1
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Wang Z, Yao W, Wu W, Huang J, Ma Y, Yang C, Shi J, Fu J, Wang Y, Wong MCS, Xu W. Global incidence trends of early-onset colorectal cancer and related exposures in early-life: an ecological analysis based on the GBD 2019. Front Public Health 2024; 12:1367818. [PMID: 38966706 PMCID: PMC11222603 DOI: 10.3389/fpubh.2024.1367818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Accepted: 06/11/2024] [Indexed: 07/06/2024] Open
Abstract
Background The incidence of early-onset colorectal cancer (EOCRC) is increasing globally. This study aims to describe the temporal trends of incidence and explore related risk exposures in early-life at the country level based on the GBD 2019. Methods Data on the incidence and attributable risk factors of EOCRC were obtained from the GBD 2019. Temporal trends of age-standardized incidence were evaluated by average annual percentage change (AAPC). Early-life exposures were indicated as summary exposure values (SEV) of selected factors, SDI and GDP per capita in previous decades and at ages 0-4, 5-9, 10-14 and 15-19 years. Weighted linear or non-linear regressions were applied to evaluate the ecological aggregate associations of the exposures with incidences of EOCRC. Results The global age-standardized incidence of EOCRC increased from 3.05 (3.03, 3.07) to 3.85 (3.83, 3.86) per 100,000 during 1990 and 2019. The incidence was higher in countries with high socioeconomic levels, and increased drastically in countries in East Asia and Caribbean, particularly Jamaica, Saudi Arabia and Vietnam. The GDP per capita, SDI, and SEVs of iron deficiency, alcohol use, high body-mass index, and child growth failure in earlier years were more closely related with the incidences of EOCRC in 2019. Exposures at ages 0-4, 5-9, 10-14 and 15-19 years were also associated with the incidences, particularly for the exposures at ages 15-19 years. Conclusion The global incidence of EOCRC increased during past three decades. The large variations at regional and national level may be related with the distribution of risk exposures in early life.
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Affiliation(s)
- Ziyang Wang
- Global Health Institute, Fudan University School of Public Health, Shanghai, China
| | - Weiyuan Yao
- Global Health Institute, Fudan University School of Public Health, Shanghai, China
| | - Weimiao Wu
- Global Health Institute, Fudan University School of Public Health, Shanghai, China
| | - Junjie Huang
- Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Sha Tin, Hong Kong SAR, China
| | - Yanlei Ma
- Department of Colorectal Surgery, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Chen Yang
- Centre for Disease Control & Prevention in Pudong New Area of Shanghai, Shanghai, China
| | - Jufang Shi
- Office of Cancer Screening, National Cancer Centre/National Clinical Research Centre for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Jiongxing Fu
- Global Health Institute, Fudan University School of Public Health, Shanghai, China
| | - Yingying Wang
- Centre for Disease Control & Prevention in Pudong New Area of Shanghai, Shanghai, China
| | - Martin C. S. Wong
- Jockey Club School of Public Health and Primary Care, Faculty of Medicine, The Chinese University of Hong Kong, Sha Tin, Hong Kong SAR, China
| | - Wanghong Xu
- Global Health Institute, Fudan University School of Public Health, Shanghai, China
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2
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Amirsasan R, Akbarzadeh M, Akbarzadeh S. Exercise and colorectal cancer: prevention and molecular mechanisms. Cancer Cell Int 2022; 22:247. [PMID: 35945569 PMCID: PMC9361674 DOI: 10.1186/s12935-022-02670-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 08/02/2022] [Indexed: 12/16/2022] Open
Abstract
Exercise and physical activity have been shown to be strongly associated with a decreased incidence rate of various chronic diseases especially numerous human malignancies. A huge number of clinical trials and meta-analysis have demonstrated that exercise is significantly effective in lowering the risk of colorectal cancer. In addition, it is suggested as an effective therapeutic modality against this cancer type. Therefore, in this review, we will review comprehensibly the effects of exercise in preventing, treating, and alleviating the adverse effects of conventional therapeutic options in colorectal cancer. Moreover, the possible mechanisms underlying the positive effects of exercise and physical activity in colorectal cancer, including regulation of inflammation, apoptosis, growth factor axis, immunity, epigenetic, etc. will be also discussed. Exercise is an effective post-treatment management program in colorectal cancer survivals Exercise improves muscle strength, cardiorespiratory fitness, emotional distress, physical activity, fatigue, and sleep quality in colorectal patients undergoing chemotherapy Targeting and modulating insulin-like growth factor (IGF) system, inflammation, apoptosis, immunity, epigenetic, Leptin and Ghrelin, and signaling pathways are major underlying mechanisms for preventive effects of exercise in colorectal cancer
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Affiliation(s)
- Ramin Amirsasan
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Tabriz, Tabriz, Iran
| | - Maryam Akbarzadeh
- Department of Biology, Faculty of Natural Sciences, University of Tabriz, Tabriz, Iran
| | - Shabnam Akbarzadeh
- Department of Exercise Physiology, Faculty of Physical Education and Sport Sciences, University of Tabriz, Tabriz, Iran.
