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Emery A, Moore S, Turner JE, Campbell JP. Reframing How Physical Activity Reduces The Incidence of Clinically-Diagnosed Cancers: Appraising Exercise-Induced Immuno-Modulation As An Integral Mechanism. Front Oncol 2022; 12:788113. [PMID: 35359426 PMCID: PMC8964011 DOI: 10.3389/fonc.2022.788113] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 01/14/2022] [Indexed: 12/13/2022] Open
Abstract
Undertaking a high volume of physical activity is associated with reduced risk of a broad range of clinically diagnosed cancers. These findings, which imply that physical activity induces physiological changes that avert or suppress neoplastic activity, are supported by preclinical intervention studies in rodents demonstrating that structured regular exercise commonly represses tumour growth. In Part 1 of this review, we summarise epidemiology and preclinical evidence linking physical activity or regular structured exercise with reduced cancer risk or tumour growth. Despite abundant evidence that physical activity commonly exerts anti-cancer effects, the mechanism(s)-of-action responsible for these beneficial outcomes is undefined and remains subject to ongoing speculation. In Part 2, we outline why altered immune regulation from physical activity - specifically to T cells - is likely an integral mechanism. We do this by first explaining how physical activity appears to modulate the cancer immunoediting process. In doing so, we highlight that augmented elimination of immunogenic cancer cells predominantly leads to the containment of cancers in a 'precancerous' or 'covert' equilibrium state, thus reducing the incidence of clinically diagnosed cancers among physically active individuals. In seeking to understand how physical activity might augment T cell function to avert cancer outgrowth, in Part 3 we appraise how physical activity affects the determinants of a successful T cell response against immunogenic cancer cells. Using the cancer immunogram as a basis for this evaluation, we assess the effects of physical activity on: (i) general T cell status in blood, (ii) T cell infiltration to tissues, (iii) presence of immune checkpoints associated with T cell exhaustion and anergy, (iv) presence of inflammatory inhibitors of T cells and (v) presence of metabolic inhibitors of T cells. The extent to which physical activity alters these determinants to reduce the risk of clinically diagnosed cancers - and whether physical activity changes these determinants in an interconnected or unrelated manner - is unresolved. Accordingly, we analyse how physical activity might alter each determinant, and we show how these changes may interconnect to explain how physical activity alters T cell regulation to prevent cancer outgrowth.
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Affiliation(s)
- Annabelle Emery
- Department for Health, University of Bath, Bath, United Kingdom
| | - Sally Moore
- Department of Haematology, Royal United Hospitals Bath NHS Foundation Trust, Bath, United Kingdom
| | - James E Turner
- Department for Health, University of Bath, Bath, United Kingdom
| | - John P Campbell
- Department for Health, University of Bath, Bath, United Kingdom
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Cui JW, Hong Y, Kuo YM, Yu SH, Wu XB, Cui ZY, Lee SD. Voluntary exercise training attenuated the middle-aged maturity-induced cardiac apoptosis. Life Sci 2020; 259:118187. [PMID: 32781061 DOI: 10.1016/j.lfs.2020.118187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 07/23/2020] [Accepted: 07/29/2020] [Indexed: 11/18/2022]
Abstract
AIMS Voluntary exercise training has cardioprotective effects in humans, but the underlying mechanism is unknown. This research was done to estimate the effect of voluntary exercise training to attenuate middle-aged maturity-induced cardiac apoptosis. MATERIALS AND METHODS The study was designed to divide 64 male mice randomly into four groups, consisting of a 9-month sedentary pre-middle-aged group (9M), 15-month sedentary middle-aged group (15M), and two exercise groups using a voluntary wheel running respectively (9M+EX, 15M+EX). After 3 months, the condition of cardiac apoptosis in different groups was measured by HE dying, TUNEL and DAPI staining, and Western Blot analysis. KEY FINDINGS TUNEL-positive cells were increased in 15M group compared with 9M group, while decreased in 9M+EX and 15M+EX groups compared with their control groups respectively. Protein levels of AIF, Endo G, TNF-α, TNFR1, TRAF2, TRADD, Fas, FasL, FADD, activated caspase 8, 3, 9, Bax/Bcl2, Bak/BclxL, and tBid were decreased in 9M+EX and 15M+EX groups compared with their control groups respectively. The protein levels of pBad/Bad, 14-3-3, IGF1, IGFR1, pPI3K/PI3K, and pAKT/AKT were more activated in the 9M+EX and 15M+EX groups than those in their control groups respectively. Significant differences were found between 9M group and 15M group for the protein levels of TRAF2, FADD, Bax/Bcl2, tBid and pAKT/AKT. SIGNIFICANCE Voluntary exercise training as an important lifestyle modification may prevent cardiac widely dispersed apoptosis and enhance cardiac survival at middle-aged maturity.
