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Zhuang H, Karvinen S, Törmäkangas T, Zhang X, Ojanen X, Velagapudi V, Alen M, Britton SL, Koch LG, Kainulainen H, Cheng S, Wiklund P. Interactive effects of aging and aerobic capacity on energy metabolism-related metabolites of serum, skeletal muscle, and white adipose tissue. GeroScience 2021; 43:2679-2691. [PMID: 34089174 PMCID: PMC8602622 DOI: 10.1007/s11357-021-00387-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Accepted: 05/17/2021] [Indexed: 12/25/2022] Open
Abstract
Aerobic capacity is a strong predictor of longevity. With aging, aerobic capacity decreases concomitantly with changes in whole body metabolism leading to increased disease risk. To address the role of aerobic capacity, aging, and their interaction on metabolism, we utilized rat models selectively bred for low and high intrinsic aerobic capacity (LCRs/HCRs) and compared the metabolomics of serum, muscle, and white adipose tissue (WAT) at two time points: Young rats were sacrificed at 9 months of age, and old rats were sacrificed at 21 months of age. Targeted and semi-quantitative metabolomics analysis was performed on the ultra-pressure liquid chromatography tandem mass spectrometry (UPLC-MS) platform. The effects of aerobic capacity, aging, and their interaction were studied via regression analysis. Our results showed that high aerobic capacity is associated with an accumulation of isovalerylcarnitine in muscle and serum at rest, which is likely due to more efficient leucine catabolism in muscle. With aging, several amino acids were downregulated in muscle, indicating more efficient amino acid metabolism, whereas in WAT less efficient amino acid metabolism and decreased mitochondrial β-oxidation were observed. Our results further revealed that high aerobic capacity and aging interactively affect lipid metabolism in muscle and WAT, possibly combating unfavorable aging-related changes in whole body metabolism. Our results highlight the significant role of WAT metabolism for healthy aging.
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Affiliation(s)
- Haihui Zhuang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Systems Biomedicine (Ministry of Education), and Exercise Translational Medicine Center, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Sira Karvinen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland.
| | - Timo Törmäkangas
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Xiaobo Zhang
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Systems Biomedicine (Ministry of Education), and Exercise Translational Medicine Center, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
| | - Xiaowei Ojanen
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
| | - Vidya Velagapudi
- Metabolomics Unit, Institute for Molecular Medicine Finland (FIMM), HiLIFE, University of Helsinki, Helsinki, Finland
| | - Markku Alen
- Department of Medical Rehabilitation, Oulu University Hospital, Oulu, Finland
| | - Steven L Britton
- Department of Anesthesiology, University of Michigan, Ann Arbor, MI, USA
- Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI, USA
| | - Lauren G Koch
- Department of Physiology and Pharmacology, The University of Toledo College of Medicine and Life Sciences, Toledo, OH, USA
| | - Heikki Kainulainen
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Sulin Cheng
- School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
- Key Laboratory of Systems Biomedicine (Ministry of Education), and Exercise Translational Medicine Center, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
- Faculty of Sport and Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Petri Wiklund
- Key Laboratory of Systems Biomedicine (Ministry of Education), and Exercise Translational Medicine Center, Shanghai Center for Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
- Huawei Helsinki Research Center, Huawei Technologies Oy (Finland) Co. Ltd, Helsinki, Finland
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Yap KN, Yamada K, Zikeli S, Kiaris H, Hood WR. Evaluating endoplasmic reticulum stress and unfolded protein response through the lens of ecology and evolution. Biol Rev Camb Philos Soc 2020; 96:541-556. [PMID: 33164297 DOI: 10.1111/brv.12667] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 10/13/2020] [Accepted: 10/28/2020] [Indexed: 12/11/2022]
Abstract
