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Markozannes G, Becerra-Tomás N, Cariolou M, Balducci K, Vieira R, Kiss S, Aune D, Greenwood DC, Gunter MJ, Copson E, Renehan AG, Bours M, Demark-Wahnefried W, Hudson MM, May AM, Odedina FT, Skinner R, Steindorf K, Tjønneland A, Velikova G, Baskin ML, Chowdhury R, Hill L, Lewis SJ, Seidell J, Weijenberg MP, Krebs J, Cross AJ, Tsilidis KK, Chan DSM. Post-diagnosis physical activity and sedentary behaviour and colorectal cancer prognosis: A Global Cancer Update Programme (CUP Global) systematic literature review and meta-analysis. Int J Cancer 2024; 155:426-444. [PMID: 38692650 DOI: 10.1002/ijc.34903] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 12/15/2023] [Accepted: 01/17/2024] [Indexed: 05/03/2024]
Abstract
Low physical activity and high sedentary behaviour have been clearly linked with colorectal cancer development, yet data on their potential role in colorectal cancer survival is limited. Better characterisation of these relationships is needed for the development of post-diagnosis physical activity and sedentary behaviour guidance for colorectal cancer survivors. We searched PubMed and Embase through 28 February 2022 for studies assessing post-diagnosis physical activity, and/or sedentary behaviour in relation to all-cause and cause-specific mortality and recurrence after colorectal cancer diagnosis. Total and recreational physical activity were assessed overall and by frequency, duration, intensity, and volume using categorical, linear, and non-linear dose-response random-effects meta-analyses. The Global Cancer Update Programme (CUP Global) independent Expert Committee on Cancer Survivorship and Expert Panel interpreted and graded the likelihood of causality. We identified 16 observational studies on 82,220 non-overlapping patients from six countries. Physical activity was consistently inversely associated with colorectal cancer morbidity and mortality outcomes, with 13%-60% estimated reductions in risk. Sedentary behaviour was positively associated with all-cause mortality. The evidence had methodological limitations including potential confounding, selection bias and reverse causation, coupled with a limited number of studies for most associations. The CUP Global Expert panel concluded limited-suggestive evidence for recreational physical activity with all-cause mortality and cancer recurrence. Total physical activity and its specific domains and dimensions, and sedentary behaviour were all graded as limited-no conclusion for all outcomes. Future research should focus on randomised trials, while observational studies should obtain objective and repeated physical activity measures and better adjustment for confounders.
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Affiliation(s)
- Georgios Markozannes
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
- Department of Hygiene and Epidemiology, University of Ioannina Medical School, Ioannina, Greece
| | - Nerea Becerra-Tomás
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Margarita Cariolou
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Katia Balducci
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Rita Vieira
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Sonia Kiss
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Dagfinn Aune
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
- Department of Nutrition, Oslo New University College, Oslo, Norway
- Department of Research, The Cancer Registry of Norway, Oslo, Norway
| | - Darren C Greenwood
- Leeds Institute for Data Analytics, Faculty of Medicine and Health, University of Leeds, Leeds, UK
| | - Marc J Gunter
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
- Nutrition and Metabolism Branch, International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Ellen Copson
- Cancer Sciences Academic Unit, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Andrew G Renehan
- The Christie NHS Foundation Trust, Manchester Cancer Research Centre, NIHR Manchester Biomedical Research Centre, Division of Cancer Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | - Martijn Bours
- Department of Epidemiology, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - Wendy Demark-Wahnefried
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Melissa M Hudson
- Department of Oncology, St Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - Anne M May
- Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | | | - Roderick Skinner
- Department of Paediatric and Adolescent Haematology/Oncology, Great North Children's Hospital and Translational and Clinical Research Institute, and Centre for Cancer, Newcastle University, Newcastle upon Tyne, UK
| | - Karen Steindorf
- Division of Physical Activity, Prevention and Cancer, German Cancer Research Center (DKFZ) and National Center for Tumor Diseases (NCT), Heidelberg, Germany
| | - Anne Tjønneland
- Danish Cancer Society Research Center, Diet, Cancer and Health, Copenhagen, Denmark
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Galina Velikova
- School of Medicine, Faculty of Medicine and Health, University of Leeds, Leeds, UK
| | | | - Rajiv Chowdhury
