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Takahashi R, Nojiri H, Ohara Y, Fujiwara T, Ishijima M. Decreased grip strength is associated with paraspinal muscular oxidative stress in female lumbar degenerative disease patients. J Orthop Res 2024. [PMID: 38650087 DOI: 10.1002/jor.25863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 04/08/2024] [Accepted: 04/09/2024] [Indexed: 04/25/2024]
Abstract
We aimed to investigate the relationship between superoxide dismutase 2-related oxidative stress in the paraspinal muscles and spinal alignment, clinical skeletal muscle parameters, and mitochondrial function. Multifidus muscle samples from patients who underwent posterior lumbar surgery were analyzed. Patients with diseases affecting oxidative stress and spinal alignment were excluded. The superoxide dismutase 2 redox index was defined as the ratio of reactive oxygen species (superoxide) to antioxidant enzymes (superoxide dismutase 2) and was used as an index of oxidative stress. Patients were divided into two groups based on the superoxide dismutase 2 redox index. Spinal alignment, clinical skeletal muscle parameters, and succinic dehydrogenase (SDH) mean grayscale value were compared between the groups, with analyzes for both sexes. Multiple regression analyzes were used to adjust for the confounding effect of age on variables showing a significant difference between the two groups. Thirty-five patients with lumbar degenerative diseases were included. No significant differences were observed between the two groups for any of the parameters in males; however, females with a higher superoxide dismutase 2 redox index had greater lumbar lordosis, lower grip strength, and higher SDH mean grayscale value than those with a lower index. Multiple regression analyzes revealed that the superoxide dismutase 2 redox index was an independent explanatory variable for lumbar lordosis, grip strength, and SDH mean grayscale value in female patients. In conclusion, superoxide dismutase 2-related oxidative stress in the paraspinal muscles was associated with mitochondrial dysfunction and decreased grip strength in female lumbar degenerative disease patients.
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Affiliation(s)
- Ryosuke Takahashi
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
| | - Hidetoshi Nojiri
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
| | - Yukoh Ohara
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
- Department of Neurosurgery, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Toshiyuki Fujiwara
- Department of Rehabilitation Medicine, Juntendo University Graduate School of Medicine, Tokyo, Japan
| | - Muneaki Ishijima
- Department of Medicine for Orthopaedics and Motor Organ, Juntendo University Graduate School of Medicine, Tokyo, Japan
- Department of Orthopaedics, Juntendo University School of Medicine, Tokyo, Japan
- Spine and Spinal Cord Center, Juntendo University Hospital, Tokyo, Japan
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Xuekelati S, Maimaitiwusiman Z, Bai X, Xiang H, Li Y, Wang H. Sarcopenia is associated with hypomethylation of TWEAK and increased plasma levels of TWEAK and its downstream inflammatory factor TNF-α in older adults: A case-control study. Exp Gerontol 2024; 188:112390. [PMID: 38437928 DOI: 10.1016/j.exger.2024.112390] [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: 12/25/2023] [Revised: 02/25/2024] [Accepted: 03/01/2024] [Indexed: 03/06/2024]
Abstract
BACKGROUND Sarcopenia is a harmful condition common among older adults for which no treatment is available. Tumor necrosis factor (TNF)-like weak inducer of apoptosis (TWEAK) and its receptor fibroblast growth factor inducible 14 (FN14) are known to play important roles in the pathogenesis of sarcopenia. This study investigated alterations in methylation in TWEAK and Fn14 to identify potential targets for the managing sarcopenia. MATERIALS AND METHODS Through an epidemiological investigation, we detected methylation of CpG islands (CpGs) in TWEAK and Fn14 in community-dwelling older adult of Xinjiang by bisulfite sequencing. Significant CpGs associated with sarcopenia were selected for detection in 152 older individuals by pyrosequencing. Associations between CpG methylation, plasma inflammatory marker levels, and sarcopenia were analyzed. RESULTS Of 38 CpGs in TWEAK and 30 CpGs in Fn14 detected in 60 individuals, 6 CpGs showed lower methylation in sarcopenia patients compared with control individuals. In 152 older adults, covariance analysis with adjustment for age, gender, triglyceride level, obesity, diabetes, and hypertension showed that the methylation levels of 6 CpGs (CpG8, CpG12, CpG13, CpG20 and CpG21of TWEAK, and CpG24 of Fn14) were significantly lower in sarcopenia patients than in control individuals. With adjustment for additional confounding factors, covariate variance analysis showed that plasma TWEAK, TNF-α and IL-10 levels in the sarcopenia group were significant higher than those in the control group (P = 0.007, P < 0.001, P = 0.003). Multivariate logistic regression analysis showed that CpG8, CpG13, CpG21, and total methylation of TWEAK (OR = 0.767, 95 % CI = 0.622-0.947; OR = 0.740, 95 % CI = 0.583-0.941; OR = 0.734, 95 % CI = 0.561-0.958; OR = 0.883, 95 % CI = 0.795-0.980) as well as CpG22 and total methylation of Fn14 were significantly associated with sarcopenia (OR = 826, 95 % CI = 0.704-0.968; OR = 0.918, 95 % CI = 0.852-0.989). From partial correlation analysis, plasma TWEAK was correlated with plasma TNF-α (r = 0.172, P = 0.042). CONCLUSION Sarcopenia is associated with hypomethylation of TWEAK and increased plasma levels of TWEAK and its downstream inflammatory factor TNF-α in a community-dwelling population of older adults in Xinjiang.
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Affiliation(s)
- Saiyare Xuekelati
- Second Department of Comprehensive Internal Medicine of People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - Zhuoya Maimaitiwusiman
- Second Department of Comprehensive Internal Medicine of People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - Xue Bai
- Second Department of Comprehensive Internal Medicine of People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - Hong Xiang
- Second Department of Comprehensive Internal Medicine of People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - Yangjing Li
- Second Department of Comprehensive Internal Medicine of People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China
| | - Hongmei Wang
- Second Department of Comprehensive Internal Medicine of People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, China.
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Zheng Y, Gibb AA, Xu H, Liu S, Hill BG. The metabolic state of the heart regulates mitochondrial supercomplex abundance in mice. Redox Biol 2023; 63:102740. [PMID: 37210780 DOI: 10.1016/j.redox.2023.102740] [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: 04/27/2023] [Accepted: 05/10/2023] [Indexed: 05/23/2023] Open
Abstract
Mitochondrial supercomplexes are observed in mammalian tissues with high energy demand and may influence metabolism and redox signaling. Nevertheless, the mechanisms that regulate supercomplex abundance remain unclear. In this study, we examined the composition of supercomplexes derived from murine cardiac mitochondria and determined how their abundance changes with substrate provision or by genetically induced changes to the cardiac glucose-fatty acid cycle. Protein complexes from digitonin-solubilized cardiac mitochondria were resolved by blue-native polyacrylamide gel electrophoresis and were identified by mass spectrometry and immunoblotting to contain constituents of Complexes I, III, IV, and V as well as accessory proteins involved in supercomplex assembly and stability, cristae architecture, carbohydrate and fat oxidation, and oxidant detoxification. Respiratory analysis of high molecular mass supercomplexes confirmed the presence of intact respirasomes, capable of transferring electrons from NADH to O2. Provision of respiratory substrates to isolated mitochondria augmented supercomplex abundance, with fatty acyl substrate (octanoylcarnitine) promoting higher supercomplex abundance than carbohydrate-derived substrate (pyruvate). Mitochondria isolated from transgenic hearts that express kinase-deficient 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (GlycoLo), which decreases glucose utilization and increases reliance on fatty acid oxidation for energy, had higher mitochondrial supercomplex abundance and activity compared with mitochondria from wild-type or phosphatase-deficient 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase-expressing hearts (GlycoHi), the latter of which encourages reliance on glucose catabolism for energy. These findings indicate that high energetic reliance on fatty acid catabolism bolsters levels of mitochondrial supercomplexes, supporting the idea that the energetic state of the heart is regulatory factor in supercomplex assembly or stability.
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Affiliation(s)
- Yuting Zheng
- Center for Cardiometabolic Science, Christina Lee Brown Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Andrew A Gibb
- Cardiovascular Research Center, Department of Cardiovascular Sciences, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, 19140, USA
| | - Hongkai Xu
- Center of Proteomic Analysis, Beijing Genomics Institute (BGI-Shenzhen), Shenzhen, 518000, China
| | - Siqi Liu
- Center of Proteomic Analysis, Beijing Genomics Institute (BGI-Shenzhen), Shenzhen, 518000, China
| | - Bradford G Hill
- Center for Cardiometabolic Science, Christina Lee Brown Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA.
