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Rontoyanni VG, Blears E, Nunez Lopez O, Ogunbileje J, Moro T, Bhattarai N, Randolph AC, Fry CS, Fankhauser GT, Cheema ZF, Murton AJ, Volpi E, Rasmussen BB, Porter C. Skeletal Muscle Bioenergetics in Critical Limb Ischemia and Diabetes. J Surg Res 2023; 288:108-117. [PMID: 36963297 PMCID: PMC10192034 DOI: 10.1016/j.jss.2023.02.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 02/06/2023] [Accepted: 02/19/2023] [Indexed: 03/26/2023]
Abstract
INTRODUCTION Mitochondrial dysfunction is implicated in the metabolic myopathy accompanying peripheral artery disease (PAD) and critical limb ischemia (CLI). Type-2 diabetes mellitus (T2DM) is a major risk factor for PAD development and progression to CLI and may also independently be related to mitochondrial dysfunction. We set out to determine the effect of T2DM in the relationship between CLI and muscle mitochondrial respiratory capacity and coupling control. METHODS We studied CLI patients undergoing revascularization procedures or amputation, and non-CLI patients with or without T2DM of similar age. Mitochondrial respiratory capacity and function were determined in lower limb permeabilized myofibers by high-resolution respirometry. RESULTS Fourteen CLI patients (65 ± 10y) were stratified into CLI patients with (n = 8) or without (n = 6) T2DM and were compared to non-CLI patients with (n = 18; 69 ± 5y) or without (n = 19; 71 ± 6y) T2DM. Presence of CLI but not T2DM had a marked impact on all mitochondrial respiratory states in skeletal muscle, adjusted for the effects of sex. Leak respiration (State 2, P < 0.025 and State 4o, P < 0.01), phosphorylating respiration (P < 0.001), and maximal respiration in the uncoupled state (P < 0.001), were all suppressed in CLI patients, independent of T2DM. T2DM had no significant effect on mitochondrial respiratory capacity and function in adults without CLI. CONCLUSIONS Skeletal muscle mitochondrial respiratory capacity was blunted by ∼35% in patients with CLI. T2DM was not associated with muscle oxidative capacity and did not moderate the relationship between muscle mitochondrial respiratory capacity and CLI.
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Affiliation(s)
| | - Elizabeth Blears
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas
| | - Omar Nunez Lopez
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas
| | - John Ogunbileje
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas
| | - Tatiana Moro
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas
| | - Nisha Bhattarai
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas; Division of Rehabilitation Sciences, University of Texas Medical Branch, Galveston, Texas
| | - Amanda C Randolph
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas
| | - Christopher S Fry
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas; Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas
| | - Grant T Fankhauser
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas
| | - Zulfiqar F Cheema
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas
| | - Andrew J Murton
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas
| | - Elena Volpi
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas; Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas
| | - Blake B Rasmussen
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas; Department of Internal Medicine, University of Texas Medical Branch, Galveston, Texas
| | - Craig Porter
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas; Department of Pediatrics, University of Arkansas for Medical Sciences & Arkansas Children's Research Institute, Little Rock, Arkansas.
