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Ahmadi Hekmatikar A, Nelson A, Petersen A. Highlighting the idea of exerkines in the management of cancer patients with cachexia: novel insights and a critical review. BMC Cancer 2023; 23:889. [PMID: 37730552 PMCID: PMC10512651 DOI: 10.1186/s12885-023-11391-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 09/10/2023] [Indexed: 09/22/2023] Open
Abstract
BACKGROUND Exerkines are all peptides, metabolites, and nucleic acids released into the bloodstream during and after physical exercise. Exerkines liberated from skeletal muscle (myokines), the heart (cardiokines), liver (hepatokines), white adipose tissue (adipokines), brown adipose tissue (batokines), and neurons (neurokines) may benefit health and wellbeing. Cancer-related cachexia is a highly prevalent disorder characterized by weight loss with specific skeletal muscle and adipose tissue loss. Many studies have sought to provide exercise strategies for managing cachexia, focusing on musculoskeletal tissue changes. Therefore, understanding the responses of musculoskeletal and other tissue exerkines to acute and chronic exercise may provide novel insight and recommendations for physical training to counteract cancer-related cachexia. METHODS For the purpose of conducting this study review, we made efforts to gather relevant studies and thoroughly discuss them to create a comprehensive overview. To achieve this, we conducted searches using appropriate keywords in various databases. Studies that were deemed irrelevant to the current research, not available in English, or lacking full-text access were excluded. Nevertheless, it is important to acknowledge the limited amount of research conducted in this specific field. RESULTS In order to obtain a comprehensive understanding of the findings, we prioritized human studies in order to obtain results that closely align with the scope of the present study. However, in instances where human studies were limited or additional analysis was required to draw more robust conclusions, we also incorporated animal studies. Finally, 295 studies, discussed in this review. CONCLUSION Our understanding of the underlying physiological mechanisms related to the significance of investigating exerkines in cancer cachexia is currently quite basic. Nonetheless, this demonstrated that resistance and aerobic exercise can contribute to the reduction and control of the disease in individuals with cancer cachexia, as well as in survivors, by inducing changes in exerkines.
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Affiliation(s)
- Amirhossein Ahmadi Hekmatikar
- Department of Physical Education & Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran, 14117-13116, Iran
| | - André Nelson
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Aaron Petersen
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia.
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Suzuki K, Hekmatikar AHA, Jalalian S, Abbasi S, Ahmadi E, Kazemi A, Ruhee RT, Khoramipour K. The Potential of Exerkines in Women's COVID-19: A New Idea for a Better and More Accurate Understanding of the Mechanisms behind Physical Exercise. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph192315645. [PMID: 36497720 PMCID: PMC9737724 DOI: 10.3390/ijerph192315645] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/19/2022] [Accepted: 11/21/2022] [Indexed: 05/31/2023]
Abstract
The benefits of physical exercise are well-known, but there are still many questions regarding COVID-19. Chow et al.'s 2022 study, titled Exerkines and Disease, showed that a special focus on exerkines can help to better understand the underlying mechanisms of physical exercise and disease. Exerkines are a group of promising molecules that may underlie the beneficial effects of physical exercise in diseases. The idea of exerkines is to understand the effects of physical exercise on diseases better. Exerkines have a high potential for the treatment of diseases and, considering that, there is still no study of the importance of exerkines on the most dangerous disease in the world in recent years, COVID-19. This raises the fundamental question of whether exerkines have the potential to manage COVID-19. Most of the studies focused on the general changes in physical exercise in patients with COVID-19, both during the illness and after discharge from the hospital, and did not investigate the basic differences. A unique look at the management of COVID-19 by exerkines, especially in obese and overweight women who experience high severity of COVID-19 and whose recovery period is long after discharge from the hospital, can help to understand the basic mechanisms. In this review, we explore the potential of exerkines in COVID-19 by practicing physical exercise to provide compelling practice recommendations with new insights.
