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Grima-Terrén M, Campanario S, Ramírez-Pardo I, Cisneros A, Hong X, Perdiguero E, Serrano AL, Isern J, Muñoz-Cánoves P. Muscle aging and sarcopenia: The pathology, etiology, and most promising therapeutic targets. Mol Aspects Med 2024; 100:101319. [PMID: 39312874 DOI: 10.1016/j.mam.2024.101319] [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: 02/27/2024] [Revised: 09/13/2024] [Accepted: 09/16/2024] [Indexed: 09/25/2024]
Abstract
Sarcopenia is a progressive muscle wasting disorder that severely impacts the quality of life of elderly individuals. Although the natural aging process primarily causes sarcopenia, it can develop in response to other conditions. Because muscle function is influenced by numerous changes that occur with age, the etiology of sarcopenia remains unclear. However, recent characterizations of the aging muscle transcriptional landscape, signaling pathway disruptions, fiber and extracellular matrix compositions, systemic metabolomic and inflammatory responses, mitochondrial function, and neurological inputs offer insights and hope for future treatments. This review will discuss age-related changes in healthy muscle and our current understanding of how this can deteriorate into sarcopenia. As our elderly population continues to grow, we must understand sarcopenia and find treatments that allow individuals to maintain independence and dignity throughout an extended lifespan.
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Affiliation(s)
- Mercedes Grima-Terrén
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA; Department of Medicine and Life Sciences, Universitat Pompeu Fabra (UPF), Barcelona, 08003, Spain
| | - Silvia Campanario
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA; Department of Medicine and Life Sciences, Universitat Pompeu Fabra (UPF), Barcelona, 08003, Spain
| | - Ignacio Ramírez-Pardo
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA; Department of Medicine and Life Sciences, Universitat Pompeu Fabra (UPF), Barcelona, 08003, Spain
| | - Andrés Cisneros
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA; Department of Medicine and Life Sciences, Universitat Pompeu Fabra (UPF), Barcelona, 08003, Spain
| | - Xiaotong Hong
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA
| | | | - Antonio L Serrano
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA
| | - Joan Isern
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA
| | - Pura Muñoz-Cánoves
- Altos Labs, San Diego Institute of Science, San Diego, CA, 92121, USA; Department of Medicine and Life Sciences, Universitat Pompeu Fabra (UPF), Barcelona, 08003, Spain.
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2
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Emmert ME, Emmert AS, Goh Q, Cornwall R. Sexual dimorphisms in skeletal muscle: current concepts and research horizons. J Appl Physiol (1985) 2024; 137:274-299. [PMID: 38779763 PMCID: PMC11343095 DOI: 10.1152/japplphysiol.00529.2023] [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: 07/31/2023] [Revised: 05/21/2024] [Accepted: 05/21/2024] [Indexed: 05/25/2024] Open
Abstract
The complex compositional and functional nature of skeletal muscle makes this organ an essential topic of study for biomedical researchers and clinicians. An additional layer of complexity is added with the consideration of sex as a biological variable. Recent research advances have revealed sexual dimorphisms in developmental biology, muscle homeostasis, adaptive responses, and disorders relating to skeletal muscle. Many of the observed sex differences have hormonal and molecular mechanistic underpinnings, whereas others have yet to be elucidated. Future research is needed to investigate the mechanisms dictating sex-based differences in the various aspects of skeletal muscle. As such, it is necessary that skeletal muscle biologists ensure that both female and male subjects are represented in biomedical and clinical studies to facilitate the successful testing and development of therapeutics for all patients.
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Affiliation(s)
- Marianne E Emmert
- Division of Orthopaedic Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
| | - Andrew S Emmert
- Department of Orthopaedic Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States
| | - Qingnian Goh
- Division of Orthopaedic Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
- Department of Orthopaedic Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States
| | - Roger Cornwall
- Division of Orthopaedic Surgery, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
- Department of Orthopaedic Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio, United States
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3
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Takahashi K, Kitaoka Y, Hatta H. Better maintenance of enzymatic capacity and higher levels of substrate transporter proteins in skeletal muscle of aging female mice. Appl Physiol Nutr Metab 2024; 49:1100-1114. [PMID: 38710106 DOI: 10.1139/apnm-2024-0016] [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] [Indexed: 05/08/2024]
Abstract
This study investigated sex-specific differences in high-energy phosphate, glycolytic, and mitochondrial enzyme activities and also metabolite transporter protein levels in the skeletal muscles of adult (5 months old), middle-aged (12 months old), and advanced-aged (24 months old) mice. While gastrocnemius glycogen content increased with age regardless of sex, gastrocnemius triglyceride levels increased only in advanced-aged female mice. Aging decreased creatine kinase and adenylate kinase activities in the plantaris muscle of both sexes and in the soleus muscle of male mice but not in female mice. Irrespective of sex, phosphofructokinase and lactate dehydrogenase (LDH) activities decreased in the plantaris and soleus muscles. Additionally, hexokinase activity in the plantaris muscle and LDH activity in the soleus muscle decreased to a greater extent in aged male mice compared with those in aged female mice. Mitochondrial enzyme activities increased in the plantaris muscle of aged female mice but did not change in male mice. The protein content of the glucose transporter 4 in the aged plantaris muscle and fatty acid translocase/cluster of differentiation 36 increased in the aged plantaris and soleus muscles of both sexes, with a significantly higher content in female mice. These findings suggest that females possess a better ability to maintain metabolic enzyme activity and higher levels of metabolite transport proteins in skeletal muscle during aging, despite alterations in lipid metabolism. Our data provide a basis for studying muscle metabolism in the context of age-dependent metabolic perturbations and diseases that affect females and males differently.
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Affiliation(s)
- Kenya Takahashi
- Department of Sports Sciences, The University of Tokyo, 3-8-1, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Yu Kitaoka
- Department of Human Sciences, Kanagawa University, 3-27-1, Rokkakubashi, Kanagawa-ku, Yokohama, Kanagawa 221-8686, Japan
| | - Hideo Hatta
- Department of Sports Sciences, The University of Tokyo, 3-8-1, Komaba, Meguro-ku, Tokyo 153-8902, Japan
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4
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Deane C, Piasecki M, Atherton P. Skeletal muscle immobilisation-induced atrophy: mechanistic insights from human studies. Clin Sci (Lond) 2024; 138:741-756. [PMID: 38895777 PMCID: PMC11186857 DOI: 10.1042/cs20231198] [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: 02/16/2024] [Revised: 05/28/2024] [Accepted: 06/04/2024] [Indexed: 06/21/2024]
Abstract
Periods of skeletal muscle disuse lead to rapid declines in muscle mass (atrophy), which is fundamentally underpinned by an imbalance between muscle protein synthesis (MPS) and muscle protein breakdown (MPB). The complex interplay of molecular mechanisms contributing to the altered regulation of muscle protein balance during disuse have been investigated but rarely synthesised in the context of humans. This narrative review discusses human models of muscle disuse and the ensuing inversely exponential rate of muscle atrophy. The molecular processes contributing to altered protein balance are explored, with a particular focus on growth and breakdown signalling pathways, mitochondrial adaptations and neuromuscular dysfunction. Finally, key research gaps within the disuse atrophy literature are highlighted providing future avenues to enhance our mechanistic understanding of human disuse atrophy.
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Affiliation(s)
- Colleen S. Deane
- Human Development and Health, Faculty of Medicine, University of Southampton, Southampton General Hospital, U.K
| | - Matthew Piasecki
- Centre of Metabolism, Ageing and Physiology (CoMAP), Medical Research Council/Versus Arthritis UK Centre of Excellence for Musculoskeletal Ageing Research (CMAR), National Institute of Health Research (NIHR) Biomedical Research Centre (BRC), University of Nottingham, U.K
| | - Philip J. Atherton
- Centre of Metabolism, Ageing and Physiology (CoMAP), Medical Research Council/Versus Arthritis UK Centre of Excellence for Musculoskeletal Ageing Research (CMAR), National Institute of Health Research (NIHR) Biomedical Research Centre (BRC), University of Nottingham, U.K
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5
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Huber HF, Li C, Xie D, Gerow KG, Register TC, Shively CA, Cox LA, Nathanielsz PW. Female baboon adrenal zona fasciculata and zona reticularis regulatory and functional proteins decrease across the life course. GeroScience 2024; 46:3405-3417. [PMID: 38311700 PMCID: PMC11009170 DOI: 10.1007/s11357-024-01080-9] [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: 09/07/2023] [Accepted: 01/09/2024] [Indexed: 02/06/2024] Open
Abstract
Debate exists on life-course adrenocortical zonal function trajectories. Rapid, phasic blood steroid concentration changes, such as circadian rhythms and acute stress responses, complicate quantification. To avoid pitfalls and account for life-stage changes in adrenocortical activity indices, we quantified zonae fasciculata (ZF) and reticularis (ZR) across the life-course, by immunohistochemistry of key regulatory and functional proteins. In 28 female baboon adrenals (7.5-22.1 years), we quantified 12 key proteins involved in cell metabolism, division, proliferation, steroidogenesis (including steroid acute regulatory protein, StAR), oxidative stress, and glucocorticoid and mitochondrial function. Life-course abundance of ten ZF proteins decreased with age. Cell cycle inhibitor and oxidative stress markers increased. Seven of the 12 proteins changed in the same direction for ZR and ZF. Importantly, ZF StAR decreased, while ZR StAR was unchanged. Findings indicate ZF function decreased, and less markedly ZR function, with age. Causes and aging consequences of these changes remain to be determined.
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Affiliation(s)
- Hillary Fries Huber
- Southwest National Primate Research Center, Texas Biomedical Research Institute, 8715 W. Military, San Antonio, TX, 78227, USA.
| | - Cun Li
- Texas Pregnancy & Life-Course Health Research Center, Animal Science, University of Wyoming, Laramie, WY, USA
| | - Dongbin Xie
- Texas Pregnancy & Life-Course Health Research Center, Animal Science, University of Wyoming, Laramie, WY, USA
| | | | - Thomas C Register
- Pathology-Comparative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Carol A Shively
- Pathology-Comparative Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Laura A Cox
- Southwest National Primate Research Center, Texas Biomedical Research Institute, 8715 W. Military, San Antonio, TX, 78227, USA
- Center for Precision Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Peter W Nathanielsz
- Southwest National Primate Research Center, Texas Biomedical Research Institute, 8715 W. Military, San Antonio, TX, 78227, USA
- Texas Pregnancy & Life-Course Health Research Center, Animal Science, University of Wyoming, Laramie, WY, USA
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6
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Lee MJC, Saner NJ, Ferri A, García-Domínguez E, Broatch JR, Bishop DJ. Delineating the contribution of ageing and physical activity to changes in mitochondrial characteristics across the lifespan. Mol Aspects Med 2024; 97:101272. [PMID: 38626488 DOI: 10.1016/j.mam.2024.101272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 03/20/2024] [Accepted: 03/22/2024] [Indexed: 04/18/2024]
Abstract
Ageing is associated with widespread physiological changes prominent within all tissues, including skeletal muscle and the brain, which lead to a decline in physical function. To tackle the growing health and economic burdens associated with an ageing population, the concept of healthy ageing has become a major research priority. Changes in skeletal muscle mitochondrial characteristics have been suggested to make an important contribution to the reductions in skeletal muscle function with age, and age-related changes in mitochondrial content, respiratory function, morphology, and mitochondrial DNA have previously been reported. However, not all studies report changes in mitochondrial characteristics with ageing, and there is increasing evidence to suggest that physical activity (or inactivity) throughout life is a confounding factor when interpreting age-associated changes. Given that physical activity is a potent stimulus for inducing beneficial adaptations to mitochondrial characteristics, delineating the influence of physical activity on the changes in skeletal muscle that occur with age is complicated. This review aims to summarise our current understanding and knowledge gaps regarding age-related changes to mitochondrial characteristics within skeletal muscle, as well as to provide some novel insights into brain mitochondria, and to propose avenues of future research and targeted interventions. Furthermore, where possible, we incorporate discussions of the modifying effects of physical activity, exercise, and training status, to purported age-related changes in mitochondrial characteristics.
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Affiliation(s)
- Matthew J-C Lee
- The Exercise Prescription Lab (EPL), Institute for Health and Sport (IHES), Victoria University, Melbourne, Victoria, Australia
| | - Nicholas J Saner
- The Exercise Prescription Lab (EPL), Institute for Health and Sport (IHES), Victoria University, Melbourne, Victoria, Australia
| | - Alessandra Ferri
- The Exercise Prescription Lab (EPL), Institute for Health and Sport (IHES), Victoria University, Melbourne, Victoria, Australia
| | - Esther García-Domínguez
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia; Freshage Research Group, Department of Physiology, Faculty of Medicine, University of Valencia and CIBERFES, Fundación Investigación Hospital Clínico Universitario/INCLIVA, Valencia, Spain
| | - James R Broatch
- The Exercise Prescription Lab (EPL), Institute for Health and Sport (IHES), Victoria University, Melbourne, Victoria, Australia
| | - David J Bishop
- The Exercise Prescription Lab (EPL), Institute for Health and Sport (IHES), Victoria University, Melbourne, Victoria, Australia.
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7
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Shekarchian A, Bandarian F, Hadizadeh A, Amirsardari Z, Sharifi Y, Ayati A, Varmaghani M, Shandiz AF, Sharifi F, Ghadery AH, Tayanloo A, Yavari T, Larijani B, Payab M, Ebrahimpur M. Exploring the metabolomics profile of frailty- a systematic review. J Diabetes Metab Disord 2024; 23:289-303. [PMID: 38932837 PMCID: PMC11196473 DOI: 10.1007/s40200-023-01379-y] [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: 11/26/2023] [Accepted: 12/19/2023] [Indexed: 06/28/2024]
Abstract
Background Frailty is a multifaceted geriatric syndrome characterized by an increased vulnerability to stressful events. metabolomics studies are valuable tool for better understanding the underlying mechanisms of pathologic conditions. This review aimed to elucidate the metabolomics profile of frailty. Method This systematic review was conducted in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-analysis (PRISMA) 2020 statement. A comprehensive search was conducted across multiple databases. Initially, 5027 results were retrieved, and after removing duplicates, 1838 unique studies were subjected to screening. Subsequently, 248 studies underwent full-text screening, with 21 studies ultimately included in the analysis. Data extraction was performed meticulously by two authors, and the quality of the selected studies was assessed using the Critical Appraisal Skills Program (CASP) checklist. Results The findings revealed that certain Branched-chain amino acids (BCAAs) levels were lower in frail subjects compared to robust subjects, while levels of glutamate and glutamine were higher in frail individuals. Moreover, sphingomyelins and phosphatidylcholines (PC) displayed a decreasing trend as frailty advanced. Additionally, other metabolic derivatives, such as carnitine, exhibited significant associations with frailty. These metabolites were primarily interconnected through biochemical pathways related to the tricarboxylic acid and urea cycles. Notably, frailty was associated with a decrease in metabolic derivatives, including carnitine. Conclusion This study underscores the intricate relationship between essential metabolites, including amino acids and lipids, and their varying levels in frail individuals compared to their robust counterparts. It provides a comprehensive panel of metabolites, shedding light on their potential associations with frailty and expanding our understanding of this complex syndrome.
