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Cefis M, Dargegen M, Marcangeli V, Taherkhani S, Dulac M, Leduc-Gaudet JP, Mayaki D, Hussain SNA, Gouspillou G. MFN2 overexpression in skeletal muscles of young and old mice causes a mild hypertrophy without altering mitochondrial respiration and H 2O 2 emission. Acta Physiol (Oxf) 2024; 240:e14119. [PMID: 38400630 DOI: 10.1111/apha.14119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 02/06/2024] [Accepted: 02/11/2024] [Indexed: 02/25/2024]
Abstract
AIM Sarcopenia, the aging-related loss of muscle mass and function, is a debilitating process negatively impacting the quality of life of affected individuals. Although the mechanisms underlying sarcopenia are incompletely understood, impairments in mitochondrial dynamics, including mitochondrial fusion, have been proposed as a contributing factor. However, the potential of upregulating mitochondrial fusion proteins to alleviate the effects of aging on skeletal muscles remains unexplored. We therefore hypothesized that overexpressing Mitofusin 2 (MFN2) in skeletal muscle in vivo would mitigate the effects of aging on muscle mass and improve mitochondrial function. METHODS MFN2 was overexpressed in young (7 mo) and old (24 mo) male mice for 4 months through intramuscular injections of an adeno-associated viruses. The impacts of MFN2 overexpression on muscle mass and fiber size (histology), mitochondrial respiration, and H2O2 emission (Oroboros fluororespirometry), and various signaling pathways (qPCR and western blotting) were investigated. RESULTS MFN2 overexpression increased muscle mass and fiber size in both young and old mice. No sign of fibrosis, necrosis, or inflammation was found upon MFN2 overexpression, indicating that the hypertrophy triggered by MFN2 overexpression was not pathological. MFN2 overexpression even reduced the proportion of fibers with central nuclei in old muscles. Importantly, MFN2 overexpression had no impact on muscle mitochondrial respiration and H2O2 emission in both young and old mice. MFN2 overexpression attenuated the increase in markers of impaired autophagy in old muscles. CONCLUSION MFN2 overexpression may be a viable approach to mitigate aging-related muscle atrophy and may have applications for other muscle disorders.
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Affiliation(s)
- Marina Cefis
- Département des sciences de l'activité physique, Faculté des Sciences, UQÀM, Montréal, Québec, Canada
| | - Manon Dargegen
- Département des sciences de l'activité physique, Faculté des Sciences, UQÀM, Montréal, Québec, Canada
| | - Vincent Marcangeli
- Département des sciences de l'activité physique, Faculté des Sciences, UQÀM, Montréal, Québec, Canada
- Département des sciences biologiques, Faculté des Sciences, UQÀM, Montréal, Québec, Canada
| | - Shima Taherkhani
- Département des sciences de l'activité physique, Faculté des Sciences, UQÀM, Montréal, Québec, Canada
- Département des sciences biologiques, Faculté des Sciences, UQÀM, Montréal, Québec, Canada
| | - Maude Dulac
- Division of Experimental Medicine, Department of Medicine, McGill University, Montréal, Québec, Canada
| | - Jean-Philippe Leduc-Gaudet
- Research Group in Cellular Signaling, Department of Medical Biology, Université du Québec À Trois-Rivières, Trois-Rivières, Québec, Canada
| | - Dominique Mayaki
- Division of Experimental Medicine, Department of Medicine, McGill University, Montréal, Québec, Canada
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Department of Critical Care, Research Institute of the McGill University Health Centre, Montréal, Québec, Canada
| | - Sabah N A Hussain
- Division of Experimental Medicine, Department of Medicine, McGill University, Montréal, Québec, Canada
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Department of Critical Care, Research Institute of the McGill University Health Centre, Montréal, Québec, Canada
| | - Gilles Gouspillou
- Département des sciences de l'activité physique, Faculté des Sciences, UQÀM, Montréal, Québec, Canada
- Meakins-Christie Laboratories and Translational Research in Respiratory Diseases Program, Department of Critical Care, Research Institute of the McGill University Health Centre, Montréal, Québec, Canada
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2
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Lei Y, Gan M, Qiu Y, Chen Q, Wang X, Liao T, Zhao M, Chen L, Zhang S, Zhao Y, Niu L, Wang Y, Zhu L, Shen L. The role of mitochondrial dynamics and mitophagy in skeletal muscle atrophy: from molecular mechanisms to therapeutic insights. Cell Mol Biol Lett 2024; 29:59. [PMID: 38654156 PMCID: PMC11036639 DOI: 10.1186/s11658-024-00572-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 04/04/2024] [Indexed: 04/25/2024] Open
Abstract