Considerable progress has been made in understanding the physiological basis for variation in the life-history patterns of animals, particularly with regard to the roles of oxidative stress and hormonal regulation. However, an underappreciated and understudied area that could play a role in mediating inter- and intraspecific variation of life history is endoplasmic reticulum (ER) stress, and the resulting unfolded protein response (UPRER ). ER stress response and the UPRER maintain proteostasis in cells by reducing the intracellular load of secretory proteins and enhancing protein folding capacity or initiating apoptosis in cells that cannot recover. Proper modulation of the ER stress response and execution of the UPRER allow animals to respond to intracellular and extracellular stressors and adapt to constantly changing environments. ER stress responses are heritable and there is considerable individual variation in UPRER phenotype in animals, suggesting that ER stress and UPRER phenotype can be subjected to natural selection. The variation in UPRER phenotype presumably reflects the way animals respond to ER stress and environmental challenges. Most of what we know about ER stress and the UPRER in animals has either come from biomedical studies using cell culture or from experiments involving conventional laboratory or agriculturally important models that exhibit limited genetic diversity. Furthermore, these studies involve the assessment of experimentally induced qualitative changes in gene expression as opposed to the quantitative variations that occur in naturally existing populations. Almost all of these studies were conducted in controlled settings that are often quite different from the conditions animals experience in nature. Herein, we review studies that investigated ER stress and the UPRER in relation to key life-history traits including growth and development, reproduction, bioenergetics and physical performance, and ageing and senescence. We then ask if these studies can inform us about the role of ER stress and the UPRER in mediating the aforementioned life-history traits in free-living animals. We propose that there is a need to conduct experiments pertaining to ER stress and the UPRER in ecologically relevant settings, to characterize variation in ER stress and the UPRER in free-living animals, and to relate the observed variation to key life-history traits. We urge others to integrate multiple physiological systems and investigate how interactions between ER stress and oxidative stress shape life-history trade-offs in free-living animals.
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Affiliation(s)
- Kang Nian Yap
- Department of Biological Sciences, Auburn University, 101 Rouse Life Science Building, Auburn, AL, 36849, U.S.A
| | - KayLene Yamada
- Department of Biological Sciences, Auburn University, 101 Rouse Life Science Building, Auburn, AL, 36849, U.S.A
| | - Shelby Zikeli
- Department of Biological Sciences, Auburn University, 101 Rouse Life Science Building, Auburn, AL, 36849, U.S.A
| | - Hippokratis Kiaris
- Department of Drug Discovery and Biomedical Sciences, College of Pharmacy, and Peromyscus Genetic Stock Center, University of South Carolina, Columbia, SC, 29208, U.S.A
| | - Wendy R Hood
- Department of Biological Sciences, Auburn University, 101 Rouse Life Science Building, Auburn, AL, 36849, U.S.A
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Hesketh SJ, Sutherland H, Lisboa PJ, Jarvis JC, Burniston JG. Adaptation of rat fast‐twitch muscle to endurance activity is underpinned by changes to protein degradation as well as protein synthesis. FASEB J 2020; 34:10398-10417. [DOI: 10.1096/fj.202000668rr] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/14/2020] [Accepted: 05/21/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Stuart J. Hesketh
- Research Institute for Sport & Exercise Sciences Liverpool John Moores University Liverpool UK
| | - Hazel Sutherland
- Research Institute for Sport & Exercise Sciences Liverpool John Moores University Liverpool UK
| | - Paulo J. Lisboa
- Department of Applied Mathematics Liverpool John Moores University Liverpool UK
| | - Jonathan C. Jarvis
- Research Institute for Sport & Exercise Sciences Liverpool John Moores University Liverpool UK
| | - Jatin G. Burniston
- Research Institute for Sport & Exercise Sciences Liverpool John Moores University Liverpool UK
- Liverpool Centre for Cardiovascular Science Liverpool John Moores University Liverpool UK
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Srisawat K, Hesketh K, Cocks M, Strauss J, Edwards BJ, Lisboa PJ, Shepherd S, Burniston JG. Reliability of Protein Abundance and Synthesis Measurements in Human Skeletal Muscle. Proteomics 2020; 20:e1900194. [DOI: 10.1002/pmic.201900194] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/05/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Kanchana Srisawat
- Research Institute for Sport & Exercise SciencesLiverpool John Moores University Liverpool L3 3AF UK
| | - Katie Hesketh
- Research Institute for Sport & Exercise SciencesLiverpool John Moores University Liverpool L3 3AF UK