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Affiliation(s)
- Ahmadreza Shekarchian
- Metabolomics and Genomics Research Center, Endocrinology and Metabolism Molecular- Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Fatemeh Bandarian
- Diabetes Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Hadizadeh
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Zahra Amirsardari
- School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Yasaman Sharifi
- Department of Radiology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran university of medical sciences, Tehran, Iran
| | - Aryan Ayati
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehdi Varmaghani
- Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | | | - Farshad Sharifi
- Elderly Health Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Abdolkarim Haji Ghadery
- Department of Radiology, Advanced Diagnostic, and Interventional Radiology Research Center (ADIR), Tehran, Iran
| | - Akram Tayanloo
- Cell Therapy and Regenerative Medicine Research Center, Endocrinology and Metabolism Molecular Cellular Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
| | - Tahereh Yavari
- Department of Internal Medicine, Shariati Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Bagher Larijani
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran university of medical sciences, Tehran, Iran
| | - Moloud Payab
- Non-Communicable Diseases Research Center, Endocrinology and Metabolism Population Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
- EMRI (Endocrinology and Metabolism Research Institute), First Floor, No 10, Jalal-Al-Ahmad Street, North Kargar Avenue, Tehran, 14117-13137 Iran
| | - Mahbube Ebrahimpur
- Research Center for Advanced Technologies in Cardiovascular Medicine, Cardiovascular Diseases Research Institute, Tehran University of Medical Sciences, Tehran, Iran
- Department of Radiology, Advanced Diagnostic, and Interventional Radiology Research Center (ADIR), Tehran, Iran
- Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran
- EMRI (Endocrinology and Metabolism Research Institute), First Floor, No 10, Jalal-Al-Ahmad Street, North Kargar Avenue, Tehran, 14117-13137 Iran
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Long F, Zou S, Dong Y. Associations between life's essential 8 and sarcopenia in US adults: a cross-sectional analysis. Sci Rep 2024; 14:9071. [PMID: 38643195 PMCID: PMC11032333 DOI: 10.1038/s41598-024-59421-9] [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: 09/16/2023] [Accepted: 04/10/2024] [Indexed: 04/22/2024] Open
Abstract
Cardiovascular disease (CVD) is closely associated with sarcopenia. We aimed to examine the relationship between Life's Essential 8 (LE8) and the incidence of sarcopenia among adults in the United States. In this study, a cross-sectional analysis was conducted using data from the National Health and Nutrition Examination Survey from 2013 to 2018 and included 5999 adult participants. LE8 score was categorized into low (< 49), moderate (49-79), and high CVH (≥ 79) groups and consisted of health behavior score and health factor score based on American Heart Association definitions. Sarcopenia was defined according to The Foundation for the National Institutes of Health Sarcopenia Project. Multivariate logistic regressions, restricted cubic spline regressions, and subgroup analyses were used to assess the association between LE8 and sarcopenia. LE8 and its subscales score were negatively associated with the incidence of sarcopenia in US adults.
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Affiliation(s)
- Feng Long
- Department of Orthopedics, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Su Zou
- Department of Cardiology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China
| | - Youhai Dong
- Department of Orthopedics, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China.
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9
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Franczak E, Maurer A, Drummond VC, Kugler BA, Wells E, Wenger M, Peelor FF, Crosswhite A, McCoin CS, Koch LG, Britton SL, Miller BF, Thyfault JP. Divergence in aerobic capacity and energy expenditure influence metabolic tissue mitochondrial protein synthesis rates in aged rats. GeroScience 2024; 46:2207-2222. [PMID: 37880490 PMCID: PMC10828174 DOI: 10.1007/s11357-023-00985-1] [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: 09/12/2023] [Accepted: 10/14/2023] [Indexed: 10/27/2023] Open
Abstract
Age-associated declines in aerobic capacity promote the development of various metabolic diseases. In rats selectively bred for high/low intrinsic aerobic capacity, greater aerobic capacity reduces susceptibility to metabolic disease while increasing longevity. However, little remains known how intrinsic aerobic capacity protects against metabolic disease, particularly with aging. Here, we tested the effects of aging and intrinsic aerobic capacity on systemic energy expenditure, metabolic flexibility and mitochondrial protein synthesis rates using 24-month-old low-capacity (LCR) or high-capacity runner (HCR) rats. Rats were fed low-fat diet (LFD) or high-fat diet (HFD) for eight weeks, with energy expenditure (EE) and metabolic flexibility assessed utilizing indirect calorimetry during a 48 h fast/re-feeding metabolic challenge. Deuterium oxide (D2O) labeling was used to assess mitochondrial protein fraction synthesis rates (FSR) over a 7-day period. HCR rats possessed greater EE during the metabolic challenge. Interestingly, HFD induced changes in respiratory exchange ratio (RER) in male and female rats, while HCR female rat RER was largely unaffected by diet. In addition, analysis of protein FSR in skeletal muscle, brain, and liver mitochondria showed tissue-specific adaptations between HCR and LCR rats. While brain and liver protein FSR were altered by aerobic capacity and diet, these effects were less apparent in skeletal muscle. Overall, we provide evidence that greater aerobic capacity promotes elevated EE in an aged state, while also regulating metabolic flexibility in a sex-dependent manner. Modulation of mitochondrial protein FSR by aerobic capacity is tissue-specific with aging, likely due to differential energetic requirements by each tissue.
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Affiliation(s)
- Edziu Franczak
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas City Veterans Affairs Medical Center, Kansas City, MO, 64128, USA
| | - Adrianna Maurer
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
| | - Vivien Csikos Drummond
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
| | - Benjamin A Kugler
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | - Emily Wells
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
| | - Madi Wenger
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | | | - Abby Crosswhite
- Oklahoma Medical Research Foundation, Oklahoma City, OK, 73104, USA
| | - Colin S McCoin
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA
- Kansas City Veterans Affairs Medical Center, Kansas City, MO, 64128, USA
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | - Lauren G Koch
- Department of Physiology and Pharmacology, The University of Toledo College of Medicine and Life Sciences, Toledo, OH, 43606, USA
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Benjamin F Miller
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA
| | - John P Thyfault
- Department of Cell Biology and Physiology, Medical Center, The University of Kansas, Kansas City, KS, 66160, USA.
- Kansas City Veterans Affairs Medical Center, Kansas City, MO, 64128, USA.
- Kansas Center for Metabolism and Obesity Research, Kansas City, MO, 64128, USA.
- KU Diabetes Institute and Department of Internal Medicine-Division of Endocrinology and Metabolism, The University of Kansas Medical Center, 3901 Rainbow Boulevard, Hemenway Life Sciences Innovation Center, Mailstop 3043, Kansas City, KS, 66160, USA.
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10
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Moosavi D, Vuckovic I, Kunz HE, Lanza IR. Metabolomic response to acute resistance exercise in healthy older adults by 1H-NMR. PLoS One 2024; 19:e0301037. [PMID: 38547208 PMCID: PMC10977811 DOI: 10.1371/journal.pone.0301037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 03/03/2024] [Indexed: 04/02/2024] Open
Abstract
BACKGROUND The favorable health-promoting adaptations to exercise result from cumulative responses to individual bouts of physical activity. Older adults often exhibit anabolic resistance; a phenomenon whereby the anabolic responses to exercise and nutrition are attenuated in skeletal muscle. The mechanisms contributing to age-related anabolic resistance are emerging, but our understanding of how chronological age influences responsiveness to exercise is incomplete. The objective was to determine the effects of healthy aging on peripheral blood metabolomic response to a single bout of resistance exercise and whether any metabolites in circulation are predictive of anabolic response in skeletal muscle. METHODS Thirty young (20-35 years) and 49 older (65-85 years) men and women were studied in a cross-sectional manner. Participants completed a single bout of resistance exercise consisting of eight sets of 10 repetitions of unilateral knee extension at 70% of one-repetition maximum. Blood samples were collected before exercise, immediately post exercise, and 30-, 90-, and 180-minutes into recovery. Proton nuclear magnetic resonance spectroscopy was used to profile circulating metabolites at all timepoints. Serial muscle biopsies were collected for measuring muscle protein synthesis rates. RESULTS Our analysis revealed that one bout of resistance exercise elicits significant changes in 26 of 33 measured plasma metabolites, reflecting alterations in several biological processes. Furthermore, 12 metabolites demonstrated significant interactions between exercise and age, including organic acids, amino acids, ketones, and keto-acids, which exhibited distinct responses to exercise in young and older adults. Pre-exercise histidine and sarcosine were negatively associated with muscle protein synthesis, as was the pre/post-exercise fold change in plasma histidine. CONCLUSIONS This study demonstrates that while many exercise-responsive metabolites change similarly in young and older adults, several demonstrate age-dependent changes even in the absence of evidence of sarcopenia or frailty. TRIAL REGISTRATION Clinical trial registry: ClinicalTrials.gov NCT03350906.
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Affiliation(s)
- Darya Moosavi
- Department of Internal Medicine, Endocrine Research Unit, Division of Endocrinology, Mayo Clinic, Rochester, MN, United States of America
- Department of Biobehavioral Sciences, Teachers College, Columbia University, New York, NY, United States of America
| | - Ivan Vuckovic
- Department of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN, United States of America
| | - Hawley E. Kunz
- Department of Internal Medicine, Endocrine Research Unit, Division of Endocrinology, Mayo Clinic, Rochester, MN, United States of America
| | - Ian R. Lanza
- Department of Internal Medicine, Endocrine Research Unit, Division of Endocrinology, Mayo Clinic, Rochester, MN, United States of America
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11
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Rathor L, Curry S, Park Y, McElroy T, Robles B, Sheng Y, Chen WW, Min K, Xiao R, Lee MH, Han SM. Mitochondrial stress in GABAergic neurons non-cell autonomously regulates organismal health and aging. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.20.585932. [PMID: 38585797 PMCID: PMC10996468 DOI: 10.1101/2024.03.20.585932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Mitochondrial stress within the nervous system can trigger non-cell autonomous responses in peripheral tissues. However, the specific neurons involved and their impact on organismal aging and health have remained incompletely understood. Here, we demonstrate that mitochondrial stress in γ-aminobutyric acid-producing (GABAergic) neurons in Caenorhabditis elegans ( C. elegans ) is sufficient to significantly alter organismal lifespan, stress tolerance, and reproductive capabilities. This mitochondrial stress also leads to significant changes in mitochondrial mass, energy production, and levels of reactive oxygen species (ROS). DAF-16/FoxO activity is enhanced by GABAergic neuronal mitochondrial stress and mediates the induction of these non-cell-autonomous effects. Moreover, our findings indicate that GABA signaling operates within the same pathway as mitochondrial stress in GABAergic neurons, resulting in non-cell-autonomous alterations in organismal stress tolerance and longevity. In summary, these data suggest the crucial role of GABAergic neurons in detecting mitochondrial stress and orchestrating non-cell-autonomous changes throughout the organism.
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12
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Baghdassarian HM, Lewis NE. Resource allocation in mammalian systems. Biotechnol Adv 2024; 71:108305. [PMID: 38215956 PMCID: PMC11182366 DOI: 10.1016/j.biotechadv.2023.108305] [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: 08/03/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 01/14/2024]
Abstract
Cells execute biological functions to support phenotypes such as growth, migration, and secretion. Complementarily, each function of a cell has resource costs that constrain phenotype. Resource allocation by a cell allows it to manage these costs and optimize their phenotypes. In fact, the management of resource constraints (e.g., nutrient availability, bioenergetic capacity, and macromolecular machinery production) shape activity and ultimately impact phenotype. In mammalian systems, quantification of resource allocation provides important insights into higher-order multicellular functions; it shapes intercellular interactions and relays environmental cues for tissues to coordinate individual cells to overcome resource constraints and achieve population-level behavior. Furthermore, these constraints, objectives, and phenotypes are context-dependent, with cells adapting their behavior according to their microenvironment, resulting in distinct steady-states. This review will highlight the biological insights gained from probing resource allocation in mammalian cells and tissues.
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Affiliation(s)
- Hratch M Baghdassarian
- Bioinformatics and Systems Biology Graduate Program, University of California, San Diego, La Jolla, CA 92093, USA; Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA
| | - Nathan E Lewis
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA; Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, USA.
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13
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Gonzalez-Armenta JL, Bergstrom J, Lee J, Furdui CM, Nicklas BJ, Molina AJA. Serum factors mediate changes in mitochondrial bioenergetics associated with diet and exercise interventions. GeroScience 2024; 46:349-365. [PMID: 37368157 PMCID: PMC10828137 DOI: 10.1007/s11357-023-00855-w] [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: 04/27/2023] [Accepted: 06/15/2023] [Indexed: 06/28/2023] Open
Abstract
Mitochondrial improvements resulting from behavioral interventions, such as diet and exercise, are systemic and apparent across multiple tissues. Here, we test the hypothesis that factors present in serum, and therefore circulating throughout the body, can mediate changes in mitochondrial function in response to intervention. To investigate this, we used stored serum from a clinical trial comparing resistance training (RT) and RT plus caloric restriction (RT + CR) to examine effects of blood borne circulating factors on myoblasts in vitro. We report that exposure to dilute serum is sufficient to mediate bioenergetic benefits of these interventions. Additionally, serum-mediated bioenergetic changes can differentiate between interventions, recapitulate sex differences in bioenergetic responses, and is linked to improvements in physical function and inflammation. Using metabolomics, we identified circulating factors associated with changes in mitochondrial bioenergetics and the effects of interventions. This study provides new evidence that circulating factors play a role in the beneficial effects of interventions that improve healthspan among older adults. Understanding the factors that drive improvements in mitochondrial function is a key step towards predicting intervention outcomes and developing strategies to countermand systemic age-related bioenergetic decline.