Skeletal muscle is the largest metabolic organ of the human body. Maintaining the best quality control and functional integrity of mitochondria is essential for the health of skeletal muscle. However, mitochondrial dysfunction characterized by mitochondrial dynamic imbalance and mitophagy disruption can lead to varying degrees of muscle atrophy, but the underlying mechanism of action is still unclear. Although mitochondrial dynamics and mitophagy are two different mitochondrial quality control mechanisms, a large amount of evidence has indicated that they are interrelated and mutually regulated. The former maintains the balance of the mitochondrial network, eliminates damaged or aged mitochondria, and enables cells to survive normally. The latter degrades damaged or aged mitochondria through the lysosomal pathway, ensuring cellular functional health and metabolic homeostasis. Skeletal muscle atrophy is considered an urgent global health issue. Understanding and gaining knowledge about muscle atrophy caused by mitochondrial dysfunction, particularly focusing on mitochondrial dynamics and mitochondrial autophagy, can greatly contribute to the prevention and treatment of muscle atrophy. In this review, we critically summarize the recent research progress on mitochondrial dynamics and mitophagy in skeletal muscle atrophy, and expound on the intrinsic molecular mechanism of skeletal muscle atrophy caused by mitochondrial dynamics and mitophagy. Importantly, we emphasize the potential of targeting mitochondrial dynamics and mitophagy as therapeutic strategies for the prevention and treatment of muscle atrophy, including pharmacological treatment and exercise therapy, and summarize effective methods for the treatment of skeletal muscle atrophy.
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Affiliation(s)
- Yuhang Lei
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Mailin Gan
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yanhao Qiu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qiuyang Chen
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xingyu Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Tianci Liao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Mengying Zhao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lei Chen
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shunhua Zhang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Ye Zhao
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lili Niu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yan Wang
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Li Zhu
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China.
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China.
| | - Linyuan Shen
- Farm Animal Genetic Resources Exploration and Innovation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China.
- Key Laboratory of Livestock and Poultry Multi-Omics, Ministry of Agriculture and Rural Affairs, College of Animal and Technology, Sichuan Agricultural University, Chengdu, 611130, China.
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Potes Y, Díaz-Luis A, Bermejo-Millo JC, Pérez-Martínez Z, de Luxán-Delgado B, Rubio-González A, Menéndez-Valle I, Gutiérrez-Rodríguez J, Solano JJ, Caballero B, Vega-Naredo I, Coto-Montes A. Melatonin Alleviates the Impairment of Muscle Bioenergetics and Protein Quality Control Systems in Leptin-Deficiency-Induced Obesity. Antioxidants (Basel) 2023; 12:1962. [PMID: 38001815 PMCID: PMC10669624 DOI: 10.3390/antiox12111962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 10/30/2023] [Accepted: 10/31/2023] [Indexed: 11/26/2023] Open
Abstract
Leptin is critically compromised in the major common forms of obesity. Skeletal muscle is the main effector tissue for energy modification that occurs as a result of the effect of endocrine axes, such as leptin signaling. Our study was carried out using skeletal muscle from a leptin-deficient animal model, in order to ascertain the importance of this hormone and to identify the major skeletal muscle mechanisms affected. We also examined the therapeutic role of melatonin against leptin-induced muscle wasting. Here, we report that leptin deficiency stimulates fatty acid β-oxidation, which results in mitochondrial uncoupling and the suppression of mitochondrial oxidative damage; however, it increases cytosolic oxidative damage. Thus, different nutrient-sensing pathways are disrupted, impairing proteostasis and promoting lipid anabolism, which induces myofiber degeneration and drives oxidative type I fiber conversion. Melatonin treatment plays a significant role in reducing cellular oxidative damage and regulating energy homeostasis and fuel utilization. Melatonin is able to improve both glucose and mitochondrial metabolism and partially restore proteostasis. Taken together, our study demonstrates melatonin to be a decisive mitochondrial function-fate regulator in skeletal muscle, with implications for resembling physiological energy requirements and targeting glycolytic type II fiber recovery.