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3
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Liu XF, Zhu XD, Feng LH, Li XL, Xu B, Li KS, Xiao N, Lei M, Sun HC, Tang ZY. Physical activity improves outcomes of combined lenvatinib plus anti-PD-1 therapy in unresectable hepatocellular carcinoma: a retrospective study and mouse model. Exp Hematol Oncol 2022; 11:20. [PMID: 35379324 PMCID: PMC8978397 DOI: 10.1186/s40164-022-00275-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/29/2022] [Indexed: 11/10/2022] Open
Abstract
Background Physical activity is known to have anti-cancer effects, including immunomodulatory actions. This study investigated the hypothesis that physical activity synergizes with combined lenvatinib plus anti-PD-1 therapy to enhance efficacy in patients with unresectable HCC. Methods The physical activity levels of patients with unresectable HCC receiving combined lenvatinib plus anti-PD-1 therapy were recorded by questionnaire. Patients were categorized according to physical activity levels (active vs. sedentary). The primary outcome was overall survival (OS). Secondary outcomes included objective response rate (ORR) and progression-free survival (PFS). A subcutaneous syngeneic HCC model was generated in C57BL/6 mice. Mice were randomized to receive placebo, combined lenvatinib plus anti-PD-1 antibodies or combination therapy plus physical activity. Tumors were measured every 3 days and harvested for immunohistochemistry analysis at 20 mm maximum diameter. Results Fifty-nine patients with unresectable HCC were categorized to active (n = 28) or sedentary (n = 31) groups. The active group had higher albumin and des-γ-carboxy prothrombin levels and lower hepatitis B virus load at baseline; other clinical and oncologic characteristics were comparable between the two groups. Patients in the active group had significantly longer OS (HR = 0.220, 95% CI 0.060–0.799) and PFS (HR = 0.158, 95% CI 0.044–0.562) and higher ORR (OR = 4.571, 95% CI 1.482–14.102) than patients in the sedentary group. Regular physical activity was independently associated with OS, PFS and ORR. The mouse model showed that physical activity significantly suppressed tumor growth and prolonged survival of tumor-bearing mice. Furthermore, physical activity inhibited Treg cell infiltration and immune checkpoint expression (including CTLA4, TIGIT and TIM3) induced by long-term combined lenvatinib plus anti-PD-1 therapy, improving efficacy. Conclusions Regular physical activity was associated with improved outcomes in unresectable HCC receiving combined lenvatinib plus anti-PD-1 therapy. Physical activity may improve therapeutic efficacy by reprograming the tumor microenvironment from an immunosuppressive to immunostimulatory phenotype. Supplementary Information The online version contains supplementary material available at 10.1186/s40164-022-00275-0.
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Affiliation(s)
- Xue-Feng Liu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, No. 180, Fenglin Road, Shanghai, 200032, China.,Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Shanghai, 200032, China
| | - Xiao-Dong Zhu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, No. 180, Fenglin Road, Shanghai, 200032, China.,Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Shanghai, 200032, China
| | - Long-Hai Feng
- Department of Hepatic Surgery, Fudan University Shanghai Cancer Center, Shanghai Medical College, Fudan University, Shanghai, 200032, China
| | - Xiao-Long Li
- Department of Thoracic Surgery, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai, 200080, China
| | - Bin Xu
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, No. 180, Fenglin Road, Shanghai, 200032, China.,Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Shanghai, 200032, China
| | - Kang-Shuai Li
- Department of Hepatobiliary Surgery, Qilu Hospital of Shandong University, Jinan, 250012, China
| | - Nan Xiao
- Department of Breast Surgery, Xin Hua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, China
| | - Ming Lei
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, No. 180, Fenglin Road, Shanghai, 200032, China.,Key Laboratory of Carcinogenesis and Cancer Invasion of Ministry of Education, Shanghai, 200032, China
| | - Hui-Chuan Sun
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, No. 180, Fenglin Road, Shanghai, 200032, China.
| | - Zhao-You Tang
- Department of Liver Surgery and Transplantation, Liver Cancer Institute and Zhongshan Hospital, Fudan University, No. 180, Fenglin Road, Shanghai, 200032, China.
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4
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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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5
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Tumor Metabolic Reprogramming by Adipokines as a Critical Driver of Obesity-Associated Cancer Progression. Int J Mol Sci 2021; 22:ijms22031444. [PMID: 33535537 PMCID: PMC7867092 DOI: 10.3390/ijms22031444] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/28/2021] [Accepted: 01/28/2021] [Indexed: 12/11/2022] Open
Abstract
Adiposity is associated with an increased risk of various types of carcinoma. One of the plausible mechanisms underlying the tumor-promoting role of obesity is an aberrant secretion of adipokines, a group of hormones secreted from adipose tissue, which have exhibited both oncogenic and tumor-suppressing properties in an adipokine type- and context-dependent manner. Increasing evidence has indicated that these adipose tissue-derived hormones differentially modulate cancer cell-specific metabolism. Some adipokines, such as leptin, resistin, and visfatin, which are overproduced in obesity and widely implicated in different stages of cancer, promote cellular glucose and lipid metabolism. Conversely, adiponectin, an adipokine possessing potent anti-tumor activities, is linked to a more favorable metabolic phenotype. Adipokines may also play a pivotal role under the reciprocal regulation of metabolic rewiring of cancer cells in tumor microenvironment. Given the fact that metabolic reprogramming is one of the major hallmarks of cancer, understanding the modulatory effects of adipokines on alterations in cancer cell metabolism would provide insight into the crosstalk between obesity, adipokines, and tumorigenesis. In this review, we summarize recent insights into putative roles of adipokines as mediators of cellular metabolic rewiring in obesity-associated tumors, which plays a crucial role in determining the fate of tumor cells.
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6
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Lee K, Zhou J, Norris MK, Chow C, Dieli-Conwright CM. Prehabilitative Exercise for the Enhancement of Physical, Psychosocial, and Biological Outcomes Among Patients Diagnosed with Cancer. Curr Oncol Rep 2020; 22:71. [PMID: 32537699 DOI: 10.1007/s11912-020-00932-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE OF REVIEW This review summarizes the effects of prehabilitative exercise interventions on the physical, psychosocial, and biological outcomes among patients with cancer. Current gaps and future directions in prehabilitative exercise research will be addressed. RECENT FINDINGS Prehabilitative exercise mitigates the detrimental impact of cancer surgery on physical fitness, noted by increases in maximal oxygen consumption and 6-min walk distance. Beneficial effects on psychosocial and biological outcomes remain inconclusive. Aerobic exercise interventions were often prescribed and included low-, moderate-, or high-intensity exercise. Resistance exercise interventions were often performed in conjunction with aerobic exercise. Prehabilitative exercise elicits robust improvements in physical fitness; however, effect on psychosocial and biological outcomes remains inconclusive. Exercise prescription parameters varied greatly by frequency, intensity, time, and type across multiple cancer diagnoses. Future investigations are needed to systematically dose exercise for a wider variety of outcome measures, with an overall goal to set forth pre-operative exercise guidelines.
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Affiliation(s)
- Kyuwan Lee
- Department of Population Sciences, City of Hope, Duarte, CA, 91010, USA
| | - Judy Zhou
- Division of Biokinesiology and Physical Therapy, Ostrow School of Dentistry, University of Southern California (USC), Los Angeles, CA, 90089, USA
| | - Mary K Norris
- Division of Populations Sciences, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, 375 Longwood Ave, Boston, MA, 02215, USA
| | - Christina Chow
- Division of Biokinesiology and Physical Therapy, Ostrow School of Dentistry, University of Southern California (USC), Los Angeles, CA, 90089, USA
| | - Christina M Dieli-Conwright
- Division of Populations Sciences, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, 375 Longwood Ave, Boston, MA, 02215, USA.