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Xu X, Talifu Z, Zhang CJ, Gao F, Ke H, Pan YZ, Gong H, Du HY, Yu Y, Jing YL, Du LJ, Li JJ, Yang DG. Mechanism of skeletal muscle atrophy after spinal cord injury: A narrative review. Front Nutr 2023; 10:1099143. [PMID: 36937344 PMCID: PMC10020380 DOI: 10.3389/fnut.2023.1099143] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 02/20/2023] [Indexed: 03/06/2023] Open
Abstract
Spinal cord injury leads to loss of innervation of skeletal muscle, decreased motor function, and significantly reduced load on skeletal muscle, resulting in atrophy. Factors such as braking, hormone level fluctuation, inflammation, and oxidative stress damage accelerate skeletal muscle atrophy. The atrophy process can result in skeletal muscle cell apoptosis, protein degradation, fat deposition, and other pathophysiological changes. Skeletal muscle atrophy not only hinders the recovery of motor function but is also closely related to many systemic dysfunctions, affecting the prognosis of patients with spinal cord injury. Extensive research on the mechanism of skeletal muscle atrophy and intervention at the molecular level has shown that inflammation and oxidative stress injury are the main mechanisms of skeletal muscle atrophy after spinal cord injury and that multiple pathways are involved. These may become targets of future clinical intervention. However, most of the experimental studies are still at the basic research stage and still have some limitations in clinical application, and most of the clinical treatments are focused on rehabilitation training, so how to develop more efficient interventions in clinical treatment still needs to be further explored. Therefore, this review focuses mainly on the mechanisms of skeletal muscle atrophy after spinal cord injury and summarizes the cytokines and signaling pathways associated with skeletal muscle atrophy in recent studies, hoping to provide new therapeutic ideas for future clinical work.
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Affiliation(s)
- Xin Xu
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Zuliyaer Talifu
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, Shandong, China
| | - Chun-Jia Zhang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Feng Gao
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Han Ke
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, Shandong, China
| | - Yun-Zhu Pan
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, Shandong, China
| | - Han Gong
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Hua-Yong Du
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Yan Yu
- School of Rehabilitation, Capital Medical University, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Ying-Li Jing
- School of Rehabilitation, Capital Medical University, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Liang-Jie Du
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Jian-Jun Li
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
- School of Rehabilitation Sciences and Engineering, University of Health and Rehabilitation Sciences, Qingdao, Shandong, China
- *Correspondence: Jian-Jun Li
| | - De-Gang Yang
- School of Rehabilitation, Capital Medical University, Beijing, China
- Department of Spinal and Neural Functional Reconstruction, China Rehabilitation Research Center, Beijing, China
- Chinese Institute of Rehabilitation Science, Beijing, China
- Center of Neural Injury and Repair, Beijing Institute for Brain Disorders, Beijing, China
- Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
- De-Gang Yang
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da Silva MT, Joshi AS, Koike TE, Roy A, Mathukumalli K, Sopariwala DH, Narkar VA, Kumar A. Targeted ablation of Fn14 receptor improves exercise capacity and inhibits neurogenic muscle atrophy. FASEB J 2022; 36:e22666. [PMID: 36412933 PMCID: PMC10587854 DOI: 10.1096/fj.202201583r] [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: 09/30/2022] [Revised: 11/03/2022] [Accepted: 11/09/2022] [Indexed: 11/23/2022]
Abstract
Skeletal muscle atrophy is a prevalent complication in multiple chronic diseases and disuse conditions. Fibroblast growth factor-inducible 14 (Fn14) is a member of the TNF receptor superfamily and a bona fide receptor of the TWEAK cytokine. Accumulating evidence suggests that Fn14 levels are increased in catabolic conditions as well as during exercise. However, the role of Fn14 in the regulation of skeletal muscle mass and function remains poorly understood. In this study, through the generation of novel skeletal muscle-specific Fn14-knockout mice, we have investigated the muscle role of Fn14 in the regulation of exercise capacity and denervation-induced muscle atrophy. Our results demonstrate that there was no difference in skeletal muscle mass between control and muscle-specific Fn14-knockout mice. Nevertheless, the deletion of Fn14 in skeletal muscle significantly improved exercise capacity and resistance to fatigue. This effect of Fn14 deletion is associated with an increased proportion of oxidative myofibers and higher capillaries number per myofiber in skeletal muscle. Furthermore, our results demonstrate that targeted deletion of Fn14 inhibits denervation-induced muscle atrophy in adult mice. Deletion of Fn14 reduced the expression of components of the ubiquitin-proteasome system and non-canonical NF-kappa B signaling in denervated skeletal muscle, as well as increased the phosphorylation of Akt kinase and FoxO3a transcription factor. Collectively, our results demonstrate that targeted inhibition of Fn14 improves exercise tolerance and inhibits denervation-induced muscle atrophy in adult mice.
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Affiliation(s)
- Meiricris Tomaz da Silva
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston College of Pharmacy, Houston, TX 77204, USA
| | - Aniket S. Joshi
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston College of Pharmacy, Houston, TX 77204, USA
| | - Tatiana E. Koike
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston College of Pharmacy, Houston, TX 77204, USA
| | - Anirban Roy
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston College of Pharmacy, Houston, TX 77204, USA
| | - Kavya Mathukumalli
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston College of Pharmacy, Houston, TX 77204, USA
| | - Danesh H. Sopariwala
- Brown Foundation Institute of Molecular Medicine, McGovern Medical School at The University of Texas Health Science Center (UTHealth), Houston, TX, USA
| | - Vihang A. Narkar
- Brown Foundation Institute of Molecular Medicine, McGovern Medical School at The University of Texas Health Science Center (UTHealth), Houston, TX, USA
| | - Ashok Kumar
- Department of Pharmacological and Pharmaceutical Sciences, University of Houston College of Pharmacy, Houston, TX 77204, USA
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Sato R, Vatic M, da Fonseca GWP, von Haehling S. Sarcopenia and Frailty in Heart Failure: Is There a Biomarker Signature? Curr Heart Fail Rep 2022; 19:400-411. [PMID: 36261756 DOI: 10.1007/s11897-022-00575-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/10/2022] [Indexed: 10/24/2022]
Abstract
PURPOSE OF REVIEW Sarcopenia and frailty are common in patients with heart failure (HF) and are strongly associated with prognosis. This review aims to examine promising biomarkers that can guide physicians in identifying sarcopenia and frailty in HF. RECENT FINDINGS Traditional biomarkers including C-reactive protein, aminotransaminase, myostatin, and urinary creatinine as well as novel biomarkers including microRNAs, suppression of tumorigenicity 2 (ST2), galectin-3, and procollagen type III N-terminal peptide may help in predicting the development of sarcopenia and frailty in HF patients. Among those biomarkers, aminotransferase, urinary creatinine, and ST2 predicted the prognosis in HF patients with sarcopenia and frailty. This review outlines the current knowledge of biomarkers that are considered promising for diagnosing sarcopenia and frailty in HF. The listed biomarkers might support the diagnosis, prognosis, and therapeutic decisions for sarcopenia and frailty in HF patients.
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Affiliation(s)
- Ryosuke Sato
- Department of Cardiology and Pneumology, University of Göttingen Medical Center, Robert-Koch-Str. 40, 37075, Gottingen, Germany
| | - Mirela Vatic
- Department of Cardiology and Pneumology, University of Göttingen Medical Center, Robert-Koch-Str. 40, 37075, Gottingen, Germany
| | | | - Stephan von Haehling
- German Center for Cardiovascular Research (DZHK), Partner Site Göttingen, Gottingen, Germany.
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7
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Fulghum K, Collins HE, Jones SP, Hill BG. Influence of biological sex and exercise on murine cardiac metabolism. JOURNAL OF SPORT AND HEALTH SCIENCE 2022; 11:479-494. [PMID: 35688382 PMCID: PMC9338340 DOI: 10.1016/j.jshs.2022.06.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2022] [Revised: 04/07/2022] [Accepted: 04/27/2022] [Indexed: 05/03/2023]
Abstract
Although the structural and functional effects of exercise on the heart are well established, the metabolic changes that occur in the heart during and after exercise remain unclear. In this study, we used metabolomics to assess time-dependent changes in the murine cardiac metabolome following 1 session of treadmill exercise. After the exercise bout, we also recorded blood lactate, glucose, and ketone body levels and measured cardiac mitochondrial respiration. In both male and female mice, moderate- and high-intensity exercise acutely increased blood lactate levels. In both sexes, low- and moderate-intensity exercise augmented circulating 3-hydroxybutryrate levels immediately after the exercise bout; however, only in female mice did high-intensity exercise increase 3-hydroxybutyrate levels, with significant increases occurring 1 h after the exercise session. Untargeted metabolomics analyses of sedentary female and male hearts suggest considerable sex-dependent differences in basal cardiac metabolite levels, with female hearts characterized by higher levels of pantothenate, pyridoxamine, homoarginine, tryptophan, and several glycerophospholipid and sphingomyelin species and lower levels of numerous metabolites, including acetyl coenzyme A, glucuronate, gulonate, hydroxyproline, prolyl-hydroxyproline, carnosine, anserine, and carnitinylated and glycinated species, as compared with male hearts. Immediately after a bout of treadmill exercise, both male and female hearts had higher levels of corticosterone; however, female mice showed more extensive exercise-induced changes in the cardiac metabolome, characterized by significant, time-dependent changes in amino acids (e.g., serine, alanine, tyrosine, tryptophan, branched-chain amino acids) and the ketone body 3-hydroxybutyrate. Results from experiments using isolated cardiac mitochondria suggest that high-intensity treadmill exercise does not acutely affect respiration or mitochondrial coupling; however, female cardiac mitochondria demonstrate generally higher adenosine diphosphate sensitivity compared with male cardiac mitochondria. Collectively, these findings in mice reveal key sex-dependent differences in cardiac metabolism and suggest that the metabolic network in the female heart is more responsive to physiological stress caused by exercise.