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Affiliation(s)
- Katsuhiko Suzuki
- Faculty of Sport Sciences, Waseda University, Tokorozawa 359-1192, Japan
| | - Amir Hossein Ahmadi Hekmatikar
- Department of Physical Education and Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran 10600, Iran
| | - Shadi Jalalian
- Department of Physical Education and Sport Sciences, Science and Research Branch, Islamic Azad University, Tehran 10600, Iran
| | - Shaghayegh Abbasi
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, Kharazmi University, Tehran 10600, Iran
| | - Elmira Ahmadi
- Department of Physical Education and Sport Sciences, Faculty of Humanities, Tarbiat Modares University, Tehran 10600, Iran
| | - Abdolreza Kazemi
- Department of Sports Science, Faculty of Literature and Humanities, Vali-e-Asr University, Rafsanjan 7718897111, Iran
| | | | - Kayvan Khoramipour
- Neuroscience Research Center, Institute of Neuropharmacology, Department of Physiology, Afzalipour School of Medicine, Kerman University of Medical Sciences, Kerman 7616914115, Iran
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Ballin M, Hult A, Björk S, Dinsmore J, Nordström P, Nordström A. Digital exercise interventions for improving measures of central obesity: a systematic review. Int J Public Health 2020; 65:593-605. [PMID: 32410008 PMCID: PMC7224590 DOI: 10.1007/s00038-020-01385-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/22/2020] [Accepted: 05/02/2020] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVES We aimed to systematically review the potential benefits of digital exercise interventions for improving measures of central obesity including visceral adipose tissue (VAT) and anthropometric surrogates for VAT in overweight or centrally obese adults aged 18 or over. METHODS A systematic literature search was conducted in three databases up until March 2020 (PROSPERO registration nr CRD42019126764). RESULTS N = 5 studies including 438 participants (age 48-80) with body mass index ≥ 25 kg/m2 met the eligibility criteria and were included. The duration of the interventions ranged from 8 to 24 weeks. No study measured the primary outcome VAT, although in N = 4 studies, waist circumference (WC) decreased by between 1.3 and 5.6 cm in the intervention groups. CONCLUSIONS This systematic review shows that there is no evidence for the effects of digital exercise on VAT, although digital exercise may decrease WC. These findings highlight the need for additional randomized controlled trials to confirm the findings with respect to WC, and to further investigate the effects of digital exercise on VAT. Together, this may have important implications for reducing the burden of physical inactivity and obesity.
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Affiliation(s)
- Marcel Ballin
- Department of Community Medicine and Rehabilitation, Unit of Geriatric Medicine, Umeå University, Umeå, Sweden.
- Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå, Sweden.
| | - Andreas Hult
- Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå, Sweden
- Department of Community Medicine and Rehabilitation, Section of Sports Medicine, Umeå University, Umeå, Sweden
| | - Sabine Björk
- Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå, Sweden
- Department of Nursing, Umeå University, Umeå, Sweden
| | - John Dinsmore
- Trinity Centre for Practice and Healthcare Innovation, School of Nursing and Midwifery, Trinity College Dublin, Dublin, Ireland
| | - Peter Nordström
- Department of Community Medicine and Rehabilitation, Unit of Geriatric Medicine, Umeå University, Umeå, Sweden
| | - Anna Nordström
- Department of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umeå, Sweden
- School of Sport Sciences, UiT The Arctic University of Norway, Tromsø, Norway
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Parry M, Dhukai A, Clarke H, Bjørnnes AK, Cafazzo JA, Cooper L, Harvey P, Katz J, Lalloo C, Leegaard M, Légaré F, Lovas M, McFetridge-Durdle J, McGillion M, Norris C, Parente L, Patterson R, Pilote L, Pink L, Price J, Stinson J, Uddin A, Victor JC, Watt-Watson J, Auld C, Faubert C, Park D, Park M, Rickard B, DeBonis VS. Development and usability testing of HEARTPA♀N: protocol for a mixed methods strategy to develop an integrated smartphone and web-based intervention for women with cardiac pain. BMJ Open 2020; 10:e033092. [PMID: 32156763 PMCID: PMC7064127 DOI: 10.1136/bmjopen-2019-033092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
INTRODUCTION More women experience cardiac pain related to coronary artery disease and cardiac procedures compared with men. The overall goal of this programme of research is to develop an integrated smartphone and web-based intervention (HEARTPA♀N) to help women recognise and self-manage cardiac pain. METHODS AND ANALYSIS This protocol outlines the mixed methods strategy used for the development of the HEARTPA♀N content/core feature set (phase 2A), usability testing (phase 2B) and evaluation with a pilot randomised controlled trial (RCT) (phase 3). We are using the individual and family self-management theory, mobile device functionality and pervasive information architecture of mHealth interventions, and following a sequential phased approach recommended by the Medical Research Council to develop HEARTPA♀N. The phase 3 pilot RCT will enable us to refine the prototype, inform the methodology and calculate the sample size for a larger multisite RCT (phase 4, future work). Patient partners have been actively involved in setting the HEARTPA♀N research agenda, including defining patient-reported outcome measures for the pilot RCT: pain and health-related quality of life (HRQoL). As such, the guidelines for Inclusion of Patient-Reported Outcomes in Clinical Trial Protocols (SPIRIT-PRO) are used to report the protocol for the pilot RCT (phase 3). Quantitative data (eg, demographic and clinical information) will be summarised using descriptive statistics (phases 2AB and 3) and a content analysis will be used to identify themes (phase 2AB). A process evaluation will be used to assess the feasibility of the implementation of the intervention and a preliminary efficacy evaluation will be undertaken focusing on the outcomes of pain and HRQoL (phase 3). ETHICS AND DISSEMINATION Ethics approval was obtained from the University of Toronto (36415; 26 November 2018). We will disseminate knowledge of HEARTPA♀N through publication, conference presentation and national public forums (Café Scientifique), and through fact sheets, tweets and webinars. TRIAL REGISTRATION NUMBER NCT03800082.