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7
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Pollán M, Casla-Barrio S, Alfaro J, Esteban C, Segui-Palmer MA, Lucia A, Martín M. Exercise and cancer: a position statement from the Spanish Society of Medical Oncology. Clin Transl Oncol 2020; 22:1710-1729. [PMID: 32052383 PMCID: PMC7423809 DOI: 10.1007/s12094-020-02312-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Accepted: 01/27/2020] [Indexed: 12/16/2022]
Abstract
Due to improvements in the number of cancer survivors and survival time, there is a growing interest in healthy behaviors, such as physical activity (PA), and their potential impact on cancer- and non-cancer-related morbidity in individuals with cancer. Commissioned by the Spanish Society of Medical Oncology (SEOM), in this review, we sought to distill the most recent evidence on this topic, focusing on the mechanisms that underpin the effects of PA on cancer, the role of PA in cancer prevention and in the prognosis of cancer and practical recommendations for clinicians regarding PA counseling. Despite the available information, the introduction of exercise programs into the global management of cancer patients remains a challenge with several areas of uncertainty. Among others, the most effective behavioral interventions to achieve long-term changes in a patient’s lifestyle and the optimal intensity and duration of PA should be defined with more precision in future studies.
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Affiliation(s)
- M Pollán
- Cancer and Environmental Epidemiology, Carlos III Institute of Health, Madrid, Spain.,Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP), Madrid, Spain
| | - S Casla-Barrio
- Exercise-Oncology Unit, Spanish Cancer Association, Madrid, Spain.,GEICAM (Spanish Breast Cancer Group), Madrid, Spain
| | - J Alfaro
- Medical Oncology, Hospital de Terrassa, Barcelona, Spain
| | - C Esteban
- Medical Oncology, Hospital Virgen de la Salud, Toledo, Spain
| | - M A Segui-Palmer
- Medical Oncology, Parc Taulí Hospital Universitari, Sabadell, Spain
| | - A Lucia
- Faculty of Sport Sciences, Universidad Europea de Madrid, Calle Tajo, s/n, 28670, Villaviciosa de Odón, Madrid, Spain. .,Instituto de Investigación Hospital 12 de Octubre and CIBER de Envejecimiento Saludable y Fragilidad (CIBERFES), Madrid, Spain.
| | - M Martín
- GEICAM (Spanish Breast Cancer Group), Madrid, Spain. .,Instituto de Investigacion Sanitaria Gregorio Marañón, Universidad Complutense, Madrid, Spain. .,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain. .,Medical Oncology Service, Hospital General Universitario Gregorio Marañón, Calle Dr. Esquerdo 46, 28007, Madrid, Spain.
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8
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Dufresne S, Guéritat J, Chiavassa S, Noblet C, Assi M, Rioux‐Leclercq N, Rannou‐Bekono F, Lefeuvre‐Orfila L, Paris F, Rébillard A. Exercise training improves radiotherapy efficiency in a murine model of prostate cancer. FASEB J 2020; 34:4984-4996. [DOI: 10.1096/fj.201901728r] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 12/23/2019] [Accepted: 01/22/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Suzanne Dufresne
- Movement, Sport, and Health Sciences Laboratory EA 1274 Université Rennes 2 ENS Rennes Bruz France
| | - Jordan Guéritat
- Movement, Sport, and Health Sciences Laboratory EA 1274 Université Rennes 2 ENS Rennes Bruz France
| | - Sophie Chiavassa
- CRCINA INSERM Université de Nantes Université d'Angers Nantes France
- Institut de Cancérologie de l'Ouest Centre René Gauducheau Saint Herblain France
| | - Caroline Noblet
- CRCINA INSERM Université de Nantes Université d'Angers Nantes France
- Institut de Cancérologie de l'Ouest Centre René Gauducheau Saint Herblain France
| | - Mohamad Assi
- Movement, Sport, and Health Sciences Laboratory EA 1274 Université Rennes 2 ENS Rennes Bruz France
| | | | - Françoise Rannou‐Bekono
- Movement, Sport, and Health Sciences Laboratory EA 1274 Université Rennes 2 ENS Rennes Bruz France
| | - Luz Lefeuvre‐Orfila
- Movement, Sport, and Health Sciences Laboratory EA 1274 Université Rennes 2 ENS Rennes Bruz France
| | - François Paris
- CRCINA INSERM Université de Nantes Université d'Angers Nantes France
- Institut de Cancérologie de l'Ouest Centre René Gauducheau Saint Herblain France
| | - Amélie Rébillard
- Movement, Sport, and Health Sciences Laboratory EA 1274 Université Rennes 2 ENS Rennes Bruz France
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9
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LEE B, CHUNG W. Effects of Aerobic Exercise on Cytokine Expression in a Breast Cancer Mouse Model. IRANIAN JOURNAL OF PUBLIC HEALTH 2020; 49:14-20. [PMID: 32309219 PMCID: PMC7152642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
BACKGROUND Regular physical activity lowers or prevents the risk of heart disease, diabetes, some cancers, the development of hypertension, and death from these diseases through a reduction in inflammation. Cytokines, such as interleukin (IL)-6, IL-18, tumor necrosis factor-alpha (TNF-α), and C-reactive protein (CRP) are major markers representing the inflammatory process. This study aimed to investigate cytokine mRNA expression levels of IL-6, IL-18, TNF-α, and CRP in hepatocytes from breast cancer xenograft mice with or without moderate exercise. METHODS Each of the 5 mice at SP Korea Company, Seoul, Korea in 2015 were randomly divided into 3 groups: control (CTL), breast cancer (BC), and breast cancer exercise (BCEX). The inflammatory markers were analyzed in 10-week-old female Balb/C nude mice hepatocytes (n = 15; CTL = 5, BC = 5, BCEX = 5). Moderate intensity physical activity in mice was performed on a treadmill at an intensity of 18 m/min for 12 weeks, at 30 min for 5 days per week. RESULTS IL-6, IL-18, TNF-α, and CRP mRNA expression levels of the BCEX group were significantly decreased compared to those of the BC group (P < 0.05), with no difference to the CTL group. CONCLUSION There might be a reduced inflammatory process via a reduction in TNF-α, IL-6, IL-18, and CRP expression in breast cancer mice that were subjected to moderate intensity exercise.