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Affiliation(s)
- Yaiza Potes
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), 33006 Oviedo, Spain
| | - Andrea Díaz-Luis
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
| | - Juan C. Bermejo-Millo
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), 33006 Oviedo, Spain
| | - Zulema Pérez-Martínez
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Microbiology Service, Central University Hospital of Asturias, 33011 Oviedo, Spain
| | - Beatriz de Luxán-Delgado
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
| | - Adrian Rubio-González
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
| | - Iván Menéndez-Valle
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), 33006 Oviedo, Spain
- Immunology Service, Central University Hospital of Asturias, 33011 Oviedo, Spain
| | - José Gutiérrez-Rodríguez
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Geriatric Service, Monte Naranco Hospital, 33012 Oviedo, Spain
| | - Juan J. Solano
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Geriatric Service, Monte Naranco Hospital, 33012 Oviedo, Spain
| | - Beatriz Caballero
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), 33006 Oviedo, Spain
| | - Ignacio Vega-Naredo
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), 33006 Oviedo, Spain
| | - Ana Coto-Montes
- Department of Morphology and Cell Biology, Faculty of Medicine, University of Oviedo, 33006 Oviedo, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Spain
- Institute of Neurosciences of the Principality of Asturias (INEUROPA), 33006 Oviedo, Spain
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4
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Djalalvandi A, Scorrano L. Mitochondrial dynamics: roles in exercise physiology and muscle mass regulation. CURRENT OPINION IN PHYSIOLOGY 2022. [DOI: 10.1016/j.cophys.2022.100550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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5
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Kang EA, Park JM, Jin W, Tchahc H, Kwon KA, Hahm KB. Amelioration of cancer cachexia with preemptive administration of tumor necrosis factor-α blocker. J Clin Biochem Nutr 2022; 70:117-128. [PMID: 35400817 PMCID: PMC8921719 DOI: 10.3164/jcbn.21-21] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 03/30/2021] [Indexed: 02/04/2023] Open
Abstract
Cancer cachexia is syndrome accompanying weight reduction, fat loss, muscle atrophy in patients with advanced cancer. Since tumor necrosis factor-α (TNF-α) played pivotal role in cancer cachexia, we hypothesized preemptive administration of TNF-α antibody might mitigate cancer cachexia. Detailed molecular mechanisms targeting muscle atrophy, cachexic inflammation, and catabolic catastrophe were explored whether TNF-α antibody can antagonize these cachexic mechanisms. Stimulated with preliminary finding human antibody, infliximab or adalimumab, significantly inhibited TNF-α as well as their signals relevant to cachexia in mice, preemptive administration of 1.5 mg/kg adalimumab was done in C-26-induced cancer cachexia. Adalimumab significantly mitigated cancer cachexia manifested with significantly lesser weight loss, leg muscle preservation, and higher survival compared to cachexia control (p<0.05). Significant ameliorating action of muscle atrophy were accompanied significant decreases of muscle-specific UPS like atrogin-1/MuRF-1, Pax-7, PCG-1α, and Mfn-2 after adalimumab (p<0.01) and significantly attenuated lipolysis with inhibition of ATGL HSL, and MMPs. Cachexic factors including IL-6 expression, serum IL-6, gp130, IL-6R, JAK2, and STAT3 were significantly inhibited with adalimumab (p<0.01). Genes implicated in cachexic inflammation like NF-κB, c-Jun/c-Fos, and MAPKs were significantly repressed, while mTOR/AKT was significantly increased adalimumab (p<0.05). Conclusively, preemptive administration of adalimumab can be tried in high risk to cancer cachexia.