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Wang G, Yu Y, Wang YZ, Yin PH, Xu K, Zhang H. The effects and mechanisms of isoliquiritigenin loaded nanoliposomes regulated AMPK/mTOR mediated glycolysis in colorectal cancer. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2021; 48:1231-1249. [PMID: 32985258 DOI: 10.1080/21691401.2020.1825092] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
In this study, isoliquiritigenin (ISL) incorporated nanoliposomes were prepared and their effects on colorectal cancer (CRC) cell lines were investigated. Herein, we sought to explore the anti-cancer mechanisms of ISL loaded nanoliposomes (ISL-NLs) on AMP-activated protein kinase/mammalian target of rapamycin (AMPK/mTOR) pathways mediated glycolysis. Also, the key targets such as caveolin 1 (CAV1), glucose transporters and Akt/mTOR that promote glycolysis, and are activated via the induction of α-enolase (ENO1), fructose bisphosphate aldolase A (ALDOA) and monocarboxylate transporter 4 (MCT4) expressions were also investigated. It was shown that ISL-NLs significantly suppressed the proliferation and glucose uptake of CRC cell by potentially regulating the glycolysis and lactate targets as well as pathways that formed the basis of the anti-CRC effects of ISL-NLs. The mechanism underlying this effect was further validated via the regulation of some key targets such as ENO1, ALDOA, lactate dehydrogenase A (LDHA) and MCT4 in glycolysis coupled with cellular myelocytomatosis oncogene (c-myc), hypoxia-inducible factor 1-alpha (HIF-1α) in protein kinase B/mTOR (Akt/mTOR) pathways. Moreover, the AMPK proteins were identified to be up-regulated while the lactic acid production was suppressed by ISL-NLs in the CRC cells, indicating that ISL-NLs had an inhibitory effect on AMPK mediated glycolysis and lactate production. Altogether, these results have provided insights into the mechanism underlying the key role that liposomal ISL played in the multiple inhibition of AMPK and Akt/mTOR mediated glycolysis and lactate generation, which may be regulated as the alternative metabolic pathways of CRC as well as serve as adjuvant therapy for the disease.
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Affiliation(s)
- Gang Wang
- Department of Pharmaceutics, Shanghai Eighth People's Hospital, Jiangsu University, Shanghai, China
| | - Yang Yu
- School of Pharmacy, Jiangsu University Zhenjiang City, China
| | - Yu-Zhu Wang
- School of Pharmacy, Jiangsu University Zhenjiang City, China
| | - Pei-Hao Yin
- Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ke Xu
- Putuo Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Heng Zhang
- Department of General Surgery, Nanjing Lishui District People's Hospital, Zhongda Hospital Lishui Branch, Southeast University, Nanjing, China
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McDermott MM, Dayanidhi S, Kosmac K, Saini S, Slysz J, Leeuwenburgh C, Hartnell L, Sufit R, Ferrucci L. Walking Exercise Therapy Effects on Lower Extremity Skeletal Muscle in Peripheral Artery Disease. Circ Res 2021; 128:1851-1867. [PMID: 34110902 DOI: 10.1161/circresaha.121.318242] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Walking exercise is the most effective noninvasive therapy that improves walking ability in peripheral artery disease (PAD). Biologic mechanisms by which exercise improves walking in PAD are unclear. This review summarizes evidence regarding effects of walking exercise on lower extremity skeletal muscle in PAD. In older people without PAD, aerobic exercise improves mitochondrial activity, muscle mass, capillary density, and insulin sensitivity in skeletal muscle. However, walking exercise increases lower extremity ischemia in people with PAD, and therefore, mechanisms by which this exercise improves walking may differ between people with and without PAD. Compared with people without PAD, gastrocnemius muscle in people with PAD has greater mitochondrial impairment, increased reactive oxygen species, and increased fibrosis. In multiple small trials, walking exercise therapy did not consistently improve mitochondrial activity in people with PAD. In one 12-week randomized trial of people with PAD randomized to supervised exercise or control, supervised treadmill exercise increased treadmill walking time from 9.3 to 15.1 minutes, but simultaneously increased the proportion of angular muscle fibers, consistent with muscle denervation (from 7.6% to 15.6%), while angular myofibers did not change in the control group (from 9.1% to 9.1%). These findings suggest an adaptive response to exercise in PAD that includes denervation and reinnervation, an adaptive process observed in skeletal muscle of people without PAD during aging. Small studies have not shown significant effects of exercise on increased capillary density in lower extremity skeletal muscle of participants with PAD, and there are no data showing that exercise improves microcirculatory delivery of oxygen and nutrients in patients with PAD. However, the effects of supervised exercise on increased plasma nitrite abundance after a treadmill walking test in people with PAD may be associated with improved lower extremity skeletal muscle perfusion and may contribute to improved walking performance in response to exercise in people with PAD. Randomized trials with serial, comprehensive measures of muscle biology, and physiology are needed to clarify mechanisms by which walking exercise interventions improve mobility in PAD.