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10
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Ligibel JA, Dillon D, Giobbie-Hurder A, McTiernan A, Frank E, Cornwell M, Pun M, Campbell N, Dowling RJ, Chang MC, Tolaney S, Chagpar AB, Yung RL, Freedman RA, Dominici LS, Golshan M, Rhei E, Taneja K, Huang Y, Brown M, Winer EP, Jeselsohn R, Irwin ML. Impact of a Pre-Operative Exercise Intervention on Breast Cancer Proliferation and Gene Expression: Results from the Pre-Operative Health and Body (PreHAB) Study. Clin Cancer Res 2019; 25:5398-5406. [DOI: 10.1158/1078-0432.ccr-18-3143] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 03/08/2019] [Accepted: 04/18/2019] [Indexed: 11/16/2022]
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11
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Lutsiv T, McGinley JN, Neil ES, Thompson HJ. Cell Signaling Pathways in Mammary Carcinoma Induced in Rats with Low versus High Inherent Aerobic Capacity. Int J Mol Sci 2019; 20:ijms20061506. [PMID: 30917509 PMCID: PMC6470785 DOI: 10.3390/ijms20061506] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 03/20/2019] [Accepted: 03/22/2019] [Indexed: 12/17/2022] Open
Abstract
An inverse association exists between physical activity and breast cancer incidence and outcomes. An objective indicator of an individual’s recent physical activity exposure is aerobic capacity. We took advantage of the fact that there is an inherited as well as inducible component of aerobic capacity to show that experimentally induced mammary cancer is inversely related to inherent aerobic capacity (IAC). The objective of this study was to determine whether cell signaling pathways involved in the development of mammary cancer differed in rats with low inherent aerobic capacity (LIAC, n = 55) versus high inherent aerobic capacity (HIAC, n = 57). Cancer burden was 0.21 ± 0.16 g/rat in HIAC versus 1.14 ± 0.45 in LIAC, p < 0.001. Based on protein expression, cancer in LIAC animals was associated with upregulated glucose utilization, and protein and fatty acid synthesis. Signaling in cancers from HIAC rats was associated with energy sensing, fatty acid oxidation and cell cycle arrest. These findings support the thesis that pro-glycolytic, metabolic inflexibility in LIAC favors not only insulin resistance and obesity but also tumor development and growth. This provides an unappreciated framework for understanding how obesity and low aerobic fitness, hallmarks of physical inactivity, are associated with higher cancer risk and poorer prognosis.
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Affiliation(s)
- Tymofiy Lutsiv
- Cancer Prevention Laboratory, Colorado State University, Fort Collins, CO 80523, USA.
| | - John N McGinley
- Cancer Prevention Laboratory, Colorado State University, Fort Collins, CO 80523, USA.
| | - Elizabeth S Neil
- Cancer Prevention Laboratory, Colorado State University, Fort Collins, CO 80523, USA.
| | - Henry J Thompson
- Cancer Prevention Laboratory, Colorado State University, Fort Collins, CO 80523, USA.
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12
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Theriau CF, Connor MK. Voluntary physical activity counteracts the proliferative tumor growth microenvironment created by adipose tissue via high-fat diet feeding in female rats. Physiol Rep 2017; 5:5/13/e13325. [PMID: 28676553 PMCID: PMC5506521 DOI: 10.14814/phy2.13325] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 04/24/2017] [Accepted: 05/19/2017] [Indexed: 02/07/2023] Open
Abstract
The adipokine secretion profile created from adipose tissue may represent the molecular mechanism behind the obesity‐breast cancer association. Two adipokines, adiponectin (ADIPO), and leptin (LEP), are altered with obesity and exert antagonistic effects on breast cancer proliferation. We set out to determine whether the adipose‐dependent tumor promoting growth environment created by a high‐fat diet (HFD) in female Sprague‐Dawley rats is altered compared to established responses in male rats and whether voluntary physical activity (PA) ameliorates any HFD‐dependent effects. We found that conditioned media (CM) created from the adipose tissue of female HFD‐fed rats increased the proliferation of MCF7 cells compared to those cells grown in CM prepared from lean adipose tissue. HFD‐CM inhibited AMPK and activated Akt signaling, decreased p27 phosphorylation at T198, reduced total p27 and AdiporR1 protein levels and promoted cell‐cycle entry. PA reversed the proliferative effects of HFD‐CM on MCF7 cells by preventing the effects of HFD on AMPK, Akt, p27 and AdipoR1, ultimately resulting in cell‐cycle withdrawal. Overexpressing AdipoR1 abolished the proliferative effects of the HFD‐CM on MCF7 cells and enhanced the anti‐proliferative effects PA on the HFD‐CM. Thus, PA represents a means to prevent deleterious obesity‐related alterations in tumor growth environment which are brought about by changes in adipokine secretion profile from adipose tissue in the presence of estrogen. Furthermore, although adipose produces hundreds of adipokines, the ADIPO:LEP ratio may serve to indicate the contribution of adipose in creating a tumor growth microenvironment.
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Affiliation(s)
- Christopher F Theriau
- School of Kinesiology and Health Science, York University, Toronto, ON, Canada.,Muscle Health Research Centre, York University, Toronto, ON, Canada
| | - Michael K Connor
- School of Kinesiology and Health Science, York University, Toronto, ON, Canada .,Muscle Health Research Centre, York University, Toronto, ON, Canada
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13
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Exercise and the Hallmarks of Cancer. Trends Cancer 2017; 3:423-441. [DOI: 10.1016/j.trecan.2017.04.007] [Citation(s) in RCA: 99] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2016] [Revised: 04/16/2017] [Accepted: 04/18/2017] [Indexed: 12/15/2022]
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14
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Fann DYW, Ng GYQ, Poh L, Arumugam TV. Positive effects of intermittent fasting in ischemic stroke. Exp Gerontol 2017; 89:93-102. [PMID: 28115234 DOI: 10.1016/j.exger.2017.01.014] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 12/26/2016] [Accepted: 01/18/2017] [Indexed: 12/18/2022]
Abstract
Intermittent fasting (IF) is a dietary protocol where energy restriction is induced by alternate periods of ad libitum feeding and fasting. Prophylactic intermittent fasting has been shown to extend lifespan and attenuate the progress and severity of age-related diseases such as cardiovascular (e.g. stroke and myocardial infarction), neurodegenerative (e.g. Alzheimer's disease and Parkinson's disease) and cancerous diseases in animal models. Stroke is the second leading cause of death, and lifestyle risk factors such as obesity and physical inactivity have been associated with elevated risks of stroke in humans. Recent studies have shown that prophylactic IF may mitigate tissue damage and neurological deficit following ischemic stroke by a mechanism(s) involving suppression of excitotoxicity, oxidative stress, inflammation and cell death pathways in animal stroke models. This review summarizes data supporting the potential hormesis mechanisms of prophylactic IF in animal models, and with a focus on findings from animal studies of prophylactic IF in stroke in our laboratory.
