free energy excess due to low proton surface-to-bulk release. This well-established phenomenon suggests that proton trapping on the membrane interface ensures vectorial lateral transport of protons from proton pumps to ATP synthases (proton acceptors). Despite the key role of the proton transport in bioenergetics, the molecular mechanism of proton transfer in the OXPHOS system is not yet completely established. Here, we developed a dynamics model of long-range transport of energized protons along the MIM accompanied by collective excitation of localized waves propagating on the membrane surface. Our model is based on the new data on the macromolecular organization of the OXPHOS system showing the well-ordered structure of respirasomes and ATP synthases on the cristae membrane folds. We developed a two-component dynamics model of the proton transport considering two coupled subsystems: the ordered hydrogen bond (HB) chain of water molecules and lipid headgroups of MIM. We analytically obtained a two-component soliton solution in this model, which describes the motion of the proton kink, corresponding to successive proton hops in the HB chain, and coherent motion of a compression soliton in the chain of lipid headgroups. The local deformation in a soliton range facilitates proton jumps due to water molecules approaching each other in the HB chain. We suggested that the proton-conducting structures formed along the cristae membrane surface promote direct lateral proton transfer in the OXPHOS system. Collective excitations at the water-membrane interface in a form of two-component soliton ensure the coupled non-dissipative transport of charge carriers and elastic energy of MIM deformation to ATP synthases that may be utilized in ATP synthesis providing maximal efficiency in mitochondrial bioenergetics.
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Affiliation(s)
- Semen V. Nesterov
- Kurchatov Complex of NBICS-Technologies, National Research Center Kurchatov Institute, 123182 Moscow, Russia
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
| | - Lev S. Yaguzhinsky
- Research Center for Molecular Mechanisms of Aging and Age-Related Diseases, Moscow Institute of Physics and Technology, 141701 Dolgoprudny, Russia
- Department of Bioenergetics, Institute of Cytochemistry and Molecular Pharmacology, 115404 Moscow, Russia
- Belozersky Research Institute for Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Raif G. Vasilov
- Kurchatov Complex of NBICS-Technologies, National Research Center Kurchatov Institute, 123182 Moscow, Russia
| | - Vasiliy N. Kadantsev
- Institute for Artificial Intelligence, Russian Technological University (MIREA), 119454 Moscow, Russia
| | - Alexey N. Goltsov
- Institute for Artificial Intelligence, Russian Technological University (MIREA), 119454 Moscow, Russia
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21
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Wu Y, Chen K, Li L, Hao Z, Wang T, Liu Y, Xing G, Liu Z, Li H, Yuan H, Lu J, Zhang C, Zhang J, Zhao D, Wang J, Nie J, Ye D, Pan G, Chan WY, Liu X. Plin2-mediated lipid droplet mobilization accelerates exit from pluripotency by lipidomic remodeling and histone acetylation. Cell Death Differ 2022; 29:2316-2331. [PMID: 35614132 PMCID: PMC9613632 DOI: 10.1038/s41418-022-01018-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 05/07/2022] [Accepted: 05/08/2022] [Indexed: 12/29/2022] Open
Abstract
Metabolic switch is critical for cell fate determination through metabolic functions, epigenetic modifications, and gene expression. However, the mechanisms underlying these alterations and their functional roles remain unclear. Here, we show that Plin2-mediated moderate lipid hydrolysis is critical for pluripotency of embryonic stem cells (ESCs). Upon exit from pluripotency, lipid droplet (LD)-associated protein Plin2 is recognized by Hsc70 and degraded via chaperone-mediated autophagy to facilitate LD mobilization. Enhancing lipid hydrolysis by Plin2 knockout promotes pluripotency exit, which is recovered by ATGL inhibition. Mechanistically, excessive lipid hydrolysis induces a dramatic lipidomic remodeling characterized by decreased cardiolipin and phosphatidylethanolamine, which triggers defects in mitochondrial cristae and fatty acid oxidation, resulting in reduced acetyl-CoA and histone acetylation. Our results reveal how LD mobilization is regulated and its critical role in ESC pluripotency, and indicate the mechanism linking LD homeostasis to mitochondrial remodeling and epigenetic regulation, which might shed light on development and diseases.
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Affiliation(s)
- Yi Wu
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Keshi Chen
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Linpeng Li
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Zhihong Hao
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Tianyu Wang
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Yang Liu
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Guangsuo Xing
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Zichao Liu
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Heying Li
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Hao Yuan
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Jianghuan Lu
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | | | | | - Danyun Zhao
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Junwei Wang
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Jinfu Nie
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Dan Ye
- Fudan University, Shanghai, 200433, China
| | - Guangjin Pan
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China
| | - Wai-Yee Chan
- Key Laboratory for Regenerative Medicine, Ministry of Education, School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Xingguo Liu
- CAS Key Laboratory of Regenerative Biology, Joint School of Life Sciences, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou Medical University, Guangzhou, 510530, China.
- Bioland Laboratory (Guangzhou Regenerative Medicine and Health Guangdong Laboratory), Guangdong Provincial Key Laboratory of Stem Cell and Regenerative Medicine, China-New Zealand Joint Laboratory on Biomedicine and Health, CUHK-GIBH Joint Research Laboratory on Stem Cells and Regenerative Medicine, Institute for Stem Cell and Regeneration, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou, 510530, China.
- Centre for Regenerative Medicine and Health, Hong Kong Institute of Science & Innovation, Chinese Academy of Sciences, Hong Kong SAR, China.
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22
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Gómez-Mellado VE, Chang JC, Ho-Mok KS, Bernardino Morcillo C, Kersten RHJ, Oude Elferink RPJ, Verhoeven AJ, Paulusma CC. ATP8B1 Deficiency Results in Elevated Mitochondrial Phosphatidylethanolamine Levels and Increased Mitochondrial Oxidative Phosphorylation in Human Hepatoma Cells. Int J Mol Sci 2022; 23:ijms232012344. [PMID: 36293199 PMCID: PMC9604224 DOI: 10.3390/ijms232012344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/11/2022] [Accepted: 10/12/2022] [Indexed: 11/20/2022] Open
Abstract
ATP8B1 is a phospholipid flippase that is deficient in patients with progressive familial intrahepatic cholestasis type 1 (PFIC1). PFIC1 patients suffer from severe liver disease but also present with dyslipidemia, including low plasma cholesterol, of yet unknown etiology. Here we show that ATP8B1 knockdown in HepG2 cells leads to a strong increase in the mitochondrial oxidative phosphorylation (OXPHOS) without a change in glycolysis. The enhanced OXPHOS coincides with elevated low-density lipoprotein receptor protein and increased mitochondrial fragmentation and phosphatidylethanolamine levels. Furthermore, expression of phosphatidylethanolamine N-methyltransferase, an enzyme that catalyzes the conversion of mitochondrial-derived phosphatidylethanolamine to phosphatidylcholine, was reduced in ATP8B1 knockdown cells. We conclude that ATP8B1 deficiency results in elevated mitochondrial PE levels that stimulate mitochondrial OXPHOS. The increased OXPHOS leads to elevated LDLR levels, which provides a possible explanation for the reduced plasma cholesterol levels in PFIC1 disease.
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Affiliation(s)
- Valentina E. Gómez-Mellado
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, 1105 AZ Amsterdam, The Netherlands
| | - Jung-Chin Chang
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, 1105 AZ Amsterdam, The Netherlands
- Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, 3584 CS Utrecht, The Netherlands
| | - Kam S. Ho-Mok
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, 1105 AZ Amsterdam, The Netherlands
| | - Carmen Bernardino Morcillo
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
| | - Remco H. J. Kersten
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, 1105 AZ Amsterdam, The Netherlands
| | - Ronald P. J. Oude Elferink
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, 1105 AZ Amsterdam, The Netherlands
| | - Arthur J. Verhoeven
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, 1105 AZ Amsterdam, The Netherlands
| | - Coen C. Paulusma
- Amsterdam UMC, University of Amsterdam, Tytgat Institute for Liver and Intestinal Research, Meibergdreef 69, 1105 BK Amsterdam, The Netherlands
- Amsterdam Gastroenterology Endocrinology Metabolism, 1105 AZ Amsterdam, The Netherlands
- Correspondence:
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23
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Yamamoto H, Eshima H, Kakehi S, Kawamori R, Watada H, Tamura Y. Impaired fatigue resistance, sarcoplasmic reticulum function, and mitochondrial activity in soleus muscle of db/db mice. Physiol Rep 2022; 10:e15478. [PMID: 36117307 PMCID: PMC9483406 DOI: 10.14814/phy2.15478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 08/26/2022] [Accepted: 09/05/2022] [Indexed: 11/24/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) is characterized by reduced exercise tolerance due to increased fatigability in skeletal muscle. In this study, we investigated muscle fatigue resistance of soleus (SOL) muscle in obese type 2 diabetic model mice (db/db). No differences in muscle volume, absolute force, or specific force in SOL muscle were observed between db/db mice and control mice (db/+), while fatigue resistance evaluated by repeated tetanic contractions was significantly lower in db/db mice (30th tetani, db/+: 63.7 ± 4.7%, db/db: 51.3 ± 4.8%). The protein abundance related to Ca2+ release from the sarcoplasmic reticulum (SR) in SOL muscle was not different between db/db mice and db/+ mice, while SR Ca2+ -ATPase (Ca2+ reuptake to SR) protein was decreased in db/db mice compared to db/+ mice (db/+: 1.00 ± 0.17, db/db: 0.60 ± 0.04, relative units). In addition, mitochondrial oxidative enzyme activity (succinate dehydrogenase) was decreased in the SOL muscle of db/db mice (p < 0.05). These data suggest that fatigue resistance in slow-twitch dominant muscle is impaired in mice with T2DM. Decreased mitochondrial oxidative enzyme activity and impairment of Ca2+ uptake to SR, or both might be involved in the mechanisms.