| | - Matt Cocks
- Research Institute for Sport & Exercise SciencesLiverpool John Moores University Liverpool L3 3AF UK
| | - Juliette Strauss
- Research Institute for Sport & Exercise SciencesLiverpool John Moores University Liverpool L3 3AF UK
| | - Ben J. Edwards
- Research Institute for Sport & Exercise SciencesLiverpool John Moores University Liverpool L3 3AF UK
| | - Paulo J. Lisboa
- Department of Applied MathematicsLiverpool John Moores University Liverpool L3 3AF UK
| | - Sam Shepherd
- Research Institute for Sport & Exercise SciencesLiverpool John Moores University Liverpool L3 3AF UK
| | - Jatin G. Burniston
- Research Institute for Sport & Exercise SciencesLiverpool John Moores University Liverpool L3 3AF UK
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Endurance-Type Exercise Increases Bulk and Individual Mitochondrial Protein Synthesis Rates in Rats. Int J Sport Nutr Exerc Metab 2020; 30:153–164. [DOI: 10.1123/ijsnem.2019-0281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 11/22/2019] [Accepted: 11/27/2019] [Indexed: 11/18/2022]
Abstract
Physical activity increases muscle protein synthesis rates. However, the impact of exercise on the coordinated up- and/or downregulation of individual protein synthesis rates in skeletal muscle tissue remains unclear. The authors assessed the impact of exercise on mixed muscle, myofibrillar, and mitochondrial protein synthesis rates as well as individual protein synthesis rates in vivo in rats. Adult Lewis rats either remained sedentary (n = 3) or had access to a running wheel (n = 3) for the last 2 weeks of a 3-week experimental period. Deuterated water was injected and subsequently administered in drinking water over the experimental period. Blood and soleus muscle were collected and used to assess bulk mixed muscle, myofibrillar, and mitochondrial protein synthesis rates using gas chromatography–mass spectrometry and individual muscle protein synthesis rates using liquid chromatography–mass spectrometry (i.e., dynamic proteomic profiling). Wheel running resulted in greater myofibrillar (3.94 ± 0.26 vs. 3.03 ± 0.15%/day; p < .01) and mitochondrial (4.64 ± 0.24 vs. 3.97 ± 0.26%/day; p < .05), but not mixed muscle (2.64 ± 0.96 vs. 2.38 ± 0.62%/day; p = .71) protein synthesis rates, when compared with the sedentary condition. Exercise impacted the synthesis rates of 80 proteins, with the difference from the sedentary condition ranging between −64% and +420%. Significantly greater synthesis rates were detected for F1-ATP synthase, ATP synthase subunit alpha, hemoglobin, myosin light chain-6, and synaptopodin-2 (p < .05). The skeletal muscle protein adaptive response to endurance-type exercise involves upregulation of mitochondrial protein synthesis rates, but it is highly coordinated as reflected by the up- and downregulation of various individual proteins across different bulk subcellular protein fractions.
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Riuzzi F, Chiappalupi S, Arcuri C, Giambanco I, Sorci G, Donato R. S100 proteins in obesity: liaisons dangereuses. Cell Mol Life Sci 2020; 77:129-147. [PMID: 31363816 PMCID: PMC11104817 DOI: 10.1007/s00018-019-03257-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 07/19/2019] [Accepted: 07/24/2019] [Indexed: 02/07/2023]
Abstract
Obesity is an endemic pathophysiological condition and a comorbidity associated with hypercholesterolemia, hypertension, cardiovascular disease, type 2 diabetes mellitus, and cancer. The adipose tissue of obese subjects shows hypertrophic adipocytes, adipocyte hyperplasia, and chronic low-grade inflammation. S100 proteins are Ca2+-binding proteins exclusively expressed in vertebrates in a cell-specific manner. They have been implicated in the regulation of a variety of functions acting as intracellular Ca2+ sensors transducing the Ca2+ signal and extracellular factors affecting cellular activity via ligation of a battery of membrane receptors. Certain S100 proteins, namely S100A4, the S100A8/S100A9 heterodimer and S100B, have been implicated in the pathophysiology of obesity-promoting macrophage-based inflammation via toll-like receptor 4 and/or receptor for advanced glycation end-products ligation. Also, serum levels of S100A4, S100A8/S100A9, S100A12, and S100B correlate with insulin resistance/type 2 diabetes, metabolic risk score, and fat cell size. Yet, secreted S100B appears to exert neurotrophic effects on sympathetic fibers in brown adipose tissue contributing to the larger sympathetic innervation of this latter relative to white adipose tissue. In the present review we first briefly introduce S100 proteins and then critically examine their role(s) in adipose tissue and obesity.