- Department of Global Health, Robert Stempel College of Public Health and Social Work, Florida International University, Miami, Florida, USA
| | - Lynette Hill
- World Cancer Research Fund International, London, UK
| | - Sarah J Lewis
- Department of Population Health Sciences, Bristol Medical School, University of Bristol, Bristol, UK
| | - Jaap Seidell
- Department of Health Sciences, Faculty of Science, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
| | - Matty P Weijenberg
- Department of Epidemiology, GROW School for Oncology and Reproduction, Maastricht University, Maastricht, The Netherlands
| | - John Krebs
- Department of Biology, University of Oxford, Oxford, UK
| | - Amanda J Cross
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Konstantinos K Tsilidis
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
- Department of Hygiene and Epidemiology, University of Ioannina Medical School, Ioannina, Greece
| | - Doris S M Chan
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
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Kim JS, Taaffe DR, Galvão DA, Clay TD, Redfern AD, Gray ES, Newton RU. Enhancing circulatory myokines and extracellular vesicle uptake with targeted exercise in patients with prostate cancer (the MYEX trial): a single-group crossover study. BMC Cancer 2024; 24:784. [PMID: 38951803 PMCID: PMC11218391 DOI: 10.1186/s12885-024-12530-0] [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: 05/27/2024] [Accepted: 06/17/2024] [Indexed: 07/03/2024] Open
Abstract
INTRODUCTION Physical activity is associated with improved disease progression and cancer-specific survival in patients with prostate cancer (PCa). However, the mechanisms underlying these associations remain unclear, while the relative impact of exercise modes is unknown. This study aims to examine the differential impact of exercise mode on tumour-suppressive skeletal muscle-associated systemic molecules as well as their delivery mechanism. This study will compare the effects of the two main exercise modes, aerobic and resistance, on (1) circulatory myokine levels, (2) skeletal muscle-induced extracellular vesicle abundance and cargo contents, and (3) uptake of extracellular vesicles (EVs) in PCa cells in patients with localised or advanced PCa. METHODS A single-group cross-over design will be used for patients at opposite ends of the disease spectrum. A total of 32 patients (localised PCa, n = 16; metastatic castrate-resistant PCa, n = 16) will be recruited while capitalising on two ongoing studies. Ethics amendment has been approved for two ongoing trials to share data, implement the acute exercise sessions, and collect additional blood samples from patients. The patients will undertake two exercise sessions (aerobic only and resistance only) in random order one week apart. Blood will be collected before, after, and 30 min post-exercise. Circulating/EV-contained myokine levels (irisin, IL-6, IL-15, FGF-21, and SPARC) and plasma skeletal muscle-induced EVs will be measured using ELISA and flow cytometry. PCa cell line growth with or without collected plasma will be examined using PCa cell lines (LNCaP, DU-145, and PC-3), while evaluating cellular uptake of EVs. Ethics amendments have been approved for two capitalising studies to share data, implement acute exercise sessions and collect additional samples from the patients. DISCUSSION If findings show a differential impact of exercise mode on the establishment of an anti-cancer systemic environment, this will provide fundamental knowledge for developing targeted exercise prescriptions for patients with PCa across different disease stages. Findings will be reported in peer-reviewed publications and scientific conferences, in addition to working with national support groups to translate findings for the broader community. TRIAL REGISTRATION The registration for the two capitalising studies are NCT02730338 and ACTRN12618000225213.
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Affiliation(s)
- Jin-Soo Kim
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, WA, Australia
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Dennis R Taaffe
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, WA, Australia
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Daniel A Galvão
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, WA, Australia
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
| | - Timothy D Clay
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, WA, Australia
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
- Department of Medical Oncology, St John of God Subiaco Hospital, Perth, WA, Australia
| | - Andrew D Redfern
- Department of Medical Oncology, Fiona Stanley Hospital, Murdoch, WA, Australia
- School of Medicine and Pharmacology, University of Western Australia, Perth, WA, Australia
| | - Elin S Gray
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia
- Centre for Precision Health, Edith Cowan University, Joondalup, WA, Australia
| | - Robert U Newton
- Exercise Medicine Research Institute, Edith Cowan University, Joondalup, WA, Australia.
- School of Medical and Health Sciences, Edith Cowan University, Joondalup, WA, Australia.
- School of Human Movement and Nutrition Sciences, University of Queensland, St Lucia, QLD, Australia.