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Affiliation(s)
- Monica Parry
- University of Toronto Lawrence S Bloomberg Faculty of Nursing, Toronto, Ontario, Canada
| | - Abida Dhukai
- University of Toronto Lawrence S Bloomberg Faculty of Nursing, Toronto, Ontario, Canada
| | - Hance Clarke
- Pain Research Unit, University Health Network, Toronto, Ontario, Canada
- University of Toronto, Toronto, Ontario, Canada
| | - Ann Kristin Bjørnnes
- Department of Nursing and Health Promotion, Oslo Metropolitan University, Oslo, Norway
| | - Joseph A Cafazzo
- University of Toronto, Toronto, Ontario, Canada
- Healthcare Human Factors, University Health Network, Toronto, Ontario, Canada
| | | | - Paula Harvey
- University of Toronto, Toronto, Ontario, Canada
- Women's College Hospital, Toronto, Ontario, Canada
| | - Joel Katz
- Faculty of Health - Department of Psychology, York University, Toronto, Ontario, Canada
| | - Chitra Lalloo
- The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada
| | - Marit Leegaard
- Institute of Nursing, Oslo Metropolitan University, Oslo, Akershus, Norway
| | - France Légaré
- Médecine Familiale, Université Laval, Quebec, Quebec, Canada
| | - Mike Lovas
- Healthcare Human Factors, University Health Network, Toronto, Ontario, Canada
| | | | - Michael McGillion
- Faculty of Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Colleen Norris
- Faculty of Nursing, University of Alberta, Edmonton, Alberta, Canada
| | - Laura Parente
- Healthcare Human Factors, University Health Network, Toronto, Ontario, Canada
| | | | - Louise Pilote
- Medicine, McGill University, Montreal, Quebec, Canada
| | - Leah Pink
- Wasser Pain Management Centre, Sinai Health System, Toronto, Ontario, Canada
| | | | - Jennifer Stinson
- The Peter Gilgan Centre for Research and Learning, Toronto, Ontario, Canada
- Lawrence S Bloomberg Faculty of Nursing, University of Toronto, Toronto, Ontario, Canada
| | - Akib Uddin
- Healthcare Human Factors, University Health Network, Toronto, Ontario, Canada
| | | | - Judy Watt-Watson
- Lawrence S Bloomberg Faculty of Nursing, University of Toronto, Toronto, Ontario, Canada
| | - Carol Auld
- Patient Advisor, Toronto, Ontario, Canada
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Posadzki P, Mastellos N, Ryan R, Gunn LH, Felix LM, Pappas Y, Gagnon M, Julious SA, Xiang L, Oldenburg B, Car J. Automated telephone communication systems for preventive healthcare and management of long-term conditions. Cochrane Database Syst Rev 2016; 12:CD009921. [PMID: 27960229 PMCID: PMC6463821 DOI: 10.1002/14651858.cd009921.pub2] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Automated telephone communication systems (ATCS) can deliver voice messages and collect health-related information from patients using either their telephone's touch-tone keypad or voice recognition software. ATCS can supplement or replace telephone contact between health professionals and patients. There are four different types of ATCS: unidirectional (one-way, non-interactive voice communication), interactive voice response (IVR) systems, ATCS with additional functions such as access to an expert to request advice (ATCS Plus) and multimodal ATCS, where the calls are delivered as part of a multicomponent intervention. OBJECTIVES To assess the effects of ATCS for preventing disease and managing long-term conditions on behavioural change, clinical, process, cognitive, patient-centred and adverse outcomes. SEARCH METHODS We searched 10 electronic databases (the Cochrane Central Register of Controlled Trials; MEDLINE; Embase; PsycINFO; CINAHL; Global Health; WHOLIS; LILACS; Web of Science; and ASSIA); three grey literature sources (Dissertation Abstracts, Index to Theses, Australasian Digital Theses); and two trial registries (www.controlled-trials.com; www.clinicaltrials.gov) for papers published between 1980 and June 2015. SELECTION CRITERIA Randomised, cluster- and quasi-randomised trials, interrupted time series and controlled before-and-after studies comparing ATCS interventions, with any control or another ATCS type were eligible for inclusion. Studies in all settings, for all consumers/carers, in any preventive healthcare or long term condition management role were eligible. DATA COLLECTION AND ANALYSIS We used standard Cochrane methods to select and extract data and to appraise eligible studies. MAIN RESULTS We included 132 trials (N = 4,669,689). Studies spanned across several clinical areas, assessing many comparisons based on evaluation of different ATCS types and variable comparison groups. Forty-one studies evaluated ATCS for delivering preventive healthcare, 84 for managing long-term conditions, and seven studies for appointment reminders. We downgraded our certainty in the