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Affiliation(s)
- Hiro Yamamoto
- Department of International TourismNagasaki International UniversityNagasakiJapan
| | - Hiroaki Eshima
- Department of International TourismNagasaki International UniversityNagasakiJapan
- Department of Metabolism & EndocrinologyJuntendo University Graduate School of MedicineTokyoJapan
- Sportology CenterJuntendo University Graduate School of MedicineTokyoJapan
| | - Saori Kakehi
- Department of Metabolism & EndocrinologyJuntendo University Graduate School of MedicineTokyoJapan
- Sportology CenterJuntendo University Graduate School of MedicineTokyoJapan
| | - Ryuzo Kawamori
- Department of Metabolism & EndocrinologyJuntendo University Graduate School of MedicineTokyoJapan
- Sportology CenterJuntendo University Graduate School of MedicineTokyoJapan
| | - Hirotaka Watada
- Department of Metabolism & EndocrinologyJuntendo University Graduate School of MedicineTokyoJapan
- Sportology CenterJuntendo University Graduate School of MedicineTokyoJapan
- Center for Therapeutic Innovations in DiabetesJuntendo University Graduate School of MedicineTokyoJapan
- Center for Identification of Diabetic Therapeutic TargetsJuntendo University Graduate School of MedicineTokyoJapan
| | - Yoshifumi Tamura
- Department of Metabolism & EndocrinologyJuntendo University Graduate School of MedicineTokyoJapan
- Sportology CenterJuntendo University Graduate School of MedicineTokyoJapan
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24
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GOLM1 depletion modifies cellular sphingolipid metabolism and adversely affects cell growth. J Lipid Res 2022; 63:100259. [PMID: 35948172 PMCID: PMC9475319 DOI: 10.1016/j.jlr.2022.100259] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/11/2022] [Accepted: 07/12/2022] [Indexed: 11/30/2022] Open
Abstract
Golgi membrane protein 1 (GOLM1) is a Golgi-resident type 2 transmembrane protein known to be overexpressed in several cancers, including hepatocellular carcinoma (HCC), as well as in viral infections. However, the role of GOLM1 in lipid metabolism remains enigmatic. In this study, we employed siRNA-mediated GOLM1 depletion in Huh-7 HCC cells to study the role of GOLM1 in lipid metabolism. Mass spectrometric lipidomic analysis in GOLM1 knockdown cells showed an aberrant accumulation of sphingolipids, such as ceramides, hexosylceramides, dihexosylceramides, sphinganine, sphingosine, and ceramide phosphate, along with cholesteryl esters. Furthermore, we observed a reduction in phosphatidylethanolamines and lysophosphatidylethanolamines. In addition, Seahorse extracellular flux analysis indicated a reduction in mitochondrial oxygen consumption rate upon GOLM1 depletion. Finally, alterations in Golgi structure and distribution were observed both by electron microscopy imaging and immunofluorescence microscopy analysis. Importantly, we found that GOLM1 depletion also affected cell proliferation and cell cycle progression in Huh-7 HCC cells. The Golgi structural defects induced by GOLM1 reduction might potentially affect the trafficking of proteins and lipids leading to distorted intracellular lipid homeostasis, which may result in organelle dysfunction and altered cell growth. In conclusion, we demonstrate that GOLM1 depletion affects sphingolipid metabolism, mitochondrial function, Golgi structure, and proliferation of HCC cells.
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25
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Tang Y, Zong H, Kwon H, Qiu Y, Pessin JB, Wu L, Buddo KA, Boykov I, Schmidt CA, Lin CT, Neufer PD, Schwartz GJ, Kurland IJ, Pessin J. TIGAR deficiency enhances skeletal muscle thermogenesis by increasing neuromuscular junction cholinergic signaling. eLife 2022; 11:73360. [PMID: 35254259 PMCID: PMC8947760 DOI: 10.7554/elife.73360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 03/02/2022] [Indexed: 12/03/2022] Open
Abstract
Cholinergic and sympathetic counter-regulatory networks control numerous physiological functions, including learning/memory/cognition, stress responsiveness, blood pressure, heart rate, and energy balance. As neurons primarily utilize glucose as their primary metabolic energy source, we generated mice with increased glycolysis in cholinergic neurons by specific deletion of the fructose-2,6-phosphatase protein TIGAR. Steady-state and stable isotope flux analyses demonstrated increased rates of glycolysis, acetyl-CoA production, acetylcholine levels, and density of neuromuscular synaptic junction clusters with enhanced acetylcholine release. The increase in cholinergic signaling reduced blood pressure and heart rate with a remarkable resistance to cold-induced hypothermia. These data directly demonstrate that increased cholinergic signaling through the modulation of glycolysis has several metabolic benefits particularly to increase energy expenditure and heat production upon cold exposure.
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Affiliation(s)
- Yan Tang
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Haihong Zong
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Hyokjoon Kwon
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Yunping Qiu
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Jacob B Pessin
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Licheng Wu
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Katherine A Buddo
- Department of Physiology, East Carolina University, Greenville, United States
| | - Ilya Boykov
- Department of Physiology, East Carolina University, Greenville, United States
| | - Cameron A Schmidt
- Department of Physiology, East Carolina University, Greenville, United States
| | - Chien-Te Lin
- Department of Physiology, East Carolina University, Greenville, United States
| | - P Darrell Neufer
- Department of Physiology, East Carolina University, Greenville, United States
| | - Gary J Schwartz
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Irwin J Kurland
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
| | - Jeffrey Pessin
- Department of Medicine, Albert Einstein College of Medicine, Bronx, United States
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26
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Huang Q, Wu X, Gu Y, Wang T, Zhan Y, Chen J, Zeng Z, Lv Y, Zhao J, Xie J. Detection of the Disorders of Glycerophospholipids and Amino Acids Metabolism in Lung Tissue From Male COPD Patients. Front Mol Biosci 2022; 9:839259. [PMID: 35309511 PMCID: PMC8927538 DOI: 10.3389/fmolb.2022.839259] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 01/19/2022] [Indexed: 11/22/2022] Open
Abstract
Background: At present, few studies have reported the metabolic profiles of lung tissue in patients with COPD. Our study attempted to analyze the lung metabolome in male COPD patients and to screen the overlapping biomarkers of the lung and plasma metabolomes. Methods: We performed untargeted metabolomic analysis of normal lung tissue from two independent sets (the discovery set: 20 male COPD patients and 20 controls and the replication set: 47 male COPD patients and 27 controls) and of plasma samples from 80 male subjects containing 40 COPD patients and 40 controls. Results: We found glycerophospholipids (GPs) and Amino acids were the primary classes of differential metabolites between male COPD patients and controls. The disorders of GPs metabolism and the valine, leucine and isoleucine biosynthesis metabolism pathways were identified in lung discovery set and then also validated in the lung replication set. Combining lung tissue and plasma metabolome, Phytosphingosine and l-tryptophan were two overlapping metabolites biomarkers. Binary logistic regression suggested that phytosphingosine together with l-tryptophan was closely associated with male COPD and showed strong diagnostic power with an AUC of 0.911 (95% CI: 0.8460-0.9765). Conclusion: Our study revealed the metabolic perturbations of lung tissues from male COPD patients. The detected disorders of GPs and amino acids may provide an insight into the pathological mechanism of COPD. Phytosphingosine and l-tryptophan were two novel metabolic biomarkers for differentiating COPD patients and controls.
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Affiliation(s)
- Qian Huang
- Department of Respiratory and Critical Care Medicine, National Clinical Research Center of Respiratory Disease, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiaojie Wu
- Department of Respiratory and Critical Care Medicine, Wuhan Hospital of Traditional Chinese and Western Medicine, Wuhan, China
| | - Yiya Gu
- Department of Respiratory and Critical Care Medicine, National Clinical Research Center of Respiratory Disease, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ting Wang
- Department of Respiratory and Critical Care Medicine, National Clinical Research Center of Respiratory Disease, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuan Zhan
- Department of Respiratory and Critical Care Medicine, National Clinical Research Center of Respiratory Disease, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jinkun Chen
- Department of Science, Western University, London, ON, Canada
| | - Zhilin Zeng
- Department and Institute of Infectious Disease, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yongman Lv
- Health Management Center, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianping Zhao
- Department of Respiratory and Critical Care Medicine, National Clinical Research Center of Respiratory Disease, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jungang Xie
- Department of Respiratory and Critical Care Medicine, National Clinical Research Center of Respiratory Disease, Key Laboratory of Pulmonary Diseases of Health Ministry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Jungang Xie,
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27
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Vike NL, Bari S, Stetsiv K, Talavage TM, Nauman EA, Papa L, Slobounov S, Breiter HC, Cornelis MC. Metabolomic response to collegiate football participation: Pre- and Post-season analysis. Sci Rep 2022; 12:3091. [PMID: 35197541 PMCID: PMC8866500 DOI: 10.1038/s41598-022-07079-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Accepted: 02/03/2022] [Indexed: 11/09/2022] Open
Abstract
Contact sports participation has been shown to have both beneficial and detrimental effects on health, however little is known about the metabolic sequelae of these effects. We aimed to identify metabolite alterations across a collegiate American football season. Serum was collected from 23 male collegiate football athletes before the athletic season (Pre) and after the last game (Post). Samples underwent nontargeted metabolomic profiling and 1131 metabolites were included for univariate, pathway enrichment, and multivariate analyses. Significant metabolites were assessed against head acceleration events (HAEs). 200 metabolites changed from Pre to Post (P < 0.05 and Q < 0.05); 160 had known identity and mapped to one of 57 pre-defined biological pathways. There was significant enrichment of metabolites belonging to five pathways (P < 0.05): xanthine, fatty acid (acyl choline), medium chain fatty acid, primary bile acid, and glycolysis, gluconeogenesis, and pyruvate metabolism. A set of 12 metabolites was sufficient to discriminate Pre from Post status, and changes in 64 of the 200 metabolites were also associated with HAEs (P < 0.05). In summary, the identified metabolites, and candidate pathways, argue there are metabolic consequences of both physical training and head impacts with football participation. These findings additionally identify a potential set of objective biomarkers of repetitive head injury.