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Affiliation(s)
- Eun A Kang
- CHA Cancer Prevention Research Center, CHA Bio Complex, CHA University
| | | | - Wook Jin
- Department of Pediatrics, Gachon University Gil Hospital
| | - Hann Tchahc
- Department of Pediatrics, Gachon University Gil Hospital
| | - Kwang An Kwon
- Department of Gastroenterology, Gachon University Gil Hospital
| | - Ki Baik Hahm
- CHA Cancer Prevention Research Center, CHA Bio Complex, CHA University
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6
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Huot JR, Pin F, Narasimhan A, Novinger LJ, Keith AS, Zimmers TA, Willis MS, Bonetto A. ACVR2B antagonism as a countermeasure to multi-organ perturbations in metastatic colorectal cancer cachexia. J Cachexia Sarcopenia Muscle 2020; 11:1779-1798. [PMID: 33200567 PMCID: PMC7749603 DOI: 10.1002/jcsm.12642] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 09/11/2020] [Accepted: 10/12/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Advanced colorectal cancer (CRC) is often accompanied by the development of liver metastases, as well as cachexia, a multi-organ co-morbidity primarily affecting skeletal (SKM) and cardiac muscles. Activin receptor type 2B (ACVR2B) signalling is known to cause SKM wasting, and its inhibition restores SKM mass and prolongs survival in cancer. Using a recently generated mouse model, here we tested whether ACVR2B blockade could preserve multiple organs, including skeletal and cardiac muscle, in the presence of metastatic CRC. METHODS NSG male mice (8 weeks old) were injected intrasplenically with HCT116 human CRC cells (mHCT116), while sham-operated animals received saline (n = 5-10 per group). Sham and tumour-bearing mice received weekly injections of ACVR2B/Fc, a synthetic peptide inhibitor of ACVR2B. RESULTS mHCT116 hosts displayed losses in fat mass ( - 79%, P < 0.0001), bone mass ( - 39%, P < 0.05), and SKM mass (quadriceps: - 22%, P < 0.001), in line with reduced muscle cross-sectional area ( - 24%, P < 0.01) and plantarflexion force ( - 28%, P < 0.05). Further, despite only moderately affected heart size, cardiac function was significantly impaired (ejection fraction %: - 16%, P < 0.0001; fractional shortening %: - 25%, P < 0.0001) in the mHCT116 hosts. Conversely, ACVR2B/Fc preserved fat mass ( + 238%, P < 0.001), bone mass ( + 124%, P < 0.0001), SKM mass (quadriceps: + 31%, P < 0.0001), size (cross-sectional area: + 43%, P < 0.0001) and plantarflexion force ( + 28%, P < 0.05) in tumour hosts. Cardiac function was also completely preserved in tumour hosts receiving ACVR2B/Fc (ejection fraction %: + 19%, P < 0.0001), despite no effect on heart size. RNA sequencing analysis of heart muscle revealed rescue of genes related to cardiac development and contraction in tumour hosts treated with ACVR2B/Fc. CONCLUSIONS Our metastatic CRC model recapitulates the multi-systemic derangements of cachexia by displaying loss of fat, bone, and SKM along with decreased muscle strength in mHCT116 hosts. Additionally, with evidence of severe cardiac dysfunction, our data support the development of cardiac cachexia in the occurrence of metastatic CRC. Notably, ACVR2B antagonism preserved adipose tissue, bone, and SKM, whereas muscle and cardiac functions were completely maintained upon treatment. Altogether, our observations implicate ACVR2B signalling in the development of multi-organ perturbations in metastatic CRC and further dictate that ACVR2B represents a promising therapeutic target to preserve body composition and functionality in cancer cachexia.
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Affiliation(s)
- Joshua R Huot
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Fabrizio Pin
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Ashok Narasimhan
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Leah J Novinger
- Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA
| | | | - Teresa A Zimmers
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, USA.,Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Monte S Willis
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, USA.,Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN, USA
| | - Andrea Bonetto
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, USA.,Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, USA.,Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, USA.,Simon Comprehensive Cancer Center, Indiana University School of Medicine, Indianapolis, IN, USA
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7
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Yang W, Huang J, Wu H, Wang Y, Du Z, Ling Y, Wang W, Wu Q, Gao W. Molecular mechanisms of cancer cachexia‑induced muscle atrophy (Review). Mol Med Rep 2020; 22:4967-4980. [PMID: 33174001 PMCID: PMC7646947 DOI: 10.3892/mmr.2020.11608] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2020] [Accepted: 09/09/2020] [Indexed: 12/20/2022] Open
Abstract
Muscle atrophy is a severe clinical problem involving the loss of muscle mass and strength that frequently accompanies the development of numerous types of cancer, including pancreatic, lung and gastric cancers. Cancer cachexia is a multifactorial syndrome characterized by a continuous decline in skeletal muscle mass that cannot be reversed by conventional nutritional therapy. The pathophysiological characteristic of cancer cachexia is a negative protein and energy balance caused by a combination of factors, including reduced food intake and metabolic abnormalities. Numerous necessary cellular processes are disrupted by the presence of abnormal metabolites, which mediate several intracellular signaling pathways and result in the net loss of cytoplasm and organelles in atrophic skeletal muscle during various states of cancer cachexia. Currently, the clinical morbidity and mortality rates of patients with cancer cachexia are high. Once a patient enters the cachexia phase, the consequences are difficult to reverse and the treatment methods for cancer cachexia are very limited. The present review aimed to summarize the recent discoveries regarding the pathogenesis of cancer cachexia-induced muscle atrophy and provided novel ideas for the comprehensive treatment to improve the prognosis of affected patients.