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Affiliation(s)
- Jenny L Gonzalez-Armenta
- Section On Gerontology and Geriatrics, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Jaclyn Bergstrom
- Division of Geriatrics, Gerontology, and Palliative Care, Department of Medicine, University of California San Diego School of Medicine, 9500 Gilman Drive, MC 0665, La Jolla, CA, 92093-0665, USA
| | - Jingyun Lee
- Proteomics and Metabolomics Shared Resource, Comprehensive Cancer Center, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Cristina M Furdui
- Section On Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Barbara J Nicklas
- Section On Gerontology and Geriatrics, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Anthony J A Molina
- Division of Geriatrics, Gerontology, and Palliative Care, Department of Medicine, University of California San Diego School of Medicine, 9500 Gilman Drive, MC 0665, La Jolla, CA, 92093-0665, USA.
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14
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Chen S, Xu X, Gong H, Chen R, Guan L, Yan X, Zhou L, Yang Y, Wang J, Zhou J, Zou C, Huang P. Global epidemiological features and impact of osteosarcopenia: A comprehensive meta-analysis and systematic review. J Cachexia Sarcopenia Muscle 2024; 15:8-20. [PMID: 38086772 PMCID: PMC10834350 DOI: 10.1002/jcsm.13392] [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: 07/05/2023] [Revised: 10/04/2023] [Accepted: 11/02/2023] [Indexed: 02/03/2024] Open
Abstract
Osteosarcopenia is defined as the concurrent occurrence of osteopenia/osteoporosis and sarcopenia. The aim of the current study was to perform a systematic review with meta-analysis to determine the global prevalence, risk factors and clinical outcomes of osteosarcopenia. This review was registered in PROSPERO (CRD42022351229). PubMed, Cochrane, Medline and Embase were searched from inception to February 2023 to retrieve eligible observational population-based studies. Pooled osteosarcopenia prevalence was calculated with 95% confidence interval (CI), and subgroup analyses were performed. The risk factor of osteosarcopenia and its association with clinical outcomes were expressed as odds ratio (OR) and hazard ratio (HR), respectively. Heterogeneity was estimated using the I2 test. Study quality was assessed using validated instruments matched to study designs. The search identified 55 158 studies, and 66 studies (64 404 participants, mean age from 46.6 to 93 years) were analysed in the final analysis, including 48 cross-sectional studies, 17 cohort studies and 1 case-control study. Overall, the pooled prevalence of osteosarcopenia was 18.5% (95% CI: 16.7-20.3, I2 = 98.7%), including 15.3% (95% CI: 13.2-17.4, I2 = 97.6%) in men and 19.4% (95% CI: 16.9-21.9, I2 = 98.5%) in women. The prevalence of osteosarcopenia diagnosed using sarcopenia plus osteopenia/osteoporosis was 20.7% (95% CI: 17.1-24.4, I2 = 98.55%), and the prevalence of using sarcopenia plus osteoporosis was 16.1% (95% CI: 13.3-18.9, I2 = 98.0%). The global osteosarcopenia prevalence varied in different regions with 22.9% in Oceania, 21.6% in Asia, 20.8% in South America, 15.7% in North America and 10.9% in Europe. A statistically significant difference was found in the subgroups of the study population between the hospital (24.7%) and community (12.9%) (P = 0.001). Frailty (OR = 4.72, 95% CI: 2.71-8.23, I2 = 61.1%), malnutrition (OR = 2.35, 95% CI: 1.62-3.40, I2 = 50.0%), female sex (OR = 5.07, 95% CI: 2.96-8.69, I2 = 73.0%) and higher age (OR = 1.10, 95% CI: 1.06-1.15, I2 ==86.0%) were significantly associated with a higher risk for osteosarcopenia. Meta-analysis of cohort studies showed that osteosarcopenia significantly increased the risk of fall (HR = 1.54, 95% CI: 1.20-1.97; I2 = 1.0%, three studies), fracture (HR = 2.13, 95% CI: 1.61-2.81; I2 = 67.8%, seven studies) and mortality (HR = 1.75, 95% CI: 1.34-2.28; I2 = 0.0%, five studies). Despite the heterogeneity arising from varied definitions and criteria, our findings highlight a significant global prevalence of osteosarcopenia and its negative impact on clinical health. Standardizing diagnostic criteria for osteosarcopenia would be advantageous in the future, and early detection and management should be emphasized in this patient population.
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Affiliation(s)
- Shanping Chen
- Department of Gerontology and Geriatric, Chengdu Fifth People's Hospital, Chengdu, China
- The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Geriatric Diseases Institute of Chengdu, Chengdu, China
| | - Xiao Xu
- Affiliated Hospital of Jinggangshan University, Center for Clinical Medicine Research of Jinggangshan University, Ji'an, China
- Department of Medicine, Jinggangshan University, Ji'an, China
- Online Collaborative Research Center for Evidence-Based Medicine Ministry of Education, Jinggangshan University Branch, Ji'an, China
| | - Huping Gong
- College of Nursing, Gannan Medical University, Ganzhou, China
| | - Ruzhao Chen
- Affiliated Hospital of Jinggangshan University, Center for Clinical Medicine Research of Jinggangshan University, Ji'an, China
- Department of Medicine, Jinggangshan University, Ji'an, China
- Online Collaborative Research Center for Evidence-Based Medicine Ministry of Education, Jinggangshan University Branch, Ji'an, China
| | - Lijuan Guan
- Department of Gerontology and Geriatric, Chengdu Fifth People's Hospital, Chengdu, China
- The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Geriatric Diseases Institute of Chengdu, Chengdu, China
| | - Xuedan Yan
- Department of Gerontology and Geriatric, Chengdu Fifth People's Hospital, Chengdu, China
- The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Geriatric Diseases Institute of Chengdu, Chengdu, China
| | - Lihua Zhou
- Department of Gerontology and Geriatric, Chengdu Fifth People's Hospital, Chengdu, China
- The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Geriatric Diseases Institute of Chengdu, Chengdu, China
| | - Yongxue Yang
- Department of Gerontology and Geriatric, Chengdu Fifth People's Hospital, Chengdu, China
- The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Geriatric Diseases Institute of Chengdu, Chengdu, China
| | - Jiang Wang
- Affiliated Hospital of Jinggangshan University, Center for Clinical Medicine Research of Jinggangshan University, Ji'an, China
- Department of Medicine, Jinggangshan University, Ji'an, China
- Online Collaborative Research Center for Evidence-Based Medicine Ministry of Education, Jinggangshan University Branch, Ji'an, China
| | - Jianghua Zhou
- Department of Cardiology, The First Affiliated Hospital, Wenzhou Medical University, Wenzhou, China
| | - Chuan Zou
- The Second Clinical Medical College, Affiliated Fifth People's Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
- Geriatric Diseases Institute of Chengdu, Chengdu, China
- Department of General Practice, Chengdu Fifth People's Hospital, Chengdu, China
| | - Pan Huang
- College of Nursing, Wenzhou Medical University, Wenzhou, China
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15
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O'Reilly CL, Bodine SC, Miller BF. Current limitations and future opportunities of tracer studies of muscle ageing. J Physiol 2023:10.1113/JP285616. [PMID: 38051758 PMCID: PMC11150331 DOI: 10.1113/jp285616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 11/22/2023] [Indexed: 12/07/2023] Open
Affiliation(s)
- Colleen L O'Reilly
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
| | - Sue C Bodine
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Oklahoma City Veterans Association, Oklahoma City, OK, USA
| | - Benjamin F Miller
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
- Oklahoma City Veterans Association, Oklahoma City, OK, USA
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16
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Pataky MW, Dasari S, Michie KL, Sevits KJ, Kumar AA, Klaus KA, Heppelmann CJ, Robinson MM, Carter RE, Lanza IR, Nair KS. Impact of biological sex and sex hormones on molecular signatures of skeletal muscle at rest and in response to distinct exercise training modes. Cell Metab 2023; 35:1996-2010.e6. [PMID: 37939659 PMCID: PMC10659143 DOI: 10.1016/j.cmet.2023.10.010] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 05/09/2023] [Accepted: 10/13/2023] [Indexed: 11/10/2023]
Abstract
Substantial divergence in cardio-metabolic risk, muscle size, and performance exists between men and women. Considering the pivotal role of skeletal muscle in human physiology, we investigated and found, based on RNA sequencing (RNA-seq), that differences in the muscle transcriptome between men and women are largely related to testosterone and estradiol and much less related to genes located on the Y chromosome. We demonstrate inherent unique, sex-dependent differences in muscle transcriptional responses to aerobic, resistance, and combined exercise training in young and older cohorts. The hormonal changes with age likely explain age-related differential expression of transcripts. Furthermore, in primary human myotubes we demonstrate the profound but distinct effects of testosterone and estradiol on amino acid incorporation to multiple individual proteins with specific functions. These results clearly highlight the potential of designing exercise programs tailored specifically to men and women and have implications for people who change gender by altering their hormone profile.
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Affiliation(s)
- Mark W Pataky
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, MN, USA
| | - Surendra Dasari
- Department of Quantitative Health Sciences, Mayo Clinic, Rochester, MN, USA
| | - Kelly L Michie
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, MN, USA
| | - Kyle J Sevits
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, MN, USA
| | - A Aneesh Kumar
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, MN, USA
| | - Katherine A Klaus
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, MN, USA
| | | | - Matthew M Robinson
- School of Biological and Population Health Sciences, College of Public Health and Human Sciences, Oregon State University, Corvallis, OR, USA
| | - Rickey E Carter
- Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN, USA
| | - Ian R Lanza
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, MN, USA
| | - K Sreekumaran Nair
- Division of Endocrinology and Metabolism, Mayo Clinic, Rochester, MN, USA.
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17
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Coen PM, Huo Z, Tranah GJ, Barnes HN, Cawthon PM, Hepple RT, Toledo FGS, Evans DS, Fernández OS, Cuervo AM, Kritchevsky SB, Newman AB, Cummings SR, Esser KA. Autophagy gene expression in skeletal muscle of older individuals is associated with physical performance, muscle volume and mitochondrial function in the Study of Muscle, Mobility and Aging (SOMMA). MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.11.04.23297979. [PMID: 37961308 PMCID: PMC10635272 DOI: 10.1101/2023.11.04.23297979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Autophagy is an essential component of proteostasis and a key pathway in aging. Identifying associations between autophagy gene expression patterns in skeletal muscle and physical performance outcomes would further our knowledge of mechanisms related with proteostasis and healthy aging. Muscle biopsies were obtained from participants in the Study of Muscle, Mobility and Aging (SOMMA). For 575 participants, RNA was sequenced and expression of 281 genes related to autophagy regulation, mitophagy and mTOR/upstream pathways were determined. Associations between gene expression and outcomes including mitochondrial respiration in muscle fiber bundles (MAX OXPHOS), physical performance (VO2 peak, 400m walking speed, and leg power), and thigh muscle volume were determined using negative binomial regression models. For autophagy, key transcriptional regulators including TFE3 and NFKB-related genes (RELA, RELB, NFKB1) were negatively associated with outcomes. On the contrary, regulators of oxidative metabolism that also promote overall autophagy, mitophagy and pexophagy (PPARGC1A, PPARA, EPAS1) were positively associated with multiple outcomes. In line with this, several mitophagy, fusion and fission related genes (NIPSNAP2, DNM1L, OPA1) were also positively associated with outcomes. For mTOR pathway and related genes, expression of WDR59 and WDR24, both subunits of GATOR2 complex (an indirect inhibitor of mTORC1) and PRKAG3, which is a regulatory subunit of AMPK, were negatively correlated with multiple outcomes. Our study identifies autophagy and selective autophagy such as mitophagy gene expression patterns in human skeletal muscle related to physical performance, muscle volume and mitochondrial function in older persons which may lead to target identification to preserve mobility and independence.
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Affiliation(s)
- Paul M Coen
- Translational Research Institute, Advent Health, Orlando, Florida, USA
| | - Zhiguang Huo
- Department of Biostatistics, College of Public Health & Health Professions, College of Medicine University of Florida, Gainesville, Florida, USA
| | - Gregory J Tranah
- California Pacific Medical Center Research Institute, San Francisco, California, USA
| | - Haley N Barnes
- California Pacific Medical Center Research Institute, San Francisco, California, USA
| | - Peggy M Cawthon
- California Pacific Medical Center Research Institute, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| | - Russell T Hepple
- Department of Physical Therapy, University of Florida, Gainesville, Florida, USA
| | - Frederico G S Toledo
- Department of Medicine, Division of Endocrinology and Metabolism, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Daniel S Evans
- California Pacific Medical Center Research Institute, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| | - Olaya Santiago Fernández
- Department of Developmental & Molecular Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Ana Maria Cuervo
- Department of Developmental & Molecular Biology, Albert Einstein College of Medicine, New York, New York, USA
| | - Steven B Kritchevsky
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Anne B Newman
- Department of Epidemiology, School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Steven R Cummings
- California Pacific Medical Center Research Institute, San Francisco, California, USA
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, California, USA
| | - Karyn A Esser
- Department of Physiology and Ageing, College of Medicine, University of Florida, Gainesville, FL, USA
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18
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Tezze C, Sandri M, Tessari P. Anabolic Resistance in the Pathogenesis of Sarcopenia in the Elderly: Role of Nutrition and Exercise in Young and Old People. Nutrients 2023; 15:4073. [PMID: 37764858 PMCID: PMC10535169 DOI: 10.3390/nu15184073] [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: 08/02/2023] [Revised: 09/01/2023] [Accepted: 09/03/2023] [Indexed: 09/29/2023] Open
Abstract
The development of sarcopenia in the elderly is associated with many potential factors and/or processes that impair the renovation and maintenance of skeletal muscle mass and strength as ageing progresses. Among them, a defect by skeletal muscle to respond to anabolic stimuli is to be considered. Common anabolic stimuli/signals in skeletal muscle are hormones (insulin, growth hormones, IGF-1, androgens, and β-agonists such epinephrine), substrates (amino acids such as protein precursors on top, but also glucose and fat, as source of energy), metabolites (such as β-agonists and HMB), various biochemical/intracellular mediators), physical exercise, neurogenic and immune-modulating factors, etc. Each of them may exhibit a reduced effect upon skeletal muscle in ageing. In this article, we overview the role of anabolic signals on muscle metabolism, as well as currently available evidence of resistance, at the skeletal muscle level, to anabolic factors, from both in vitro and in vivo studies. Some indications on how to augment the effects of anabolic signals on skeletal muscle are provided.