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Affiliation(s)
- Nicole L Vike
- Warren Wright Adolescent Center Department of Psychiatry and Behavioral Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Sumra Bari
- Warren Wright Adolescent Center Department of Psychiatry and Behavioral Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Khrystyna Stetsiv
- Warren Wright Adolescent Center Department of Psychiatry and Behavioral Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Thomas M Talavage
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA
| | - Eric A Nauman
- Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN, USA
| | - Linda Papa
- Department of Emergency Medicine, Orlando Regional Medical Center, Orlando, FL, USA
| | - Semyon Slobounov
- Department of Kinesiology, Pennsylvania State University, University Park, PA, USA.
| | - Hans C Breiter
- Warren Wright Adolescent Center Department of Psychiatry and Behavioral Sciences, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
- Laboratory of Neuroimaging and Genetics, Department of Psychiatry, Massachusetts General Hospital and Harvard School of Medicine, Boston, MA, USA
| | - Marilyn C Cornelis
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
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28
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Salamone IM, Quattrocelli M, Barefield DY, Page PG, Tahtah I, Hadhazy M, Tomar G, McNally EM. Intermittent glucocorticoid treatment enhances skeletal muscle performance through sexually dimorphic mechanisms. J Clin Invest 2022; 132:149828. [PMID: 35143417 PMCID: PMC8920338 DOI: 10.1172/jci149828] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Accepted: 02/02/2022] [Indexed: 11/17/2022] Open
Abstract
Glucocorticoid steroids are commonly prescribed for many inflammatory conditions, but chronic daily use produces adverse effects, including muscle wasting and weakness. In contrast, shorter glucocorticoid pulses may improve athletic performance, although the mechanisms remain unclear. Muscle is sexually dimorphic and comparatively little is known about how male and female muscles respond to glucocorticoids. We investigated the impact of once-weekly glucocorticoid exposure on skeletal muscle performance comparing male and female mice. One month of once-weekly glucocorticoid dosing improved muscle specific force in both males and females. Transcriptomic profiling of isolated myofibers identified a striking sexually dimorphic response to weekly glucocorticoids. Male myofibers had increased expression of genes in the IGF1/PI3K pathway and calcium handling, while female myofibers had profound upregulation of lipid metabolism genes. Muscles from weekly prednisone–treated males had improved calcium handling, while comparably treated female muscles had reduced intramuscular triglycerides. Consistent with altered lipid metabolism, weekly prednisone–treated female mice had greater endurance relative to controls. Using chromatin immunoprecipitation, we defined a sexually dimorphic chromatin landscape after weekly prednisone. These results demonstrate that weekly glucocorticoid exposure elicits distinct pathways in males versus females, resulting in enhanced performance.
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Affiliation(s)
- Isabella M Salamone
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, United States of America
| | - Mattia Quattrocelli
- Department of Pediatrics, Cinicinnati Children's Hospital, Cincinnati, United States of America
| | - David Y Barefield
- Cell and Molecular Physiology, Loyola University Stritch School of Medicine, Maywood, United States of America
| | - Patrick G Page
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, United States of America
| | - Ibrahim Tahtah
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, United States of America
| | - Michele Hadhazy
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, United States of America
| | - Garima Tomar
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, United States of America
| | - Elizabeth M McNally
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, United States of America
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29
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Valentine WJ, Mostafa SA, Tokuoka SM, Hamano F, Inagaki NF, Nordin JZ, Motohashi N, Kita Y, Aoki Y, Shimizu T, Shindou H. Lipidomic Analyses Reveal Specific Alterations of Phosphatidylcholine in Dystrophic Mdx Muscle. Front Physiol 2022; 12:698166. [PMID: 35095541 PMCID: PMC8791236 DOI: 10.3389/fphys.2021.698166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 12/06/2021] [Indexed: 11/13/2022] Open
Abstract
In Duchenne muscular dystrophy (DMD), lack of dystrophin increases the permeability of myofiber plasma membranes to ions and larger macromolecules, disrupting calcium signaling and leading to progressive muscle wasting. Although the biological origin and meaning are unclear, alterations of phosphatidylcholine (PC) are reported in affected skeletal muscles of patients with DMD that may include higher levels of fatty acid (FA) 18:1 chains and lower levels of FA 18:2 chains, possibly reflected in relatively high levels of PC 34:1 (with 16:0_18:1 chain sets) and low levels of PC 34:2 (with 16:0_18:2 chain sets). Similar PC alterations have been reported to occur in the mdx mouse model of DMD. However, altered ratios of PC 34:1 to PC 34:2 have been variably reported, and we also observed that PC 34:2 levels were nearly equally elevated as PC 34:1 in the affected mdx muscles. We hypothesized that experimental factors that often varied between studies; including muscle types sampled, mouse ages, and mouse diets; may strongly impact the PC alterations detected in dystrophic muscle of mdx mice, especially the PC 34:1 to PC 34:2 ratios. In order to test our hypothesis, we performed comprehensive lipidomic analyses of PC and phosphatidylethanolamine (PE) in several muscles (extensor digitorum longus, gastrocnemius, and soleus) and determined the mdx-specific alterations. The alterations in PC 34:1 and PC 34:2 were closely monitored from the neonate period to the adult, and also in mice raised on several diets that varied in their fats. PC 34:1 was naturally high in neonate’s muscle and decreased until age ∼3-weeks (disease onset age), and thereafter remained low in WT muscles but was higher in regenerated mdx muscles. Among the muscle types, soleus showed a distinctive phospholipid pattern with early and diminished mdx alterations. Diet was a major factor to impact PC 34:1/PC 34:2 ratios because mdx-specific alterations of PC 34:2 but not PC 34:1 were strictly dependent on diet. Our study identifies high PC 34:1 as a consistent biochemical feature of regenerated mdx-muscle and indicates nutritional approaches are also effective to modify the phospholipid compositions.
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Affiliation(s)
- William J. Valentine
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- *Correspondence: William J. Valentine,
| | - Sherif A. Mostafa
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- Weill Cornell Medicine—Qatar, Doha, Qatar
| | - Suzumi M. Tokuoka
- Department of Lipidomics, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
| | - Fumie Hamano
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
| | - Natsuko F. Inagaki
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
| | - Joel Z. Nordin
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
- Department of Laboratory Medicine, Centre for Biomolecular and Cellular Medicine, Karolinska Institutet, Huddinge, Sweden
| | - Norio Motohashi
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
| | - Yoshihiro Kita
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
| | - Yoshitsugu Aoki
- Department of Molecular Therapy, National Center for Neurology and Psychiatry (NCNP), National Institute of Neuroscience, Kodaira, Tokyo, Japan
- Yoshitsugu Aoki,
| | - Takao Shimizu
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
| | - Hideo Shindou
- Department of Lipid Signaling, National Center for Global Health and Medicine (NCGM), Shinjuku-ku, Japan
- Department of Medical Lipid Science, Graduate School of Medicine, The University of Tokyo, Bunkyo-ku, Japan
- Hideo Shindou,
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30
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Zhang S, Hu L, Han C, Huang R, Ooi K, Qian X, Ren X, Chu D, Zhang H, Du D, Xia C. PLIN2 Mediates Neuroinflammation and Oxidative/Nitrosative Stress via Downregulating Phosphatidylethanolamine in the Rostral Ventrolateral Medulla of Stressed Hypertensive Rats. J Inflamm Res 2021; 14:6331-6348. [PMID: 34880641 PMCID: PMC8646230 DOI: 10.2147/jir.s329230] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Accepted: 09/03/2021] [Indexed: 12/22/2022] Open
Abstract
Purpose Oxidative/nitrosative stress, neuroinflammation and their intimate interactions mediate sympathetic overactivation in hypertension. An immoderate inflammatory response is characterized not only by elevated proinflammatory cytokines (PICs) but by increases in mitochondrial dysfunction, reactive oxygen species (ROS), and nitric oxide (NO). Recent data pinpoint that both the phospholipid and lipid droplets (LDs) are potent modulators of microglia physiology. Methods Stress rats underwent compound stressors for 15 days with PLIN2-siRNA or scrambled-siRNA (SC-siRNA) administrated into the rostral ventrolateral medulla (RVLM). Lipids were analyzed by mass spectroscopy-based quantitative lipidomics. The phenotypes and proliferation of microglia, LDs, in the RVLM of rats were detected; blood pressure (BP) and myocardial injury in rats were evaluated. The anti-oxidative/nitrosative stress effect of phosphatidylethanolamine (PE) was explored in cultured primary microglia. Results Lipidomics analysis showed that 75 individual lipids in RVLM were significantly dysregulated by stress [PE was the most one], demonstrating that lipid composition changed with stress. In vitro, prorenin stress induced the accumulation of LDs, increased PICs, which could be blocked by siRNA-PLIN2 in microglia. PLIN2 knockdown upregulated the PE synthesis in microglia. Anti-oxidative/nitrosative stress effect of PE delivery was confirmed by the decrease of ROS and decrease in 3-NT and MDA in prorenin-treated microglia. PLIN2 knockdown in the RVLM blocked the number of iNOS+ and PCNA+ microglia, decreased BP, alleviated cardiac fibrosis and hypertrophy in stressed rats. Conclusion PLIN2 mediates microglial polarization/proliferation via downregulating PE in the RVLM of stressed rats. Delivery of PE is a promising strategy for combating neuroinflammation and oxidative/nitrosative stress in stress-induced hypertension.