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Affiliation(s)
- Francesca Riuzzi
- Department of Experimental Medicine, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132, Perugia, Italy
- Interuniversity Institute of Myology (IIM), University of Perugia, 06132, Perugia, Italy
| | - Sara Chiappalupi
- Department of Experimental Medicine, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132, Perugia, Italy
- Interuniversity Institute of Myology (IIM), University of Perugia, 06132, Perugia, Italy
| | - Cataldo Arcuri
- Department of Experimental Medicine, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132, Perugia, Italy
| | - Ileana Giambanco
- Department of Experimental Medicine, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132, Perugia, Italy
| | - Guglielmo Sorci
- Department of Experimental Medicine, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132, Perugia, Italy
- Interuniversity Institute of Myology (IIM), University of Perugia, 06132, Perugia, Italy
- Centro Universitario di Ricerca sulla Genomica Funzionale, University of Perugia, 06132, Perugia, Italy
| | - Rosario Donato
- Department of Experimental Medicine, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132, Perugia, Italy.
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Hirata BKS, Pedroso AP, Machado MMF, Neto NIP, Perestrelo BO, de Sá RDCC, Alonso-Vale MIC, Nogueira FN, Oyama LM, Ribeiro EB, Tashima AK, Telles MM. Ginkgo biloba Extract Modulates the Retroperitoneal Fat Depot Proteome and Reduces Oxidative Stress in Diet-Induced Obese Rats. Front Pharmacol 2019; 10:686. [PMID: 31258482 PMCID: PMC6587378 DOI: 10.3389/fphar.2019.00686] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 05/27/2019] [Indexed: 12/18/2022] Open
Abstract
The rapid increase in the number of individuals with obesity, over the past four decades, is triggered by a number of complex interactions among factors. Despite the plethora of treatments available, side effects are commonly observed and, in this context, herbal medicines have been employed as an alternative form of therapy. Ginkgo biloba extract (GbE) has been described as a promising new pharmacological approach to treat obesity. In order to better comprehend the mechanisms involved with this potential effect, the present study evaluated the effects of GbE treatment on diet-induced obese rats, focusing on the proteome and the oxidative stress defense system of visceral adipose tissue. After 14 days treatment, GbE significantly modulated 25 proteins. Retroperitoneal adipose tissue of treated animals exhibited higher amounts of proteins associated with adipogenesis (decorin), carbon metabolism and mitochondrial function (citrate synthase), and a concomitant reduction in adipocyte hypertrophy. In parallel, GbE down-regulated proteins involved in oxidative stress (peroxiredoxin) and the inflammatory response (complement C3, mast cell protease 1, and Ig gamma-2B chain C region). Moreover, also related to oxidative stress defense, GbE stimulated catalase activity, reduced malondialdehyde levels (lipid peroxidation indicator), and increased lactoylglutathione lyase levels. It was concluded that GbE acts as an antioxidant agent, and improved the proteome profile and oxidative stress response in the adipose tissue of diet-induced obese rats.