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Affiliation(s)
- Caterina Tezze
- Department of Biomedical Sciences, University of Padova, via Ugo Bassi 58/b, 35121 Padova, Italy;
- Veneto Institute of Molecular Medicine, via Orus 2, 35129 Padova, Italy
| | - Marco Sandri
- Department of Biomedical Sciences, University of Padova, via Ugo Bassi 58/b, 35121 Padova, Italy;
- Veneto Institute of Molecular Medicine, via Orus 2, 35129 Padova, Italy
- Department of Medicine, McGill University, Montreal, QC H4A 3J1, Canada
| | - Paolo Tessari
- Department of Medicine, University of Padova, via Giustiniani 2, 35128 Padova, Italy
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19
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de Smalen LM, Börsch A, Leuchtmann AB, Gill JF, Ritz D, Zavolan M, Handschin C. Impaired age-associated mitochondrial translation is mitigated by exercise and PGC-1α. Proc Natl Acad Sci U S A 2023; 120:e2302360120. [PMID: 37639610 PMCID: PMC10483666 DOI: 10.1073/pnas.2302360120] [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: 02/10/2023] [Accepted: 07/24/2023] [Indexed: 08/31/2023] Open
Abstract
Sarcopenia, the age-related loss of skeletal muscle mass and function, can dramatically impinge on quality of life and mortality. While mitochondrial dysfunction and imbalanced proteostasis are recognized as hallmarks of sarcopenia, the regulatory and functional link between these processes is underappreciated and unresolved. We therefore investigated how mitochondrial proteostasis, a crucial process that coordinates the expression of nuclear- and mitochondrial-encoded mitochondrial proteins with supercomplex formation and respiratory activity, is affected in skeletal muscle aging. Intriguingly, a robust mitochondrial translation impairment was observed in sarcopenic muscle, which is regulated by the peroxisome proliferator-activated receptor γ coactivator 1 α (PGC-1α) with the estrogen-related receptor α (ERRα). Exercise, a potent inducer of PGC-1α activity, rectifies age-related reduction in mitochondrial translation, in conjunction with quality control pathways. These results highlight the importance of mitochondrial proteostasis in muscle aging, and elucidate regulatory interactions that underlie the powerful benefits of physical activity in this context.
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Affiliation(s)
| | | | | | | | - Danilo Ritz
- Biozentrum, University of Basel, BaselCH-4056, Switzerland
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20
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Kim HS, Parker DJ, Hardiman MM, Munkácsy E, Jiang N, Rogers AN, Bai Y, Brent C, Mobley JA, Austad SN, Pickering AM. Early-adulthood spike in protein translation drives aging via juvenile hormone/germline signaling. Nat Commun 2023; 14:5021. [PMID: 37596266 PMCID: PMC10439225 DOI: 10.1038/s41467-023-40618-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 08/01/2023] [Indexed: 08/20/2023] Open
Abstract
Protein translation (PT) declines with age in invertebrates, rodents, and humans. It has been assumed that elevated PT at young ages is beneficial to health and PT ends up dropping as a passive byproduct of aging. In Drosophila, we show that a transient elevation in PT during early-adulthood exerts long-lasting negative impacts on aging trajectories and proteostasis in later-life. Blocking the early-life PT elevation robustly improves life-/health-span and prevents age-related protein aggregation, whereas transiently inducing an early-life PT surge in long-lived fly strains abolishes their longevity/proteostasis benefits. The early-life PT elevation triggers proteostatic dysfunction, silences stress responses, and drives age-related functional decline via juvenile hormone-lipid transfer protein axis and germline signaling. Our findings suggest that PT is adaptively suppressed after early-adulthood, alleviating later-life proteostatic burden, slowing down age-related functional decline, and improving lifespan. Our work provides a theoretical framework for understanding how lifetime PT dynamics shape future aging trajectories.
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Affiliation(s)
- Harper S Kim
- Center for Neurodegeneration and Experimental Therapeutics, Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
- Medical Scientist Training Program, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
- Barshop Institute for Longevity and Aging Studies, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Medical Scientist Training Program, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Danitra J Parker
- Center for Neurodegeneration and Experimental Therapeutics, Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
- Department of Integrative Biology and Pharmacology, McGovern Medical School at UTHealth, Houston, TX, 77030, USA
| | - Madison M Hardiman
- Center for Neurodegeneration and Experimental Therapeutics, Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Erin Munkácsy
- Barshop Institute for Longevity and Aging Studies, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Nisi Jiang
- Barshop Institute for Longevity and Aging Studies, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Aric N Rogers
- MDI Biological Laboratory, Bar Harbor, ME, 04672, USA
| | - Yidong Bai
- Barshop Institute for Longevity and Aging Studies, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
- Department of Cell Systems and Anatomy, University of Texas Health San Antonio, San Antonio, TX, 78229, USA
| | - Colin Brent
- USDA-ARS Arid Land Agricultural Research Center, Maricopa, AZ, 85138, USA
| | - James A Mobley
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham, Birmingham, AL, 35249, USA
| | - Steven N Austad
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
- Nathan Shock Center, University of Alabama at Birmingham, Birmingham, AL, 35294, USA
| | - Andrew M Pickering
- Center for Neurodegeneration and Experimental Therapeutics, Department of Neurology, University of Alabama at Birmingham, Birmingham, AL, 35294, USA.
- Barshop Institute for Longevity and Aging Studies, University of Texas Health San Antonio, San Antonio, TX, 78229, USA.
- Department of Integrative Biology and Pharmacology, McGovern Medical School at UTHealth, Houston, TX, 77030, USA.
- Department of Molecular Medicine, University of Texas Health San Antonio, San Antonio, TX, 78229, USA.
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21
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Li X, He J, Sun Q. Sleep Duration and Sarcopenia: An Updated Systematic Review and Meta-Analysis. J Am Med Dir Assoc 2023; 24:1193-1206.e5. [PMID: 37295459 DOI: 10.1016/j.jamda.2023.04.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 04/27/2023] [Accepted: 04/28/2023] [Indexed: 06/12/2023]
Abstract
OBJECTIVES In adults, short and long sleep duration has been associated with sarcopenia risk. Studies have shown that various factors, including biological and psychological factors, could be the underlying cause of the association between aberrant sleep duration and sarcopenia risk. In this study, we have qualitatively and quantitatively summarized previously published studies on sleep duration to assess the relationship between sleep duration and sarcopenia risk in adults. This would aid in enhancing our understanding of recent advancements in this field and the association between sleep duration and sarcopenia risk. DESIGN Systematic review and meta-analysis. SETTING AND PARTICIPANTS In this review, we included studies evaluating the association between the duration of sleep and sarcopenia in adults in observational studies. METHODS Five electronic databases (PubMed, EMBASE, Cochrane Library, China National Knowledge Infrastructure, and Web of Science) were searched to April 20, 2023, to identify studies related to sarcopenia and sleep duration. Next, we calculated the odds ratios (ORs) for sarcopenia prevalence based on the adjusted data from individual studies. Statistical analyses were performed using Stata 11.0. RESULTS Sarcopenia prevalence was high (18%) in adults with long sleep duration. Our results showed a significant association between short duration of sleep and high sarcopenia prevalence in older adults (OR 1.2, 95% CI 1.02-1.41, I2 = 56.6%). Furthermore, a significant association was observed between all participants with long-duration sleep and high sarcopenia prevalence (OR 1.53, 95% CI 1.34-1.75, I2 = 56.8%). We also observed significant heterogeneity in the adjusted ORs. CONCLUSIONS AND IMPLICATIONS There was a correlation between sarcopenia and short or long sleep duration, especially in older adults. In adults with a long duration of sleep, sarcopenia prevalence was relatively high.
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Affiliation(s)
- Xiaoyan Li
- School of Nursing, Zhejiang Chinese Medical University, Hangzhou, China
| | - Jie He
- Department of Pulmonary and Critical Care Medicine, The First Affiliated Hospital of Chengdu Medical College, Chengdu, China
| | - Qiuhua Sun
- School of Nursing, Zhejiang Chinese Medical University, Hangzhou, China.
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22
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Vijay Kumar MJ, Morales R, Tsvetkov AS. G-quadruplexes and associated proteins in aging and Alzheimer's disease. FRONTIERS IN AGING 2023; 4:1164057. [PMID: 37323535 PMCID: PMC10267416 DOI: 10.3389/fragi.2023.1164057] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Accepted: 05/17/2023] [Indexed: 06/17/2023]
Abstract
Aging is a prominent risk factor for many neurodegenerative disorders, such as Alzheimer's disease (AD). Alzheimer's disease is characterized by progressive cognitive decline, memory loss, and neuropsychiatric and behavioral symptoms, accounting for most of the reported dementia cases. This disease is now becoming a major challenge and burden on modern society, especially with the aging population. Over the last few decades, a significant understanding of the pathophysiology of AD has been gained by studying amyloid deposition, hyperphosphorylated tau, synaptic dysfunction, oxidative stress, calcium dysregulation, and neuroinflammation. This review focuses on the role of non-canonical secondary structures of DNA/RNA G-quadruplexes (G4s, G4-DNA, and G4-RNA), G4-binding proteins (G4BPs), and helicases, and their roles in aging and AD. Being critically important for cellular function, G4s are involved in the regulation of DNA and RNA processes, such as replication, transcription, translation, RNA localization, and degradation. Recent studies have also highlighted G4-DNA's roles in inducing DNA double-strand breaks that cause genomic instability and G4-RNA's participation in regulating stress granule formation. This review emphasizes the significance of G4s in aging processes and how their homeostatic imbalance may contribute to the pathophysiology of AD.
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Affiliation(s)
- M. J. Vijay Kumar
- The Department of Neurology, The University of Texas McGovern Medical School at Houston, Houston, TX, United States
| | - Rodrigo Morales
- The Department of Neurology, The University of Texas McGovern Medical School at Houston, Houston, TX, United States
- Centro Integrativo de Biologia y Quimica Aplicada (CIBQA), Universidad Bernardo O’Higgins, Santiago, Chile
| | - Andrey S. Tsvetkov
- The Department of Neurology, The University of Texas McGovern Medical School at Houston, Houston, TX, United States
- The University of Texas Graduate School of Biomedical Sciences, Houston, TX, United States
- UTHealth Consortium on Aging, The University of Texas McGovern Medical School, Houston, TX, United States
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23
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Jung UJ. Sarcopenic Obesity: Involvement of Oxidative Stress and Beneficial Role of Antioxidant Flavonoids. Antioxidants (Basel) 2023; 12:antiox12051063. [PMID: 37237929 DOI: 10.3390/antiox12051063] [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: 03/27/2023] [Revised: 04/25/2023] [Accepted: 05/05/2023] [Indexed: 05/28/2023] Open
Abstract
Sarcopenic obesity, which refers to concurrent sarcopenia and obesity, is characterized by decreased muscle mass, strength, and performance along with abnormally excessive fat mass. Sarcopenic obesity has received considerable attention as a major health threat in older people. However, it has recently become a health problem in the general population. Sarcopenic obesity is a major risk factor for metabolic syndrome and other complications such as osteoarthritis, osteoporosis, liver disease, lung disease, renal disease, mental disease and functional disability. The pathogenesis of sarcopenic obesity is multifactorial and complicated, and it is caused by insulin resistance, inflammation, hormonal changes, decreased physical activity, poor diet and aging. Oxidative stress is a core mechanism underlying sarcopenic obesity. Some evidence indicates a protective role of antioxidant flavonoids in sarcopenic obesity, although the precise mechanisms remain unclear. This review summarizes the general characteristics and pathophysiology of sarcopenic obesity and focuses on the role of oxidative stress in sarcopenic obesity. The potential benefits of flavonoids in sarcopenic obesity have also been discussed.
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Affiliation(s)
- Un Ju Jung
- Department of Food Science and Nutrition, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea
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24
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Guan SP, Kumar SN, Fann DY, Kennedy BK. A mechanistic perspective on the health promoting effects of alcohol - A focus on epigenetics modification. Alcohol 2023; 107:91-96. [PMID: 35987314 DOI: 10.1016/j.alcohol.2022.07.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 07/25/2022] [Accepted: 07/27/2022] [Indexed: 01/23/2023]
Abstract
While the detrimental effects of binge drinking are well recognized, low-to-moderate alcohol consumption may be beneficial to health, although the underlying mechanism(s) remains elusive. In this opinion article, we will examine the effects of low dose alcohol consumption from the perspective of epigenetic modulation. Biochemically, alcohol is metabolized into acetate and subsequently to acetyl-coA, which can modulate histone acetylation levels. While elevated levels of acetyl-CoA are detrimental for longevity, we argue that diminished acetyl-CoA also negatively affects fatty acid biosynthesis and histone acetylation, which play a critical role in gene expression and, ultimately, health span. Since mitochondrial function and glucose metabolism, which provide the main source of nucleocytoplasmic acetyl-CoA, are compromised with age, alcohol-derived acetate could be an alternative source of acetyl-CoA to compensate. Hence, the health benefits of low ethanol consumption may be more pronounced after midlife, since mitochondrial function and/or glucose metabolism are diminished in this phase of the life course. Indeed, various clinical alcohol consumption studies concur with this notion, and have shown that a low dose of regular alcohol intake after midlife brings about various health and survival benefits. The requirement for regular alcohol intake may also reflect the transient nature of ethanol-induced histone acetylation. Conversely, ethanol may also stimulate carcinogenesis by inhibiting DNA methylation, as it was shown to reduce various pathways leading to DNA and histone methylation. However, unlike acetylation, where ethanol directly increases the substrate for acetylation, this effect was only observed in the high alcohol exposure cohort. While alcohol-derived acetate may be beneficial for health after midlife, various detrimental effects of alcohol consumption remain, and hence, we do not advocate excessive drinking to increase acetate. This opinion article establishes a possible role of ethanol-derived acetate in achieving homeostasis and sustaining an organism's health span.
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Affiliation(s)
- Shou Ping Guan
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Centre for Healthy Longevity, National University Health System, Singapore
| | - Shermila N Kumar
- Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Centre for Healthy Longevity, National University Health System, Singapore
| | - David Y Fann
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Centre for Healthy Longevity, National University Health System, Singapore
| | - Brian K Kennedy
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Centre for Healthy Longevity, National University Health System, Singapore; Singapore Institute of Clinical Sciences, Agency for Science, Technology and Research (A∗STAR), Singapore, Singapore.