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Affiliation(s)
- David Yang-Wei Fann
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Gavin Yong Quan Ng
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Luting Poh
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Thiruma V Arumugam
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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15
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Sturgeon KM, Schweitzer A, Leonard JJ, Tobias DK, Liu Y, Cespedes Feliciano E, Malik VS, Joshi A, Rosner B, De Jonghe BC. Physical activity induced protection against breast cancer risk associated with delayed parity. Physiol Behav 2016; 169:52-58. [PMID: 27884590 DOI: 10.1016/j.physbeh.2016.11.026] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/12/2016] [Accepted: 11/18/2016] [Indexed: 10/20/2022]
Abstract
Epidemiological evidence indicates that physical activity between menarche and first pregnancy is associated with a lower risk of breast cancer among women with at least 20years between these reproductive events. The mechanism by which physical activity during this interval confers protection is unknown. This study used a novel animal model to assess potentially protective effects of physical activity on tumor development in delayed parity. Thirty-six female Sprague Dawley rats received an i.p. injection of 50mg/kg N-methyl-N-nitrosourea (MNU) at 5weeks of age. Estrogen and progesterone pellets were implanted subcutaneously 1week (early parity, EP, n=8) or 4weeks (delayed parity, DP, n=11) following MNU injection. An additional group of DP rats were progressively exercise trained (Ex+DP, n=9) on a treadmill following MNU injection for 7weeks (up to 20m/min at 15% incline for 30min). We observed the greatest tumor latency and smallest tumor burden in Ex+DP animals. Ductal hyperplasia and inflammation of non-tumor bearing mammary glands were only found in DP, and we detected a significant increase in collagen for DP and Ex+DP compared to EP. Exercise induced differential gene expression of cyclin-dependent kinase-inhibitor 1C (Cdkn1c) and urokinase-plasminogen activator (Plau) in mammary tissue of Ex+DP animals compared to DP alone. While there are delayed parity-induced changes in mammary gland collagen and gene expression levels, Ex+DP animals had longer tumor latency, smaller tumor burden, and glandular tissue resistant to ductal hyperplasia. Exercise may induce protection through beneficial regulation of gene expression profiles.
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Affiliation(s)
| | - Aaron Schweitzer
- University of Pennsylvania, School of Arts and Sciences, Philadelphia, PA, USA
| | - John J Leonard
- University of Pennsylvania, School of Arts and Sciences, Philadelphia, PA, USA
| | - Deirdre K Tobias
- Harvard T.H. Chan School of Public Health, Boston, MA, USA; Division of Preventive Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Ying Liu
- Washington University, School of Medicine, St. Louis, MO, USA
| | | | | | - Amit Joshi
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Bernard Rosner
- Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Bart C De Jonghe
- University of Pennsylvania, School of Nursing, Philadelphia, PA, USA
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16
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Romanus S, Neven P, Soubry A. Extending the Developmental Origins of Health and Disease theory: does paternal diet contribute to breast cancer risk in daughters? Breast Cancer Res 2016; 18:103. [PMID: 27729090 PMCID: PMC5059907 DOI: 10.1186/s13058-016-0760-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The Developmental Origins of Health and Disease (DOHaD) theory focuses on the consequences of periconceptional and in utero exposures. A wide range of environmental conditions during early development are now being investigated as a driving force for epigenetic disruptions that enhance disease risk in later life, including cardiovascular, metabolic, endocrine, and mental disorders and even breast cancer. Most studies involve mother–child dyads, with less focus on environmental influences through the father. Over the last few years, however, new insights have been introduced on paternal effects and the plasticity of the epigenome of developing sperm cells have been proposed to underlie inheritable changes from ancestral exposures. The field is evolving rapidly and study results from animal models are promising. Although caution should be taken in translating animal data to humans, epidemiological findings also suggest a prominent role of the father. Therefore, we here propose an extension to the DOHaD theory to include also paternally inheritable influences.
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Affiliation(s)
- Stephanie Romanus
- Epidemiology Research Group, Department of Public Health and Primary Care, Faculty of Medicine, KU Leuven - University of Leuven, 3000, Leuven, Belgium
| | - Patrick Neven
- Division of Gynaecological Oncology, Leuven Cancer Institute, KU Leuven - University of Leuven, Leuven, Belgium
| | - Adelheid Soubry
- Epidemiology Research Group, Department of Public Health and Primary Care, Faculty of Medicine, KU Leuven - University of Leuven, 3000, Leuven, Belgium.