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Affiliation(s)
- Mary M McDermott
- Department of Medicine and Preventive Medicine (M.M.M., J.S.), Northwestern University Feinberg School of Medicine
| | - Sudarshan Dayanidhi
- Shirley Ryan Ability Laboratory (S.D.), Northwestern University Feinberg School of Medicine
| | - Kate Kosmac
- Center for Muscle Biology, University of Kentucky (K.K.)
| | - Sunil Saini
- Jawaharlal Nehru University, School of Biotechnology, New Delhi, India (S.S.)
| | - Joshua Slysz
- Department of Medicine and Preventive Medicine (M.M.M., J.S.), Northwestern University Feinberg School of Medicine
| | | | - Lisa Hartnell
- Division of Intramural Research, National Institute on Aging (L.H., L.F.)
| | - Robert Sufit
- Department of Neurology (R.S.), Northwestern University Feinberg School of Medicine
| | - Luigi Ferrucci
- Division of Intramural Research, National Institute on Aging (L.H., L.F.)
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4
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The mechanism and prevention of mitochondrial injury after exercise. J Physiol Biochem 2021; 77:215-225. [PMID: 33650090 DOI: 10.1007/s13105-021-00802-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Accepted: 02/18/2021] [Indexed: 10/22/2022]
Abstract
With the development of society, physical activity has come to be an effective means by which people pursue good health to improve the quality of life. However, with the increase of intensity and the passage of time, exercise injury has become a hazard that can no longer be ignored. It is imperative to find effective ways to inhibit or reduce the negative effects of exercise. Mitochondria are important organelles involved in exercise and play an important role in exercise injury and prevention. Studies have found that exercise preconditioning and increased mitochondrial nutrition can effectively decrease mitochondrial damage after exercise. Against this background, some of the newest developments in this important field are reviewed here. The results discussed indicate that exercise preconditioning and supplement mitochondrial nutrition need to be increased to prevent exercise-related injuries.
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da Costa Daniele TM, de Bruin PFC, de Matos RS, de Bruin GS, Maia Chaves C, de Bruin VMS. Exercise effects on brain and behavior in healthy mice, Alzheimer's disease and Parkinson's disease model-A systematic review and meta-analysis. Behav Brain Res 2020; 383:112488. [PMID: 31991178 DOI: 10.1016/j.bbr.2020.112488] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 12/28/2019] [Accepted: 01/16/2020] [Indexed: 12/12/2022]
Abstract
This systematic review and meta-analysis examines how exercise modifies brain and behavior in healthy mice, dementia (D) and Parkinson disease (PD) models. A search was performed on the Medline and Scopus electronic databases (2008-2019). Search terms were "mice", "brain", "treadmill", "exercise", "physical exercise". In the total, 430 were found but only 103 were included. Animals n = 1,172; exercised 4-8 weeks (Range 24 h to 32 weeks), 60 min/day (Range 8-120 min per day), and 10/12 m/min (Range 0.2 m/min to 36 m/min). Hippocampus, cerebral cortex, striatum and whole brain were more frequently investigated. Exercise improved learning and memory. Meta-analysis showed that exercise increased: cerebral BDNF in health (n = 150; z = 5.8, CI 3.43-12.05; p < 0.001 I2 = 94.3 %), D (n = 124; z = 4.18, CI = 2.22-9.12; p < 0.001; I2 = 93.7 %) and PD (n = 16 z = 4.26, CI 5.03-48.73 p < 0.001 I2 = 94.8 %). TrkB improved in health (n = 84 z = 5.49, CI 3.8-17.73 p < 0.001, I2 = 0.000) and PD (n = 22; z = 3.1, CI = 2.58-67.3, p < 0.002 I2 = 93.8 %). Neurogenesis increased in health (n = 68; z = 7.08, CI 5.65-21.25 p < 0.001; I2 17.58) and D model (n = 116; z = 4.18, CI 2.22-9.12 p < 0.001 I2 93.7 %). Exercise augmented amyloid clearance (n = 166; z = 7.51 CI = 4.86-14.85, p < 0.001 I2 = 58.72) and reduced amyloid plaques in D models (n = 49; z = 4.65, CI = 3.94-15.3 p < 0.001 I2 = 0.000). In conclusion, exercise improved brain and behavior, neurogenesis in healthy and dementia models, reduced toxicity and cerebral amyloid. Evidence regarding inflammation, oxidative stress and energy metabolism were scarce. Studies examining acute vs chronic exercise, extreme training and the durability of exercise benefit were rare. Vascular or glucose metabolism changes were seldom reported.