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Affiliation(s)
- Bruna K S Hirata
- Department of Biological Sciences, Universidade Federal de São Paulo-UNIFESP, Diadema, Brazil
| | - Amanda P Pedroso
- Department of Physiology, Universidade Federal de São Paulo-UNIFESP, São Paulo, Brazil
| | - Meira M F Machado
- Department of Biological Sciences, Universidade Federal de São Paulo-UNIFESP, Diadema, Brazil
| | - Nelson I P Neto
- Department of Physiology, Universidade Federal de São Paulo-UNIFESP, São Paulo, Brazil
| | - Bruna O Perestrelo
- Department of Biomaterials and Oral Biology, School of Dentistry, Universidade de São Paulo-USP, São Paulo, Brazil
| | - Roberta D C C de Sá
- Department of Biological Sciences, Universidade Federal de São Paulo-UNIFESP, Diadema, Brazil
| | | | - Fernando N Nogueira
- Department of Biomaterials and Oral Biology, School of Dentistry, Universidade de São Paulo-USP, São Paulo, Brazil
| | - Lila M Oyama
- Department of Physiology, Universidade Federal de São Paulo-UNIFESP, São Paulo, Brazil
| | - Eliane B Ribeiro
- Department of Physiology, Universidade Federal de São Paulo-UNIFESP, São Paulo, Brazil
| | - Alexandre K Tashima
- Department of Biochemistry, Universidade Federal de São Paulo-UNIFESP, São Paulo, Brazil
| | - Monica M Telles
- Department of Biological Sciences, Universidade Federal de São Paulo-UNIFESP, Diadema, Brazil
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Zidon TM, Park YM, Welly RJ, Woodford ML, Scroggins RJ, Britton SL, Koch LG, Booth FW, Padilla J, Kanaley JA, Vieira-Potter VJ. Voluntary wheel running improves adipose tissue immunometabolism in ovariectomized low-fit rats. Adipocyte 2018; 7:20-34. [PMID: 29226756 DOI: 10.1080/21623945.2017.1402991] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Loss of ovarian hormones is associated with increased adiposity, white adipose tissue (WAT) inflammation, and insulin resistance (IR). Previous work demonstrated ovariectomized (OVX) rats bred for high aerobic fitness (HCR) are protected against weight gain and IR compared to rats bred for low aerobic fitness (LCR) yet wheel running prevents OVX-induced IR in LCR rats. The purpose of this study was to determine whether adipose tissue immunometabolic characteristics from female HCR and LCR rats differs before or after OVX, and whether wheel running mitigates OVX-induced adipose tissue immunometabolic changes in LCR rats. Female OVX HCR and LCR rats were all fed a high fat diet (HFD) (n = 7-8/group) and randomized to either a running wheel or remain sedentary for 11 weeks. Ovary-intact rats (n = 7-12/group) were fed a standard chow diet with no wheel. Ovary-intact LCR rats had a greater visceral WAT inflammatory profile compared to HCR. Following OVX, sedentary LCR rats had greater serum leptin (p<0.001) and WAT inflammation (p<0.05) than sedentary HCR. Wheel running normalized the elevated serum leptin and reduced both visceral (p<0.05) and subcutaneous (p<0.03) WAT inflammatory markers in the LCR rats. Paradoxically, wheel running increased some markers of WAT inflammation in OVX HCR rats (p<0.05), which correlated with observed weight gain. Taken together, HCR rats appear to have a healthier WAT immune and metabolic profile compared to LCR, even following OVX. Wheel running improves WAT health in previously sedentary LCR rats. On the other hand, increased WAT inflammation is associated with adiposity gain despite a high volume of wheel running in HCR rats.