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Affiliation(s)
- Kyle Fulghum
- Diabetes and Obesity Center, Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY 40202, USA; Department of Physiology, University of Louisville, Louisville, KY 40202, USA
| | - Helen E Collins
- Diabetes and Obesity Center, Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY 40202, USA
| | - Steven P Jones
- Diabetes and Obesity Center, Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY 40202, USA
| | - Bradford G Hill
- Diabetes and Obesity Center, Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, University of Louisville, Louisville, KY 40202, USA.
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8
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Drummer DJ, McAdam JS, Seay R, Aban I, Lavin KM, Wiggins D, Touliatos G, Yang S, Kelley C, Tuggle SC, Peoples B, Siegel H, Ghanem E, Singh JA, Schutzler S, Barnes CL, Ferrando AA, Bridges SL, Bamman MM. Perioperative assessment of muscle inflammation susceptibility in patients with end-stage osteoarthritis. J Appl Physiol (1985) 2022; 132:984-994. [PMID: 35238652 PMCID: PMC8993516 DOI: 10.1152/japplphysiol.00428.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 02/22/2022] [Accepted: 02/28/2022] [Indexed: 11/22/2022] Open
Abstract
Many individuals with end-stage osteoarthritis (OA) undergo elective total hip/knee arthroplasty (THA/TKA) to relieve pain, improve mobility and quality of life. However, ∼30% suffer long-term mobility impairment following surgery. This may be in part due to muscle inflammation susceptibility (MuIS+), an overt proinflammatory pathology localized to skeletal muscle surrounding the diseased joint, present in some patients with TKA/THA. We interrogated the hypothesis that MuIS+ status results in a perturbed perioperative gene expression profile and decreases skeletal muscle integrity in patients with end-stage OA. Samples were leveraged from the two-site, randomized, controlled trial R01HD084124, NCT02628795. Participants were dichotomized based on surgical (SX) muscle gene expression of TNFRSF1A (TNF-αR). MuIS+/- samples were probed for gene expression and fibrosis. Paired and independent two-tailed t tests were used to determine differences between contralateral (CTRL) and surgical (SX) limbs and between-subject comparisons, respectively. Significance was declared at P < 0.05. Seventy participants (26M/44F; mean age 62.41 ± 8.86 yr; mean body mass index 31.10 ± 4.91 kg/m2) undergoing THA/TKA were clustered as MuIS+ (n = 24) or MuIS- (n = 46). Lower skeletal muscle integrity (greater fibrosis) exists on the SX versus CTRL limb (P < 0.001). Furthermore, MuIS+ versus MuIS- muscle exhibited higher proinflammatory (IL-6R and TNF-α) and catabolic (TRIM63) gene expression (P < 0.001, P = 0.004, and 0.024 respectively), with a trend for greater fibrosis (P = 0.087). Patients with MuIS+ exhibit more inflammation and catabolic gene expression in skeletal muscle of the SX limb, accompanied by decreased skeletal muscle integrity (Trend). This highlights the impact of MuIS+ status emphasizing the potential value of perioperative MuIS assessment to inform optimal postsurgical care.NEW & NOTEWORTHY This study assessed the skeletal muscle molecular characteristics associated with end-stage osteoarthritis and refined an important phenotype, in some patients, termed muscle inflammation susceptibility (MuIS+) that may be an important consideration following surgery. Furthermore, we provide evidence of differential inflammatory and catabolic gene expression between the contralateral and surgical limbs along with differences between the skeletal muscle surrounding the diseased hip versus knee joints.
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Affiliation(s)
- Devin J Drummer
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jeremy S McAdam
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
- Florida Institute for Human and Machine Cognition, Pensacola, Florida
| | - Regina Seay
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
| | - Inmaculada Aban
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama
| | - Kaleen M Lavin
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
- Florida Institute for Human and Machine Cognition, Pensacola, Florida
| | - Derek Wiggins
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Gabriel Touliatos
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Sufen Yang
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Christian Kelley
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - S Craig Tuggle
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
- Florida Institute for Human and Machine Cognition, Pensacola, Florida
| | - Brandon Peoples
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Herrick Siegel
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Orthopaedic Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Elie Ghanem
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Orthopaedic Surgery, University of Alabama at Birmingham, Birmingham, Alabama
| | - Jasvinder A Singh
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Birmingham Veterans Affairs Medical Center, Birmingham, Alabama
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Comprehensive Arthritis, Musculoskeletal, Bone, and Autoimmunity Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Scott Schutzler
- Department of Geriatrics and Center for Translational Research in Aging and Longevity, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - C Lowry Barnes
- Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Arny A Ferrando
- Department of Geriatrics and Center for Translational Research in Aging and Longevity, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - S Louis Bridges
- Department of Medicine, Hospital for Special Surgery, New York, New York
- Division of Rheumatology, Weill Cornell Medical Center, New York, New York
| | - Marcas M Bamman
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama
- Department of Cell, Developmental, and Integrative Biology, University of Alabama at Birmingham, Birmingham, Alabama
- Florida Institute for Human and Machine Cognition, Pensacola, Florida
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9
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So HK, Kim S, Kang JS, Lee SJ. Role of Protein Arginine Methyltransferases and Inflammation in Muscle Pathophysiology. Front Physiol 2021; 12:712389. [PMID: 34489731 PMCID: PMC8416770 DOI: 10.3389/fphys.2021.712389] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/27/2021] [Indexed: 12/17/2022] Open
Abstract
Arginine methylation mediated by protein arginine methyltransferases (PRMTs) is a post-translational modification of both histone and non-histone substrates related to diverse biological processes. PRMTs appear to be critical regulators in skeletal muscle physiology, including regeneration, metabolic homeostasis, and plasticity. Chronic inflammation is commonly associated with the decline of skeletal muscle mass and strength related to aging or chronic diseases, defined as sarcopenia. In turn, declined skeletal muscle mass and strength can exacerbate chronic inflammation. Thus, understanding the molecular regulatory pathway underlying the crosstalk between skeletal muscle function and inflammation might be essential for the intervention of muscle pathophysiology. In this review, we will address the current knowledge on the role of PRMTs in skeletal muscle physiology and pathophysiology with a specific emphasis on its relationship with inflammation.
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Affiliation(s)
- Hyun-Kyung So
- Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University School of Medicine, Suwon, South Korea.,Research Institute of Aging-Related Disease, AniMusCure Inc., Suwon, South Korea
| | - Sunghee Kim
- Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University School of Medicine, Suwon, South Korea
| | - Jong-Sun Kang
- Molecular Cell Biology, Single Cell Network Research Center, Sungkyunkwan University School of Medicine, Suwon, South Korea
| | - Sang-Jin Lee
- Research Institute of Aging-Related Disease, AniMusCure Inc., Suwon, South Korea
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10
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Xue L, Zhang Y, Xu J, Lu W, Wang Q, Fu J, Liu Z. Anti-TWEAK Antibody Alleviates Renal Interstitial Fibrosis by Increasing PGC-1α Expression in Lupus Nephritis. J Inflamm Res 2021; 14:1173-1184. [PMID: 33814923 PMCID: PMC8009537 DOI: 10.2147/jir.s301356] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/11/2021] [Indexed: 12/26/2022] Open
Abstract
Purpose Current studies on the mechanism of tumor necrosis factor-like weak inducer of apoptosis (TWEAK) in lupus nephritis (LN) mainly focus on the inflammatory pathway. Herein, we aimed to determine whether TWEAK could promote the progression of renal interstitial fibrosis by regulating peroxisome proliferator-activated receptor-gamma coactivator-1α (PGC-1α) expression and intervening in lipid metabolism in LN. Materials and Methods MRL/lpr mice, an animal model of lupus, were treated with the anti-TWEAK antibody or co-treated with adeno-associated virus-mediated PGC-1α short hairpin RNA (shRNA). In addition, human proximal tubular epithelial cells (HK2 cells) were treated with recombinant human TWEAK (rhTWEAK) or ammonium pyrrolidine dithiocarbamate (PDTC) in vitro. Results The renal contents of free fatty acids and triglycerides were higher in MRL/lpr mice than in MRL/MpJ mice; however, these contents were decreased by treatment with the anti-TWEAK antibody. Based on immunofluorescence staining, the expression of PGC-1α was markedly more in the renal tubules of MRL/MpJ mice than in the glomeruli. However, treatment with anti-TWEAK antibody increased the levels of PGC-1α and its downstream target genes, which were remarkably lower in MRL/lpr mice than in MRL/MpJ mice. Anti-TWEAK antibody effectively eased renal interstitial fibrosis, which manifested as a decrease in the deposition of collagen fibers and the inhibition of type I collagen and fibronectin expression. However, the therapeutic effects of the anti-TWEAK antibody were abolished by PGC-1α shRNA. Treatment with rhTWEAK decreased PGC-1α expression in both dose- and time-dependent manners in HK2 cells in vitro. PDTC, an inhibitor of IκBα phosphorylation, suppressed the decrease in the PGC-1α protein level induced by rhTWEAK treatment. Conclusion Our results suggest that TWEAK prevents renal tubular PGC-1α expression by promoting NF-κB activation, resulting in a deficiency in lipid metabolism and the progress of renal interstitial fibrosis. The upregulation of renal tubular PGC-1α expression to improve lipid metabolism is one of the mechanisms employed by the anti-TWEAK antibody to treat renal interstitial fibrosis.