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Affiliation(s)
- Wei Yang
- Department of Oncology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518000, P.R. China
| | - Jianhui Huang
- Department of Oncology, Lishui Municipal Central Hospital, Lishui, Zhejiang 323000, P.R. China
| | - Hui Wu
- Department of Clinical Medicine, Anhui University of Science and Technology, Huainan, Anhui 232001, P.R. China
| | - Yuqing Wang
- Department of Clinical Medicine, Anhui University of Science and Technology, Huainan, Anhui 232001, P.R. China
| | - Zhiyin Du
- Department of Clinical Medicine, Anhui University of Science and Technology, Huainan, Anhui 232001, P.R. China
| | - Yuanbo Ling
- Department of Clinical Medicine, Anhui University of Science and Technology, Huainan, Anhui 232001, P.R. China
| | - Weizhuo Wang
- Department of Clinical Medicine, Anhui University of Science and Technology, Huainan, Anhui 232001, P.R. China
| | - Qian Wu
- Department of Oncology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518000, P.R. China
| | - Wenbin Gao
- Department of Oncology, The Third Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong 518000, P.R. China
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8
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Penna F, Ballarò R, Costelli P. The Redox Balance: A Target for Interventions Against Muscle Wasting in Cancer Cachexia? Antioxid Redox Signal 2020; 33:542-558. [PMID: 32037856 DOI: 10.1089/ars.2020.8041] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Significance: The management of cancer patients is frequently complicated by the occurrence of a complex syndrome known as cachexia. It is mainly characterized by muscle wasting, a condition that associates with enhanced protein breakdown and with negative energy balance. While the mechanisms underlying cachexia have been only partially elucidated, understanding the pathogenesis of muscle wasting in cancer hosts is mandatory to design new targeted therapeutic strategies. Indeed, most of cancer patients will experience cachexia during the course of their disease, and about 25% of cancer-related deaths are due to this syndrome, rather than to the tumor itself. Recent Advances: Compelling evidence suggests that an altered redox homeostasis likely contributes to cancer-induced muscle protein depletion, directly or indirectly activating the intracellular degradative pathways. In addition, oxidative stress impinges on both mitochondrial number and function; the other way round, altered mitochondria lead to enhanced redox imbalance, creating a vicious loop that eventually results in negative energy metabolism. Critical Issues: The present review focuses on the possibility that pharmacological and nonpharmacological strategies able to restore a physiologic redox balance could be useful components of treatment schedules aimed at counteracting cancer-induced muscle wasting. Future Directions: Exercise and the use of exercise mimetic drugs represent the most promising approaches capable of reinforcing the muscle antioxidant defenses of cancer patients. The results from ongoing and new clinical trials are needed to validate the preclinical studies and provide effective therapies for cancer cachexia. Antioxid. Redox Signal. 33, 542-558.
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Affiliation(s)
- Fabio Penna
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Riccardo Ballarò
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
| | - Paola Costelli
- Department of Clinical and Biological Sciences, University of Torino, Torino, Italy
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9
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Dave DT, Patel BM. Mitochondrial Metabolism in Cancer Cachexia: Novel Drug Target. Curr Drug Metab 2020; 20:1141-1153. [PMID: 31418657 DOI: 10.2174/1389200220666190816162658] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 07/23/2019] [Accepted: 07/25/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Cancer cachexia is a metabolic syndrome prevalent in the majority of the advanced cancers and is associated with complications such as anorexia, early satiety, weakness, anaemia, and edema, thereby reducing performance and impairing quality of life. Skeletal muscle wasting is a characteristic feature of cancer-cachexia and mitochondria is responsible for regulating total protein turnover in skeletal muscle tissue. METHODS We carried out exhaustive search for cancer cachexia and role of mitochondria in the same in various databases. All the relevant articles were gathered and the pertinent information was extracted out and compiled which was further structured into different sub-sections. RESULTS Various findings on the mitochondrial alterations in connection to its disturbed normal physiology in various models of cancer-cachexia have been recently reported, suggesting a significant role of the organelle in the pathogenesis of the complications involved in the disorder. It has also been reported that reduced mitochondrial oxidative capacity is due to reduced mitochondrial biogenesis as well as altered balance between fusion and fission protein activities. Moreover, autophagy in mitochondria (termed as mitophagy) is reported to play an important role in cancer cachexia. CONCLUSION The present review aims to put forth the changes occurring in mitochondria and hence explore possible targets which can be exploited in cancer-induced cachexia for treatment of such a debilitating condition.