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25
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Farsijani S, Cauley JA, Peddada SD, Langsetmo L, Shikany JM, Orwoll ES, Ensrud KE, Cawthon PM, Newman AB. Relation Between Dietary Protein Intake and Gut Microbiome Composition in Community-Dwelling Older Men: Findings from the Osteoporotic Fractures in Men Study (MrOS). J Nutr 2023; 152:2877-2887. [PMID: 36205552 PMCID: PMC9839986 DOI: 10.1093/jn/nxac231] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 07/12/2022] [Accepted: 09/29/2022] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Little is known about the association of specific nutrients, especially proteins, on age-related gut dysbiosis. OBJECTIVES To determine the associations between the quantity and sources (vegetable and animal) of dietary protein intake and gut microbiome composition in community-dwelling older men. METHODS We performed a cross-sectional analysis on 775 older men from the Osteoporotic Fractures in Men Study (MrOS) (age 84.2 ± 4.0 y) with available dietary information and stool samples at visit 4 (2014-2016). Protein intake was estimated from a brief FFQ and adjusted to total energy intake. The gut microbiome composition was determined by 16S (v4) sequencing (processed by DADA2 and SILVA). A total of 11,534 amplicon sequence variants (ASVs) were identified and assigned to 21 phyla with dominance of Firmicutes (45%) and Bacteroidetes (43%). We performed α-diversity, β-diversity, and taxa abundance (by Analysis of Compositions of Microbiomes with Bias Correction [ANCOM-BC]) to determine the associations between protein intake and the gut microbiome. RESULTS Median protein intake was 0.7 g/(kg body weight · d). Participants with higher energy-adjusted protein intakes had higher Shannon and Chao1 α-diversity indices (P < 0.05). For β-diversity analysis, participants with higher protein intakes had a different center in weighted and unweighted UniFrac Principal Co-ordinates Analysis (PCoA) compared with those with lower intake (P < 0.05), adjusted for age, race, education, clinical center, batch number, fiber and energy intake, weight, height, and medications. Similarly, higher protein consumptions from either animal or vegetable sources were associated with higher gut microbiome diversity. Several genus-level ASVs, including Christensenellaceae, Veillonella, Haemophilus, and Klebsiella were more abundant in participants with higher protein intakes, whereas Clostridiales bacterium DTU089 and Desulfovibrio were more abundant in participants with lower protein intake (Bonferroni corrected P < 0.05). CONCLUSIONS We observed significant associations between protein intake and gut microbiome diversity in community-living older men. Further studies are needed to elucidate the mediation role of the gut microbiome on the relation between protein intake and health outcomes in older adults.
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Affiliation(s)
- Samaneh Farsijani
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
- Claude D. Pepper Older Americans Independence Center (OAICs), University of Pittsburgh, Pittsburgh, PA, USA
- Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jane A Cauley
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
- Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Shyamal D Peddada
- Biostatistics and Bioinformatics Branch, Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA
| | - Lisa Langsetmo
- Center for Care Delivery and Outcomes Research, VA Health Care System, Minneapolis, MN, USA
| | - James M Shikany
- Division of Preventive Medicine, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Eric S Orwoll
- Division of Endocrinology, Diabetes and Clinical Nutrition, School of Medicine, Oregon Health & Science University, Portland, OR, USA
| | - Kristine E Ensrud
- Center for Care Delivery and Outcomes Research, Minneapolis VA Health Care System, Minneapolis, MN, USA
- Department of Medicine and Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA
| | - Peggy M Cawthon
- California Pacific Medical Center Research Institute, University of California San Francisco, San Francisco, CA, USA
| | - Anne B Newman
- Department of Epidemiology, University of Pittsburgh, Pittsburgh, PA, USA
- Claude D. Pepper Older Americans Independence Center (OAICs), University of Pittsburgh, Pittsburgh, PA, USA
- Center for Aging and Population Health, University of Pittsburgh, Pittsburgh, PA, USA
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26
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Kim HS, Pickering AM. Protein translation paradox: Implications in translational regulation of aging. Front Cell Dev Biol 2023; 11:1129281. [PMID: 36711035 PMCID: PMC9880214 DOI: 10.3389/fcell.2023.1129281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 01/02/2023] [Indexed: 01/15/2023] Open
Abstract
Protein translation is an essential cellular process playing key roles in growth and development. Protein translation declines over the course of age in multiple animal species, including nematodes, fruit flies, mice, rats, and even humans. In all these species, protein translation transiently peaks in early adulthood with a subsequent drop over the course of age. Conversely, lifelong reductions in protein translation have been found to extend lifespan and healthspan in multiple animal models. These findings raise the protein synthesis paradox: age-related declines in protein synthesis should be detrimental, but life-long reductions in protein translation paradoxically slow down aging and prolong lifespan. This article discusses the nature of this paradox and complies an extensive body of work demonstrating protein translation as a modulator of lifespan and healthspan.
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Affiliation(s)
- Harper S. Kim
- Center for Neurodegeneration and Experimental Therapeutics (CNET), Department of Neurology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- Medical Scientist Training Program, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Andrew M. Pickering
- Center for Neurodegeneration and Experimental Therapeutics (CNET), Department of Neurology, Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
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27
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Bellanti F, Lo Buglio A, Vendemiale G. Muscle Delivery of Mitochondria-Targeted Drugs for the Treatment of Sarcopenia: Rationale and Perspectives. Pharmaceutics 2022; 14:pharmaceutics14122588. [PMID: 36559079 PMCID: PMC9782427 DOI: 10.3390/pharmaceutics14122588] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/18/2022] [Accepted: 11/19/2022] [Indexed: 11/27/2022] Open
Abstract
An impairment in mitochondrial homeostasis plays a crucial role in the process of aging and contributes to the incidence of age-related diseases, including sarcopenia, which is defined as an age-dependent loss of muscle mass and strength. Mitochondrial dysfunction exerts a negative impact on several cellular activities, including bioenergetics, metabolism, and apoptosis. In sarcopenia, mitochondria homeostasis is disrupted because of reduced oxidative phosphorylation and ATP generation, the enhanced production of reactive species, and impaired antioxidant defense. This review re-establishes the most recent evidence on mitochondrial defects that are thought to be relevant in the pathogenesis of sarcopenia and that may represent promising therapeutic targets for its prevention/treatment. Furthermore, we describe mechanisms of action and translational potential of promising mitochondria-targeted drug delivery systems, including molecules able to boost the metabolism and bioenergetics, counteract apoptosis, antioxidants to scavenge reactive species and decrease oxidative stress, and target mitophagy. Even though these mitochondria-delivered strategies demonstrate to be promising in preclinical models, their use needs to be promoted for clinical studies. Therefore, there is a compelling demand to further understand the mechanisms modulating mitochondrial homeostasis, to characterize powerful compounds that target muscle mitochondria to prevent sarcopenia in aged people.
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28
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Hintze S, Baber L, Hofmeister F, Jarmusch S, Todorow V, Mehaffey S, Tanganelli F, Ferrari U, Neuerburg C, Teupser D, Bidlingmaier M, Marques JG, Koletzko B, Schoser B, Drey M, Meinke P. Exploration of mitochondrial defects in sarcopenic hip fracture patients. Heliyon 2022; 8:e11143. [PMID: 36303924 PMCID: PMC9593198 DOI: 10.1016/j.heliyon.2022.e11143] [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: 04/08/2022] [Revised: 08/05/2022] [Accepted: 10/13/2022] [Indexed: 11/06/2022] Open
Abstract
Severe cases of age-related loss of muscle function and mass are clinically unique to sarcopenia. Mitochondrial dysfunction has been associated with aging and sarcopenia, but the causal connection in this context is not well eluded. Here we investigated different aspects of mitochondrial respiration in sarcopenia. Open muscle biopsies were taken from a total of 31 hip fracture patients, older than 70 years. Patients were assigned a sarcopenia Z-score based on EWGSOP2 criteria. Primary myoblast cultures were generated from the muscle tissue samples and used for real time metabolic measurement. Muscle and serum samples showed correlation of high Z-scores with reduced mitochondrial complex I activity, increased tricarboxylic acid cycle (TCA) metabolites, reduced vitamin D3 levels, and signs of an altered iron metabolism. Primary myoblast cultures gained from the same muscle biopsies did not show significant mitochondrial defects. We hypothesize that a sum of external consequences, including vitamin D3 deficiency and iron deficiency caused by disturbances in the iron metabolism, result in complex I deficiency, which in turn affects the TCA and contributes to muscle weakness and loss.
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Affiliation(s)
- Stefan Hintze
- Friedrich-Baur-Institute at the Department of Neurology, LMU Klinikum, LMU Munich, Germany
| | - Lisa Baber
- Department of Medicine IV, Geriatrics, LMU Klinikum, LMU Munich, Germany
| | - Fabian Hofmeister
- Department of Medicine IV, Geriatrics, LMU Klinikum, LMU Munich, Germany
| | - Stefanie Jarmusch
- Department of Medicine IV, Geriatrics, LMU Klinikum, LMU Munich, Germany
| | - Vanessa Todorow
- Friedrich-Baur-Institute at the Department of Neurology, LMU Klinikum, LMU Munich, Germany
| | - Stefan Mehaffey
- Department of General-, Trauma- and Reconstructive Surgery, LMU Klinikum, LMU Munich, Germany
| | - Fabiana Tanganelli
- Department of Medicine IV, Geriatrics, LMU Klinikum, LMU Munich, Germany
| | - Uta Ferrari
- Department of Medicine IV, Geriatrics, LMU Klinikum, LMU Munich, Germany
| | - Carl Neuerburg
- Department of General-, Trauma- and Reconstructive Surgery, LMU Klinikum, LMU Munich, Germany
| | - Daniel Teupser
- Institute of Laboratory Medicine, LMU Klinikum, LMU Munich, Germany
| | | | - Jair Gonzalez Marques
- Department Pediatrics, Dr. von Hauner Children's Hospital, LMU Klinikum, LMU Munich, Germany
| | - Berthold Koletzko
- Department Pediatrics, Dr. von Hauner Children's Hospital, LMU Klinikum, LMU Munich, Germany
| | - Benedikt Schoser
- Friedrich-Baur-Institute at the Department of Neurology, LMU Klinikum, LMU Munich, Germany
| | - Michael Drey
- Department of Medicine IV, Geriatrics, LMU Klinikum, LMU Munich, Germany
| | - Peter Meinke
- Friedrich-Baur-Institute at the Department of Neurology, LMU Klinikum, LMU Munich, Germany
- Corresponding author.
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29
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Kunz HE, Michie KL, Gries KJ, Zhang X, Ryan ZC, Lanza IR. A Randomized Trial of the Effects of Dietary n3-PUFAs on Skeletal Muscle Function and Acute Exercise Response in Healthy Older Adults. Nutrients 2022; 14:nu14173537. [PMID: 36079794 PMCID: PMC9459748 DOI: 10.3390/nu14173537] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2022] [Revised: 08/23/2022] [Accepted: 08/24/2022] [Indexed: 12/16/2022] Open
Abstract
Skeletal muscle is critical for maintaining mobility, independence, and metabolic health in older adults. However, a common feature of aging is the progressive loss of skeletal muscle mass and function, which is often accompanied by mitochondrial impairments, oxidative stress, and insulin resistance. Exercise improves muscle strength, mitochondrial health, and cardiorespiratory fitness, but older adults often exhibit attenuated anabolic responses to acute exercise. Chronic inflammation associated with aging may contribute to this "anabolic resistance" and therapeutic interventions that target inflammation may improve exercise responsiveness. To this end, we conducted a randomized controlled trial to determine the effect of 6 months of dietary omega-3 polyunsaturated fatty acids (n3-PUFA) supplementation on skeletal muscle function (mass, strength), mitochondrial physiology (respiration, ATP production, ROS generation), and acute exercise responsiveness at the level of the muscle (fractional synthesis rate) and the whole-body (amino acid kinetics) in healthy older adults. When compared with a corn oil placebo (n = 33; 71.5 ± 4.8 years), older adults treated with 4 g/day n3-PUFA (n = 30; 71.4 ± 4.5 years) exhibited modest but significant increases in muscle strength (3.1 ± 14.7% increase in placebo vs. 7.5 ± 14.1% increase in n3-PUFA; p = 0.039). These improvements in muscle strength with n3-PUFA supplementation occurred in the absence of any effects on mitochondrial function and a minor attenuation of the acute response to exercise compared to placebo. Together, these data suggest modest benefits of dietary n3-PUFAs to muscle function in healthy older adults. Future studies may elucidate whether n3-PUFA supplementation improves the exercise response in elderly individuals with co-morbidities, such as chronic inflammatory disease or sarcopenia.
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Affiliation(s)
- Hawley E. Kunz
- Endocrine Research Unit, Division of Endocrinology, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Kelly L. Michie
- Endocrine Research Unit, Division of Endocrinology, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Kevin J. Gries
- Endocrine Research Unit, Division of Endocrinology, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Physical Therapy, School of Health Professions, Concordia University of Wisconsin, Mequon, WI 53097, USA
| | - Xiaoyan Zhang
- Endocrine Research Unit, Division of Endocrinology, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Department of Geriatrics, Shanghai Jiaotong University Affiliated Sixth People’s Hospital, Shanghai 200233, China
| | - Zachary C. Ryan
- Endocrine Research Unit, Division of Endocrinology, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA
| | - Ian R. Lanza
- Endocrine Research Unit, Division of Endocrinology, Department of Internal Medicine, Mayo Clinic, Rochester, MN 55905, USA
- Correspondence:
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30
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Sligar J, Debruin DA, Saner NJ, Philp AM, Philp A. The importance of mitochondrial quality control for maintaining skeletal muscle function across healthspan. Am J Physiol Cell Physiol 2022; 322:C461-C467. [PMID: 35108118 DOI: 10.1152/ajpcell.00388.2021] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
As the principal energy-producing organelles of the cell, mitochondria support numerous biological processes related to metabolism, growth and regeneration in skeletal muscle. Deterioration in skeletal muscle functional capacity with age is thought to be driven in part by a reduction in skeletal muscle oxidative capacity and reduced fatigue resistance. Underlying this maladaptive response is the development of mitochondrial dysfunction caused by alterations in mitochondrial quality control (MQC), a term encompassing processes of mitochondrial synthesis (biogenesis), remodelling (dynamics) and degradation (mitophagy). Knowledge regarding the role and regulation of MQC in skeletal muscle and the influence of ageing in this process have rapidly advanced in the last decade. Given the emerging link between ageing and MQC, therapeutic approaches to manipulate MQC to prevent mitochondrial dysfuntion during ageing hold tremendous therapeutic potential.