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Affiliation(s)
- Jia-Wen Cui
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China; Institute of Rehabilitation Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Yi Hong
- The First Rehabilitation Hospital of Shanghai, Shanghai, China
| | - Yu-Min Kuo
- Institute of Basic Medical Sciences, College of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shao-Hong Yu
- College of Rehabilitation, Shandong University of Traditional Chinese Medicine, Shandong, China
| | - Xu-Bo Wu
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China; Departmental of Rehabilitation, Seventh People's Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Zhen-Yang Cui
- School of Rehabilitation Medicine, Weifang Medical University, Shandong, China
| | - Shin-Da Lee
- School of Rehabilitation Science, Shanghai University of Traditional Chinese Medicine, Shanghai, China; College of Rehabilitation, Shandong University of Traditional Chinese Medicine, Shandong, China; Departmental of Rehabilitation, Seventh People's Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China; School of Rehabilitation Medicine, Weifang Medical University, Shandong, China; Department of Physical Therapy, Asia University, Taichung, Taiwan; Department of Physical Therapy, Graduate Institute of Rehabilitation Science, China Medical University, Taichung, Taiwan.
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Biro PA, Thomas F, Ujvari B, Beckmann C. Can Energetic Capacity Help Explain Why Physical Activity Reduces Cancer Risk? Trends Cancer 2020; 6:829-837. [PMID: 32601046 DOI: 10.1016/j.trecan.2020.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/14/2020] [Accepted: 06/03/2020] [Indexed: 12/22/2022]
Abstract
Increased physical activity reduces cancer risk in humans, but why this whole-organism attribute reduces cancer remains unclear. Active individuals tend to have high capacity to generate energy on a sustained basis, which in turn can permit greater immune responses crucial for fighting emerging neoplasia. Thus, we suggest energetic capacity as a potential mechanism to explain the activity-cancer link, given that humans are intrinsically (not externally) energy limited. Human and rodent studies show that individuals with high energetic capacity mount greater immune responses and have lower cancer incidence; these trends persist after controlling for actual physical activity, supporting a direct role of energetic capacity. If true, exercise efforts might best target those that increase one's energetic capacity, which may be both individual and exercise specific.
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Affiliation(s)
- Peter A Biro
- Centre for Integrative Ecology, School of Life and Environmental Science, Deakin University, Geelong, VIC 3216, Australia.
| | - Frédéric Thomas
- CREEC, UMR IRD/CNRS/UM 5290, 911 Avenue Agropolis, BP 64501, 34394 Montpellier Cedex 5, France
| | - Beata Ujvari
- Centre for Integrative Ecology, School of Life and Environmental Science, Deakin University, Geelong, VIC 3216, Australia
| | - Christa Beckmann
- Centre for Integrative Ecology, School of Life and Environmental Science, Deakin University, Geelong, VIC 3216, Australia; School of Science, Western Sydney University, Parramatta, NSW 2116, Australia
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Dupuis C, Berthon J, Larue J, Rougé S, Filaire M, Filaire E. Effects of 6 weeks of betaine or C-phycocyanin supplementation associated or not with wheel running on redox status. Sci Sports 2018. [DOI: 10.1016/j.scispo.2017.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Swimming exercise prevents behavioural disturbances induced by an intracerebroventricular injection of amyloid-β 1-42 peptide through modulation of cytokine/NF-kappaB pathway and indoleamine-2,3-dioxygenase in mouse brain. Behav Brain Res 2017; 331:1-13. [DOI: 10.1016/j.bbr.2017.05.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2017] [Revised: 05/06/2017] [Accepted: 05/10/2017] [Indexed: 12/15/2022]
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Ashcraft KA, Peace RM, Betof AS, Dewhirst MW, Jones LW. Efficacy and Mechanisms of Aerobic Exercise on Cancer Initiation, Progression, and Metastasis: A Critical Systematic Review of In Vivo Preclinical Data. Cancer Res 2016; 76:4032-50. [PMID: 27381680 DOI: 10.1158/0008-5472.can-16-0887] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Accepted: 04/21/2016] [Indexed: 12/13/2022]
Abstract
A major objective of the emerging field of exercise-oncology research is to determine the efficacy of, and biological mechanisms by which, aerobic exercise affects cancer incidence, progression, and/or metastasis. There is a strong inverse association between self-reported exercise and the primary incidence of several forms of cancer; similarly, emerging data suggest that exercise exposure after a cancer diagnosis may improve outcomes for early-stage breast, colorectal, or prostate cancer. Arguably, critical next steps in the development of exercise as a candidate treatment in cancer control require preclinical studies to validate the biological efficacy of exercise, identify the optimal "dose", and pinpoint mechanisms of action. To evaluate the current evidence base, we conducted a critical systematic review of in vivo studies investigating the effects of exercise in cancer prevention and progression. Studies were evaluated on the basis of tumor outcomes (e.g., incidence, growth, latency, metastasis), dose-response, and mechanisms of action, when available. A total of 53 studies were identified and evaluated on tumor incidence (n = 24), tumor growth (n = 33), or metastasis (n = 10). We report that the current evidence base is plagued by considerable methodologic heterogeneity in all aspects of study design, endpoints, and efficacy. Such heterogeneity precludes meaningful comparisons and conclusions at present. To this end, we provide a framework of methodologic and data reporting standards to strengthen the field to guide the conduct of high-quality studies required to inform translational, mechanism-driven clinical trials. Cancer Res; 76(14); 4032-50. ©2016 AACR.