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Affiliation(s)
- Shutian Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Li Hu
- Department of Cardiology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, 200240, People's Republic of China
| | - Chengzhi Han
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Renhui Huang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Kokwin Ooi
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Xinyi Qian
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Xiaorong Ren
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
| | - Dechang Chu
- College of Agriculture and Bioengineering, Heze University, Heze, 274000, People's Republic of China
| | - Haili Zhang
- College of Agriculture and Bioengineering, Heze University, Heze, 274000, People's Republic of China
| | - Dongshu Du
- School of Life Science, Shanghai University, Shanghai, 200444, People's Republic of China
| | - Chunmei Xia
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Fudan University, Shanghai, 200032, People's Republic of China
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31
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Renne MF, Bao X, Hokken MW, Bierhuizen AS, Hermansson M, Sprenger RR, Ewing TA, Ma X, Cox RC, Brouwers JF, De Smet CH, Ejsing CS, de Kroon AI. Molecular species selectivity of lipid transport creates a mitochondrial sink for di-unsaturated phospholipids. EMBO J 2021; 41:e106837. [PMID: 34873731 PMCID: PMC8762554 DOI: 10.15252/embj.2020106837] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/22/2021] [Accepted: 10/26/2021] [Indexed: 11/09/2022] Open
Abstract
Mitochondria depend on the import of phospholipid precursors for the biosynthesis of phosphatidylethanolamine (PE) and cardiolipin, yet the mechanism of their transport remains elusive. A dynamic lipidomics approach revealed that mitochondria preferentially import di-unsaturated phosphatidylserine (PS) for subsequent conversion to PE by the mitochondrial PS decarboxylase Psd1p. Several protein complexes tethering mitochondria to the endomembrane system have been implicated in lipid transport in yeast, including the endoplasmic reticulum (ER)-mitochondrial encounter structure (ERMES), ER-membrane complex (EMC), and the vacuole and mitochondria patch (vCLAMP). By limiting the availability of unsaturated phospholipids, we created conditions to investigate the mechanism of lipid transfer and the contributions of the tethering complexes in vivo. Under these conditions, inactivation of ERMES components or of the vCLAMP component Vps39p exacerbated accumulation of saturated lipid acyl chains, indicating that ERMES and Vps39p contribute to the mitochondrial sink for unsaturated acyl chains by mediating transfer of di-unsaturated phospholipids. These results support the concept that intermembrane lipid flow is rate-limited by molecular species-dependent lipid efflux from the donor membrane and driven by the lipid species' concentration gradient between donor and acceptor membrane.
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Affiliation(s)
- Mike F Renne
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Xue Bao
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Margriet Wj Hokken
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Adolf S Bierhuizen
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Martin Hermansson
- Department of Biochemistry and Molecular Biology, VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, Odense, Denmark
| | - Richard R Sprenger
- Department of Biochemistry and Molecular Biology, VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, Odense, Denmark
| | - Tom A Ewing
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Xiao Ma
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Ruud C Cox
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Jos F Brouwers
- Biochemistry and Cell Biology, Department of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Cedric H De Smet
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
| | - Christer S Ejsing
- Department of Biochemistry and Molecular Biology, VILLUM Center for Bioanalytical Sciences, University of Southern Denmark, Odense, Denmark.,Cell Biology and Biophysics Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Anton Ipm de Kroon
- Membrane Biochemistry & Biophysics, Department of Chemistry, Utrecht University, Utrecht, The Netherlands
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32
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Prola A, Vandestienne A, Baroudi N, Joubert F, Tiret L, Pilot-Storck F. Isolation and Phospholipid Enrichment of Muscle Mitochondria and Mitoplasts. Bio Protoc 2021; 11:e4201. [PMID: 34761073 PMCID: PMC8554811 DOI: 10.21769/bioprotoc.4201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/28/2021] [Accepted: 08/06/2021] [Indexed: 11/02/2022] Open
Abstract
The efficient ATP production in mitochondria relies on the highly specific organization of its double membrane. Notably, the inner mitochondrial membrane (IMM) displays a massive surface extension through its folding into cristae, along which concentrate respiratory complexes and oligomers of the ATP synthase. Evidence has accumulated to highlight the importance of a specific phospholipid composition of the IMM to support mitochondrial oxidative phosphorylation. Contribution of specific phospholipids to mitochondrial ATP production is classically studied by modulating the activity of enzymes involved in their synthesis, but the interconnection of phospholipid synthesis pathways often impedes the determination of the precise role of each phospholipid. Here, we describe a protocol to specifically enrich mitochondrial membranes with cardiolipin or phosphatidylcholine, as well as a fluorescence-based method to quantify phospholipid enrichment. This method, based on the fusion of lipid vesicles with isolated mitochondria, may further allow a precise evaluation of phospholipid contribution to mitochondrial functions.
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Affiliation(s)
- Alexandre Prola
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France
- École nationale vétérinaire d’Alfort, IMRB, F-94700 Maisons-Alfort, France
- EFS, IMRB, F-94010 Créteil, France
| | - Aymeline Vandestienne
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France
- École nationale vétérinaire d’Alfort, IMRB, F-94700 Maisons-Alfort, France
- EFS, IMRB, F-94010 Créteil, France
| | - Nabil Baroudi
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France
- École nationale vétérinaire d’Alfort, IMRB, F-94700 Maisons-Alfort, France
- EFS, IMRB, F-94010 Créteil, France
- Laboratoire Jean Perrin, CNRS, Sorbonne Université, UMR 8237, F-75005 Paris, France
| | - Frederic Joubert
- Laboratoire Jean Perrin, CNRS, Sorbonne Université, UMR 8237, F-75005 Paris, France
| | - Laurent Tiret
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France
- École nationale vétérinaire d’Alfort, IMRB, F-94700 Maisons-Alfort, France
- EFS, IMRB, F-94010 Créteil, France
| | - Fanny Pilot-Storck
- Univ Paris-Est Créteil, INSERM, IMRB, Team Relaix, F-94010 Créteil, France
- École nationale vétérinaire d’Alfort, IMRB, F-94700 Maisons-Alfort, France
- EFS, IMRB, F-94010 Créteil, France
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33
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Zhuang A, Yang C, Liu Y, Tan Y, Bond ST, Walker S, Sikora T, Laskowski A, Sharma A, de Haan JB, Meikle PJ, Shimizu T, Coughlan MT, Calkin AC, Drew BG. SOD2 in skeletal muscle: New insights from an inducible deletion model. Redox Biol 2021; 47:102135. [PMID: 34598016 PMCID: PMC8487078 DOI: 10.1016/j.redox.2021.102135] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 01/01/2023] Open
Abstract
Metabolic conditions such as obesity, insulin resistance and glucose intolerance are frequently associated with impairments in skeletal muscle function and metabolism. This is often linked to dysregulation of homeostatic pathways including an increase in reactive oxygen species (ROS) and oxidative stress. One of the main sites of ROS production is the mitochondria, where the flux of substrates through the electron transport chain (ETC) can result in the generation of oxygen free radicals. Fortunately, several mechanisms exist to buffer bursts of intracellular ROS and peroxide production, including the enzymes Catalase, Glutathione Peroxidase and Superoxide Dismutase (SOD). Of the latter, there are two intracellular isoforms; SOD1 which is mostly cytoplasmic, and SOD2 which is found exclusively in the mitochondria. Developmental and chronic loss of these enzymes has been linked to disease in several studies, however the temporal effects of these disturbances remain largely unexplored. Here, we induced a post-developmental (8-week old mice) deletion of SOD2 in skeletal muscle (SOD2-iMKO) and demonstrate that 16 weeks of SOD2 deletion leads to no major impairment in whole body metabolism, despite these mice displaying alterations in aspects of mitochondrial abundance and voluntary ambulatory movement. This is likely partly explained by the suggestive data that a compensatory response may exist from other redox enzymes, including catalase and glutathione peroxidases. Nevertheless, we demonstrated that inducible SOD2 deletion impacts on specific aspects of muscle lipid metabolism, including the abundance of phospholipids and phosphatidic acid (PA), the latter being a key intermediate in several cellular signaling pathways. Thus, our findings suggest that post-developmental deletion of SOD2 induces a more subtle phenotype than previous embryonic models have shown, allowing us to highlight a previously unrecognized link between SOD2, mitochondrial function and bioactive lipid species including PA.