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Affiliation(s)
- Dhwani T Dave
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Sarkhej-Gandhinagar Highway, Ahmedabad 382481, Gujarat, India
| | - Bhoomika M Patel
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Sarkhej-Gandhinagar Highway, Ahmedabad 382481, Gujarat, India
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10
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Huot JR, Novinger LJ, Pin F, Narasimhan A, Zimmers TA, O'Connell TM, Bonetto A. Formation of colorectal liver metastases induces musculoskeletal and metabolic abnormalities consistent with exacerbated cachexia. JCI Insight 2020; 5:136687. [PMID: 32298240 DOI: 10.1172/jci.insight.136687] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 04/08/2020] [Indexed: 12/18/2022] Open
Abstract
Advanced colorectal cancer (CRC) is often accompanied by development of liver metastases (LMs) and skeletal muscle wasting (i.e., cachexia). Despite plaguing the majority of CRC patients, cachexia remains unresolved. By using mice injected with Colon-26 mouse tumors, either subcutaneously (s.c.; C26) or intrasplenically to mimic hepatic dissemination of cancer cells (mC26), here we aimed to further characterize functional, molecular, and metabolic effects on skeletal muscle and examine whether LMs exacerbate CRC-induced cachexia. C26-derived LMs were associated with progressive loss of body weight, as well as with significant reductions in skeletal muscle size and strength, in line with reduced phosphorylation of markers of protein anabolism and enhanced protein catabolism. mC26 hosts showed prevalence of fibers with glycolytic metabolism and enhanced lipid accumulation, consistent with abnormalities of mitochondrial homeostasis and energy metabolism. In a comparison with mice bearing s.c. C26, cachexia appeared exacerbated in the mC26 hosts, as also supported by differentially expressed pathways within skeletal muscle. Overall, our model recapitulates the cachectic phenotype of metastatic CRC and reveals that formation of LMs resulting from CRC exacerbate cancer-induced skeletal muscle wasting by promoting differential gene expression signatures.
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Affiliation(s)
- Joshua R Huot
- Department of Surgery.,Department of Anatomy, Cell Biology and Physiology
| | | | - Fabrizio Pin
- Department of Anatomy, Cell Biology and Physiology
| | | | - Teresa A Zimmers
- Department of Surgery.,Department of Anatomy, Cell Biology and Physiology.,Simon Cancer Center, and.,Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Thomas M O'Connell
- Department of Anatomy, Cell Biology and Physiology.,Department of Otolaryngology-Head & Neck Surgery.,Simon Cancer Center, and.,Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Andrea Bonetto
- Department of Surgery.,Department of Anatomy, Cell Biology and Physiology.,Department of Otolaryngology-Head & Neck Surgery.,Simon Cancer Center, and.,Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, Indiana, USA
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11
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Huot JR, Novinger LJ, Pin F, Bonetto A. HCT116 colorectal liver metastases exacerbate muscle wasting in a mouse model for the study of colorectal cancer cachexia. Dis Model Mech 2020; 13:dmm043166. [PMID: 31915140 PMCID: PMC6994937 DOI: 10.1242/dmm.043166] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 12/16/2019] [Indexed: 12/24/2022] Open
Abstract
Colorectal cancer (CRC) is often accompanied by formation of liver metastases (LM) and skeletal muscle wasting, i.e. cachexia. Despite affecting the majority of CRC patients, cachexia remains underserved, understudied and uncured. Animal models for the study of CRC-induced cachexia, in particular models containing LM, are sparse; therefore, we aimed to characterize two new models of CRC cachexia. Male NSG mice were injected subcutaneously (HCT116) or intrasplenically (mHCT116) with human HCT116 CRC tumor cells to disseminate LM, whereas experimental controls received saline (n=5-8/group). Tumor growth was accompanied by loss of skeletal muscle mass (HCT116: -20%; mHCT116: -31%; quadriceps muscle) and strength (HCT116: -20%; mHCT116: -27%), with worsened loss of skeletal muscle mass in mHCT116 compared with HCT116 (gastrocnemius: -19%; tibialis anterior: -22%; quadriceps: -21%). Molecular analyses revealed elevated protein ubiquitination in HCT116, whereas mHCT116 also displayed elevated Murf1 and