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Affiliation(s)
| | - Ralph M Peace
- Duke University Medical Center, Durham, North Carolina
| | | | | | - Lee W Jones
- Memorial Sloan Kettering Cancer Center, New York, New York.
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Mika A, Van Treuren W, González A, Herrera JJ, Knight R, Fleshner M. Exercise is More Effective at Altering Gut Microbial Composition and Producing Stable Changes in Lean Mass in Juvenile versus Adult Male F344 Rats. PLoS One 2015; 10:e0125889. [PMID: 26016739 PMCID: PMC4446322 DOI: 10.1371/journal.pone.0125889] [Citation(s) in RCA: 129] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 03/23/2015] [Indexed: 02/07/2023] Open
Abstract
The mammalian intestine harbors a complex microbial ecosystem that influences many aspects of host physiology. Exposure to specific microbes early in development affects host metabolism, immune function, and behavior across the lifespan. Just as the physiology of the developing organism undergoes a period of plasticity, the developing microbial ecosystem is characterized by instability and may also be more sensitive to change. Early life thus presents a window of opportunity for manipulations that produce adaptive changes in microbial composition. Recent insights have revealed that increasing physical activity can increase the abundance of beneficial microbial species. We therefore investigated whether six weeks of wheel running initiated in the juvenile period (postnatal day 24) would produce more robust and stable changes in microbial communities versus exercise initiated in adulthood (postnatal day 70) in male F344 rats. 16S rRNA gene sequencing was used to characterize the microbial composition of juvenile versus adult runners and their sedentary counterparts across multiple time points during exercise and following exercise cessation. Alpha diversity measures revealed that the microbial communities of young runners were less even and diverse, a community structure that reflects volatility and malleability. Juvenile onset exercise altered several phyla and, notably, increased Bacteroidetes and decreased Firmicutes, a configuration associated with leanness. At the genus level of taxonomy, exercise altered more genera in juveniles than in the adults and produced patterns associated with adaptive metabolic consequences. Given the potential of these changes to contribute to a lean phenotype, we examined body composition in juvenile versus adult runners. Interestingly, exercise produced persistent increases in lean body mass in juvenile but not adult runners. Taken together, these results indicate that the impact of exercise on gut microbiota composition as well as body composition may depend on the developmental stage during which exercise is initiated.
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Affiliation(s)
- Agnieszka Mika
- Department of Integrative Physiology and the Center for Neuroscience, University of Colorado, Boulder, Colorado, 80301, United States of America
| | - Will Van Treuren
- Department of Microbiology and Immunology, Stanford University, Stanford, California, 94305, United States of America
| | - Antonio González
- Departments of Pediatrics, University of California San Diego, La Jolla, California, 29093, United States of America
| | - Jonathan J. Herrera
- Department of Integrative Physiology and the Center for Neuroscience, University of Colorado, Boulder, Colorado, 80301, United States of America
| | - Rob Knight
- Departments of Pediatrics, University of California San Diego, La Jolla, California, 29093, United States of America
- Computer Science & Engineering, University of California San Diego, La Jolla, California, 29093, United States of America
| | - Monika Fleshner
- Department of Integrative Physiology and the Center for Neuroscience, University of Colorado, Boulder, Colorado, 80301, United States of America
- * E-mail:
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Neuroprotective effects of swimming training in a mouse model of Parkinson’s disease induced by 6-hydroxydopamine. Neuroscience 2014; 256:61-71. [DOI: 10.1016/j.neuroscience.2013.09.042] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 08/29/2013] [Accepted: 09/20/2013] [Indexed: 01/08/2023]
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STEINER J, DAVIS J, McCLELLAN J, ENOS R, MURPHY E. Effects of voluntary exercise on tumorigenesis in the C3(1)/SV40Tag transgenic mouse model of breast cancer. Int J Oncol 2013; 42:1466-72. [DOI: 10.3892/ijo.2013.1827] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Accepted: 01/16/2013] [Indexed: 11/06/2022] Open
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Souza LC, Filho CB, Goes ATR, Fabbro LD, de Gomes MG, Savegnago L, Oliveira MS, Jesse CR. Neuroprotective Effect of Physical Exercise in a Mouse Model of Alzheimer’s Disease Induced by β-Amyloid1–40 Peptide. Neurotox Res 2013; 24:148-63. [DOI: 10.1007/s12640-012-9373-0] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 12/04/2012] [Accepted: 12/28/2012] [Indexed: 12/18/2022]
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