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Affiliation(s)
- Thiago Medeiros da Costa Daniele
- Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Ceará, Fortaleza, Brazil; Sleep and Biological Rhythms Laboratory, UFC, Brazil; Universidade Federal do Ceará (UFC), Brazil; Universidade de Fortaleza (UNIFOR).
| | - Pedro Felipe Carvalhedo de Bruin
- Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Ceará, Fortaleza, Brazil; Sleep and Biological Rhythms Laboratory, UFC, Brazil; Universidade Federal do Ceará (UFC), Brazil.
| | - Robson Salviano de Matos
- Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Ceará, Fortaleza, Brazil; Sleep and Biological Rhythms Laboratory, UFC, Brazil; Universidade Federal do Ceará (UFC), Brazil.
| | - Gabriela Sales de Bruin
- Universidade Federal do Ceará (UFC), Brazil; Department of Neurology, Washington University in St Louis, United States.
| | - Cauby Maia Chaves
- Universidade Federal do Ceará (UFC), Brazil; Departamento de Clínica Odontológica, UFC, Brazil.
| | - Veralice Meireles Sales de Bruin
- Programa de Pós-Graduação em Ciências Médicas, Universidade Federal do Ceará, Fortaleza, Brazil; Sleep and Biological Rhythms Laboratory, UFC, Brazil; Universidade Federal do Ceará (UFC), Brazil.
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Kras KA, Hoffman N, Roust LR, Benjamin TR, DE Filippis EA, Katsanos CS. Adenosine Triphosphate Production of Muscle Mitochondria after Acute Exercise in Lean and Obese Humans. Med Sci Sports Exerc 2019; 51:445-453. [PMID: 30363008 DOI: 10.1249/mss.0000000000001812] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
INTRODUCTION Current evidence indicates mitochondrial dysfunction in humans with obesity. Acute exercise appears to enhance mitochondrial function in the muscle of nonobese humans, but its effects on mitochondrial function in muscle of humans with obesity are not known. We sought to determine whether acute aerobic exercise stimulates mitochondrial function in subsarcolemmal (SS) and intermyofibrillar (IMF) mitochondria in humans with obesity. METHODS We assessed maximal adenosine triphosphate production rate (MAPR) and citrate synthase (CS) activity in isolated SS and IMF mitochondria from subjects with body mass index < 27 kg·m (median age, 25 yr; interquartile range, 22-39 yr) and subjects with body mass index > 32 kg·m (median age, 29 yr; interquartile range, 20-39 yr) before and 3 h after a 45-min cycling exercise at an intensity corresponding to 65% HR reserve. The SS and IMF mitochondria were isolated from muscle biopsies using differential centrifugation. Maximal adenosine triphosphate production rate and CS activities were determined using luciferase-based and spectrophotometric enzyme-based assays, respectively. RESULTS Exercise increased MAPR in IMF mitochondria in both nonobese subjects and subjects with obesity (P < 0.05), but CS-specific activity did not change in either group (P > 0.05). Exercise increased MAPR supported by complex II in SS mitochondria, in both groups (P < 0.05), but MAPR supported by complex I or palmitate did not increase by exercise in the subjects with obesity (P > 0.05). Citrate synthase-specific activity increased in SS mitochondria in response to exercise only in nonobese subjects (P < 0.05). CONCLUSIONS In nonobese humans, acute aerobic exercise increases MAPR in both SS and IMF mitochondria. In humans with obesity, the exercise increases MAPR in IMF mitochondria, but this response is less evident in SS mitochondria.