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17
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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: 124] [Impact Index Per Article: 15.5] [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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18
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Theriau CF, Shpilberg Y, Riddell MC, Connor MK. Voluntary physical activity abolishes the proliferative tumor growth microenvironment created by adipose tissue in animals fed a high fat diet. J Appl Physiol (1985) 2016; 121:139-53. [PMID: 27150834 DOI: 10.1152/japplphysiol.00862.2015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Accepted: 05/01/2016] [Indexed: 01/21/2023] Open
Abstract
The molecular mechanisms behind the obesity-breast cancer association may be regulated via adipokine secretion by white adipose tissue. Specifically, adiponectin and leptin are altered with adiposity and exert antagonistic effects on cancer cell proliferation. We set out to determine whether altering adiposity in vivo via high fat diet (HFD) feeding changed the tumor growth supporting nature of adipose tissue and whether voluntary physical activity (PA) could ameliorate these HFD-dependent effects. We show that conditioned media (CM) created from the adipose tissue of HFD fed animals caused an increase in the proliferation of MCF7 cells compared with cells exposed to CM prepared from the adipose of lean chow diet fed counterparts. This increased proliferation was driven within the MCF7 cells by an HFD-dependent antagonism between AMP-activated protein kinase (AMPK) and protein kinase B (Akt) signaling pathways, decreasing p27 protein levels via reduced phosphorylation at T198 and downregulation of adiponectin receptor 1 (AdipoR1). PA can ameliorate these proliferative effects of HFD-CM on MCF7 cells, increasing p27(T198) by AMPK, reducing pAkt(T308), and increasing AdipoR1, resulting in cell cycle withdrawal in a manner that depends on the PA intensity. High physical activity (>3 km/day) completely abolished the effects of HFD feeding. In addition, AdipoR1 overexpression mimics the effects of exercise, abolishing the proliferative effects of the HFD-CM on MCF7 cells and further enhancing the antiproliferative effects of PA on the HFD-CM. Thus voluntary PA represents a means to counteract the proliferative effects of adipose tissue on breast cancers in obese patients.
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Affiliation(s)
- Christopher F Theriau
- School of Kinesiology and Health Science and Muscle Health Research Centre, York University, Toronto, Ontario, Canada
| | | | - Michael C Riddell
- School of Kinesiology and Health Science and Muscle Health Research Centre, York University, Toronto, Ontario, Canada
| | - Michael K Connor
- School of Kinesiology and Health Science and Muscle Health Research Centre, York University, Toronto, Ontario, Canada
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19
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Murphy EA, Enos RT, Velázquez KT. Influence of Exercise on Inflammation in Cancer: Direct Effect or Innocent Bystander? Exerc Sport Sci Rev 2015; 43:134-42. [PMID: 25906430 DOI: 10.1249/jes.0000000000000054] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We propose the hypothesis that the benefits of exercise on inflammation in cancer are a result of a direct effect on inflammatory cytokines, including interleukin-6, tumor necrosis factor-α, and monocyte chemoattractant protein 1, that are critical for cancer growth as well as a bystander effect of the established relationship between exercise and cancer.
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Affiliation(s)
- E Angela Murphy
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, SC
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20
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Dysregulated metabolism contributes to oncogenesis. Semin Cancer Biol 2015; 35 Suppl:S129-S150. [PMID: 26454069 DOI: 10.1016/j.semcancer.2015.10.002] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Revised: 09/30/2015] [Accepted: 10/05/2015] [Indexed: 12/13/2022]
Abstract
Cancer is a disease characterized by unrestrained cellular proliferation. In order to sustain growth, cancer cells undergo a complex metabolic rearrangement characterized by changes in metabolic pathways involved in energy production and biosynthetic processes. The relevance of the metabolic transformation of cancer cells has been recently included in the updated version of the review "Hallmarks of Cancer", where dysregulation of cellular metabolism was included as an emerging hallmark. While several lines of evidence suggest that metabolic rewiring is orchestrated by the concerted action of oncogenes and tumor suppressor genes, in some circumstances altered metabolism can play a primary role in oncogenesis. Recently, mutations of cytosolic and mitochondrial enzymes involved in key metabolic pathways have been associated with hereditary and sporadic forms of cancer. Together, these results demonstrate that aberrant metabolism, once seen just as an epiphenomenon of oncogenic reprogramming, plays a key role in oncogenesis with the power to control both genetic and epigenetic events in cells. In this review, we discuss the relationship between metabolism and cancer, as part of a larger effort to identify a broad-spectrum of therapeutic approaches. We focus on major alterations in nutrient metabolism and the emerging link between metabolism and epigenetics. Finally, we discuss potential strategies to manipulate metabolism in cancer and tradeoffs that should be considered. More research on the suite of metabolic alterations in cancer holds the potential to discover novel approaches to treat it.
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21
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Ariaans G, de Jong S, Gietema J, Lefrandt J, de Vries E, Jalving M. Cancer-drug induced insulin resistance: Innocent bystander or unusual suspect. Cancer Treat Rev 2015; 41:376-84. [DOI: 10.1016/j.ctrv.2015.02.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Revised: 02/09/2015] [Accepted: 02/11/2015] [Indexed: 02/08/2023]
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22
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Seo DY, Lee SR, Kim N, Ko KS, Rhee BD, Han J. Humanized animal exercise model for clinical implication. Pflugers Arch 2014; 466:1673-87. [PMID: 24647666 DOI: 10.1007/s00424-014-1496-0] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/03/2014] [Accepted: 03/05/2014] [Indexed: 01/20/2023]
Abstract
Exercise and physical activity function as a patho-physiological process that can prevent, manage, and regulate numerous chronic conditions, including metabolic syndrome and age-related sarcopenia. Because of research ethics and technical difficulties in humans, exercise models using animals are requisite for the future development of exercise mimetics to treat such abnormalities. Moreover, the beneficial or adverse outcomes of a new regime or exercise intervention in the treatment of a specific condition should be tested prior to implementation in a clinical setting. In rodents, treadmill running (or swimming) and ladder climbing are widely used as aerobic and anaerobic exercise models, respectively. However, exercise models are not limited to these types. Indeed, there are no golden standard exercise modes or protocols for managing or improving health status since the types (aerobic vs. anaerobic), time (morning vs. evening), and duration (continuous vs. acute bouts) of exercise are the critical determinants for achieving expected beneficial effects. To provide insight into the understanding of exercise and exercise physiology, we have summarized current animal exercise models largely based on aerobic and anaerobic criteria. Additionally, specialized exercise models that have been developed for testing the effect of exercise on specific physiological conditions are presented. Finally, we provide suggestions and/or considerations for developing a new regime for an exercise model.