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Affiliation(s)
- Leixi Xue
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Yi Zhang
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Jiajun Xu
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Wentian Lu
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Qing Wang
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Jinxiang Fu
- Department of Hematology, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
| | - Zhichun Liu
- Department of Rheumatology and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, People's Republic of China
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11
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Faitg J, Leduc-Gaudet JP, Reynaud O, Ferland G, Gaudreau P, Gouspillou G. Effects of Aging and Caloric Restriction on Fiber Type Composition, Mitochondrial Morphology and Dynamics in Rat Oxidative and Glycolytic Muscles. Front Physiol 2019; 10:420. [PMID: 31114501 PMCID: PMC6503296 DOI: 10.3389/fphys.2019.00420] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/27/2019] [Indexed: 12/22/2022] Open
Abstract
Aging is associated with a progressive decline in muscle mass and strength, a process known as sarcopenia. Evidence indicates that mitochondrial dysfunction plays a causal role in sarcopenia and suggests that alterations in mitochondrial dynamics/morphology may represent an underlying mechanism. Caloric restriction (CR) is among the most efficient nonpharmacological interventions to attenuate sarcopenia in rodents and is thought to exert its beneficial effects by improving mitochondrial function. However, CR effects on mitochondrial morphology and dynamics, especially in aging muscle, remain unknown. To address this issue, we investigated mitochondrial morphology and dynamics in the oxidative soleus (SOL) and glycolytic white gastrocnemius (WG) muscles of adult (9-month-old) ad libitum-fed (AL; A-AL), old (22-month-old) AL-fed (O-AL), and old CR (O-CR) rats. We show that CR attenuates the aging-related decline in the muscle-to-body-weight ratio, a sarcopenic index. CR also prevented the effects of aging on muscle fiber type composition in both muscles. With aging, the SOL displayed fragmented SubSarcolemmal (SS) and InterMyoFibrillar (IMF) mitochondria, an effect attenuated by CR. Aged WG displayed enlarged SS and more complex/branched IMF mitochondria. CR had marginal anti-aging effects on WG mitochondrial morphology. In the SOL, DRP1 (pro-fission protein) content was higher in O-AL vs YA-AL, and Mfn2 (pro-fusion) content was higher in O-CR vs A-AL. In the gastrocnemius, Mfn2, Drp1, and Fis1 (pro-fission) contents were higher in O-AL vs A-AL. CR reduced this aging-related increase in Mfn2 and Fis1 content. Overall, these results reveal for the first time that aging differentially impacts mitochondrial morphology and dynamics in different muscle fiber types, by increasing fission/fragmentation in oxidative fibers while enhancing mitochondrial size and branching in glycolytic fibers. Our results also indicate that although CR partially attenuates aging-related changes in mitochondrial dynamics in glycolytic fibers, its anti-aging effect on mitochondrial morphology is restricted to oxidative fibers.
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Affiliation(s)
- Julie Faitg
- Département de Biologie, Faculté des Sciences, UQAM, Montreal, QC, Canada.,Groupe de recherche en Activité Physique Adaptée, Montreal, QC, Canada
| | - Jean-Philippe Leduc-Gaudet
- Groupe de recherche en Activité Physique Adaptée, Montreal, QC, Canada.,Meakins-Christie Laboratories, Department of Medicine and Division of Experimental Medicine, McGill University, Montreal, QC, Canada.,Département des sciences de l'activité physique, Faculté des Sciences, UQAM, Montreal, QC, Canada
| | - Olivier Reynaud
- Groupe de recherche en Activité Physique Adaptée, Montreal, QC, Canada.,Département des sciences de l'activité physique, Faculté des Sciences, UQAM, Montreal, QC, Canada
| | - Guylaine Ferland
- Institut de cardiologie de Montréal Research Center, Montreal, QC, Canada.,Department of Nutrition, University of Montreal, Montreal, QC, Canada
| | - Pierrette Gaudreau
- Laboratory of Neuroendocrinology of Aging, Centre Hospitalier de l'Université de Montréal Research Center (CRCHUM), Montreal, QC, Canada.,Department of Medicine,University of Montreal, Montreal, QC, Canada
| | - Gilles Gouspillou
- Groupe de recherche en Activité Physique Adaptée, Montreal, QC, Canada.,Centre de Recherche de l'Institut Universitaire de Gériatrie de Montréal, Montreal, QC, Canada
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12
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Yaghoob Nezhad F, Verbrugge SAJ, Schönfelder M, Becker L, Hrabě de Angelis M, Wackerhage H. Genes Whose Gain or Loss-of-Function Increases Endurance Performance in Mice: A Systematic Literature Review. Front Physiol 2019; 10:262. [PMID: 30967789 PMCID: PMC6439621 DOI: 10.3389/fphys.2019.00262] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/28/2019] [Indexed: 01/23/2023] Open
Abstract
Endurance is not only a key factor in many sports but endurance-related variables are also associated with good health and low mortality. Twin and family studies suggest that several endurance-associated traits are ≈50% inherited. However, we still poorly understand what DNA sequence variants contribute to endurance heritability. To address this issue, we conducted a systematic review to identify genes whose experimental loss or gain-of-function increases endurance capacity in mice. We found 31 genes including two isoforms of Ppargc1a whose manipulation increases running or swimming endurance performance by up to 1800%. Genes whose gain-of-function increases endurance are Adcy5, Adcy8, Hk2, Il15, Mef2c, Nr4a3, Pck1 (Pepck), Ppard, Ppargc1a (both the a and b isoforms of the protein Pgc-1α), Ppargc1b, Ppp3ca (calcineurin), Scd1, Slc5a7, Tfe3, Tfeb, Trib3 & Trpv1. Genes whose loss-of-function increases endurance in mice are Actn3, Adrb2, Bdkrb2, Cd47, Crym, Hif1a, Myoz1, Pappa, Pknox1, Pten, Sirt4, Thbs1, Thra, and Tnfsf12. Of these genes, human DNA sequence variants of ACTN3, ADCY5, ADRB2, BDKRB2, HIF1A, PPARD, PPARGC1A, PPARGC1B, and PPP3CA are also associated with endurance capacity and/or VO2max trainability suggesting evolutionary conservation between mice and humans. Bioinformatical analyses show that there are numerous amino acid or copy number-changing DNA variants of endurance genes in humans, suggesting that genetic variation of endurance genes contributes to the variation of human endurance capacity, too. Moreover, several of these genes/proteins change their expression or phosphorylation in skeletal muscle or the heart after endurance exercise, suggesting a role in the adaptation to endurance exercise.