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Affiliation(s)
- Katon A Kras
- Center for Metabolic and Vascular Biology, Arizona State University, Scottsdale, AZ
| | - Nyssa Hoffman
- Center for Metabolic and Vascular Biology, Arizona State University, Scottsdale, AZ
| | - Lori R Roust
- College of Medicine, Mayo Clinic in Arizona, Scottsdale, AZ
| | | | | | - Christos S Katsanos
- Center for Metabolic and Vascular Biology, Arizona State University, Scottsdale, AZ.,College of Medicine, Mayo Clinic in Arizona, Scottsdale, AZ
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Yuan Y, Xu Y, Xu J, Liang B, Cai X, Zhu C, Wang L, Wang S, Zhu X, Gao P, Wang X, Zhang Y, Jiang Q, Shu G. Succinate promotes skeletal muscle protein synthesis via Erk1/2 signaling pathway. Mol Med Rep 2017; 16:7361-7366. [PMID: 28944867 PMCID: PMC5865866 DOI: 10.3892/mmr.2017.7554] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 09/07/2017] [Indexed: 12/25/2022] Open
Abstract
It is well known that endurance training is effective to attenuate skeletal muscle atrophy. Succinate is a typical TCA metabolite, of which exercise could dramatically increase the content. The present study aimed to investigate the effect of succinate on protein synthesis in skeletal muscle, and try to delineate the underlying mechanism. The in vitro study revealed that succinate dose‑dependently increased protein synthesis in C2C12 myotube along with the enhancement of phosphorylation levels of AKT Serine/Threonine Kinase 1(Akt), mammalian target of rapamycin, S6, eukaryotic translation initiation factor 4E, 4E binding protein 1 and forkhead box O (FoxO) 3a. Furthermore, it was demonstrated that 20 mM succinate markedly increased [Ca2+]i. Then, the phospho‑extracellular regulated kinase (Erk), ‑Akt level and the crosstalk between Erk and Akt were elevated in response to succinate. Notably, the Erk antagonist (U0126) or mTOR inhibitor (rapamycin) abolished the effect of succinate on protein synthesis. The in vivo study verified that succinate dose‑dependently increased the protein synthesis, in addition to phosphorylation levels of Erk, Akt and FoxO3a in gastrocnemius muscle. In summary, these findings demonstrated that succinate promoted skeletal muscle protein deposition via Erk/Akt signaling pathway.
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Affiliation(s)
- Yexian Yuan
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Yaqiong Xu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Jingren Xu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Bingqing Liang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Xingcai Cai
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Canjun Zhu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Lina Wang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Songbo Wang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Xiaotong Zhu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Ping Gao
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Xiuqi Wang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Yongliang Zhang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Qingyan Jiang
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
| | - Gang Shu
- Guangdong Province Key Laboratory of Animal Nutritional Regulation, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
- Animal Nutrition Control Research Alliance, South China Agricultural University, Guangzhou, Guangdong 510642, P.R. China
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Watanabe A, Poole DC, Kano Y. The effects of RSR13 on microvascular Po2 kinetics and muscle contractile performance in the rat arterial ligation model of peripheral arterial disease. J Appl Physiol (1985) 2017; 123:764-772. [DOI: 10.1152/japplphysiol.00257.2017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 05/17/2017] [Accepted: 06/08/2017] [Indexed: 01/12/2023] Open
Abstract
Exercise intolerance and claudication are symptomatic of peripheral arterial disease. There is a close relationship between muscle O2 delivery, microvascular oxygen partial pressure (P mvO2), and contractile performance. We therefore hypothesized that a reduction of hemoglobin-oxygen affinity via RSR13 would maintain a higher P mvO2 and enhance blood-muscle O2 transport and contractile function. In male Wistar rats (12 wk of age), we created hindlimb ischemia via right-side iliac artery ligation (AL). The contralateral (left) muscle served as control (CONT). Seven days after AL, phosphorescence-quenching techniques were used to measure P mvO2 at rest and during contractions (electrical stimulation; 1 Hz, 300 s) in tibialis anterior muscle (TA) under saline ( n = 10) or RSR13 ( n = 10) conditions. RSR13 at rest increased TA P mvO2 in CONT (13.9 ± 1.6 to 19.3 ± 1.9 Torr, P < 0.05) and AL (9.0 ± 0.5 to 9.9 ± 0.7 Torr, P < 0.05). Furthermore, RSR13 extended maintenance of the initial TA force (i.e., improved contractile performance) such that force was not decreased significantly until contraction 240 vs. 150 in CONT and 80 vs. 20 in AL. This improved muscle endurance with RSR13 was accompanied by a greater ΔP mvO2 (P mvO2 decrease from baseline) (CONT, 7.4 ± 1.0 to 11.2 ± 1.3; AL, 6.9 ± 0.5 to 8.6 ± 0.6 Torr, both P < 0.05). Whereas RSR13 did not alter the kinetics profile of P mvO2 (i.e., mean response time) substantially during contractions, muscle force was elevated, and the ratio of muscle force to P mvO2 increased. In conclusion, reduction of hemoglobin-oxygen affinity via RSR13 in AL increased P mvO2 and improved muscle contractile performance most likely via enhanced blood-muscle O2 diffusion. NEW & NOTEWORTHY This is the first investigation to examine the effect of RSR13 (erythrocyte allosteric effector) on skeletal muscle microvascular oxygen partial pressure kinetics and contractile function using an arterial ligation model of peripheral arterial disease in experimental animals. The present results provide strong support for the concept that reducing hemoglobin-O2 affinity via RSR13 improved tibialis anterior muscle contractile performance most likely via enhanced blood-muscle O2 diffusion.
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Affiliation(s)
- Aiko Watanabe
- Department of Engineering Science, University of Electro-Communications, Chofu, Tokyo, Japan; and
| | - David C. Poole
- Departments of Anatomy, Physiology and Kinesiology, Kansas State University, Manhattan, KS
| | - Yutaka Kano
- Department of Engineering Science, University of Electro-Communications, Chofu, Tokyo, Japan; and
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van Schaardenburgh M, Wohlwend M, Rognmo Ø, Mattsson EJR. Exercise in claudicants increase or decrease walking ability and the response relates to mitochondrial function. J Transl Med 2017; 15:130. [PMID: 28592294 PMCID: PMC5463401 DOI: 10.1186/s12967-017-1232-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 05/31/2017] [Indexed: 12/02/2022] Open
Abstract
Background Exercise of patients with intermittent claudication improves walking performance. Exercise does not usually increase blood flow, but seems to increase muscle mitochondrial enzyme activities. Although exercise is beneficial in most patients, it might be harmful in some. The mitochondrial response to exercise might therefore differ between patients. Our hypothesis was that changes in walking performance relate to changes in mitochondrial function after 8 weeks of exercise. At a subgroup level, negative responders decrease and positive responders increase mitochondrial capacity. Methods Two types of exercise were studied, calf raising and walking (n = 28). We wanted to see whether there were negative and positive responders, independent of type of exercise. Measurements of walking performance, peripheral hemodynamics, mitochondrial respiration and content (citrate synthase activity) were obtained on each patient before and after the intervention period. Multiple linear regression was used to test whether changes in peak walking time relate to mitochondrial function. Subgroups of negative (n = 8) and positive responders (n = 8) were defined as those that either decreased or increased peak walking time following exercise. Paired t test and analysis of covariance was used to test changes within and between subgroups. Results Changes in peak walking time were related to changes in mitochondrial respiration supported by electron transferring flavoprotein (ETF + CI)P (p = 0.004), complex I (CI + ETF)P (p = 0.003), complex I + complex II (CI + CII + ETF)P (p = 0.037) and OXPHOS coupling efficiency (p = 0.046) in the whole group. Negative responders had more advanced peripheral arterial disease. Mitochondrial respiration supported by electron transferring flavoprotein (ETF + CI)P (p = 0.0013), complex I (CI + ETF)P (p = 0.0005), complex I + complex II (CI + CII + ETF)P (p = 0.011) and electron transfer system capacity (CI + CII + ETF)E (p = 0.021) and OXPHOS coupling efficiency decreased in negative responders (p = 0.0007) after exercise. Positive responders increased citrate synthase activity (p = 0.010). Conclusions Changes in walking performance seem to relate to changes in mitochondrial function after exercise. Negative responders have more advanced peripheral arterial disease and decrease, while positive responders increase mitochondrial capacity. Trial registration ClinicalTrials.gov ID: NCT023110256
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Affiliation(s)
- Michel van Schaardenburgh
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, PO box 8905, 7491, Trondheim, Norway.