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Pinto AC, Tavares P, Neves B, Oliveira PF, Vitorino R, Moreira-Gonçalves D, Ferreira R. Exploiting the therapeutic potential of contracting skeletal muscle-released extracellular vesicles in cancer: Current insights and future directions. J Mol Med (Berl) 2024; 102:617-628. [PMID: 38451309 PMCID: PMC11055777 DOI: 10.1007/s00109-024-02427-7] [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: 09/26/2023] [Revised: 01/09/2024] [Accepted: 02/05/2024] [Indexed: 03/08/2024]
Abstract
The health benefits of exercise training in a cancer setting are increasingly acknowledged; however, the underlying molecular mechanisms remain poorly understood. It has been suggested that extracellular vesicles (EVs) released from contracting skeletal muscles play a key role in mediating the systemic benefits of exercise by transporting bioactive molecules, including myokines. Nevertheless, skeletal muscle-derived vesicles account for only about 5% of plasma EVs, with the immune cells making the largest contribution. Moreover, it remains unclear whether the contribution of skeletal muscle-derived EVs increases after physical exercise or how muscle contraction modulates the secretory activity of other tissues and thus influences the content and profile of circulating EVs. Furthermore, the destination of EVs after exercise is unknown, and it depends on their molecular composition, particularly adhesion proteins. The cargo of EVs is influenced by the training program, with acute training sessions having a greater impact than chronic adaptations. Indeed, there are numerous questions regarding the role of EVs in mediating the effects of exercise, the clarification of which is critical for tailoring exercise training prescriptions and designing exercise mimetics for patients unable to engage in exercise programs. This review critically analyzes the current knowledge on the effects of exercise on the content and molecular composition of circulating EVs and their impact on cancer progression.
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Affiliation(s)
- Ana Carolina Pinto
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Patrícia Tavares
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
- iBiMED, Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal
- CIAFEL, Faculty of Sports, University of Porto and Laboratory for Integrative and ITR, Translational Research in Population Health, 4200-450, Porto, Portugal
| | - Bruno Neves
- iBiMED, Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Pedro F Oliveira
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal
| | - Rui Vitorino
- iBiMED, Department of Medical Sciences, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Daniel Moreira-Gonçalves
- CIAFEL, Faculty of Sports, University of Porto and Laboratory for Integrative and ITR, Translational Research in Population Health, 4200-450, Porto, Portugal
| | - Rita Ferreira
- LAQV-REQUIMTE and Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
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Zhu Q, Xiong X, Zheng Q, Deng Q, Hao Y, Liu D, Zheng J, Zhang G, Li J, Yang L. High-intensity interval training versus moderate-intensity continuous training for localized prostate cancer under active surveillance: a systematic review and network meta-analysis. Prostate Cancer Prostatic Dis 2024:10.1038/s41391-024-00801-7. [PMID: 38378977 DOI: 10.1038/s41391-024-00801-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 01/21/2024] [Accepted: 01/25/2024] [Indexed: 02/22/2024]
Abstract
BACKGROUND High-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) have been increasingly adopted for localized prostate cancer (PCa) under active surveillance (AS). However, it is unclear which training modality is the most favorable in terms of cardiorespiratory fitness and biochemical progression. METHODS We searched PubMed, Cochrane and Embase for relevant RCTs. PRISMA guideline was adopted to ensure optimal conduct of this study. Serum prostate specific antigen (PSA) and peak VO2 were selected as primary outcomes and PSA doubling time (PSADT) and testosterone were selected as secondary outcomes. Only articles written in English were included. Cochrane risk-of-bias tool was used for risk of bias evaluation. RESULTS A total of 501 studies were selected. Six RCTs with 222 patients were included for data extraction and analysis. High-intensity interval training (HIIT) group demonstrated significantly lower PSA compared with usual care (UC) (MD = -1.4; 95%CI = -2.77 to -0.03) and moderate-intensity continuous training (MICT) group (MD = -1.67; 95%CI = -3.30 to -0.05). Both HIIT and MICT showed significantly improved peak VO2 compared with UC. No significant difference was observed in PSADT and testosterone among different training modalities and UC. Regarding peak VO2, MICT had the highest surface under cumulative ranking curve (SUCRA) scores (98.1%). For serum PSA, HIIT had the highest probability (97.8%) to be the training with the highest efficacy. The potential source of bias mainly came from poorly performed allocation concealment and blinding strategies. CONCLUSIONS The present study indicated that HIIT and MICT showed considerable cardiorespiratory benefits for localized PCa. HIIT was preferred over MICT in biochemical progression control in terms of decreasing serum PSA levels. However, MICT was favored over HIIT regarding cardiorespiratory benefits. The findings of this study may facilitate future lifestyle intervention, particularly in the form of physical training, for individuals diagnosed with localized PCa under AS.