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Affiliation(s)
- Aowen Zhuang
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia; Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia
| | - Christine Yang
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia
| | - Yingying Liu
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia
| | - Yanie Tan
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia
| | - Simon T Bond
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia; Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia
| | - Shannen Walker
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia
| | - Tim Sikora
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia
| | - Adrienne Laskowski
- Department of Diabetes, Central Clinical School, Monash University, Melbourne, 3004, Australia
| | - Arpeeta Sharma
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia
| | - Judy B de Haan
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia; Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia; Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, 3083, Australia; Faculty of Science, Engineering and Technology, Swinburne University, Melbourne, 3122, Australia
| | - Peter J Meikle
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia; Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia
| | - Takahiko Shimizu
- Aging Stress Response Research Project Team, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
| | - Melinda T Coughlan
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Department of Diabetes, Central Clinical School, Monash University, Melbourne, 3004, Australia
| | - Anna C Calkin
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia; Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia
| | - Brian G Drew
- Baker Heart & Diabetes Institute, Melbourne, 3004, Australia; Central Clinical School, Monash University, Melbourne, 3004, Australia; Baker Department of Cardiometabolic Health, University of Melbourne, Melbourne, Australia.
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34
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Ferrara PJ, Verkerke ARP, Maschek JA, Shahtout JL, Siripoksup P, Eshima H, Johnson JM, Petrocelli JJ, Mahmassani ZS, Green TD, McClung JM, Cox JE, Drummond MJ, Funai K. Low lysophosphatidylcholine induces skeletal muscle myopathy that is aggravated by high-fat diet feeding. FASEB J 2021; 35:e21867. [PMID: 34499764 DOI: 10.1096/fj.202101104r] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 07/27/2021] [Accepted: 08/09/2021] [Indexed: 12/25/2022]
Abstract
Obesity alters skeletal muscle lipidome and promotes myopathy, but it is unknown whether aberrant muscle lipidome contributes to the reduction in skeletal muscle contractile force-generating capacity. Comprehensive lipidomic analyses of mouse skeletal muscle revealed a very strong positive correlation between the abundance of lysophosphatidylcholine (lyso-PC), a class of lipids that is known to be downregulated with obesity, with maximal tetanic force production. The level of lyso-PC is regulated primarily by lyso-PC acyltransferase 3 (LPCAT3), which acylates lyso-PC to form phosphatidylcholine. Tamoxifen-inducible skeletal muscle-specific overexpression of LPCAT3 (LPCAT3-MKI) was sufficient to reduce muscle lyso-PC content in both standard chow diet- and high-fat diet (HFD)-fed conditions. Strikingly, the assessment of skeletal muscle force-generating capacity ex vivo revealed that muscles from LPCAT3-MKI mice were weaker regardless of diet. Defects in force production were more apparent in HFD-fed condition, where tetanic force production was 40% lower in muscles from LPCAT3-MKI compared to that of control mice. These observations were partly explained by reductions in the cross-sectional area in type IIa and IIx fibers, and signs of muscle edema in the absence of fibrosis. Future studies will pursue the mechanism by which LPCAT3 may alter protein turnover to promote myopathy.
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Affiliation(s)
- Patrick J Ferrara
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Anthony R P Verkerke
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - J Alan Maschek
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Metabolomics, Mass Spectrometry, and Proteomics Core, University of Utah, Salt Lake City, Utah, USA
| | - Justin L Shahtout
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Piyarat Siripoksup
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Hiroaki Eshima
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of International Tourism, Nagasaki International University, Sasebo, Japan
| | - Jordan M Johnson
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - Jonathan J Petrocelli
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Ziad S Mahmassani
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Thomas D Green
- East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - Joseph M McClung
- East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA
| | - James E Cox
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Metabolomics, Mass Spectrometry, and Proteomics Core, University of Utah, Salt Lake City, Utah, USA.,Department of Biochemistry, University of Utah, Salt Lake City, Utah, USA
| | - Micah J Drummond
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Katsuhiko Funai
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah, USA.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, North Carolina, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
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35
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Dabravolski SA, Bezsonov EE, Orekhov AN. The role of mitochondria dysfunction and hepatic senescence in NAFLD development and progression. Biomed Pharmacother 2021; 142:112041. [PMID: 34411916 DOI: 10.1016/j.biopha.2021.112041] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 07/29/2021] [Accepted: 08/09/2021] [Indexed: 02/07/2023] Open
Abstract
Senescence is a crucial player in several metabolic disorders and chronic inflammatory diseases. Recent data prove the involvement of hepatocyte senescence in the development of NAFLD (non-alcoholic fatty liver disease). As the main energy and ROS (reactive oxygen species) producing organelle, mitochondria play the central role in accelerated senescence and diseases development. In this review, we focus on the role of regulation of mitochondrial Ca2+ homeostasis, NAD+/NADH ratio, UPRmt (mitochondrial unfolded protein response), phospholipids and fatty acid oxidation in hepatic senescence, lifespan and NAFLD disease susceptibility. Additionally, the involvement of mitochondrial and nuclear mutations in lifespan-modulation and NAFLD development is discussed. While nuclear and mitochondria DNA mutations and SNPs (single nucleotide polymorphisms) can be used as effective diagnostic markers and targets for treatments, advanced age should be considered as an independent risk factor for NAFLD development.
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Affiliation(s)
- Siarhei A Dabravolski
- Department of Clinical Diagnostics, Vitebsk State Academy of Veterinary Medicine [UO VGAVM], 7/11 Dovatora str., 210026 Vitebsk, Belarus.
| | - Evgeny E Bezsonov
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, Institute of Human Morphology, 3 Tsyurupa Street, 117418 Moscow, Russia; Laboratory of Angiopathology, The Institute of General Pathology and Pathophysiology, 8 Baltiyskaya Street, 125315 Moscow, Russia.
| | - Alexander N Orekhov
- Laboratory of Cellular and Molecular Pathology of Cardiovascular System, Institute of Human Morphology, 3 Tsyurupa Street, 117418 Moscow, Russia; Laboratory of Angiopathology, The Institute of General Pathology and Pathophysiology, 8 Baltiyskaya Street, 125315 Moscow, Russia; Department of Basic Research, Institute for Atherosclerosis Research, Moscow 121609, Russia.
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36
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Adaptive optimization of the OXPHOS assembly line partially compensates lrpprc-dependent mitochondrial translation defects in mice. Commun Biol 2021; 4:989. [PMID: 34413467 PMCID: PMC8376967 DOI: 10.1038/s42003-021-02492-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 07/20/2021] [Indexed: 11/20/2022] Open
Abstract
Mouse models of genetic mitochondrial disorders are generally used to understand specific molecular defects and their biochemical consequences, but rarely to map compensatory changes allowing survival. Here we took advantage of the extraordinary mitochondrial resilience of hepatic Lrpprc knockout mice to explore this question using native proteomics profiling and lipidomics. In these mice, low levels of the mtRNA binding protein LRPPRC induce a global mitochondrial translation defect and a severe reduction (>80%) in the assembly and activity of the electron transport chain (ETC) complex IV (CIV). Yet, animals show no signs of overt liver failure and capacity of the ETC is preserved. Beyond stimulation of mitochondrial biogenesis, results show that the abundance of mitoribosomes per unit of mitochondria is increased and proteostatic mechanisms are induced in presence of low LRPPRC levels to preserve a balance in the availability of mitochondrial- vs nuclear-encoded ETC subunits. At the level of individual organelles, a stabilization of residual CIV in supercomplexes (SCs) is observed, pointing to a role of these supramolecular arrangements in preserving ETC function. While the SC assembly factor COX7A2L could not contribute to the stabilization of CIV, important changes in membrane glycerophospholipid (GPL), most notably an increase in SC-stabilizing cardiolipins species (CLs), were observed along with an increased abundance of other supramolecular assemblies known to be stabilized by, and/or participate in CL metabolism. Together these data reveal a complex in vivo network of molecular adjustments involved in preserving mitochondrial integrity in energy consuming organs facing OXPHOS defects, which could be therapeutically exploited. Cuillerier et al. investigate compensatory mechanisms underlying survival of mice with a liver-specific knockout of the mitochondrial mRNA-binding protein Lrpprc. They propose various mechanisms operating along the OXPHOS assembly line, including mitochondrial biogenesis, mitochondrial ribosome upregulation and preferential supercomplex assembly, that could compensate lack of LRPPRC and allow survival of these mice.