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Affiliation(s)
- Fakhreddin Yaghoob Nezhad
- Exercise Biology Group, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Sander A J Verbrugge
- Exercise Biology Group, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Martin Schönfelder
- Exercise Biology Group, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
| | - Lore Becker
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - Martin Hrabě de Angelis
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg, Germany.,Chair of Experimental Genetics, School of Life Sciences Weihenstephan, Technical University of Munich, Freising, Germany.,German Center for Diabetes Research, Neuherberg, Germany
| | - Henning Wackerhage
- Exercise Biology Group, Department of Sport and Health Sciences, Technical University of Munich, Munich, Germany
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13
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Fulghum KL, Rood BR, Shang VO, McNally LA, Riggs DW, Zheng YT, Hill BG. Mitochondria-associated lactate dehydrogenase is not a biologically significant contributor to bioenergetic function in murine striated muscle. Redox Biol 2019; 24:101177. [PMID: 30939431 PMCID: PMC6441728 DOI: 10.1016/j.redox.2019.101177] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 03/08/2019] [Accepted: 03/21/2019] [Indexed: 12/17/2022] Open
Abstract
Previous studies indicate that mitochondria-localized lactate dehydrogenase (mLDH) might be a significant contributor to metabolism. In the heart, the presence of mLDH could provide cardiac mitochondria with a higher capacity to generate reducing equivalents directly available for respiration, especially during exercise when circulating lactate levels are high. The purpose of this study was to test the hypothesis that mLDH contributes to striated muscle bioenergetic function. Mitochondria isolated from murine cardiac and skeletal muscle lacked an appreciable ability to respire on lactate in the absence or presence of exogenous NAD+. Although three weeks of treadmill running promoted physiologic cardiac growth, mitochondria isolated from the hearts of acutely exercised or exercise-adapted mice showed no further increase in lactate oxidation capacity. In all conditions tested, cardiac mitochondria respired at >20-fold higher levels with provision of pyruvate compared with lactate. Similarly, skeletal muscle mitochondria showed little capacity to respire on lactate. Protease protection assays of isolated cardiac mitochondria confirmed that LDH is not localized within the mitochondrion. We conclude that mLDH does not contribute to cardiac bioenergetics in mice.
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Affiliation(s)
- Kyle L Fulghum
- Diabetes and Obesity Center, Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA; Department of Physiology and Biophysics, University of Louisville, Louisville, KY, USA
| | - Benjamin R Rood
- Diabetes and Obesity Center, Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Velma O Shang
- Diabetes and Obesity Center, Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA; Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, KY, USA
| | - Lindsey A McNally
- Diabetes and Obesity Center, Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Daniel W Riggs
- Diabetes and Obesity Center, Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA; Department of Bioinformatics and Biostatistics, University of Louisville, Louisville, KY, USA
| | - Yu-Ting Zheng
- Diabetes and Obesity Center, Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA
| | - Bradford G Hill
- Diabetes and Obesity Center, Envirome Institute, Department of Medicine, University of Louisville, Louisville, KY, USA; Department of Physiology and Biophysics, University of Louisville, Louisville, KY, USA; Department of Biochemistry and Molecular Genetics, University of Louisville, Louisville, KY, USA.
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14
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Hindi SM, Sato S, Xiong G, Bohnert KR, Gibb AA, Gallot YS, McMillan JD, Hill BG, Uchida S, Kumar A. TAK1 regulates skeletal muscle mass and mitochondrial function. JCI Insight 2018; 3:98441. [PMID: 29415881 DOI: 10.1172/jci.insight.98441] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Accepted: 01/04/2018] [Indexed: 12/20/2022] Open
Abstract
Skeletal muscle mass is regulated by a complex array of signaling pathways. TGF-β-activated kinase 1 (TAK1) is an important signaling protein, which regulates context-dependent activation of multiple intracellular pathways. However, the role of TAK1 in the regulation of skeletal muscle mass remains unknown. Here, we report that inducible inactivation of TAK1 causes severe muscle wasting, leading to kyphosis, in both young and adult mice.. Inactivation of TAK1 inhibits protein synthesis and induces proteolysis, potentially through upregulating the activity of the ubiquitin-proteasome system and autophagy. Phosphorylation and enzymatic activity of AMPK are increased, whereas levels of phosphorylated mTOR and p38 MAPK are diminished upon inducible inactivation of TAK1 in skeletal muscle. In addition, targeted inactivation of TAK1 leads to the accumulation of dysfunctional mitochondria and oxidative stress in skeletal muscle of adult mice. Inhibition of TAK1 does not attenuate denervation-induced muscle wasting in adult mice. Finally, TAK1 activity is highly upregulated during overload-induced skeletal muscle growth, and inactivation of TAK1 prevents myofiber hypertrophy in response to functional overload. Overall, our study demonstrates that TAK1 is a key regulator of skeletal muscle mass and oxidative metabolism.
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Affiliation(s)
| | - Shuichi Sato
- Department of Anatomical Sciences and Neurobiology
| | | | | | | | | | | | | | - Shizuka Uchida
- Cardiovascular Innovation Institute, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Ashok Kumar
- Department of Anatomical Sciences and Neurobiology
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15
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Alaca N, Uslu S, Gulec Suyen G, Ince U, Serteser M, Kurtel H. Effects of different aerobic exercise frequencies on streptozotocin-nicotinamide-induced type 2 diabetic rats: Continuous versus short bouts and weekend warrior exercises. J Diabetes 2018; 10:73-84. [PMID: 28425181 DOI: 10.1111/1753-0407.12561] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 03/24/2017] [Accepted: 04/14/2017] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Exercise training is known to have multiple beneficial effects on type 2 diabetes mellitus (T2DM). The aim of this study was to explore the effects of aerobic exercise frequency on diabetic parameters, the histopathological structure of skeletal muscle, diabetic myopathy, and mitochondrial enzyme activity in an experimental model of T2DM. METHODS Sprague-Dawley rats (n = 35) were rendered diabetic by injection of nicotinamide (110 mg/kg) and streptozotocin (65 mg/kg). Rats with blood glucose concentrations between 7 and 17 mmol/L were used. Diabetic rats were randomly allocated to one of the following groups: (i) control sedentary; (ii) diabetic sedentary; (iii) diabetic with continuous exercise (30 min/day, 5 days/week); (iv) diabetic with short bouts of exercise (3 × 10 min/day, 5 days/week); and (v) diabetic rats as "weekend warriors" (35 + 40 min/day, 2 days/week). After 6 weeks swimming exercise (total duration 150 min/week), biochemical tests were performed to measure insulin, glucose, cytokines, serum and muscle myeloperoxidase (MPO), and malondialdehyde (MDA) levels. Histologic analysis (histomorphometric and mitochondrial enzyme analysis) was also performed. RESULTS Compared with diabetic sedentary rats, significant improvements were observed in all exercise groups in terms of glucose levels, weight loss, tissue MPO and MDA levels, muscular connective tissue, muscle atrophy, mitochondrial enzyme, and all histomorphometric analyses. CONCLUSIONS The results of the study emphasize the effects of training on inflammation, increased oxidative stress, myopathy, and mitochondrial damage in a rat model of T2DM, and demonstrate that there is no major difference between exercise modalities provided that the total duration of exercise remains the same.
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MESH Headings
- Animals
- Antibiotics, Antineoplastic/toxicity
- Diabetes Mellitus, Experimental/chemically induced
- Diabetes Mellitus, Experimental/pathology
- Diabetes Mellitus, Experimental/therapy
- Diabetes Mellitus, Type 2/chemically induced
- Diabetes Mellitus, Type 2/pathology
- Diabetes Mellitus, Type 2/therapy
- Glucose/metabolism
- Male
- Muscle, Skeletal/physiology
- Niacinamide/toxicity
- Physical Conditioning, Animal
- Rats
- Rats, Sprague-Dawley
- Streptozocin/toxicity
- Swimming
- Vitamin B Complex/toxicity
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Affiliation(s)
- Nuray Alaca
- Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Acibadem University, Istanbul, Turkey
- Department of Physiology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Serap Uslu
- Department of Histology and Embryology, School of Medicine, Medeniyet University, Istanbul, Turkey
| | - Guldal Gulec Suyen
- Department of Physiology, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Umit Ince
- Department of Pathology, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Mustafa Serteser
- Department of Biochemistry, School of Medicine, Acibadem University, Istanbul, Turkey
| | - Hızır Kurtel
- Department of Physiology, School of Medicine, Marmara University, Istanbul, Turkey
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16
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Gallot YS, McMillan JD, Xiong G, Bohnert KR, Straughn AR, Hill BG, Kumar A. Distinct roles of TRAF6 and TAK1 in the regulation of adipocyte survival, thermogenesis program, and high-fat diet-induced obesity. Oncotarget 2017; 8:112565-112583. [PMID: 29348847 PMCID: PMC5762532 DOI: 10.18632/oncotarget.22575] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Accepted: 09/29/2017] [Indexed: 12/25/2022] Open
Abstract
Chronic low-grade inflammation, adipocyte hypertrophy, and glucose intolerance are common features of obesity and a risk factor for cancer. Tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6) is an adaptor protein that also possesses a non-conventional E3 ubiquitin ligase activity. In response to receptor-mediated events, TRAF6 activates transforming growth factor-activated kinase 1 (TAK1), which leads to activation of the MAPK and nuclear factor-kappa B (NF-κB) signaling pathways. However, the roles of TRAF6 and TAK1 in the regulation of adipocyte function remain less understood. Here, we demonstrate that adipocyte-specific deletion of TAK1, but not TRAF6, in mice reduces the survival of adipocytes and abundance of white adipose tissue (WAT). Adipocyte-specific ablation of TAK1, but not TRAF6, increases the expression for markers of beige/brown fat in WAT. Deletion of TAK1 in WAT increases phosphorylation of AMPK, abundance of PGC-1α, non-canonical NF-κB signaling, markers of M2 macrophages, and diminishes phosphorylation of JNK and canonical NF-κB signaling. Levels of TRAF6 and enzymatic activity of TAK1 are increased in WAT of mice fed with high-fat diet (HFD). Our results demonstrate that ablation of TAK1 drastically reduces HFD-induced obesity and improves energy expenditure and glucose metabolism. In contrast, adipocyte-specific ablation of TRAF6 has a minimal effect on HFD-induced obesity. Collectively, our results suggest that even though TRAF6 is an upstream activator of TAK1 in many signaling cascades, inactivation of TAK1, but not TRAF6, regulates adipocyte survival, energy expenditure, and HFD-induced obesity in mice.