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Affiliation(s)
- James Sligar
- Mitochondrial Metabolism and Ageing Laboratory, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,St Vincent's Medical School, UNSW Medicine, UNSW Sydney, Sydney, New South Wales, Australia
| | - Danielle A Debruin
- Australian Institute for Musculoskeletal Science (AIMSS), Victoria University, Sunshine Hospital, St Albans, Australia.,Institute for Health and Sport, Victoria University, Melbourne, Australia
| | - Nicholas J Saner
- Human Integrative Physiology, Baker Heart and Diabetes Institute, Melbourne, Australia
| | - Ashleigh M Philp
- Mitochondrial Metabolism and Ageing Laboratory, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,St Vincent's Medical School, UNSW Medicine, UNSW Sydney, Sydney, New South Wales, Australia
| | - Andrew Philp
- Mitochondrial Metabolism and Ageing Laboratory, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,St Vincent's Medical School, UNSW Medicine, UNSW Sydney, Sydney, New South Wales, Australia
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31
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Simha V, Lanza IR, Dasari S, Klaus KA, Le Brasseur N, Vuckovic I, Laurenti MC, Cobelli C, Port JD, Nair KS. Impaired Muscle Mitochondrial Function in Familial Partial Lipodystrophy. J Clin Endocrinol Metab 2022; 107:346-362. [PMID: 34614176 PMCID: PMC8764358 DOI: 10.1210/clinem/dgab725] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Indexed: 01/04/2023]
Abstract
CONTEXT Familial partial lipodystrophy (FPL), Dunnigan variety is characterized by skeletal muscle hypertrophy and insulin resistance besides fat loss from the extremities. The cause for the muscle hypertrophy and its functional consequences is not known. OBJECTIVE To compare muscle strength and endurance, besides muscle protein synthesis rate between subjects with FPL and matched controls (n = 6 in each group). In addition, we studied skeletal muscle mitochondrial function and gene expression pattern to help understand the mechanisms for the observed differences. METHODS Body composition by dual-energy X-ray absorptiometry, insulin sensitivity by minimal modelling, assessment of peak muscle strength and fatigue, skeletal muscle biopsy and calculation of muscle protein synthesis rate, mitochondrial respirometry, skeletal muscle transcriptome, proteome, and gene set enrichment analysis. RESULTS Despite increased muscularity, FPL subjects did not demonstrate increased muscle strength but had earlier fatigue on chest press exercise. Decreased mitochondrial state 3 respiration in the presence of fatty acid substrate was noted, concurrent to elevated muscle lactate and decreased long-chain acylcarnitine. Based on gene transcriptome, there was significant downregulation of many critical metabolic pathways involved in mitochondrial biogenesis and function. Moreover, the overall pattern of gene expression was indicative of accelerated aging in FPL subjects. A lower muscle protein synthesis and downregulation of gene transcripts involved in muscle protein catabolism was observed. CONCLUSION Increased muscularity in FPL is not due to increased muscle protein synthesis and is likely due to reduced muscle protein degradation. Impaired mitochondrial function and altered gene expression likely explain the metabolic abnormalities and skeletal muscle dysfunction in FPL subjects.
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MESH Headings
- Absorptiometry, Photon
- Adult
- Aged
- Female
- Gene Expression Profiling
- Humans
- Lipodystrophy, Familial Partial/genetics
- Lipodystrophy, Familial Partial/metabolism
- Lipodystrophy, Familial Partial/pathology
- Lipodystrophy, Familial Partial/physiopathology
- Male
- Middle Aged
- Mitochondria, Muscle/metabolism
- Mitochondria, Muscle/pathology
- Muscle Strength/physiology
- Muscle, Skeletal/cytology
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Physical Endurance/physiology
- Proteolysis
- Young Adult
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Affiliation(s)
- Vinaya Simha
- Divisions of Endocrinology, Mayo Clinic, Rochester, MN 55905, USA
| | - Ian R Lanza
- Divisions of Endocrinology, Mayo Clinic, Rochester, MN 55905, USA
| | - Surendra Dasari
- Biomedical Statistics and Informatics, Mayo Clinic, Rochester, MN 55905, USA
| | | | - Nathan Le Brasseur
- Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN 55905, USA
| | - Ivan Vuckovic
- Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905, USA
| | | | | | - John D Port
- Radiology, Mayo Clinic, Rochester, MN 55905, USA
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Egawa T, Ogawa T, Yokokawa T, Kido K, Goto K, Hayashi T. Methylglyoxal reduces molecular responsiveness to 4 weeks of endurance exercise in mouse plantaris muscle. J Appl Physiol (1985) 2022; 132:477-488. [PMID: 35023763 DOI: 10.1152/japplphysiol.00539.2021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Endurance exercise triggers skeletal muscle adaptations, including enhanced insulin signaling, glucose metabolism, and mitochondrial biogenesis. However, exercise-induced skeletal muscle adaptations may not occur in some cases, a condition known as exercise-resistance. Methylglyoxal (MG) is a highly reactive dicarbonyl metabolite and has detrimental effects on the body such as causing diabetic complications, mitochondrial dysfunction, and inflammation. This study aimed to clarify the effect of methylglyoxal on skeletal muscle molecular adaptations following endurance exercise. Mice were randomly divided into 4 groups (n = 12 per group): sedentary control group, voluntary exercise group, MG-treated group, and MG-treated with voluntary exercise group. Mice in the voluntary exercise group were housed in a cage with a running wheel, while mice in the MG-treated groups received drinking water containing 1% MG. Four weeks of voluntary exercise induced several molecular adaptations in the plantaris muscle, including increased expression of peroxisome proliferator-activated receptor gamma coactivator 1 alpha (PGC1α), mitochondria complex proteins, toll-like receptor 4 (TLR4), 72-kDa heat shock protein (HSP72), hexokinase II, and glyoxalase 1; this also enhanced insulin-stimulated Akt Ser473 phosphorylation and citrate synthase activity. However, these adaptations were suppressed with MG treatment. In the soleus muscle, the exercise-induced increases in the expression of TLR4, HSP72, and advanced glycation end products receptor 1 were inhibited with MG treatment. These findings suggest that MG is a factor that inhibits endurance exercise-induced molecular responses including mitochondrial adaptations, insulin signaling activation, and the upregulation of several proteins related to mitochondrial biogenesis, glucose handling, and glycation in primarily fast-twitch skeletal muscle.
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Affiliation(s)
- Tatsuro Egawa
- Laboratory of Health and Exercise Sciences, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Takeshi Ogawa
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
| | - Takumi Yokokawa
- Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | - Kohei Kido
- Faculty of Sports and Health Science, Fukuoka University, Fukuoka, Japan.,Institute for Physical Activity, Fukuoka University, Fukuoka, Japan
| | - Katsumasa Goto
- Laboratory of Physiology, Graduate School of Health Sciences, Toyohashi SOZO University, Aichi, Japan
| | - Tatsuya Hayashi
- Laboratory of Sports and Exercise Medicine, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan
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Di Girolamo FG, Fiotti N, Sisto UG, Nunnari A, Colla S, Mearelli F, Vinci P, Schincariol P, Biolo G. Skeletal Muscle in Hypoxia and Inflammation: Insights on the COVID-19 Pandemic. Front Nutr 2022; 9:865402. [PMID: 35529457 PMCID: PMC9072827 DOI: 10.3389/fnut.2022.865402] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Accepted: 03/09/2022] [Indexed: 12/23/2022] Open
Abstract
SARS-CoV-2 infection is often associated with severe inflammation, oxidative stress, hypoxia and impaired physical activity. These factors all together contribute to muscle wasting and fatigue. In addition, there is evidence of a direct SARS-CoV-2 viral infiltration into skeletal muscle. Aging is often characterized by sarcopenia or sarcopenic obesity These conditions are risk factors for severe acute COVID-19 and long-COVID-19 syndrome. From these observations we may predict a strong association between COVID-19 and decreased muscle mass and functions. While the relationship between physical inactivity, chronic inflammation, oxidative stress and muscle dysfunction is well-known, the effects on muscle mass of COVID-19-related hypoxemia are inadequately investigated. The aim of this review is to highlight metabolic, immunity-related and redox biomarkers potentially affected by reduced oxygen availability and/or muscle fatigue in order to shed light on the negative impact of COVID-19 on muscle mass and function. Possible countermeasures are also reviewed.
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Affiliation(s)
- Filippo G. Di Girolamo
- Department of Medical Surgical ad Health Science, Clinica Medica, Cattinara Hospital, University of Trieste, Trieste, Italy
- SC Assistenza Farmaceutica, Cattinara Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
- *Correspondence: Filippo G. Di Girolamo
| | - Nicola Fiotti
- Department of Medical Surgical ad Health Science, Clinica Medica, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Ugo G. Sisto
- Department of Medical Surgical ad Health Science, Clinica Medica, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Alessio Nunnari
- Department of Medical Surgical ad Health Science, Clinica Medica, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Stefano Colla
- SC Assistenza Farmaceutica, Cattinara Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Filippo Mearelli
- Department of Medical Surgical ad Health Science, Clinica Medica, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Pierandrea Vinci
- Department of Medical Surgical ad Health Science, Clinica Medica, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Paolo Schincariol
- SC Assistenza Farmaceutica, Cattinara Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Gianni Biolo
- Department of Medical Surgical ad Health Science, Clinica Medica, Cattinara Hospital, University of Trieste, Trieste, Italy
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Krueger KJ, Rahman FK, Shen Q, Vacek J, Hiebert JB, Pierce JD. Mitochondrial bioenergetics and D-ribose in HFpEF: a brief narrative review. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:1504. [PMID: 34805366 PMCID: PMC8573443 DOI: 10.21037/atm-21-2291] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/15/2021] [Indexed: 11/24/2022]
Abstract
Objective In this review article, we briefly describe the status of treatment options for HFpEF and the role of mitochondrial dysfunction in the pathogenesis of HFpEF as an alternative therapeutic target. We also examine the mechanisms of D-ribose in cellular energy production and discuss the potential disadvantages and benefits of supplemental use of D-ribose in patients with HFpEF. Background Heart failure is a major cardiovascular disease that impacts over 6 million Americans and is one of the leading causes for morbidity and mortality. Patients with heart failure often experience shortness of breath and fatigue along with impaired physical capacity, all leading to poor quality of life. As a subtype of heart failure, heart failure with preserved ejection fraction (HFpEF) is characterized with impaired diastolic function. Currently, there are no effective treatments specifically for HFpEF, thus clinicians and researchers are searching for therapies to improve cardiac function. Emerging evidence indicate that mitochondrial dysfunction and impaired cardiac bioenergetics are among the underlying mechanisms for HFpEF. There is increased interest in investigating the use of supplements such as D-ribose to enhance mitochondrial function and improve production of adenosine triphosphate (ATP). Methods For this narrative review, more than 100 relevant scientific articles were considered from various databases (e.g., PubMed, Web of Science, CINAHL, and Google Scholar) using the keywords “Heart Failure”, “HFpEF”, “D-ribose”, “ATP”, “Mitochondria”, Bioenergetics”, and “Cellular Respiration”. Conclusions It is essential to find potential targeted therapeutic treatments for HFpEF. Since there is evidence that the HFpEF is related to impaired myocardial bioenergetics, enhancing mitochondrial function could augment cardiac function. Using a supplement such as D-ribose could improve mitochondrial function by increasing ATP and enhancing cardiac performance for patients with HFpEF. There is a recently completed clinical trial with HFpEF patients that indicates D-ribose increases ATP production and improves cardiac ejection fraction.
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Affiliation(s)
- Kathryn J Krueger
- School of Nursing, University of Kansas Medical Center, Kansas City, KS, USA
| | - Faith K Rahman
- School of Nursing, University of Kansas Medical Center, Kansas City, KS, USA
| | - Qiuhua Shen
- School of Nursing, University of Kansas Medical Center, Kansas City, KS, USA
| | - James Vacek
- The University of Kansas Health System, Kansas City, KS, USA
| | - John B Hiebert
- School of Nursing, University of Kansas Medical Center, Kansas City, KS, USA
| | - Janet D Pierce
- School of Nursing, University of Kansas Medical Center, Kansas City, KS, USA
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Latham CM, Owen RN, Dickson EC, Guy CP, White-Springer SH. Skeletal Muscle Adaptations to Exercise Training in Young and Aged Horses. FRONTIERS IN AGING 2021; 2:708918. [PMID: 35822026 PMCID: PMC9261331 DOI: 10.3389/fragi.2021.708918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 09/17/2021] [Indexed: 11/17/2022]
Abstract
In aged humans, low-intensity exercise increases mitochondrial density, function and oxidative capacity, decreases the prevalence of hybrid fibers, and increases lean muscle mass, but these adaptations have not been studied in aged horses. Effects of age and exercise training on muscle fiber type and size, satellite cell abundance, and mitochondrial volume density (citrate synthase activity; CS), function (cytochrome c oxidase activity; CCO), and integrative (per mg tissue) and intrinsic (per unit CS) oxidative capacities were evaluated in skeletal muscle from aged (n = 9; 22 ± 5 yr) and yearling (n = 8; 9.7 ± 0.7 mo) horses. Muscle was collected from the gluteus medius (GM) and triceps brachii at wk 0, 8, and 12 of exercise training. Data were analyzed using linear models with age, training, muscle, and all interactions as fixed effects. At wk 0, aged horses exhibited a lower percentage of type IIx (p = 0.0006) and greater percentage of hybrid IIa/x fibers (p = 0.002) in the GM, less satellite cells per type II fiber (p = 0.03), lesser integrative and intrinsic (p ≤ 0.04) CCO activities, lesser integrative oxidative phosphorylation capacity with complex I (PCI; p = 0.02) and maximal electron transfer system capacity (ECI+II; p = 0.06), and greater intrinsic PCI, ECI+II, and electron transfer system capacity with complex II (ECII; p ≤ 0.05) than young horses. The percentage of type IIx fibers increased (p < 0.0001) and of type IIa/x fibers decreased (p = 0.001) in the GM, and the number of satellite cells per type II fiber increased (p = 0.0006) in aged horses following exercise training. Conversely, the percentage of type IIa/x fibers increased (p ≤ 0.01) and of type IIx fibers decreased (p ≤ 0.002) in young horses. Integrative maximal oxidative capacity (p ≤ 0.02), ECI+II (p ≤ 0.07), and ECII (p = 0.0003) increased for both age groups from wk 0 to 12. Following exercise training, aged horses had a greater percentage of IIx (p ≤ 0.002) and lesser percentage of IIa/x fibers (p ≤ 0.07), and more satellite cells per type II fiber (p = 0.08) than young horses, but sustained lesser integrative and intrinsic CCO activities (p ≤ 0.04) and greater intrinsic PCI, ECI+II, and ECII (p ≤ 0.05). Exercise improved mitochondrial measures in young and aged horses; however, aged horses showed impaired mitochondrial function and differences in adaptation to exercise training.