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37
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Mendham AE, Goedecke JH, Zeng Y, Larsen S, George C, Hauksson J, Fortuin-de Smidt MC, Chibalin AV, Olsson T, Chorell E. Exercise training improves mitochondrial respiration and is associated with an altered intramuscular phospholipid signature in women with obesity. Diabetologia 2021; 64:1642-1659. [PMID: 33770195 PMCID: PMC8187207 DOI: 10.1007/s00125-021-05430-6] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 01/14/2021] [Indexed: 01/06/2023]
Abstract
AIMS/HYPOTHESIS We sought to determine putative relationships among improved mitochondrial respiration, insulin sensitivity and altered skeletal muscle lipids and metabolite signature in response to combined aerobic and resistance training in women with obesity. METHODS This study reports a secondary analysis of a randomised controlled trial including additional measures of mitochondrial respiration, skeletal muscle lipidomics, metabolomics and protein content. Women with obesity were randomised into 12 weeks of combined aerobic and resistance exercise training (n = 20) or control (n = 15) groups. Pre- and post-intervention testing included peak oxygen consumption, whole-body insulin sensitivity (intravenous glucose tolerance test), skeletal muscle mitochondrial respiration (high-resolution respirometry), lipidomics and metabolomics (mass spectrometry) and lipid content (magnetic resonance imaging and spectroscopy). Proteins involved in glucose transport (i.e. GLUT4) and lipid turnover (i.e. sphingomyelin synthase 1 and 2) were assessed by western blotting. RESULTS The original randomised controlled trial showed that exercise training increased insulin sensitivity (median [IQR]; 3.4 [2.0-4.6] to 3.6 [2.4-6.2] x10-5 pmol l-1 min-1), peak oxygen consumption (mean ± SD; 24.9 ± 2.4 to 27.6 ± 3.4 ml kg-1 min-1), and decreased body weight (84.1 ± 8.7 to 83.3 ± 9.7 kg), with an increase in weight (pre intervention, 87.8± 10.9 to post intervention 88.8 ± 11.0 kg) in the control group (interaction p < 0.05). The current study shows an increase in mitochondrial respiration and content in response to exercise training (interaction p < 0.05). The metabolite and lipid signature at baseline were significantly associated with mitochondrial respiratory capacity (p < 0.05) but were not associated with whole-body insulin sensitivity or GLUT4 protein content. Exercise training significantly altered the skeletal muscle lipid profile, increasing specific diacylglycerol(32:2) and ceramide(d18:1/24:0) levels, without changes in other intermediates or total content of diacylglycerol and ceramide. The total content of cardiolipin, phosphatidylcholine (PC) and phosphatidylethanolamine (PE) increased with exercise training with a decrease in the PC:PE ratios containing 22:5 and 20:4 fatty acids. These changes were associated with content-driven increases in mitochondrial respiration (p < 0.05), but not with the increase in whole-body insulin sensitivity or GLUT4 protein content. Exercise training increased sphingomyelin synthase 1 (p < 0.05), with no change in plasma-membrane-located sphingomyelin synthase 2. CONCLUSIONS/INTERPRETATION The major findings of our study were that exercise training altered specific intramuscular lipid intermediates, associated with content-driven increases in mitochondrial respiration but not whole-body insulin sensitivity. This highlights the benefits of exercise training and presents putative target pathways for preventing lipotoxicity in skeletal muscle, which is typically associated with the development of type 2 diabetes.
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Affiliation(s)
- Amy E Mendham
- MRC/Wits Developmental Pathways for Health Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
- Division of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town, South Africa.
| | - Julia H Goedecke
- Division of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town, South Africa
- Non-communicable Diseases Research Unit, South African Medical Research Council, Cape Town, South Africa
| | - Yingxu Zeng
- Hainan Tropical Ocean University, Sanya, Hainan, China
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Steen Larsen
- Center for Healthy Aging, Department of Biomedical Sciences, Copenhagen University, Copenhagen, Denmark
- Clinical Research Centre, Medical University of Bialystok, Bialystok, Poland
| | - Cindy George
- Non-communicable Diseases Research Unit, South African Medical Research Council, Cape Town, South Africa
| | - Jon Hauksson
- Department of Radiation Sciences, Radiation Physics and Biomedical Engineering, Umeå University, Umeå, Sweden
| | - Melony C Fortuin-de Smidt
- Division of Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town, South Africa
- Non-communicable Diseases Research Unit, South African Medical Research Council, Cape Town, South Africa
| | - Alexander V Chibalin
- Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden
| | - Tommy Olsson
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Elin Chorell
- Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden.
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38
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Joubert F, Puff N. Mitochondrial Cristae Architecture and Functions: Lessons from Minimal Model Systems. MEMBRANES 2021; 11:membranes11070465. [PMID: 34201754 PMCID: PMC8306996 DOI: 10.3390/membranes11070465] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 12/23/2022]
Abstract
Mitochondria are known as the powerhouse of eukaryotic cells. Energy production occurs in specific dynamic membrane invaginations in the inner mitochondrial membrane called cristae. Although the integrity of these structures is recognized as a key point for proper mitochondrial function, less is known about the mechanisms at the origin of their plasticity and organization, and how they can influence mitochondria function. Here, we review the studies which question the role of lipid membrane composition based mainly on minimal model systems.
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Affiliation(s)
- Frédéric Joubert
- Laboratoire Jean Perrin, CNRS, Sorbonne Université, UMR 8237, 75005 Paris, France;
| | - Nicolas Puff
- Faculté des Sciences et Ingénierie, Sorbonne Université, UFR 925 Physique, 75005 Paris, France
- Laboratoire Matière et Systèmes Complexes (MSC), Université Paris Diderot-Paris 7, UMR 7057 CNRS, 75013 Paris, France
- Correspondence:
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39
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Hernansanz-Agustín P, Enríquez JA. Functional segmentation of CoQ and cyt c pools by respiratory complex superassembly. Free Radic Biol Med 2021; 167:232-242. [PMID: 33722627 DOI: 10.1016/j.freeradbiomed.2021.03.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 02/23/2021] [Accepted: 03/07/2021] [Indexed: 12/25/2022]
Abstract
Electron transfer between respiratory complexes is an essential step for the efficiency of the mitochondrial oxidative phosphorylation. Until recently, it was stablished that ubiquinone and cytochrome c formed homogenous single pools in the inner mitochondrial membrane which were not influenced by the presence of respiratory supercomplexes. However, this idea was challenged by the fact that bottlenecks in electron transfer appeared after disruption of supercomplexes into their individual complexes. The postulation of the plasticity model embraced all these observations and concluded that complexes and supercomplexes co-exist and are dedicated to a spectrum of metabolic requirements. Here, we review the involvement of superassembly in complex I stability, the role of supercomplexes in ROS production and the segmentation of the CoQ and cyt c pools, together with their involvement in signaling and disease. Taking apparently conflicting literature we have built up a comprehensive model for the segmentation of CoQ and cyt c mediated by supercomplexes, discuss the current limitations and provide a prospect of the current knowledge in the field.
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Affiliation(s)
- Pablo Hernansanz-Agustín
- Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III CNIC, Melchor Fernández Almagro 3, Madrid, 28029, Spain.
| | - José Antonio Enríquez
- Fundación Centro Nacional de Investigaciones Cardiovasculares Carlos III CNIC, Melchor Fernández Almagro 3, Madrid, 28029, Spain; Centro de Investigaciones Biomédicas en Red de Fragilidad y Envejecimiento Saludable-CIBERFES. Av. Monforte de Lemos, 3-5. Pabellón 11, Planta 0 28029, Madrid, Spain.
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40
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Verkerke ARP, Kajimura S. Oil does more than light the lamp: The multifaceted role of lipids in thermogenic fat. Dev Cell 2021; 56:1408-1416. [PMID: 34004150 DOI: 10.1016/j.devcel.2021.04.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 03/25/2021] [Accepted: 04/16/2021] [Indexed: 01/23/2023]
Abstract
Brown and beige adipocytes, or thermogenic fat, were initially thought to be merely a thermogenic organ. However, emerging evidence suggests its multifaceted roles in the regulation of systemic glucose and lipid homeostasis that go beyond enhancing thermogenesis. One of the important functions of thermogenic fat is as a "metabolic sink" for glucose, fatty acids, and amino acids, which profoundly impacts metabolite clearance and oxidation. Importantly, lipids are not only the predominant fuel source used for thermogenesis but are also essential molecules for development, cellular signaling, and structural components. Here, we review the multifaceted role of lipids in thermogenic adipocytes.
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Affiliation(s)
- Anthony R P Verkerke
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Shingo Kajimura
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.
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41
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IGF2 deficiency causes mitochondrial defects in skeletal muscle. Clin Sci (Lond) 2021; 135:979-990. [PMID: 33825857 PMCID: PMC8055961 DOI: 10.1042/cs20210128] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Revised: 04/01/2021] [Accepted: 04/06/2021] [Indexed: 01/25/2023]
Abstract
Exercise training improves muscle fitness in many aspects, including induction of mitochondrial biogenesis and maintenance of mitochondrial dynamics. The insulin-like growth factors were recently proposed as key regulators of myogenic factors to regulate muscle development. The present study aimed to investigate the physical exercise impact on insulin-like growth factor 2 (IGF2) and analyzed its functions on skeletal muscle cells in vitro. Using online databases, we stated that IGF2 was relatively highly expressed in skeletal muscle cells and increased after exercise training. Then, IGF2 deficiency in myotubes from C2C12 and primary skeletal muscle cells (PMSCs) led to impaired mitochondrial function, reduced mitochondria-related protein content, and decreased mitochondrial biogenesis. Furthermore, we explored the possible regulatory pathway and found that mitochondrial regulation in skeletal muscle cells might occur through IGF2-Sirtuin 1 (SIRT1)-peroxisome proliferator-activated receptor-γ co-activator-1α (PGC1α) signaling pathway. Therefore, the present study first demonstrated the relationship between IGF2 and mitochondria in skeletal muscle.