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Affiliation(s)
- Yann S Gallot
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Joseph D McMillan
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Guangyan Xiong
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Kyle R Bohnert
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Alex R Straughn
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Bradford G Hill
- Diabetes and Obesity Center, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
| | - Ashok Kumar
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky 40202, USA
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17
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Gibb AA, Epstein PN, Uchida S, Zheng Y, McNally LA, Obal D, Katragadda K, Trainor P, Conklin DJ, Brittian KR, Tseng MT, Wang J, Jones SP, Bhatnagar A, Hill BG. Exercise-Induced Changes in Glucose Metabolism Promote Physiological Cardiac Growth. Circulation 2017; 136:2144-2157. [PMID: 28860122 PMCID: PMC5704654 DOI: 10.1161/circulationaha.117.028274] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 08/25/2017] [Indexed: 12/15/2022]
Abstract
Supplemental Digital Content is available in the text. Background: Exercise promotes metabolic remodeling in the heart, which is associated with physiological cardiac growth; however, it is not known whether or how physical activity–induced changes in cardiac metabolism cause myocardial remodeling. In this study, we tested whether exercise-mediated changes in cardiomyocyte glucose metabolism are important for physiological cardiac growth. Methods: We used radiometric, immunologic, metabolomic, and biochemical assays to measure changes in myocardial glucose metabolism in mice subjected to acute and chronic treadmill exercise. To assess the relevance of changes in glycolytic activity, we determined how cardiac-specific expression of mutant forms of 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase affect cardiac structure, function, metabolism, and gene programs relevant to cardiac remodeling. Metabolomic and transcriptomic screenings were used to identify metabolic pathways and gene sets regulated by glycolytic activity in the heart. Results: Exercise acutely decreased glucose utilization via glycolysis by modulating circulating substrates and reducing phosphofructokinase activity; however, in the recovered state following exercise adaptation, there was an increase in myocardial phosphofructokinase activity and glycolysis. In mice, cardiac-specific expression of a kinase-deficient 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase transgene (GlycoLo mice) lowered glycolytic rate and regulated the expression of genes known to promote cardiac growth. Hearts of GlycoLo mice had larger myocytes, enhanced cardiac function, and higher capillary-to-myocyte ratios. Expression of phosphatase-deficient 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase in the heart (GlycoHi mice) increased glucose utilization and promoted a more pathological form of hypertrophy devoid of transcriptional activation of the physiological cardiac growth program. Modulation of phosphofructokinase activity was sufficient to regulate the glucose–fatty acid cycle in the heart; however, metabolic inflexibility caused by invariantly low or high phosphofructokinase activity caused modest mitochondrial damage. Transcriptomic analyses showed that glycolysis regulates the expression of key genes involved in cardiac metabolism and remodeling. Conclusions: Exercise-induced decreases in glycolytic activity stimulate physiological cardiac remodeling, and metabolic flexibility is important for maintaining mitochondrial health in the heart.
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Affiliation(s)
- Andrew A Gibb
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Department of Physiology (A.A.G., B.G.H.)
| | | | | | - Yuting Zheng
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | - Lindsey A McNally
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | - Detlef Obal
- Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Department of Anesthesiology (D.O.)
| | - Kartik Katragadda
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | - Patrick Trainor
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | - Daniel J Conklin
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | - Kenneth R Brittian
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | | | - Jianxun Wang
- University of Louisville, KY. Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA (J.W.)
| | - Steven P Jones
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | - Aruni Bhatnagar
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.)
| | - Bradford G Hill
- Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.) .,Diabetes and Obesity Center (A.A.G., Y.Z., L.A.M., D.O., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).,Department of Physiology (A.A.G., B.G.H.)
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18
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Padrão AI, Figueira ACC, Faustino-Rocha AI, Gama A, Loureiro MM, Neuparth MJ, Moreira-Gonçalves D, Vitorino R, Amado F, Santos LL, Oliveira PA, Duarte JA, Ferreira R. Long-term exercise training prevents mammary tumorigenesis-induced muscle wasting in rats through the regulation of TWEAK signalling. Acta Physiol (Oxf) 2017; 219:803-813. [PMID: 27228549 DOI: 10.1111/apha.12721] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 01/27/2016] [Accepted: 05/24/2016] [Indexed: 12/27/2022]
Abstract
AIM Exercise training has been suggested as a non-pharmacological approach to prevent skeletal muscle wasting and improve muscle function in cancer cachexia. However, little is known about the molecular mechanisms underlying such beneficial effect. In this study, we aimed to, firstly, examine the contribution of TWEAK signalling to cancer-induced skeletal muscle wasting and, secondly, evaluate whether long-term exercise alters TWEAK signalling and prevents muscle wasting. METHODS Female Sprague-Dawley rats were randomly assigned to control and exercise groups. Fifteen animals from each group were exposed to N-Methyl-N-nitrosourea carcinogen. Animals in exercise groups were submitted to moderate treadmill exercise for 35 weeks. After the experimental period, animals were killed and gastrocnemius muscles were harvested for morphological and biochemical analysis. RESULTS We verified that exercise training prevented tumour-induced TWEAK/NF-κB signalling in skeletal muscle with a beneficial impact in fibre cross-sectional area and metabolism. Indeed, 35 weeks of exercise training promoted the upregulation of PGC-1α and oxidative phosphorylation complexes. This exercise-induced muscle remodelling in tumour-bearing animals was associated with less malignant mammary lesions. CONCLUSION Data support the benefits of an active lifestyle for the prevention of muscle wasting secondary to breast cancer, highlighting TWEAK/NF- κB signalling as a potential therapeutic target for the preservation of muscle mass.
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Affiliation(s)
- A. I. Padrão
- QOPNA; Department of Chemistry; University of Aveiro; Aveiro Portugal
- CIAFEL; Faculty of Sport; University of Porto; Porto Portugal
| | | | - A. I. Faustino-Rocha
- CITAB; Department of Veterinary Sciences; University of Trás-os-Montes e Alto Douro; Vila Real Portugal
| | - A. Gama
- CITAB; Department of Veterinary Sciences; University of Trás-os-Montes e Alto Douro; Vila Real Portugal
| | - M. M. Loureiro
- QOPNA; Department of Chemistry; University of Aveiro; Aveiro Portugal
| | - M. J. Neuparth
- CIAFEL; Faculty of Sport; University of Porto; Porto Portugal
| | - D. Moreira-Gonçalves
- CIAFEL; Faculty of Sport; University of Porto; Porto Portugal
- Department of Physiology and Cardiothoracic Surgery; Faculty of Medicine; University of Porto; Porto Portugal
| | - R. Vitorino
- QOPNA; Department of Chemistry; University of Aveiro; Aveiro Portugal
- Department of Medical Sciences and Institute for Biomedicine - iBiMED; University of Aveiro; Aveiro Portugal
| | - F. Amado
- QOPNA; Department of Chemistry; University of Aveiro; Aveiro Portugal
| | - L. L. Santos
- Experimental Pathology and Therapeutics Group; Portuguese Institute of Oncology; Porto Portugal
| | - P. A. Oliveira
- CITAB; Department of Veterinary Sciences; University of Trás-os-Montes e Alto Douro; Vila Real Portugal
| | - J. A. Duarte
- CIAFEL; Faculty of Sport; University of Porto; Porto Portugal
| | - R. Ferreira
- QOPNA; Department of Chemistry; University of Aveiro; Aveiro Portugal
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19
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Abstract
Chronic heart failure (CHF) is a highly prevalent condition among the elderly and is associated with considerable morbidity, institutionalization and mortality. In its advanced stages, CHF is often accompanied by the loss of muscle mass and strength. Sarcopenia is a geriatric syndrome that has been actively studied in recent years due to its association with a wide range of adverse health outcomes. The goal of this review is to discuss the relationship between CHF and sarcopenia, with a focus on shared pathophysiological pathways and treatments. Malnutrition, systemic inflammation, endocrine imbalances, and oxidative stress appear to connect sarcopenia and CHF. At the muscular level, alterations of the ubiquitin proteasome system, myostatin signaling, and apoptosis have been described in both sarcopenia and CHF and could play a role in the loss of muscle mass and function. Possible therapeutic strategies to impede the progression of muscle wasting in CHF patients include protein and vitamin D supplementation, structured physical exercise, and the administration of angiotensin-converting enzyme inhibitors and β-blockers. Hormonal supplementation with growth hormone, testosterone, and ghrelin is also discussed as a potential treatment.