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Affiliation(s)
| | | | | | | | - Sarah H. White-Springer
- Texas A&M AgriLife Research and Department of Animal Science, Texas A&M University, College Station, TX, United States
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36
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Making Sense of Muscle Protein Synthesis: A Focus on Muscle Growth During Resistance Training. Int J Sport Nutr Exerc Metab 2021; 32:49-61. [PMID: 34697259 DOI: 10.1123/ijsnem.2021-0139] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 07/20/2021] [Accepted: 09/20/2021] [Indexed: 11/18/2022]
Abstract
The acute response of muscle protein synthesis (MPS) to resistance exercise and nutrition is often used to inform recommendations for exercise programming and dietary interventions, particularly protein nutrition, to support and enhance muscle growth with training. Those recommendations are worthwhile only if there is a predictive relationship between the acute response of MPS and subsequent muscle hypertrophy during resistance exercise training. The metabolic basis for muscle hypertrophy is the dynamic balance between the synthesis and degradation of myofibrillar proteins in muscle. There is ample evidence that the process of MPS is much more responsive to exercise and nutrition interventions than muscle protein breakdown. Thus, it is intuitively satisfying to translate the acute changes in MPS to muscle hypertrophy with training over a longer time frame. Our aim is to examine and critically evaluate the strength and nature of this relationship. Moreover, we examine the methodological and physiological factors related to measurement of MPS and changes in muscle hypertrophy that contribute to uncertainty regarding this relationship. Finally, we attempt to offer recommendations for practical and contextually relevant application of the information available from studies of the acute response of MPS to optimize muscle hypertrophy with training.
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37
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Renzini A, Riera CS, Minic I, D’Ercole C, Lozanoska-Ochser B, Cedola A, Gigli G, Moresi V, Madaro L. Metabolic Remodeling in Skeletal Muscle Atrophy as a Therapeutic Target. Metabolites 2021; 11:517. [PMID: 34436458 PMCID: PMC8398298 DOI: 10.3390/metabo11080517] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 08/03/2021] [Accepted: 08/04/2021] [Indexed: 02/07/2023] Open
Abstract
Skeletal muscle is a highly responsive tissue, able to remodel its size and metabolism in response to external demand. Muscle fibers can vary from fast glycolytic to slow oxidative, and their frequency in a specific muscle is tightly regulated by fiber maturation, innervation, or external causes. Atrophic conditions, including aging, amyotrophic lateral sclerosis, and cancer-induced cachexia, differ in the causative factors and molecular signaling leading to muscle wasting; nevertheless, all of these conditions are characterized by metabolic remodeling, which contributes to the pathological progression of muscle atrophy. Here, we discuss how changes in muscle metabolism can be used as a therapeutic target and review the evidence in support of nutritional interventions and/or physical exercise as tools for counteracting muscle wasting in atrophic conditions.
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Affiliation(s)
- Alessandra Renzini
- Unit of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University of Rome, 00185 Rome, Italy; (A.R.); (C.S.R.); (I.M.); (C.D.); (B.L.-O.); (L.M.)
| | - Carles Sánchez Riera
- Unit of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University of Rome, 00185 Rome, Italy; (A.R.); (C.S.R.); (I.M.); (C.D.); (B.L.-O.); (L.M.)
| | - Isidora Minic
- Unit of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University of Rome, 00185 Rome, Italy; (A.R.); (C.S.R.); (I.M.); (C.D.); (B.L.-O.); (L.M.)
| | - Chiara D’Ercole
- Unit of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University of Rome, 00185 Rome, Italy; (A.R.); (C.S.R.); (I.M.); (C.D.); (B.L.-O.); (L.M.)
| | - Biliana Lozanoska-Ochser
- Unit of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University of Rome, 00185 Rome, Italy; (A.R.); (C.S.R.); (I.M.); (C.D.); (B.L.-O.); (L.M.)
| | - Alessia Cedola
- Institute of Nanotechnology, c/o Dipartimento di Fisica, National Research Council (CNR-NANOTEC), Sapienza University of Rome, 00185 Rome, Italy;
| | - Giuseppe Gigli
- Institute of Nanotechnology, c/o Campus Ecotekne, National Research Council (CNR-NANOTEC), Monteroni, 73100 Lecce, Italy;
| | - Viviana Moresi
- Unit of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University of Rome, 00185 Rome, Italy; (A.R.); (C.S.R.); (I.M.); (C.D.); (B.L.-O.); (L.M.)
- Institute of Nanotechnology, c/o Dipartimento di Fisica, National Research Council (CNR-NANOTEC), Sapienza University of Rome, 00185 Rome, Italy;
| | - Luca Madaro
- Unit of Histology and Medical Embryology, Department of Anatomy, Histology, Forensic Medicine and Orthopaedics, Sapienza University of Rome, 00185 Rome, Italy; (A.R.); (C.S.R.); (I.M.); (C.D.); (B.L.-O.); (L.M.)
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Abbott CB, Lawrence MM, Kobak KA, Lopes EBP, Peelor FF, Donald EJ, Van Remmen H, Griffin TM, Miller BF. A Novel Stable Isotope Approach Demonstrates Surprising Degree of Age-Related Decline in Skeletal Muscle Collagen Proteostasis. FUNCTION (OXFORD, ENGLAND) 2021; 2:zqab028. [PMID: 34124684 PMCID: PMC8187230 DOI: 10.1093/function/zqab028] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/08/2021] [Accepted: 05/07/2021] [Indexed: 02/06/2023]
Abstract
Age-related deterioration in turnover of collagen proteins accelerates extracellular matrix fibrosis and hinders adaptation to external stimuli. This project sought to understand factors that increase skeletal muscle fibrosis with age by studying what we term the dynamic protein pool. We hypothesized that the dynamic protein pool size of muscle collagen decreases with age, thus indicating a decrease in proteostatic maintenance (ie, ability to maintain proteostasis), and that failure to account for these changes impacts the interpretation of tracer-measured synthesis rates. We used deuterium oxide (D2O) labeling for up to 60 days in adult (6 months) and old (23 months) mice. The dynamic protein pool in adult skeletal muscle was 65% in tibialis anterior (TA), but only 28% in gastrocnemius (Gastroc). In aged muscle, the dynamic protein pool was further decreased to only 35% and 14% for TA and Gastroc, respectively. We showed that this loss in dynamic pool size was associated with increases in markers of fibrosis and decreased proteostatic maintenance. We demonstrate that aged muscle has higher rates of collagen protein synthesis and lower rates of collagen protein breakdown, which causes collagen accumulation. We further demonstrated that the normal assumption of complete protein renewal and the standard practice of taking a single sample with isotope labeling have profound impacts on interpretation of the genesis of fibrosis. Strategies to maintain muscle function with aging should focus on the dynamic protein pool with attention to methodological strategies to assess those changes.
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Affiliation(s)
| | | | - Kamil A Kobak
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Erika Barboza Prado Lopes
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Frederick F Peelor
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Elizabeth J Donald
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Holly Van Remmen
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
| | - Timothy M Griffin
- Aging and Metabolism Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA
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Lee EJ, Neppl RL. Influence of Age on Skeletal Muscle Hypertrophy and Atrophy Signaling: Established Paradigms and Unexpected Links. Genes (Basel) 2021; 12:genes12050688. [PMID: 34063658 PMCID: PMC8147613 DOI: 10.3390/genes12050688] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 04/26/2021] [Accepted: 04/27/2021] [Indexed: 12/16/2022] Open
Abstract
Skeletal muscle atrophy in an inevitable occurrence with advancing age, and a consequence of disease including cancer. Muscle atrophy in the elderly is managed by a regimen of resistance exercise and increased protein intake. Understanding the signaling that regulates muscle mass may identify potential therapeutic targets for the prevention and reversal of muscle atrophy in metabolic and neuromuscular diseases. This review covers the major anabolic and catabolic pathways that regulate skeletal muscle mass, with a focus on recent progress and potential new players.
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40
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Maintenance of Skeletal Muscle to Counteract Sarcopenia in Patients with Advanced Chronic Kidney Disease and Especially Those Undergoing Hemodialysis. Nutrients 2021; 13:nu13051538. [PMID: 34063269 PMCID: PMC8147474 DOI: 10.3390/nu13051538] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 04/28/2021] [Accepted: 04/30/2021] [Indexed: 12/18/2022] Open
Abstract
Life extension in modern society has introduced new concepts regarding such disorders as frailty and sarcopenia, which has been recognized in various studies. At the same time, cutting-edge technology methods, e.g., renal replacement therapy for conditions such as hemodialysis (HD), have made it possible to protect patients from advanced lethal chronic kidney disease (CKD). Loss of muscle and fat mass, termed protein energy wasting (PEW), has been recognized as prognostic factor and, along with the increasing rate of HD introduction in elderly individuals in Japan, appropriate countermeasures are necessary. Although their origins differ, frailty, sarcopenia, and PEW share common components, among which skeletal muscle plays a central role in their etiologies. The nearest concept may be sarcopenia, for which diagnosis techniques have recently been reported. The focus of this review is on maintenance of skeletal muscle against aging and CKD/HD, based on muscle physiology and pathology. Clinically relevant and topical factors related to muscle wasting including sarcopenia, such as vitamin D, myostatin, insulin (related to diabetes), insulin-like growth factor I, mitochondria, and physical inactivity, are discussed. Findings presented thus far indicate that in addition to modulation of the aforementioned factors, exercise combined with nutritional supplementation may be a useful approach to overcome muscle wasting and sarcopenia in elderly patients undergoing HD treatments.
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41
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Allen SL, Marshall RN, Edwards SJ, Lord JM, Lavery GG, Breen L. The effect of young and old ex vivo human serum on cellular protein synthesis and growth in an in vitro model of aging. Am J Physiol Cell Physiol 2021; 321:C26-C37. [PMID: 33909501 DOI: 10.1152/ajpcell.00093.2021] [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] [Indexed: 01/06/2023]
Abstract
In vitro models of muscle aging are useful for understanding mechanisms of age-related muscle loss and aiding the development of targeted therapies. To investigate mechanisms of age-related muscle loss in vitro utilizing ex vivo human serum, fasted blood samples were obtained from four old (72 ± 1 yr) and four young (26 ± 3 yr) men. Older individuals had elevated levels of plasma CRP, IL-6, HOMA-IR, and lower concentric peak torque and work-per-repetition compared with young participants (P < 0.05). C2C12 myotubes were serum and amino acid starved for 1 h and conditioned with human serum (10%) for 4 h or 24 h. After 4 h, C2C12 cells were treated with 5 mM leucine for 30 min. Muscle protein synthesis (MPS) was determined through the surface sensing of translation (SUnSET) technique and regulatory signaling pathways were measured via Western blot. Myotube diameter was significantly reduced in myotubes treated with serum from old, in comparison to young donors (84%, P < 0.001). MPS was reduced in myotubes treated with old donor serum, compared with young serum before leucine treatment (32%, P < 0.01). MPS and the phosphorylation of Akt, p70S6K, and eEF2 were increased in myotubes treated with young serum in response to leucine treatment, with a blunted response identified in cells treated with old serum (P < 0.05). Muscle protein breakdown signaling pathways did not differ between groups. In summary, we show that myotubes conditioned with serum from older individuals had decreased myotube diameter and MPS compared with younger individuals, potentially driven by low-grade systemic inflammation.
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Affiliation(s)
- Sophie L Allen
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom.,National Institute for Health Research, Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, United Kingdom
| | - Ryan N Marshall
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, United Kingdom
| | - Sophie J Edwards
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Janet M Lord
- National Institute for Health Research, Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, United Kingdom.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, United Kingdom.,Institute of Inflammation and Ageing, University of Birmingham, Birmingham, United Kingdom
| | - Gareth G Lavery
- National Institute for Health Research, Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, United Kingdom.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, United Kingdom.,Institute of Metabolism and Systems Research, University of Birmingham, Birmingham, United Kingdom.,Centre for Endocrinology, Diabetes and Metabolism, Birmingham Health Partner, Birmingham, United Kingdom
| | - Leigh Breen
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom.,National Institute for Health Research, Birmingham Biomedical Research Centre, University Hospitals Birmingham NHS Foundation Trust and University of Birmingham, Birmingham, United Kingdom.,MRC-Versus Arthritis Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, United Kingdom
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42
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Clynes MA, Gregson CL, Bruyère O, Cooper C, Dennison EM. Osteosarcopenia: where osteoporosis and sarcopenia collide. Rheumatology (Oxford) 2021; 60:529-537. [PMID: 33276373 DOI: 10.1093/rheumatology/keaa755] [Citation(s) in RCA: 88] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 09/24/2020] [Accepted: 10/02/2020] [Indexed: 12/15/2022] Open
Abstract
The coexistence of osteoporosis and sarcopenia has been recently considered in some groups as a syndrome termed 'osteosarcopenia'. Osteoporosis describes low bone mass and deterioration of the micro-architecture of the bone, whereas sarcopenia is the loss of muscle mass, strength and function. With an ageing population the prevalence of both conditions is likely to increase substantially over the coming decades and is associated with significant personal and societal burden. The sequelae for an individual suffering from both conditions together include a greater risk of falls, fractures, institutionalization and mortality. The aetiology of 'osteosarcopenia' is multifactorial with several factors linking muscle and bone function, including genetics, age, inflammation and obesity. Several biochemical pathways have been identified that are facilitating the development of several promising therapeutic agents, which target both muscle and bone. In the current review we outline the epidemiology, pathogenesis and clinical consequences of 'osteosarcopenia' and explore current and potential future management strategies.
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Affiliation(s)
- Michael A Clynes
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK
| | - Celia L Gregson
- Musculoskeletal Research Unit, Bristol Medical School, University of Bristol, Bristol, UK
| | - Olivier Bruyère
- Division of Public Health, Epidemiology and Health Economics, WHO Collaborating Center for Public Health Aspects of Musculoskeletal Health and Ageing, University of Liège, Liège, Belgium
| | - Cyrus Cooper
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK.,NIHR Southampton Biomedical Research Centre, University of Southampton and University Hospitals Southampton NHS Foundation Trust, Southampton, UK.,NIHR Oxford Biomedical Research Unit, University of Oxford, Oxford, UK
| | - Elaine M Dennison
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton General Hospital, Southampton, UK
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Ichihara Y, Masuki S, Uchida K, Takahashi K, Nakajima M, Nose H. Effects of 5-aminolevulinic acid with iron supplementation on respiratory responses to graded cycling and interval walking training achievement in older women over 75 yrs. Exp Gerontol 2021; 150:111356. [PMID: 33864830 DOI: 10.1016/j.exger.2021.111356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/18/2021] [Accepted: 04/05/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Exercise training above a given intensity is necessary to prevent age-associated physical disability and diseases; however, the physical and psychological barriers posed by deteriorated physical fitness due to aging may hinder older people from performing daily exercise training. Because 5-aminolevulinic acid (ALA), a precursor of heme, reportedly improves mitochondrial function, we examined whether ALA, combined with sodium ferrous citrate (SFC) for enhancement, improved aerobic capacity and voluntary exercise training achievement in older women aged over 75 yrs. METHODS The study was conducted using a placebo-controlled, double-blind crossover design. Fifteen women aged ~78 yrs. with no exercise habits underwent two trials for 7 days each where they performed interval walking training (IWT), repeating fast and slow speeds of walking for 3 min each, at >70% and at ~40% of peak aerobic capacity for walking, respectively, with ALA+SFC (100 and 115 mg/day, respectively) or placebo supplement intake (CNT), with a 12-day washout period. Before and after each trial, subjects underwent a graded cycling test while having their oxygen consumption rate (V·O2), carbon dioxide production rate (V·CO2), and plasma lactate concentration ([Lac-]p) measured. Furthermore, during the supplement intake period, exercise intensity for IWT was measured by accelerometry. RESULTS In ALA+SFC, the increases in V·O2 and V·CO2 during the graded cycling test were attenuated (both, P < 0.01) with a 13% reduction in [Lac-]p (P = 0.012) while none of these attenuated responses occurred in CNT (all, P > 0.46). Furthermore, energy expenditure and time during fast walking for IWT were 25% (P = 0.032) and 21% (P = 0.022) higher in ALA+SFC than in CNT. CONCLUSION Thus, ALA+SFC supplementation improved aerobic capacity and thus increased fast-walking training achievement in older women.