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42
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Ferrara PJ, Rong X, Maschek JA, Verkerke AR, Siripoksup P, Song H, Green TD, Krishnan KC, Johnson JM, Turk J, Houmard JA, Lusis AJ, Drummond MJ, McClung JM, Cox JE, Shaikh SR, Tontonoz P, Holland WL, Funai K. Lysophospholipid acylation modulates plasma membrane lipid organization and insulin sensitivity in skeletal muscle. J Clin Invest 2021; 131:135963. [PMID: 33591957 DOI: 10.1172/jci135963] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/11/2021] [Indexed: 01/09/2023] Open
Abstract
Aberrant lipid metabolism promotes the development of skeletal muscle insulin resistance, but the exact identity of lipid-mediated mechanisms relevant to human obesity remains unclear. A comprehensive lipidomic analysis of primary myocytes from individuals who were insulin-sensitive and lean (LN) or insulin-resistant with obesity (OB) revealed several species of lysophospholipids (lyso-PLs) that were differentially abundant. These changes coincided with greater expression of lysophosphatidylcholine acyltransferase 3 (LPCAT3), an enzyme involved in phospholipid transacylation (Lands cycle). Strikingly, mice with skeletal muscle-specific knockout of LPCAT3 (LPCAT3-MKO) exhibited greater muscle lysophosphatidylcholine/phosphatidylcholine, concomitant with improved skeletal muscle insulin sensitivity. Conversely, skeletal muscle-specific overexpression of LPCAT3 (LPCAT3-MKI) promoted glucose intolerance. The absence of LPCAT3 reduced phospholipid packing of cellular membranes and increased plasma membrane lipid clustering, suggesting that LPCAT3 affects insulin receptor phosphorylation by modulating plasma membrane lipid organization. In conclusion, obesity accelerates the skeletal muscle Lands cycle, whose consequence might induce the disruption of plasma membrane organization that suppresses muscle insulin action.
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Affiliation(s)
- Patrick J Ferrara
- Diabetes and Metabolism Research Center and.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes and Obesity Institute and.,Human Performance Laboratory, East Carolina University, Greenville, North Carolina, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Xin Rong
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, California, USA
| | - J Alan Maschek
- Diabetes and Metabolism Research Center and.,Metabolomics, Mass Spectrometry, and Proteomics Core and
| | - Anthony Rp Verkerke
- Diabetes and Metabolism Research Center and.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes and Obesity Institute and.,Human Performance Laboratory, East Carolina University, Greenville, North Carolina, USA
| | - Piyarat Siripoksup
- Diabetes and Metabolism Research Center and.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | - Haowei Song
- Division of Endocrinology Metabolism and Lipid Research, School of Medicine, Washington University in St. Louis, St. Louis, Missouri, USA
| | | | | | - Jordan M Johnson
- Diabetes and Metabolism Research Center and.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes and Obesity Institute and.,Human Performance Laboratory, East Carolina University, Greenville, North Carolina, USA
| | - John Turk
- Division of Endocrinology Metabolism and Lipid Research, School of Medicine, Washington University in St. Louis, St. Louis, Missouri, USA
| | - Joseph A Houmard
- East Carolina Diabetes and Obesity Institute and.,Human Performance Laboratory, East Carolina University, Greenville, North Carolina, USA
| | - Aldons J Lusis
- Cardiology Division, Department of Medicine, UCLA, Los Angeles, California, USA
| | - Micah J Drummond
- Diabetes and Metabolism Research Center and.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
| | | | - James E Cox
- Diabetes and Metabolism Research Center and.,Metabolomics, Mass Spectrometry, and Proteomics Core and.,Department of Biochemistry, University of Utah, Salt Lake City, Utah, USA
| | - Saame Raza Shaikh
- East Carolina Diabetes and Obesity Institute and.,Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Peter Tontonoz
- Department of Pathology and Laboratory Medicine, UCLA, Los Angeles, California, USA
| | - William L Holland
- Diabetes and Metabolism Research Center and.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA
| | - Katsuhiko Funai
- Diabetes and Metabolism Research Center and.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah, USA.,East Carolina Diabetes and Obesity Institute and.,Human Performance Laboratory, East Carolina University, Greenville, North Carolina, USA.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah, USA.,Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah, USA
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43
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Acoba MG, Senoo N, Claypool SM. Phospholipid ebb and flow makes mitochondria go. J Cell Biol 2021; 219:151918. [PMID: 32614384 PMCID: PMC7401802 DOI: 10.1083/jcb.202003131] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/28/2020] [Accepted: 06/02/2020] [Indexed: 01/19/2023] Open
Abstract
Mitochondria, so much more than just being energy factories, also have the capacity to synthesize macromolecules including phospholipids, particularly cardiolipin (CL) and phosphatidylethanolamine (PE). Phospholipids are vital constituents of mitochondrial membranes, impacting the plethora of functions performed by this organelle. Hence, the orchestrated movement of phospholipids to and from the mitochondrion is essential for cellular integrity. In this review, we capture recent advances in the field of mitochondrial phospholipid biosynthesis and trafficking, highlighting the significance of interorganellar communication, intramitochondrial contact sites, and lipid transfer proteins in maintaining membrane homeostasis. We then discuss the physiological functions of CL and PE, specifically how they associate with protein complexes in mitochondrial membranes to support bioenergetics and maintain mitochondrial architecture.
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Affiliation(s)
- Michelle Grace Acoba
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Nanami Senoo
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Steven M Claypool
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD
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44
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Sam PN, Calzada E, Acoba MG, Zhao T, Watanabe Y, Nejatfard A, Trinidad JC, Shutt TE, Neal SE, Claypool SM. Impaired phosphatidylethanolamine metabolism activates a reversible stress response that detects and resolves mutant mitochondrial precursors. iScience 2021; 24:102196. [PMID: 33718843 PMCID: PMC7921845 DOI: 10.1016/j.isci.2021.102196] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Revised: 01/27/2021] [Accepted: 02/10/2021] [Indexed: 02/06/2023] Open
Abstract
Phosphatidylethanolamine (PE) made in mitochondria has long been recognized as an important precursor for phosphatidylcholine production that occurs in the endoplasmic reticulum (ER). Recently, the strict mitochondrial localization of the enzyme that makes PE in the mitochondrion, phosphatidylserine decarboxylase 1 (Psd1), was questioned. Since a dual localization of Psd1 to the ER would have far-reaching implications, we initiated our study to independently re-assess the subcellular distribution of Psd1. Our results support the unavoidable conclusion that the vast majority, if not all, of functional Psd1 resides in the mitochondrion. Through our efforts, we discovered that mutant forms of Psd1 that impair a self-processing step needed for it to become functional are dually localized to the ER when expressed in a PE-limiting environment. We conclude that severely impaired cellular PE metabolism provokes an ER-assisted adaptive response that is capable of identifying and resolving nonfunctional mitochondrial precursors.
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Affiliation(s)
- Pingdewinde N. Sam
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Elizabeth Calzada
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Michelle Grace Acoba
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Tian Zhao
- Departments of Medical Genetics and Biochemistry & Molecular Biology, Cumming School of Medicine, Alberta Children's Hospital Research Institute, Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Yasunori Watanabe
- Faculty of Science, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata, Yamagata 990-8560, Japan
| | - Anahita Nejatfard
- Division of Biological Sciences, The Section of Cell and Developmental Biology, University of California San Diego, La Jolla, CA, USA
| | | | - Timothy E. Shutt
- Faculty of Science, Yamagata University, 1-4-12 Kojirakawa-machi, Yamagata, Yamagata 990-8560, Japan
| | - Sonya E. Neal
- Division of Biological Sciences, The Section of Cell and Developmental Biology, University of California San Diego, La Jolla, CA, USA
| | - Steven M. Claypool
- Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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45
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Revealing the role of glycerophospholipid metabolism in asthma through plasma lipidomics. Clin Chim Acta 2020; 513:34-42. [PMID: 33307061 DOI: 10.1016/j.cca.2020.11.026] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 11/09/2020] [Accepted: 11/29/2020] [Indexed: 01/18/2023]
Abstract
Lipid mediators play an essential role in the pathogenesis of asthma. Many studies on the differential expression of sphingolipids and fatty acid exist, but relatively few concerned about glycerophospholipid (GP) metabolites in asthma. Here, plasma samples from 20 healthy controls and 24 asthmatic patients were collected and analyzed. High-performance liquid chromatography with quadrupole time-of-flight mass spectrometry (HPLC-QTOF-MS) revealed that 29 GPs were identified and relatively quantified as differential metabolites for discriminating asthma patients and healthy subjects, consisting of six major subclasses of GPs. Moreover, a significant relevance was found between the selected metabolites and diagnostic and prognostic indicators of asthma. Remarkably, in subgroup analyses, plasma phosphatidic acid (PA), phosphatidylglycerol (PG), and phosphatidylethanolamine (PE) levels were higher in patients with eosinophilic asthma than non-eosinophilic asthma. Receiver-operating characteristic curve analysis revealed that the power of plasma PA and PG levels to distinguish between asthmatic patients and healthy subjects was strong (all areas under the curves > 0.9; P < 0.05). Our study characterized circulating GP metabolites in patients with asthma and explored their clinical relevance which may help to develop reliable biomarkers for early and accurate diagnosis based on lipid metabolites and provide novel insight into the role of GPs in asthma.
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46
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Skeletal Phenotypes Due to Abnormalities in Mitochondrial Protein Homeostasis and Import. Int J Mol Sci 2020; 21:ijms21218327. [PMID: 33171986 PMCID: PMC7664180 DOI: 10.3390/ijms21218327] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2020] [Revised: 10/28/2020] [Accepted: 11/03/2020] [Indexed: 12/19/2022] Open
Abstract
Mitochondrial disease represents a collection of rare genetic disorders caused by mitochondrial dysfunction. These disorders can be quite complex and heterogeneous, and it is recognized that mitochondrial disease can affect any tissue at any age. The reasons for this variability are not well understood. In this review, we develop and expand a subset of mitochondrial diseases including predominantly skeletal phenotypes. Understanding how impairment ofdiverse mitochondrial functions leads to a skeletal phenotype will help diagnose and treat patients with mitochondrial disease and provide additional insight into the growing list of human pathologies associated with mitochondrial dysfunction. The underlying disease genes encode factors involved in various aspects of mitochondrial protein homeostasis, including proteases and chaperones, mitochondrial protein import machinery, mediators of inner mitochondrial membrane lipid homeostasis, and aminoacylation of mitochondrial tRNAs required for translation. We further discuss a complex of frequently associated phenotypes (short stature, cataracts, and cardiomyopathy) potentially explained by alterations to steroidogenesis, a process regulated by mitochondria. Together, these observations provide novel insight into the consequences of impaired mitochondrial protein homeostasis.