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Affiliation(s)
- Qiyu Zhu
- Department of Urology, Institute of Urology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan, PR China
| | - Xingyu Xiong
- Department of Urology, Institute of Urology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan, PR China
| | - Qian Zheng
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, PR China
| | - Qi Deng
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, PR China
| | - Yun Hao
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, PR China
| | - Dingbang Liu
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, PR China
| | - Jiaming Zheng
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, PR China
| | - Guangyue Zhang
- West China School of Medicine, Sichuan University, Chengdu, Sichuan, PR China
| | - Jiakun Li
- Department of Urology, Institute of Urology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan, PR China.
| | - Lu Yang
- Department of Urology, Institute of Urology, West China Hospital of Sichuan University, No. 37, Guoxue Alley, Chengdu, Sichuan, PR China.
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Delgado-Peraza F, Nogueras-Ortiz C, Simonsen AH, Knight DD, Yao PJ, Goetzl EJ, Jensen CS, Høgh P, Gottrup H, Vestergaard K, Hasselbalch SG, Kapogiannis D. Neuron-derived extracellular vesicles in blood reveal effects of exercise in Alzheimer's disease. Alzheimers Res Ther 2023; 15:156. [PMID: 37730689 PMCID: PMC10510190 DOI: 10.1186/s13195-023-01303-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 09/08/2023] [Indexed: 09/22/2023]
Abstract
BACKGROUND Neuron-derived extracellular vesicles (NDEVs) in blood may be used to derive biomarkers for the effects of exercise in Alzheimer's disease (AD). For this purpose, we studied changes in neuroprotective proteins proBDNF, BDNF, and humanin in plasma NDEVs from patients with mild to moderate AD participating in the randomized controlled trial (RCT) of exercise ADEX. METHODS proBDNF, BDNF, and humanin were quantified in NDEVs immunocaptured from the plasma of 95 ADEX participants, randomized into exercise and control groups, and collected at baseline and 16 weeks. Exploratorily, we also quantified NDEV levels of putative exerkines known to respond to exercise in peripheral tissues. RESULTS NDEV levels of proBDNF, BDNF, and humanin increased in the exercise group, especially in APOE ε4 carriers, but remained unchanged in the control group. Inter-correlations between NDEV biomarkers observed at baseline were maintained after exercise. NDEV levels of putative exerkines remained unchanged. CONCLUSIONS Findings suggest that the cognitive benefits of exercise could be mediated by the upregulation of neuroprotective factors in NDEVs. Additionally, our results indicate that AD subjects carrying APOE ε4 are more responsive to the neuroprotective effects of physical activity. Unchanged NDEV levels of putative exerkines after physical activity imply that exercise engages different pathways in neurons and peripheral tissues. Future studies should aim to expand upon the effects of exercise duration, intensity, and type in NDEVs from patients with early AD and additional neurodegenerative disorders. TRIAL REGISTRATION The Effect of Physical Exercise in Alzheimer Patients (ADEX) was registered in ClinicalTrials.gov on April 30, 2012 with the identifier NCT01681602.
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Affiliation(s)
- Francheska Delgado-Peraza
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute On Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Carlos Nogueras-Ortiz
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute On Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Anja Hviid Simonsen
- Danish Dementia Research Centre, Copenhagen University Hospital - Rigshospitalet, 2100, Copenhagen, Denmark
| | - De'Larrian DeAnté Knight
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute On Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Pamela J Yao
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute On Aging, National Institutes of Health, Baltimore, MD, 21224, USA
| | - Edward J Goetzl
- Department of Medicine, University of California San Francisco, San Francisco, CA, 94143, USA
- Research Department, Campus for Jewish Living, San Francisco, CA, 94112, USA
| | - Camilla Steen Jensen
- Danish Dementia Research Centre, Copenhagen University Hospital - Rigshospitalet, 2100, Copenhagen, Denmark
| | - Peter Høgh
- Department of Neurology, Zealand University Hospital, 4000, Roskilde, Denmark
- Department of Clinical Medicine, University of Copenhagen, 1165, Copenhagen, Denmark
| | - Hanne Gottrup
- Department of Neurology, Dementia Clinic, Aarhus University Hospital, 8200, Aarhus, Denmark
| | - Karsten Vestergaard
- Department of Neurology, Dementia Clinic, Aalborg University Hospital, 9000, Aalborg, Denmark
| | - Steen Gregers Hasselbalch
- Danish Dementia Research Centre, Copenhagen University Hospital - Rigshospitalet, 2100, Copenhagen, Denmark.