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Affiliation(s)
- Yasuko Ichihara
- Departments of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto 390-8621, Japan; Fujimikougen Hospital, Fujimi 399-0214, Japan
| | - Shizue Masuki
- Departments of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto 390-8621, Japan; Institute for Biomedical Sciences, Shinshu University, Matsumoto 390-8621, Japan.
| | - Koji Uchida
- Departments of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto 390-8621, Japan; Departments of e-Health Sciences, Shinshu University Graduate School of Medicine, Matsumoto 390-8621, Japan
| | | | - Motowo Nakajima
- Department of R&D, SBI Pharma Co., Ltd., Tokyo 106-6020, Japan
| | - Hiroshi Nose
- Departments of Sports Medical Sciences, Shinshu University Graduate School of Medicine, Matsumoto 390-8621, Japan; Departments of e-Health Sciences, Shinshu University Graduate School of Medicine, Matsumoto 390-8621, Japan
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Abstract
Exercise stimulates the biogenesis of mitochondria in muscle. Some literature supports the use of pharmaceuticals to enhance mitochondria as a substitute for exercise. We provide evidence that exercise rejuvenates mitochondrial function, thereby augmenting muscle health with age, in disease, and in the absence of cellular regulators. This illustrates the power of exercise to act as mitochondrial medicine in muscle.
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Affiliation(s)
- Ashley N Oliveira
- Muscle Health Research Centre, School of Kinesiology and Health Science, York University, Toronto, Ontario M3J 1P3, Canada
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Nga HT, Jang IY, Kim DA, Park SJ, Lee JY, Lee S, Kim JH, Lee E, Park JH, Lee YH, Yi HS, Kim BJ. Serum GDF15 Level Is Independent of Sarcopenia in Older Asian Adults. Gerontology 2021; 67:525-531. [PMID: 33690236 DOI: 10.1159/000513600] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 12/07/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Growth differentiation factor 15 (GDF15), induced by tissue inflammation and mitochondrial stress, has received significant attention as a biomarker of mitochondrial dysfunction and has been implicated in various age-related diseases. However, the association between circulating GDF15 and sarcopenia-associated outcomes in older adults remains to be established. AIM To validate previous experimental data and to investigate the possible role of GDF15 in aging and muscle physiology in humans, this study examined serum GDF15 levels in relation to sarcopenia-related parameters in a cohort of older Asian adults. METHODS Muscle mass and muscle function-related parameters, such as grip strength, gait speed, chair stands, and short physical performance battery score were evaluated by experienced nurses in 125 geriatric participants with or without sarcopenia. Sarcopenia was diagnosed using the Asian-specific cutoff points. Serum GDF15 levels were measured using an enzyme immunoassay kit. RESULTS Serum GDF15 levels were not significantly different according to sarcopenia status, muscle mass, muscle strength, and physical performance and were not associated with the skeletal muscle index, grip strength, gait speed, time to complete 5 chair stands, and short physical performance battery score, regardless of adjustments for sex, age, and BMI. CONCLUSIONS These findings indicate that the definite role of GDF15 on muscle metabolism observed in animal models might not be evident in humans and that elevated GDF15 levels might not predict the risk for sarcopenia, at least in older Asian adults.
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Affiliation(s)
- Ha Thi Nga
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, Republic of Korea.,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, Republic of Korea
| | - Il-Young Jang
- Division of Geriatrics, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Da Ae Kim
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - So Jeong Park
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jin Young Lee
- Asan Institute for Life Sciences, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Seungjoo Lee
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jeoung Hee Kim
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Eunju Lee
- Division of Geriatrics, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Jin Hoon Park
- Department of Neurological Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
| | - Young-Ho Lee
- Protein Structure Group, Korea Basic Science Institute, Ochang, Cheongju, Republic of Korea
| | - Hyon-Seung Yi
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon, Republic of Korea, .,Department of Medical Science, Chungnam National University School of Medicine, Daejeon, Republic of Korea,
| | - Beom-Jun Kim
- Division of Endocrinology and Metabolism, Department of Internal Medicine, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea
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46
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Heinz D, Krotova E, Hamann A, Osiewacz HD. Simultaneous Ablation of the Catalytic AMPK α-Subunit SNF1 and Mitochondrial Matrix Protease CLPP Results in Pronounced Lifespan Extension. Front Cell Dev Biol 2021; 9:616520. [PMID: 33748105 PMCID: PMC7969656 DOI: 10.3389/fcell.2021.616520] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 01/27/2021] [Indexed: 12/21/2022] Open
Abstract
Organismic aging is known to be controlled by genetic and environmental traits. Pathways involved in the control of cellular metabolism play a crucial role. Previously, we identified a role of PaCLPP, a mitochondrial matrix protease, in the control of the mitochondrial energy metabolism, aging, and lifespan of the fungal aging model Podospora anserina. Most surprisingly, we made the counterintuitive observation that the ablation of this component of the mitochondrial quality control network leads to lifespan extension. In the current study, we investigated the role of energy metabolism of P. anserina. An age-dependent metabolome analysis of the wild type and a PaClpP deletion strain verified differences and changes of various metabolites in cultures of the PaClpP mutant and the wild type. Based on these data, we generated and analyzed a PaSnf1 deletion mutant and a ΔPaSnf1/ΔPaClpP double mutant. In both mutants PaSNF1, the catalytic α-subunit of AMP-activated protein kinase (AMPK) is ablated. PaSNF1 was found to be required for the development of fruiting bodies and ascospores and the progeny of sexual reproduction of this ascomycete and impact mitochondrial dynamics and autophagy. Most interestingly, while the single PaSnf1 deletion mutant is characterized by a slight lifespan increase, simultaneous deletion of PaSnf1 and PaClpP leads to a pronounced lifespan extension. This synergistic effect is strongly reinforced in the presence of the mating-type "minus"-linked allele of the rmp1 gene. Compared to the wild type, culture temperature of 35°C instead of the standard laboratory temperature of 27°C leads to a short-lived phenotype of the ΔPaSnf1/ΔPaClpP double mutant. Overall, our study provides novel evidence for complex interactions of different molecular pathways involved in mitochondrial quality control, gene expression, and energy metabolism in the control of organismic aging.
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Affiliation(s)
| | | | | | - Heinz D. Osiewacz
- Institute of Molecular Biosciences, J.W. Goethe University, Frankfurt am Main, Germany
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Gonzalez-Armenta JL, Li N, Lee RL, Lu B, Molina AJA. Heterochronic Parabiosis: Old Blood Induces Changes in Mitochondrial Structure and Function of Young Mice. J Gerontol A Biol Sci Med Sci 2021; 76:434-439. [PMID: 33377482 PMCID: PMC8177798 DOI: 10.1093/gerona/glaa299] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Indexed: 12/15/2022] Open
Abstract
Heterochronic parabiosis models have been utilized to demonstrate the role of blood-borne circulating factors in systemic effects of aging. In previous studies, heterochronic parabiosis has shown positive effects across multiple tissues in old mice. More recently, a study demonstrated old blood had a more profound negative effect on muscle performance and neurogenesis of young mice. In this study, we used heterochronic parabiosis to test the hypothesis that circulating factors mediate mitochondrial bioenergetic decline, a well-established biological hallmark of aging. We examined mitochondrial morphology, expression of mitochondrial complexes, and mitochondrial respiration from skeletal muscle of mice connected as heterochronic pairs, as well as young and old isochronic controls. Our results indicate that young heterochronic mice had significantly lower total mitochondrial content and on average had significantly smaller mitochondria compared to young isochronic controls. Expression of complex IV followed a similar pattern: young heterochronic mice had a trend for lower expression compared to young isochronic controls. Additionally, respirometric analyses indicate that young heterochronic mice had significantly lower complex I, complex I + II, and maximal mitochondrial respiration and a trend for lower complex II-driven respiration compared to young isochronic controls. Interestingly, we did not observe significant improvements in old heterochronic mice compared to old isochronic controls, demonstrating the profound deleterious effects of circulating factors from old mice on mitochondrial structure and function. We also found no significant differences between the young and old heterochronic mice, demonstrating that circulating factors can be a driver of age-related differences in mitochondrial structure and function.
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Affiliation(s)
- Jenny L Gonzalez-Armenta
- Section on Molecular Medicine, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
- Section on Gerontology and Geriatrics, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
- J Paul Sticht Center for Healthy Aging and Alzheimer’s Prevention, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Ning Li
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Rae-Ling Lee
- Section on Gerontology and Geriatrics, Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, North Carolina
- J Paul Sticht Center for Healthy Aging and Alzheimer’s Prevention, Wake Forest School of Medicine, Winston-Salem, North Carolina
| | - Baisong Lu
- Wake Forest Institute for Regenerative Medicine, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Anthony J A Molina
- Division of Geriatrics and Gerontology, Department of Medicine, University of California San Diego School of Medicine, La Jolla
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Harper C, Gopalan V, Goh J. Exercise rescues mitochondrial coupling in aged skeletal muscle: a comparison of different modalities in preventing sarcopenia. J Transl Med 2021; 19:71. [PMID: 33593349 PMCID: PMC7885447 DOI: 10.1186/s12967-021-02737-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 02/04/2021] [Indexed: 01/07/2023] Open
Abstract
Skeletal muscle aging is associated with a decline in motor function and loss of muscle mass- a condition known as sarcopenia. The underlying mechanisms that drive this pathology are associated with a failure in energy generation in skeletal muscle, either from age-related decline in mitochondrial function, or from disuse. To an extent, lifelong exercise is efficacious in preserving the energetic properties of skeletal muscle and thus may delay the onset of sarcopenia. This review discusses the cellular and molecular changes in skeletal muscle mitochondria during the aging process and how different exercise modalities work to reverse these changes. A key factor that will be described is the efficiency of mitochondrial coupling—ATP production relative to O2 uptake in myocytes and how that efficiency is a main driver for age-associated decline in skeletal muscle function. With that, we postulate the most effective exercise modality and protocol for reversing the molecular hallmarks of skeletal muscle aging and staving off sarcopenia. Two other concepts pertinent to mitochondrial efficiency in exercise-trained skeletal muscle will be integrated in this review, including- mitophagy, the removal of dysfunctional mitochondrial via autophagy, as well as the implications of muscle fiber type changes with sarcopenia on mitochondrial function.
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Affiliation(s)
- Colin Harper
- Clinical Translation Unit (CTU), Tulane University, New Orleans, USA
| | - Venkatesh Gopalan
- Agency for Science, Technology & Research (A*STAR), Singapore Bioimaging Consortium (SBIC), Singapore, Singapore
| | - Jorming Goh
- Healthy Longevity Translational Research Program, Yong Loo Lin School of Medicine, National University of Singapore (NUS), Singapore, Singapore. .,Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore. .,Centre for Healthy Longevity, National University Health System (NUHS), Singapore, Singapore.
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"Empowering" Cardiac Cells via Stem Cell Derived Mitochondrial Transplantation- Does Age Matter? Int J Mol Sci 2021; 22:ijms22041824. [PMID: 33673127 PMCID: PMC7918132 DOI: 10.3390/ijms22041824] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/08/2021] [Accepted: 02/09/2021] [Indexed: 12/19/2022] Open
Abstract
With cardiovascular diseases affecting millions of patients, new treatment strategies are urgently needed. The use of stem cell based approaches has been investigated during the last decades and promising effects have been achieved. However, the beneficial effect of stem cells has been found to being partly due to paracrine functions by alterations of their microenvironment and so an interesting field of research, the “stem- less” approaches has emerged over the last years using or altering the microenvironment, for example, via deletion of senescent cells, application of micro RNAs or by modifying the cellular energy metabolism via targeting mitochondria. Using autologous muscle-derived mitochondria for transplantations into the affected tissues has resulted in promising reports of improvements of cardiac functions in vitro and in vivo. However, since the targeted treatment group represents mainly elderly or otherwise sick patients, it is unclear whether and to what extent autologous mitochondria would exert their beneficial effects in these cases. Stem cells might represent better sources for mitochondria and could enhance the effect of mitochondrial transplantations. Therefore in this review we aim to provide an overview on aging effects of stem cells and mitochondria which might be important for mitochondrial transplantation and to give an overview on the current state in this field together with considerations worthwhile for further investigations.
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50
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Tharakan R, Ubaida-Mohien C, Piao Y, Gorospe M, Ferrucci L. Ribosome profiling analysis of human skeletal muscle identifies reduced translation of mitochondrial proteins with age. RNA Biol 2021; 18:1555-1559. [PMID: 33472542 DOI: 10.1080/15476286.2021.1875647] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
With advancing age, human muscle loses strength and function, but the molecular causes of these losses are unknown. Skeletal muscle shows an age-dependent decline in the levels of different proteins, but whether such decline is associated with reduced translation has not been studied. To address this gap of knowledge, we used the technique of ribosome profiling to study translation in muscle from middle-aged and old individuals. Using ribosome occupancy as a measure of translation status, several mRNAs showed differential translation with age. Older age was associated with lower translation of myosin and titin isoforms and more broadly with the translation of proteins involved in oxidative phosphorylation encoded by the mitochondrial genome. Based on our findings, we propose that mitochondrial proteins are less translated in old skeletal muscle.
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Affiliation(s)
- Ravi Tharakan
- Translational Gerontology Branch, National Institutes of Health, Baltimore, MD, USA.,Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD, USA
| | | | - Yulan Piao
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD, USA
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute on Aging Intramural Research Program, National Institutes of Health, Baltimore, MD, USA
| | - Luigi Ferrucci
- Translational Gerontology Branch, National Institutes of Health, Baltimore, MD, USA
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