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Affiliation(s)
- Dae Yun Seo
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Department of Health Sciences and Technology, Cardiovascular and Metabolic Disease Center, Inje University, Bok Ji-Ro 75, Busanjin-Gu, Busan, 613-735, Republic of Korea
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23
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Newman G, Gonzalez-Perez RR. Leptin-cytokine crosstalk in breast cancer. Mol Cell Endocrinol 2014; 382:570-582. [PMID: 23562747 PMCID: PMC3844060 DOI: 10.1016/j.mce.2013.03.025] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2013] [Accepted: 03/26/2013] [Indexed: 02/07/2023]
Abstract
Despite accumulating evidence suggesting a positive correlation between leptin levels, obesity, post-menopause and breast cancer incidence, our current knowledge on the mechanisms involved in these relationships is still incomplete. Since the cloning of leptin in 1994 and its receptor (OB-R) 1 year later by Friedman's laboratory (Zhang et al., 1994) and Tartaglia et al. (Tartaglia et al., 1995), respectively, more than 22,000 papers related to leptin functions in several biological systems have been published (Pubmed, 2012). The ob gene product, leptin, is an important circulating signal for the regulation of body weight. Additionally, leptin plays critical roles in the regulation of glucose homeostasis, reproduction, growth and the immune response. Supporting evidence for leptin roles in cancer has been shown in more than 1000 published papers, with almost 300 papers related to breast cancer (Pubmed, 2012). Specific leptin-induced signaling pathways are involved in the increased levels of inflammatory, mitogenic and pro-angiogenic factors in breast cancer. In obesity, a mild inflammatory condition, deregulated secretion of proinflammatory cytokines and adipokines such as IL-1, IL-6, TNF-α and leptin from adipose tissue, inflammatory and cancer cells could contribute to the onset and progression of cancer. We used an in silico software program, Pathway Studio 9, and found 4587 references citing these various interactions. Functional crosstalk between leptin, IL-1 and Notch signaling (NILCO) found in breast cancer cells could represent the integration of developmental, proinflammatory and pro-angiogenic signals critical for leptin-induced breast cancer cell proliferation/migration, tumor angiogenesis and breast cancer stem cells (BCSCs). Remarkably, the inhibition of leptin signaling via leptin peptide receptor antagonists (LPrAs) significantly reduced the establishment and growth of syngeneic, xenograft and carcinogen-induced breast cancer and, simultaneously decreased the levels of VEGF/VEGFR2, IL-1 and Notch. Inhibition of leptin-cytokine crosstalk might serve as a preventative or adjuvant measure to target breast cancer, particularly in obese women. This review is intended to present an update analysis of leptin actions in breast cancer, highlighting its crosstalk to inflammatory cytokines and growth factors essential for tumor development, angiogenesis and potential role in BCSC.
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Affiliation(s)
- Gale Newman
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA 30310, United States.
| | - Ruben Rene Gonzalez-Perez
- Department of Microbiology, Biochemistry and Immunology, Morehouse School of Medicine, Atlanta, GA 30310, United States.
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24
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Integral role of PTP1B in adiponectin-mediated inhibition of oncogenic actions of leptin in breast carcinogenesis. Neoplasia 2013; 15:23-38. [PMID: 23358729 DOI: 10.1593/neo.121502] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2012] [Revised: 11/21/2012] [Accepted: 12/03/2012] [Indexed: 01/07/2023] Open
Abstract
The molecular effects of obesity are mediated by alterations in the levels of adipocytokines. High leptin level associated with obese state is a major cause of breast cancer progression and metastasis, whereas adiponectin is considered a "guardian angel adipocytokine" for its protective role against various obesity-related pathogenesis including breast cancer. In the present study, investigating the role of adiponectin as a potential inhibitor of leptin, we show that adiponectin treatment inhibits leptin-induced clonogenicity and anchorage-independent growth. Leptin-stimulated migration and invasion of breast cancer cells is also effectively inhibited by adiponectin. Analyses of the underlying molecular mechanisms reveal that adiponectin suppresses activation of two canonical signaling molecules of leptin signaling axis: extracellular signal-regulated kinase (ERK) and Akt. Pretreatment of breast cancer cells with adiponectin protects against leptin-induced activation of ERK and Akt. Adiponectin increases expression and activity of the physiological inhibitor of leptin signaling, protein tyrosine phosphatase 1B (PTP1B), which is found to be integral to leptin-antagonist function of adiponectin. Inhibition of PTP1B blocks adiponectin-mediated inhibition of leptin-induced breast cancer growth. Our in vivo studies show that adenovirus-mediated adiponectin treatment substantially reduces leptin-induced mammary tumorigenesis in nude mice. Exploring therapeutic strategies, we demonstrate that treatment of breast cancer cells with rosiglitazone results in increased adiponectin expression and inhibition of migration and invasion. Rosiglitazone treatment also inhibits leptin-induced growth of breast cancer cells. Taken together, these data show that adiponectin treatment can inhibit the oncogenic actions of leptin through blocking its downstream signaling molecules and raising adiponectin levels could be a rational therapeutic strategy for breast carcinoma in obese patients with high leptin levels.
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25
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King B, Jiang Y, Su X, Xu J, Xie L, Standard J, Wang W. Weight control, endocrine hormones and cancer prevention. Exp Biol Med (Maywood) 2013; 238:502-8. [PMID: 23856901 DOI: 10.1177/1535370213480695] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
The prevalence of obesity is increasing which becomes worrisome due to its association with several diseases and certain types of cancers. While weight control through dietary caloric restriction and/or physical activity protects against cancer in animal models, the underlying mechanisms are not fully defined. Weight loss due to negative energy balance is associated with alterations of multiple growth factors and endocrine hormones. The altered hormones and hormone-related functions appear to be responsible for anti-cancer mechanisms. In this review, we summarize the recent studies related to weight loss and the altered endocrine hormones, focusing on the reduced levels of the mitogenic insulin-like growth factor 1 (IGF-1) and adipokine leptin as well as the raised levels of adiponectin and glucocorticoids. The potential molecular targets of these hormone-dependent signalling pathways are also discussed. Considering the increasing trends of obesity throughout the world, a better understanding of the underlying mechanisms between body weight, endocrine hormones and cancer risk may lead to novel approaches to cancer prevention and treatment.