| | - Dimitrios Kapogiannis
- Laboratory of Clinical Investigation, Intramural Research Program, National Institute On Aging, National Institutes of Health, Baltimore, MD, 21224, USA.
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Vann CG, Zhang X, Khodabukus A, Orenduff MC, Chen YH, Corcoran DL, Truskey GA, Bursac N, Kraus VB. Differential microRNA profiles of intramuscular and secreted extracellular vesicles in human tissue-engineered muscle. Front Physiol 2022; 13:937899. [PMID: 36091396 PMCID: PMC9452896 DOI: 10.3389/fphys.2022.937899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 07/11/2022] [Indexed: 11/13/2022] Open
Abstract
Exercise affects the expression of microRNAs (miR/s) and muscle-derived extracellular vesicles (EVs). To evaluate sarcoplasmic and secreted miR expression in human skeletal muscle in response to exercise-mimetic contractile activity, we utilized a three-dimensional tissue-engineered model of human skeletal muscle ("myobundles"). Myobundles were subjected to three culture conditions: no electrical stimulation (CTL), chronic low frequency stimulation (CLFS), or intermittent high frequency stimulation (IHFS) for 7 days. RNA was isolated from myobundles and from extracellular vesicles (EVs) secreted by myobundles into culture media; miR abundance was analyzed by miRNA-sequencing. We used edgeR and a within-sample design to evaluate differential miR expression and Pearson correlation to evaluate correlations between myobundle and EV populations within treatments with statistical significance set at p < 0.05. Numerous miRs were differentially expressed between myobundles and EVs; 116 miRs were differentially expressed within CTL, 3 within CLFS, and 2 within IHFS. Additionally, 25 miRs were significantly correlated (18 in CTL, 5 in CLFS, 2 in IHFS) between myobundles and EVs. Electrical stimulation resulted in differential expression of 8 miRs in myobundles and only 1 miR in EVs. Several KEGG pathways, known to play a role in regulation of skeletal muscle, were enriched, with differentially overrepresented miRs between myobundle and EV populations identified using miEAA. Together, these results demonstrate that in vitro exercise-mimetic contractile activity of human engineered muscle affects both their expression of miRs and number of secreted EVs. These results also identify novel miRs of interest for future studies of the role of exercise in organ-organ interactions in vivo.
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Affiliation(s)
- Christopher G Vann
- Duke Molecular Physiology Institute, Duke University School of Medicine, Duke University, Durham, NC, United States
| | - Xin Zhang
- Duke Molecular Physiology Institute, Duke University School of Medicine, Duke University, Durham, NC, United States.,Department of Orthopaedic Surgery, Duke University School of Medicine, Duke University, Durham, NC, United States
| | - Alastair Khodabukus
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
| | - Melissa C Orenduff
- Duke Molecular Physiology Institute, Duke University School of Medicine, Duke University, Durham, NC, United States
| | - Yu-Hsiu Chen
- Duke Molecular Physiology Institute, Duke University School of Medicine, Duke University, Durham, NC, United States
| | - David L Corcoran
- Department of Genetics, University of North Carolina School of Medicine, University of North Carolina, Chapel Hill, NC, United States
| | - George A Truskey
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
| | - Nenad Bursac
- Department of Biomedical Engineering, Pratt School of Engineering, Duke University, Durham, NC, United States
| | - Virginia B Kraus
- Duke Molecular Physiology Institute, Duke University School of Medicine, Duke University, Durham, NC, United States.,Department of Orthopaedic Surgery, Duke University School of Medicine, Duke University, Durham, NC, United States.,Department of Medicine, Duke University School of Medicine, Duke University, Durham, NC, United States
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