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20
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Zhou J, Liu B, Liang C, Li Y, Song YH. Cytokine Signaling in Skeletal Muscle Wasting. Trends Endocrinol Metab 2016; 27:335-347. [PMID: 27025788 DOI: 10.1016/j.tem.2016.03.002] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/04/2016] [Accepted: 03/04/2016] [Indexed: 02/07/2023]
Abstract
Skeletal muscle wasting occurs in a variety of diseases including diabetes, cancer, Crohn's disease, chronic obstructive pulmonary disease (COPD), disuse, and denervation. Tumor necrosis factor α (TNF-α) is involved in mediating the wasting effect. To date, a causal relationship between TNF-α signaling and muscle wasting has been established in animal models. However, results from clinical trials are conflicting. This is partly due to the fact that other factors such as TNF-like weak inducer of apoptosis (TWEAK) and interleukin 6 (IL-6) are also involved in skeletal muscle wasting. Because muscle wasting is often associated with physical inactivity and reduced food intake, therapeutic interventions will be most effective when multiple approaches are used in conjunction with nutritional support and exercise.
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Affiliation(s)
- Jin Zhou
- Department of General Surgery, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, 215006, P.R. China
| | - Bin Liu
- Cardiovascular Disease Center, The First Hospital of Ji Lin University, Changchun, Jilin, 130021, P.R. China
| | - Chun Liang
- Department of Cardiology, ChangZheng Hospital, Second Military Medical University, Shanghai, 200003, P.R. China
| | - Yangxin Li
- Department of Cardiovascular Surgery and Institute of Cardiovascular Science, First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215123, P.R. China.
| | - Yao-Hua Song
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, P.R. China.
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21
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Yarar-Fisher C, Bickel CS, Kelly NA, Stec MJ, Windham ST, McLain AB, Oster RA, Bamman MM. Heightened TWEAK-NF-κB signaling and inflammation-associated fibrosis in paralyzed muscles of men with chronic spinal cord injury. Am J Physiol Endocrinol Metab 2016; 310:E754-61. [PMID: 26931128 PMCID: PMC4888537 DOI: 10.1152/ajpendo.00240.2015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Accepted: 02/18/2016] [Indexed: 12/17/2022]
Abstract
Individuals with long-standing spinal cord injury (SCI) often present with extreme muscle atrophy and impaired glucose metabolism at both the skeletal muscle and whole body level. Persistent inflammation and increased levels of proinflammatory cytokines in the skeletal muscle are potential contributors to dysregulation of glucose metabolism and atrophy; however, to date no study has assessed the effects of long-standing SCI on their expression or intracellular signaling in the paralyzed muscle. In the present study, we assessed the expression of genes (TNFαR, TNFα, IL-6R, IL-6, TWEAK, TWEAK R, atrogin-1, and MuRF1) and abundance of intracellular signaling proteins (TWEAK, TWEAK R, NF-κB, and p-p65/p-50/105) that are known to mediate inflammation and atrophy in skeletal muscle. In addition, based on the effects of muscle inflammation on promotion of skeletal muscle fibrosis, we assessed the degree of fibrosis between myofibers and fascicles in both groups. For further insight into the distribution and variability of muscle fiber size, we also analyzed the frequency distribution of SCI fiber size. Resting vastus lateralis (VL) muscle biopsy samples were taken from 11 men with long-standing SCI (≈22 yr) and compared with VL samples from 11 able-bodied men of similar age. Our results demonstrated that chronic SCI muscle has heightened TNFαR and TWEAK R gene expression and NF-κB signaling (higher TWEAK R and phospho-NF-κB p65) and fibrosis, along with substantial myofiber size heterogeneity, compared with able-bodied individuals. Our data suggest that the TWEAK/TWEAK R/NF-κB signaling pathway may be an important mediator of chronic inflammation and fibrotic adaptation in SCI muscle.
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Affiliation(s)
- Ceren Yarar-Fisher
- Department of Physical Medicine and Rehabilitation, UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - C Scott Bickel
- Physical Therapy, UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Neil A Kelly
- Departments of Cell, Developmental, and Integrative Biology, UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Michael J Stec
- Departments of Cell, Developmental, and Integrative Biology, UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Samuel T Windham
- Surgery, and UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Amie B McLain
- Department of Physical Medicine and Rehabilitation, UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, Alabama; and
| | - Robert A Oster
- Medicine/Division of Preventive Medicine, University of Alabama at Birmingham (UAB), Birmingham, Alabama
| | - Marcas M Bamman
- Departments of Cell, Developmental, and Integrative Biology, Medicine/Division of Preventive Medicine, University of Alabama at Birmingham (UAB), Birmingham, Alabama; Geriatric Research, Education, and Clinical Center, Birmingham Veterans Affairs Medical Center, Birmingham, Alabama
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22
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Carson JA, Hardee JP, VanderVeen BN. The emerging role of skeletal muscle oxidative metabolism as a biological target and cellular regulator of cancer-induced muscle wasting. Semin Cell Dev Biol 2015; 54:53-67. [PMID: 26593326 DOI: 10.1016/j.semcdb.2015.11.005] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 11/12/2015] [Indexed: 12/17/2022]
Abstract
While skeletal muscle mass is an established primary outcome related to understanding cancer cachexia mechanisms, considerable gaps exist in our understanding of muscle biochemical and functional properties that have recognized roles in systemic health. Skeletal muscle quality is a classification beyond mass, and is aligned with muscle's metabolic capacity and substrate utilization flexibility. This supplies an additional role for the mitochondria in cancer-induced muscle wasting. While the historical assessment of mitochondria content and function during cancer-induced muscle loss was closely aligned with energy flux and wasting susceptibility, this understanding has expanded to link mitochondria dysfunction to cellular processes regulating myofiber wasting. The primary objective of this article is to highlight muscle mitochondria and oxidative metabolism as a biological target of cancer cachexia and also as a cellular regulator of cancer-induced muscle wasting. Initially, we examine the role of muscle metabolic phenotype and mitochondria content in cancer-induced wasting susceptibility. We then assess the evidence for cancer-induced regulation of skeletal muscle mitochondrial biogenesis, dynamics, mitophagy, and oxidative stress. In addition, we discuss environments associated with cancer cachexia that can impact the regulation of skeletal muscle oxidative metabolism. The article also examines the role of cytokine-mediated regulation of mitochondria function, followed by the potential role of cancer-induced hypogonadism. Lastly, a role for decreased muscle use in cancer-induced mitochondrial dysfunction is reviewed.
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Affiliation(s)
- James A Carson
- Integrative Muscle Biology Laboratory, Department of Exercise Science, University of South Carolina, 921 Assembly St., Columbia, SC, 29208, USA.
| | - Justin P Hardee
- Integrative Muscle Biology Laboratory, Department of Exercise Science, University of South Carolina, 921 Assembly St., Columbia, SC, 29208, USA
| | - Brandon N VanderVeen
- Integrative Muscle Biology Laboratory, Department of Exercise Science, University of South Carolina, 921 Assembly St., Columbia, SC, 29208, USA
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23
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Sato S, Ogura Y, Tajrishi MM, Kumar A. Elevated levels of TWEAK in skeletal muscle promote visceral obesity, insulin resistance, and metabolic dysfunction. FASEB J 2014; 29:988-1002. [PMID: 25466899 DOI: 10.1096/fj.14-260703] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Skeletal muscle is responsible for the majority of glucose disposal in body. Impairment in skeletal muscle glucose handling capacity leads to the state of insulin resistance. The TNF-like weak inducer of apoptosis (TWEAK) cytokine has now emerged as a major regulator of skeletal muscle mass and function. However, the role of TWEAK in skeletal muscle metabolic function remains less understood. Here, we demonstrate that with progressive age, skeletal muscle-specific TWEAK-transgenic (TWEAK-Tg) mice gain increased body weight (∼16%) and fat mass (∼64%) and show glucose intolerance and insulin insensitivity. TWEAK-Tg mice also exhibit adipocyte hypertrophy in the epididymal fat. Oxygen uptake, voluntary physical activity, and exercise capacity were significantly reduced in TWEAK-Tg mice compared with controls. Overexpression of TWEAK inhibited (∼31%) 5' AMP-activated protein kinase (AMPK) and reduced (∼31%) the levels of glucose transporter type 4 (GLUT4) without affecting the Akt pathway. TWEAK also inhibited insulin-stimulated glucose uptake (∼32%) and repressed the levels of GLUT4 (∼50%) in cultured myotubes from C57BL6 mice. TWEAK represses the levels of Krüppel-like factor 15; myocyte enhancer factor 2, and peroxisome proliferator-activated receptor-γ coactivator-1α, which are required for the activation of the GLUT4 locus. Collectively our study demonstrates that elevated levels of TWEAK in skeletal muscle cause metabolic abnormalities. Inhibition of TWEAK could be a potential approach to prevent weight gain and type 2 diabetes.