evidence primarily because of the risk of bias for many outcomes. We judged the risk of bias arising from allocation processes to be low for just over half the studies and unclear for the remainder. We considered most studies to be at unclear risk of performance or detection bias due to blinding, while only 16% of studies were at low risk. We generally judged the risk of bias due to missing data and selective outcome reporting to be unclear.For preventive healthcare, ATCS (ATCS Plus, IVR, unidirectional) probably increase immunisation uptake in children (risk ratio (RR) 1.25, 95% confidence interval (CI) 1.18 to 1.32; 5 studies, N = 10,454; moderate certainty) and to a lesser extent in adolescents (RR 1.06, 95% CI 1.02 to 1.11; 2 studies, N = 5725; moderate certainty). The effects of ATCS in adults are unclear (RR 2.18, 95% CI 0.53 to 9.02; 2 studies, N = 1743; very low certainty).For screening, multimodal ATCS increase uptake of screening for breast cancer (RR 2.17, 95% CI 1.55 to 3.04; 2 studies, N = 462; high certainty) and colorectal cancer (CRC) (RR 2.19, 95% CI 1.88 to 2.55; 3 studies, N = 1013; high certainty) versus usual care. It may also increase osteoporosis screening. ATCS Plus interventions probably slightly increase cervical cancer screening (moderate certainty), but effects on osteoporosis screening are uncertain. IVR systems probably increase CRC screening at 6 months (RR 1.36, 95% CI 1.25 to 1.48; 2 studies, N = 16,915; moderate certainty) but not at 9 to 12 months, with probably little or no effect of IVR (RR 1.05, 95% CI 0.99, 1.11; 2 studies, 2599 participants; moderate certainty) or unidirectional ATCS on breast cancer screening.Appointment reminders delivered through IVR or unidirectional ATCS may improve attendance rates compared with no calls (low certainty). For long-term management, medication or laboratory test adherence provided the most general evidence across conditions (25 studies, data not combined). Multimodal ATCS versus usual care showed conflicting effects (positive and uncertain) on medication adherence. ATCS Plus probably slightly (versus control; moderate certainty) or probably (versus usual care; moderate certainty) improves medication adherence but may have little effect on adherence to tests (versus control). IVR probably slightly improves medication adherence versus control (moderate certainty). Compared with usual care, IVR probably improves test adherence and slightly increases medication adherence up to six months but has little or no effect at longer time points (moderate certainty). Unidirectional ATCS, compared with control, may have little effect or slightly improve medication adherence (low certainty). The evidence suggested little or no consistent effect of any ATCS type on clinical outcomes (blood pressure control, blood lipids, asthma control, therapeutic coverage) related to adherence, but only a small number of studies contributed clinical outcome data.The above results focus on areas with the most general findings across conditions. In condition-specific areas, the effects of ATCS varied, including by the type of ATCS intervention in use.Multimodal ATCS probably decrease both cancer pain and chronic pain as well as depression (moderate certainty), but other ATCS types were less effective. Depending on the type of intervention, ATCS may have small effects on outcomes for physical activity, weight management, alcohol consumption, and diabetes mellitus. ATCS have little or no effect on outcomes related to heart failure, hypertension, mental health or smoking cessation, and there is insufficient evidence to determine their effects for preventing alcohol/substance misuse or managing illicit drug addiction, asthma, chronic obstructive pulmonary disease, HIV/AIDS, hypercholesterolaemia, obstructive sleep apnoea, spinal cord dysfunction or psychological stress in carers.Only four trials (3%) reported adverse events, and it was unclear whether these were related to the interventions. AUTHORS' CONCLUSIONS ATCS interventions can change patients' health behaviours, improve clinical outcomes and increase healthcare uptake with positive effects in several important areas including immunisation, screening, appointment attendance, and adherence to medications or tests. The decision to integrate ATCS interventions in routine healthcare delivery should reflect variations in the certainty of the evidence available and the size of effects across different conditions, together with the varied nature of ATCS interventions assessed. Future research should investigate both the content of ATCS interventions and the mode of delivery; users' experiences, particularly with regard to acceptability; and clarify which ATCS types are most effective and cost-effective.