| | - Martin Wohlwend
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, PO box 8905, 7491, Trondheim, Norway
| | - Øivind Rognmo
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, PO box 8905, 7491, Trondheim, Norway
| | - Erney J R Mattsson
- Department of Circulation and Medical Imaging, Norwegian University of Science and Technology, PO box 8905, 7491, Trondheim, Norway.,Department of Vascular Surgery, St. Olavs Hospital, Trondheim, Norway
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Van Schaardenburgh M, Wohlwend M, Rognmo Ø, Mattsson E. Calf raise exercise increases walking performance in patients with intermittent claudication. J Vasc Surg 2017; 65:1473-1482. [DOI: 10.1016/j.jvs.2016.12.106] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 12/06/2016] [Indexed: 01/12/2023]
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11
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Rontoyanni VG, Nunez Lopez O, Fankhauser GT, Cheema ZF, Rasmussen BB, Porter C. Mitochondrial Bioenergetics in the Metabolic Myopathy Accompanying Peripheral Artery Disease. Front Physiol 2017; 8:141. [PMID: 28348531 PMCID: PMC5346567 DOI: 10.3389/fphys.2017.00141] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 02/23/2017] [Indexed: 11/14/2022] Open
Abstract
Peripheral artery disease (PAD) is a serious but relatively underdiagnosed and undertreated clinical condition associated with a marked reduction in functional capacity and a heightened risk of morbidity and mortality. The pathophysiology of lower extremity PAD is complex, and extends beyond the atherosclerotic arterial occlusion and subsequent mismatch between oxygen demand and delivery to skeletal muscle mitochondria. In this review, we evaluate and summarize the available evidence implicating mitochondria in the metabolic myopathy that accompanies PAD. Following a short discussion of the available in vivo and in vitro methodologies to quantitate indices of muscle mitochondrial function, we review the current evidence implicating skeletal muscle mitochondrial dysfunction in the pathophysiology of PAD myopathy, while attempting to highlight questions that remain unanswered. Given the rising prevalence of PAD, the detriment in quality of life for patients, and the associated significant healthcare resource utilization, new alternate therapies that ameliorate lower limb symptoms and the functional impairment associated with PAD are needed. A clear understanding of the role of mitochondria in the pathophysiology of PAD may contribute to the development of novel therapeutic interventions.
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Affiliation(s)
- Victoria G. Rontoyanni
- Metabolism Unit, Shriners Hospitals for ChildrenGalveston, TX, USA
- Department of Surgery, University of Texas Medical BranchGalveston, TX, USA
| | - Omar Nunez Lopez
- Metabolism Unit, Shriners Hospitals for ChildrenGalveston, TX, USA
- Department of Surgery, University of Texas Medical BranchGalveston, TX, USA
| | | | - Zulfiqar F. Cheema
- Department of Surgery, University of Texas Medical BranchGalveston, TX, USA
| | - Blake B. Rasmussen
- Department of Nutrition and Metabolism, University of Texas Medical BranchGalveston, TX, USA
| | - Craig Porter
- Metabolism Unit, Shriners Hospitals for ChildrenGalveston, TX, USA
- Department of Surgery, University of Texas Medical BranchGalveston, TX, USA
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