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Affiliation(s)
- Terese M. Zidon
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, US
| | - Young-Min Park
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, US
| | - Rebecca J. Welly
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, US
| | - Makenzie L. Woodford
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, US
| | - Rebecca J. Scroggins
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, US
| | - Steven L. Britton
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI, US
- Department of Molecular and Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI, US
| | - Lauren G. Koch
- Department of Anesthesiology, University of Michigan Medical School, Ann Arbor, MI, US
| | - Frank W. Booth
- Department of Biomedical Sciences, University of Missouri, Columbia, MO, US
| | - Jaume Padilla
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, US
- Department of Child Health, University of Missouri, Columbia, MO, US
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, US
| | - Jill A. Kanaley
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, US
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Cooper MA, Jack MM, Ryals JM, Hayley P, Escher T, Koch LG, Britton SL, Raupp SM, Winter MK, McCarson KE, Geiger PC, Thyfault JP, Wright DE. Rats bred for low and high running capacity display alterations in peripheral tissues and nerves relevant to neuropathy and pain. Brain Behav 2017; 7:e00780. [PMID: 29075557 PMCID: PMC5651381 DOI: 10.1002/brb3.780] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 06/04/2017] [Indexed: 12/12/2022] Open
Abstract
INTRODUCTION Diet and activity are recognized as modulators of nervous system disease, including pain. Studies of exercise consistently reveal a benefit on pain. This study focused on female rats to understand differences related to metabolic status and peripheral nerve function in females. METHODS Here, we investigated parameters of peripheral nerve function relevant to pain in rats selectively bred for high (high-capacity runners; HCR) or low endurance exercise capacity (low-capacity runners; LCR) resulting in divergent intrinsic aerobic capacities and susceptibility for metabolic conditions. RESULTS LCR female rats have reduced mechanical sensitivity, higher intraepidermal nerve fiber density and TrkA-positive epidermal axons, increased numbers of Langerhans and mast cells in cutaneous tissues, and a higher fat content despite similar overall body weights compared to female HCR rats. Sensory and motor nerve conduction velocities, thermal sensitivity, and mRNA expression of selected genes relevant to peripheral sensation were not different. CONCLUSIONS These results suggest that aerobic capacity and metabolic status influence sensory sensitivity and aspects of inflammation in peripheral tissues that could lead to poor responses to tissue damage and painful stimuli. The LCR and HCR rats should prove useful as models to assess how the metabolic status impacts pain.
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Affiliation(s)
- Michael A Cooper
- Department of Anatomy and Cell Biology University of Kansas Medical Center Kansas City KS
| | - Megan M Jack
- Department of Neurosurgery University of Kansas Medical Center Kansas City KS
| | - Janelle M Ryals
- Department of Anatomy and Cell Biology University of Kansas Medical Center Kansas City KS
| | - Page Hayley
- Department of Anatomy and Cell Biology University of Kansas Medical Center Kansas City KS
| | - Taylor Escher
- Department of Anatomy and Cell Biology University of Kansas Medical Center Kansas City KS
| | - Lauren G Koch
- Department of Anesthesiology University of Michigan Ann Arbor MI
| | - Steven L Britton
- Department of Anesthesiology University of Michigan Ann Arbor MI.,Department of Molecular and Integrative Physiology University of Michigan Ann Arbor MI
| | - Shelby M Raupp
- Department of Anesthesiology University of Michigan Ann Arbor MI
| | - Michelle K Winter
- Kansas Intellectual and Developmental Disabilities Research University of Kansas Medical Center Kansas City KS
| | - Kenneth E McCarson
- Department of Pharmacology Toxicology and Therapeutics University of Kansas Medical Center Kansas City KS
| | - Paige C Geiger
- Department of Molecular and Integrative Physiology University of Kansas Medical Center Kansas City KS
| | - John P Thyfault
- Department of Molecular and Integrative Physiology University of Kansas Medical Center Kansas City KS.,Research Service Kansas City Medical Center Kansas City MO
| | - Douglas E Wright
- Department of Anatomy and Cell Biology University of Kansas Medical Center Kansas City KS
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Abstract
The health-promoting benefits of exercise have been recognized for centuries, yet the molecular and cellular mechanisms for the acute and chronic adaptive response to a variety of physical activities remain incompletely described. This Perspective will take a forward view to highlight emerging questions and frontiers in the ever-changing landscape of exercise biology. The biology of exercise is complex, highly variable, and involves a myriad of adaptive responses in multiple organ systems. Given the multitude of changes that occur in each organ during exercise, future researchers will need to integrate tissue-specific responses with large-scale omics to resolve the integrated biology of exercise. The ultimate goal will be to understand how these system-wide, tissue-specific exercise-induced changes lead to measurable physiological outcomes at the whole-body level to improve health and well-being.
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