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Affiliation(s)
- Shuichi Sato
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Yuji Ogura
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Marjan M Tajrishi
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Ashok Kumar
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, USA
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24
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Molecular mechanisms and treatment targets of muscle wasting and cachexia in heart failure: an overview. Curr Opin Support Palliat Care 2014; 8:15-24. [PMID: 24452279 DOI: 10.1097/spc.0000000000000030] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
PURPOSE OF REVIEW This article aims to describe molecular pathways involved in the development of muscle wasting and cachexia, diagnostic possibilities, and potential treatments that have seen clinical testing in recent heart failure trials. An understanding of the specific changes that cause an anabolic-catabolic imbalance is an essential first step in the development of pharmaceutical intervention strategies aimed at blocking muscle wasting. RECENT FINDINGS Skeletal muscle mass and muscle strength are the most important determinants of exercise capacity in patients with heart failure. In contrast to cachexia, muscle wasting is not usually associated with weight loss, implying the need for sophisticated assessment methods to correctly diagnose muscle wasting, for example the use of computed tomography, magnetic resonance imaging, or dual energy X-ray absorptiometry. Simpler techniques such as handgrip strength, exercise testing, or even a biomarker may help in determining patients with a high pre-test probability of muscle wasting. SUMMARY Despite intensive research efforts in the field of muscle wasting during the last couple of decades, no effective treatment of muscle wasting currently exists other than exercise training. This situation remains true even though study of the molecular pathways involved in muscle wasting suggests many therapeutic targets. Easily applicable diagnostic tools may help to identify patients at risk of developing muscle wasting.
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25
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TNF-like weak inducer of apoptosis aggravates left ventricular dysfunction after myocardial infarction in mice. Mediators Inflamm 2014; 2014:131950. [PMID: 24692845 PMCID: PMC3945977 DOI: 10.1155/2014/131950] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 12/27/2013] [Accepted: 12/30/2013] [Indexed: 11/17/2022] Open
Abstract
Background. TNF-like weak inducer of apoptosis (TWEAK) has recently been shown to be potentially involved in adverse cardiac remodeling. However, neither the exact role of TWEAK itself nor of its receptor Fn14 in this setting is known. Aim of the Study. To analyze the effects of sTWEAK on myocardial function and gene expression in response to experimental myocardial infarction in mice. Results. TWEAK directly suppressed the expression of PGC-1α and genes of oxidative phosphorylation (OXPHOS) in cardiomyocytes. Systemic sTWEAK application after MI resulted in reduced left ventricular function and increased mortality without changes in interstitial fibrosis or infarct size. Molecular analysis revealed decreased phosphorylation of PI3K/Akt and ERK1/2 pathways associated with reduced expression of PGC-1α and PPARα. Likewise, expression of OXPHOS genes such as atp5O, cycs, cox5b, and ndufb5 was also reduced. Fn14 −/− mice showed significantly improved left ventricular function and PGC-1α levels after MI compared to their respective WT littermates (Fn14 +/+). Finally, inhibition of intrinsic TWEAK with anti-TWEAK antibodies resulted in improved left ventricular function and survival. Conclusions. TWEAK exerted maladaptive effects in mice after myocardial infarction most likely via direct effects on cardiomyocytes. Analysis of the potential mechanisms revealed that TWEAK reduced metabolic adaptations to increased cardiac workload by inhibition of PGC-1α.
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26
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Sato S, Ogura Y, Kumar A. TWEAK/Fn14 Signaling Axis Mediates Skeletal Muscle Atrophy and Metabolic Dysfunction. Front Immunol 2014; 5:18. [PMID: 24478779 PMCID: PMC3902304 DOI: 10.3389/fimmu.2014.00018] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Accepted: 01/14/2014] [Indexed: 01/07/2023] Open
Abstract
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) through binding to its receptor fibroblast growth factor inducible 14 (Fn14) has been shown to regulate many cellular responses including proliferation, differentiation, apoptosis, inflammation, and fibrosis, under both physiological and pathological conditions. Emerging evidence suggests that TWEAK is also a major muscle wasting cytokine. TWEAK activates nuclear factor-κB signaling and proteolytic pathways such as ubiquitin–proteasome system, autophagy, and caspases to induce muscle proteolysis in cultured myotubes. Fn14 is dormant or expressed in minimal amounts in normal healthy muscle. However, specific atrophic conditions, such as denervation, immobilization, and starvation stimulate the expression of Fn14 leading to activation of TWEAK/Fn14 signaling and eventually skeletal muscle atrophy. TWEAK also causes slow- to fast-type fiber transition in skeletal muscle. Furthermore, recent studies suggest that TWEAK diminishes mitochondrial content and represses skeletal muscle oxidative phosphorylation capacity. TWEAK mediates these effects through affecting the expression of a number of genes and microRNAs. In this review article, we have discussed the recent advancements toward understanding the role and mechanisms of action of TWEAK/Fn14 signaling in skeletal muscle with particular reference to different models of atrophy and oxidative metabolism.
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Affiliation(s)
- Shuichi Sato
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine , Louisville, KY , USA
| | - Yuji Ogura
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine , Louisville, KY , USA
| | - Ashok Kumar
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine , Louisville, KY , USA
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27
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Tajrishi MM, Zheng TS, Burkly LC, Kumar A. The TWEAK-Fn14 pathway: a potent regulator of skeletal muscle biology in health and disease. Cytokine Growth Factor Rev 2013; 25:215-25. [PMID: 24444596 DOI: 10.1016/j.cytogfr.2013.12.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 12/15/2013] [Indexed: 12/24/2022]
Abstract
TNF-like weak inducer of apoptosis (TWEAK), a TNF superfamily ligand, and its bona fide receptor, the TNF receptor superfamily member fibroblast growth factor-inducible 14 (Fn14), represent a pivotal axis for shaping both physiological and pathological tissue responses to acute or chronic injury and disease. In recent years significant advances have been made in delineating the prominent role of TWEAK-Fn14 dyad in regulating skeletal muscle mass and metabolism. Also emerging from the broad study of tissue injury in skeletal muscle and other organs is the role of the TWEAK-Fn14 pathway in promoting fibrosis. This review article highlights recent advancements toward understanding how the TWEAK-Fn14 pathway regulates the response to various skeletal muscle insults and, more broadly, engages multiple mechanisms to drive tissue fibrosis.
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Affiliation(s)
- Marjan M Tajrishi
- Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY 40202, United States
| | - Timothy S Zheng
- Department of Immunology, Biogen Idec, 12 Cambridge Center, Cambridge, MA 02142, United States
| | - Linda C Burkly
- Department of Immunology, Biogen Idec, 12 Cambridge Center, Cambridge, MA 02142, United States.
| | - Ashok Kumar
- Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY 40202, United States.
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28
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Hindi SM, Mishra V, Bhatnagar S, Tajrishi MM, Ogura Y, Yan Z, Burkly LC, Zheng TS, Kumar A. Regulatory circuitry of TWEAK-Fn14 system and PGC-1α in skeletal muscle atrophy program. FASEB J 2013; 28:1398-411. [PMID: 24327607 DOI: 10.1096/fj.13-242123] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Skeletal muscle wasting attributed to inactivity has significant adverse functional consequences. Accumulating evidence suggests that peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α) and TNF-like weak inducer of apoptosis (TWEAK)-Fn14 system are key regulators of skeletal muscle mass in various catabolic states. While the activation of TWEAK-Fn14 signaling causes muscle wasting, PGC-1α preserves muscle mass in several conditions, including functional denervation and aging. However, it remains unknown whether there is any regulatory interaction between PGC-1α and TWEAK-Fn14 system during muscle atrophy. Here we demonstrate that TWEAK significantly reduces the levels of PGC-1α and mitochondrial content (∼50%) in skeletal muscle. Levels of PGC-1α are significantly increased in skeletal muscle of TWEAK-knockout (KO) and Fn14-KO mice compared to wild-type mice on denervation. Transgenic (Tg) overexpression of PGC-1α inhibited progressive muscle wasting in TWEAK-Tg mice. PGC-1α inhibited the TWEAK-induced activation of NF-κB (∼50%) and dramatically reduced (∼90%) the expression of atrogenes such as MAFbx and MuRF1. Intriguingly, muscle-specific overexpression of PGC-1α also prevented the inducible expression of Fn14 in denervated skeletal muscle. Collectively, our study demonstrates that TWEAK induces muscle atrophy through repressing the levels of PGC-1α. Overexpression of PGC-1α not only blocks the TWEAK-induced atrophy program but also diminishes the expression of Fn14 in denervated skeletal muscle.
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Affiliation(s)
- Sajedah M Hindi
- 2Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, 500 South Preston St., Louisville, KY 40202, USA.
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