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Affiliation(s)
- Brenee King
- Department of Human Nutrition, Kansas State University, Manhattan, KS 66506, USA
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26
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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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Abstract
BACKGROUND Breast cancer is the most commonly diagnosed cancer among women in the United States. Extensive research has been completed to evaluate the relationship between dietary factors and breast cancer risk and survival after breast cancer; however, a summary report with clinical inference is needed. Materials and METHODS This review summarizes the current epidemiological and clinical trial evidence relating diet to breast cancer incidence, recurrence, survival, and mortality. The review includes emerging epidemiological studies that assess risk within breast cancer subtypes as well as a summary of previous and ongoing dietary intervention trials designed to modify breast cancer risk. RESULTS The available literature suggests that both low-fat and high-fiber diets may be weakly protective against breast cancer, whereas total energy intake and alcohol appear to be positively associated. Fiber may be weakly protective possibly through modulation of estrogen, whereas fruit and vegetable intake is not clearly associated with risk. Obesity is a risk factor for postmenopausal disease, and adult weight gain should be avoided to reduce risk. In survivors, diet has the greatest potential influence on overall mortality rather than breast cancer-specific events. CONCLUSION Diet is modestly associated with breast cancer risk; associations appear more pronounced for postmenopausal disease, and healthy choices after diagnosis and treatment likely support longevity more so than reduced risk for recurrent disease.
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Affiliation(s)
- Cynthia A Thomson
- Mel and Enid Zuckerman College of Public Health, University of Arizona, Tucson, AZ 85724, USA.
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28
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Giles ED, Wellberg EA, Astling DP, Anderson SM, Thor AD, Jindal S, Tan AC, Schedin PS, Maclean PS. Obesity and overfeeding affecting both tumor and systemic metabolism activates the progesterone receptor to contribute to postmenopausal breast cancer. Cancer Res 2012; 72:6490-501. [PMID: 23222299 DOI: 10.1158/0008-5472.can-12-1653] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Obese postmenopausal women have increased risk of breast cancers with poorer clinical outcomes than their lean counterparts. However, the mechanisms underlying these associations are poorly understood. Rodent model studies have recently identified a period of vulnerability for mammary cancer promotion, which emerges during weight gain after the loss of ovarian function (surgical ovariectomy; OVX). Thus, a period of transient weight gain may provide a life cycle-specific opportunity to prevent or treat postmenopausal breast cancer. We hypothesized that a combination of impaired metabolic regulation in obese animals prior to OVX plus an OVX-induced positive energy imbalance might cooperate to drive tumor growth and progression. To determine if lean and obese rodents differ in their metabolic response to OVX-induced weight gain, and whether this difference affects later mammary tumor metabolism, we performed a nutrient tracer study during the menopausal window of vulnerability. Lean animals preferentially deposited excess nutrients to mammary and peripheral tissues rather than to the adjacent tumors. Conversely, obese animals deposited excess nutrients into the tumors themselves. Notably, tumors from obese animals also displayed increased expression of the progesterone receptor (PR). Elevated PR expression positively correlated with tumor expression of glycolytic and lipogenic enzymes, glucose uptake, and proliferation markers. Treatment with the antidiabetic drug metformin during ovariectomy-induced weight gain caused tumor regression and downregulation of PR expression in tumors. Clinically, expression array analysis of breast tumors from postmenopausal women revealed that PR expression correlated with a similar pattern of metabolic upregulation, supporting the notion that PR+ tumors have enhanced metabolic capacity after menopause. Our findings have potential explanative power in understanding why obese, postmenopausal women display an increased risk of breast cancer.
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Affiliation(s)
- Erin D Giles
- Anschutz Health and Wellness Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado 80045, USA
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29
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Jiang W, Zhu Z, Thompson HJ. Effects of limiting energy availability via diet and physical activity on mammalian target of rapamycin-related signaling in rat mammary carcinomas. Carcinogenesis 2012; 34:378-87. [PMID: 23125225 DOI: 10.1093/carcin/bgs350] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
This study evaluated how different approaches to limiting energy availability (LEA) by 15% affected mammalian target of rapamycin (mTOR)-related signaling in mammary carcinomas. Female Sprague Dawley rats, injected with 50mg 1-methyl-1-nitrosourea per kilogram body weight, were randomized to a control or three LEA interventions: (i) sedentary and restricted rats fed to 85% of energy available to the control or motorized wheel running (37 m/min) for an average of (ii) 1621 ± 55 (WRL) or (iii) 3094 ± 126 (WRH) meters/day with food intake adjusted to provide the same net amount of available energy across LEA interventions. Under these conditions, LEA reduced overall cancer burden by 28% (P = 0.04) and down-regulated mTOR-related signaling (Hotelling multivariate, P = 0.002). Among the regulatory nodes assessed, reduced levels of activated protein kinase B (pAkt) and induction of sirtuin 1 (SIRT1) were the most influential factors in distinguishing between sham control and LEA carcinomas. P-Akt was predictive of observed changes in levels of proteins involved in cell cycle control (r = 0.698, P < 0.0001) and induction of apoptosis (r = -0.429, P = 0.014). Plasma insulin and leptin were strongly associated with carcinoma pAkt levels. Consistent with downregulation of mTOR-related signaling by LEA, evidence of decreased lipid synthesis in carcinomas was observed (Hotelling multivariate, P < 0.001) and was negatively correlated with SIRT1 induction. Despite large differences between control and LEA, effects on mTOR regulation were insufficient to distinguish among LEA intervention groups. Given the modest effects observed on the LKB1/AMP-activated protein kinase regulatory node, NADH and NADPH rather than ATP may be more limiting for tumor growth when LEA is 15%.
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Affiliation(s)
- Weiqin Jiang
- Cancer Prevention Laboratory, Colorado State University, Fort Collins, CO 80523, USA
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30
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Hursting SD, Digiovanni J, Dannenberg AJ, Azrad M, Leroith D, Demark-Wahnefried W, Kakarala M, Brodie A, Berger NA. Obesity, energy balance, and cancer: new opportunities for prevention. Cancer Prev Res (Phila) 2012; 5:1260-72. [PMID: 23034147 DOI: 10.1158/1940-6207.capr-12-0140] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Obesity is associated with increased risk and poor prognosis for many types of cancer. The mechanisms underlying the obesity-cancer link are becoming increasingly clear and provide multiple opportunities for primary to tertiary prevention. Several obesity-related host factors can influence tumor initiation, progression and/or response to therapy, and these have been implicated as key contributors to the complex effects of obesity on cancer incidence and outcomes. These host factors include insulin, insulin-like growth factor-I, leptin, adiponectin, steroid hormones, cytokines, and inflammation-related molecules. Each of these host factors is considered in the context of energy balance and as potential targets for cancer prevention. The possibility of prevention at the systems level, including energy restriction, dietary composition, and exercise is considered as is the importance of the newly emerging field of stem cell research as a model for studying energy balance and cancer prevention.
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