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47
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Jiang D, Liu C, Chen Y, Xing X, Zheng D, Guo Z, Lin S. Metabolomics Study of Whole-body Vibration on Lipid Metabolism of Skeletal Muscle in Aging Mice. Int J Sports Med 2020; 42:464-477. [PMID: 33124015 DOI: 10.1055/a-1268-8458] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Ageing increases the occurrence and development of many diseases. Exercise is believed to be an effective way to improve ageing and skeletal muscle atrophy. However, many elderly people are unable to engage in active exercise. Whole-body vibration is a passive way of moving that is especially suitable for the elderly and people who find it inconvenient to exercise. Metabolomics is the systematic study of metabolic changes in small molecules. In this study, metabolomics studies were performed to investigate the regulatory effect of whole-body vibration on the skeletal muscles of ageing mice. After 12 weeks, we found that whole-body vibration had the most obvious effect on lipid metabolism pathways (such as linoleic acid, α-linolenic acid metabolism, glycerophospholipid metabolism pathways) in skeletal muscle of ageing mice. Through further research we found that whole-body vibration decreased the levels of triglycerides, total cholesterol, low-density lipoprotein cholesterol and very low-density lipoprotein in blood; decreased the lipid deposition in skeletal muscle; decreased the protein expression of monocyte chemoattractant protein-1 and interleukin-6; improved the protein levels of phosphorylated insulin receptor substrate-1, phosphate phosphoinositide 3-kinase and p-AKT; improved the protein levels of klotho; and decreased the protein expression of p53. These findings reveal that whole-body vibration might postpone senility by attenuating lipid deposition and reducing chronic inflammation and the insulin resistance of skeletal muscle.
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Affiliation(s)
- Dingwen Jiang
- The First Affiliated Hospital of Jinan University, Jinan University, Guangzhou.,Department of Endocrinology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou
| | - Chang Liu
- Department of Endocrinology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou
| | - Ye Chen
- College of Mechanical Engineering and Automation, Liaoning University of Technology, Jinzhou
| | - Xuejiao Xing
- Department of Endocrinology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou
| | - Danmeng Zheng
- Department of Endocrinology, First Affiliated Hospital of Jinzhou Medical University, Jinzhou
| | - Zhanpeng Guo
- Department of Orthopedics, First Affiliated Hospital of Jinzhou Medical University, Jinzhou
| | - Sen Lin
- Department of Orthopedics, First Affiliated Hospital of Jinzhou Medical University, Jinzhou
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48
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Zhao H, Wang T. PE homeostasis rebalanced through mitochondria-ER lipid exchange prevents retinal degeneration in Drosophila. PLoS Genet 2020; 16:e1009070. [PMID: 33064773 PMCID: PMC7592913 DOI: 10.1371/journal.pgen.1009070] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 10/28/2020] [Accepted: 08/21/2020] [Indexed: 02/06/2023] Open
Abstract
The major glycerophospholipid phosphatidylethanolamine (PE) in the nervous system is essential for neural development and function. There are two major PE synthesis pathways, the CDP-ethanolamine pathway in the endoplasmic reticulum (ER) and the phosphatidylserine decarboxylase (PSD) pathway in mitochondria. However, the role played by mitochondrial PE synthesis in maintaining cellular PE homeostasis is unknown. Here, we show that Drosophila pect (phosphoethanolamine cytidylyltransferase) mutants lacking the CDP-ethanolamine pathway, exhibited alterations in phospholipid composition, defective phototransduction, and retinal degeneration. Induction of the PSD pathway fully restored levels and composition of cellular PE, thus rescued the retinal degeneration and defective visual responses in pect mutants. Disrupting lipid exchange between mitochondria and ER blocked the ability of PSD to rescue pect mutant phenotypes. These findings provide direct evidence that the synthesis of PE in mitochondria contributes to cellular PE homeostasis, and suggest the induction of mitochondrial PE synthesis as a promising therapeutic approach for disorders associated with PE deficiency.
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Affiliation(s)
- Haifang Zhao
- National Institute of Biological Sciences, Beijing, China
| | - Tao Wang
- National Institute of Biological Sciences, Beijing, China
- Tsinghua Institute of Multidisciplinary Biomedical Research, Tsinghua University, Beijing, China
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49
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Eshima H, Siripoksup P, Mahmassani ZS, Johnson JM, Ferrara PJ, Verkerke ARP, Salcedo A, Drummond MJ, Funai K. Neutralizing mitochondrial ROS does not rescue muscle atrophy induced by hindlimb unloading in female mice. J Appl Physiol (1985) 2020; 129:124-132. [PMID: 32552434 DOI: 10.1152/japplphysiol.00456.2019] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Excess reactive oxygen species (ROS) induced by physical inactivity is associated with muscle atrophy and muscle weakness. However, the role of mitochondrial ROS on disuse-induced muscle atrophy is not fully understood. The purpose of this study was to utilize a genetic strategy to examine the effect of neutralizing mitochondrial ROS on disuse-induced skeletal muscle atrophy. This was accomplished by placing wild-type (WT) and mitochondrial-targeted catalase-expressing (MCAT) littermate mice on 7 days of hindlimb unloading. After assessment of body weight and composition, muscles were analyzed for individual muscle mass, force-generating capacity, fiber type, cross-sectional area, and mitochondrial function, including H2O2 production. Despite a successful attenuation of mitochondrial ROS, MCAT mice were not protected from muscle atrophy. No differences were observed in body composition, lean mass, individual muscle masses, force-generating capacity, or muscle fiber cross-sectional area. These data suggest that neutralizing mitochondrial ROS is insufficient to suppress disuse-induced loss of skeletal muscle mass and contractile function.NEW & NOTEWORTHY The premise of this study was to examine the efficacy of genetic suppression of mitochondrial reactive oxygen species (ROS) to attenuate disuse-induced muscle atrophy and muscle weakness. Neutralization of mitochondrial ROS by MCAT expression was insufficient to rescue muscle atrophy and muscle weakness.
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Affiliation(s)
- Hiroaki Eshima
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah
| | - Piyarat Siripoksup
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah
| | - Ziad S Mahmassani
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah
| | - Jordan M Johnson
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Patrick J Ferrara
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Anthony R P Verkerke
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Anahy Salcedo
- Diabetes and Metabolism Research Center, University of Utah, Salt Lake City, Utah
| | - Micah J Drummond
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah
| | - Katsuhiko Funai
- Department of Physical Therapy and Athletic Training, University of Utah, Salt Lake City, Utah.,Molecular Medicine Program, University of Utah, Salt Lake City, Utah
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50
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Hinkley JM, Cornnell HH, Standley RA, Chen EY, Narain NR, Greenwood BP, Bussberg V, Tolstikov VV, Kiebish MA, Yi F, Vega RB, Goodpaster BH, Coen PM. Older adults with sarcopenia have distinct skeletal muscle phosphodiester, phosphocreatine, and phospholipid profiles. Aging Cell 2020; 19:e13135. [PMID: 32468656 PMCID: PMC7294783 DOI: 10.1111/acel.13135] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 02/04/2020] [Accepted: 02/23/2020] [Indexed: 12/12/2022] Open
Abstract
The loss of skeletal muscle mass and function with age (sarcopenia) is a critical healthcare challenge for older adults. 31‐phosphorus magnetic resonance spectroscopy (31P‐MRS) is a powerful tool used to evaluate phosphorus metabolite levels in muscle. Here, we sought to determine which phosphorus metabolites were linked with reduced muscle mass and function in older adults. This investigation was conducted across two separate studies. Resting phosphorus metabolites in skeletal muscle were examined by 31P‐MRS. In the first study, fifty‐five older adults with obesity were enrolled and we found that resting phosphocreatine (PCr) was positively associated with muscle volume and knee extensor peak power, while a phosphodiester peak (PDE2) was negatively related to these variables. In the second study, we examined well‐phenotyped older adults that were classified as nonsarcopenic or sarcopenic based on sex‐specific criteria described by the European Working Group on Sarcopenia in Older People. PCr content was lower in muscle from older adults with sarcopenia compared to controls, while PDE2 was elevated. Percutaneous biopsy specimens of the vastus lateralis were obtained for metabolomic and lipidomic analyses. Lower PCr was related to higher muscle creatine. PDE2 was associated with glycerol‐phosphoethanolamine levels, a putative marker of phospholipid membrane damage. Lipidomic analyses revealed that the major phospholipids, (phosphatidylcholine, phosphatidylethanolamine, and phosphatidylglycerol) were elevated in sarcopenic muscle and were inversely related to muscle volume and peak power. These data suggest phosphorus metabolites and phospholipids are associated with the loss of skeletal muscle mass and function in older adults.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Fanchao Yi
- AdventHealth Translational Research Institute Orlando FL USA
| | - Rick B. Vega
- AdventHealth Translational Research Institute Orlando FL USA
| | | | - Paul M. Coen
- AdventHealth Translational Research Institute Orlando FL USA
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