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Affiliation(s)
- Pawel Posadzki
- Lee Kong Chian School of Medicine, Nanyang Technological UniversityCentre for Population Health Sciences (CePHaS)3 Fusionopolis Link, #06‐13Nexus@one‐northSingaporeSingapore138543
| | - Nikolaos Mastellos
- Imperial College LondonGlobal eHealth Unit, Department of Primary Care and Public Health, School of Public HealthSt Dunstans RoadLondonHammersmithUKW6 8RP
| | - Rebecca Ryan
- La Trobe UniversityCentre for Health Communication and Participation, School of Psychology and Public HealthBundooraVICAustralia3086
| | - Laura H Gunn
- Stetson UniversityPublic Health Program421 N Woodland BlvdDeLandFloridaUSA32723
| | - Lambert M Felix
- Edge Hill UniversityFaculty of Health and Social CareSt Helens RoadOrmskirkLancashireUKL39 4QP
| | - Yannis Pappas
- University of BedfordshireInstitute for Health ResearchPark SquareLutonBedfordUKLU1 3JU
| | - Marie‐Pierre Gagnon
- Traumatologie – Urgence – Soins IntensifsCentre de recherche du CHU de Québec, Axe Santé des populations ‐ Pratiques optimales en santé10 Rue de l'Espinay, D6‐727QuébecQCCanadaG1L 3L5
| | - Steven A Julious
- University of SheffieldMedical Statistics Group, School of Health and Related ResearchRegent Court, 30 Regent StreetSheffieldUKS1 4DA
| | - Liming Xiang
- Nanyang Technological UniversityDivision of Mathematical Sciences, School of Physical and Mathematical Sciences21 Nanyang LinkSingaporeSingapore
| | - Brian Oldenburg
- University of MelbourneMelbourne School of Population and Global HealthMelbourneVictoriaAustralia
| | - Josip Car
- Lee Kong Chian School of Medicine, Nanyang Technological UniversityCentre for Population Health Sciences (CePHaS)3 Fusionopolis Link, #06‐13Nexus@one‐northSingaporeSingapore138543
- Imperial College LondonGlobal eHealth Unit, Department of Primary Care and Public Health, School of Public HealthSt Dunstans RoadLondonHammersmithUKW6 8RP
- University of LjubljanaDepartment of Family Medicine, Faculty of MedicineLjubljanaSlovenia
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Schmidt S, Monk JM, Robinson LE, Mourtzakis M. The integrative role of leptin, oestrogen and the insulin family in obesity-associated breast cancer: potential effects of exercise. Obes Rev 2015; 16:473-87. [PMID: 25875578 PMCID: PMC4691342 DOI: 10.1111/obr.12281] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 02/06/2015] [Accepted: 02/24/2015] [Indexed: 12/13/2022]
Abstract
Obesity is an established risk factor for postmenopausal breast cancer. The mechanisms through which obesity influences the development and progression of breast cancer are not fully elucidated; however, several factors such as increased oestrogen, concentrations of various members of the insulin family and inflammation that are associated with adiposity are purported to be important factors in this relationship. Emerging research has also begun to focus on the role of adipokines, (i.e. adipocyte secreted factors), in breast cancer. Leptin secretion is directly related to adiposity and is believed to promote breast cancer directly and independently, as well as through involvement with the oestrogen and insulin signalling pathways. As leptin is secreted from white adipose tissue, any intervention that reduces adiposity may be favourable. However, it is also important to consider that energy expenditure through exercise, independent of fat loss, may improve leptin regulation. The purpose of this narrative review was to explore the role of leptin in breast cancer development and progression, identify key interactions with oestrogen and the insulin family, and distinguish the potential effects of exercise on these interactions.
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Affiliation(s)
- S Schmidt
- Department of Kinesiology, University of Waterloo, Waterloo, Canada
| | - J M Monk
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada
| | - L E Robinson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Canada
| | - M Mourtzakis
- Department of Kinesiology, University of Waterloo, Waterloo, Canada
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