atrogin-1 expression, along with reduced mitochondrial proteins PGC1α, OPA1, mitofusin 2 and cytochrome C. Further, elevated IL6 levels were found in the blood of mHCT116 hosts, which was associated with higher phosphorylation of STAT3 in skeletal muscle. To clarify whether STAT3 was a main player in muscle wasting in this model, HCT116 cells were co-cultured with C2C12 myotubes. Marked myotube atrophy (-53%) was observed, along with elevated phospho-STAT3 levels (+149%). Conversely, inhibition of STAT3 signaling by means of a JAK/STAT3 inhibitor was sufficient to rescue myotube atrophy induced by HCT116 cells (+55%). Overall, our results indicate that the formation of LM exacerbates cachectic phenotype and associated skeletal muscle molecular alterations in HCT116 tumor hosts.
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Affiliation(s)
- Joshua R Huot
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Leah J Novinger
- Department of Otolaryngology - Head & Neck Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Fabrizio Pin
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Andrea Bonetto
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Department of Otolaryngology - Head & Neck Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- IUPUI Center for Cachexia Research Innovation and Therapy, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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12
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Chen L, Chen L, Wan L, Huo Y, Huang J, Li J, Lu J, Xin B, Yang Q, Guo C. Matrine improves skeletal muscle atrophy by inhibiting E3 ubiquitin ligases and activating the Akt/mTOR/FoxO3α signaling pathway in C2C12 myotubes and mice. Oncol Rep 2019; 42:479-494. [PMID: 31233199 PMCID: PMC6610044 DOI: 10.3892/or.2019.7205] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 05/14/2019] [Indexed: 12/16/2022] Open
Abstract
Skeletal muscle wasting is a feature of cancer cachexia that increases patient morbidity and mortality. Matrine, the main bioactive component of Sophora flavescens, has been approved for the prevention and therapy of cancer cachexia in China. However, to the best of our knowledge, its mechanism in improving muscle wasting remains unknown. The present study demonstrated that matrine increases muscle fiber size and muscle mass in an in vivo CT26 colon adenocarcinoma cachexia mouse model. Concurrently, other cachexia symptoms, including body and organ weight loss, were alleviated. In in vitro experiments, matrine substantially improved C2C12 myoblast differentiation with or without dexamethasone treatment. In addition, matrine reduced C2C12 myotube atrophy and apoptosis induced by dexamethasone, tumor necrosis factor α and conditioned medium. Two E3 ubiquitin ligases, muscle RING-finger containing protein-1 and muscle atrophy Fbox protein, which are specifically expressed in wasting skeletal muscle, were also significantly downregulated (P<0.05) by matrine both in C2C12 myotubes and skeletal muscle. Furthermore, matrine increased the phosphorylation of Akt, mTOR and FoxO3α in the atrophying C2C12 myotube induced by dexamethasone. In conclusion, matrine can alleviate muscle atrophy and improve myoblast differentiation possibly by inhibiting E3 ubiquitin ligases and activating the Akt/mTOR/FoxO3α signaling pathway.
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Affiliation(s)
- Li Chen
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Linlin Chen
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Lili Wan
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Yan Huo
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Jinlu Huang
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Jie Li
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Jin Lu
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Bo Xin
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Quanjun Yang
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
| | - Cheng Guo
- Department of Pharmacy, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Shanghai 200233, P.R. China
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13
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Shenoy PS, Sen U, Kapoor S, Ranade AV, Chowdhury CR, Bose B. Sodium fluoride induced skeletal muscle changes: Degradation of proteins and signaling mechanism. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 244:534-548. [PMID: 30384060 DOI: 10.1016/j.envpol.2018.10.034] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 10/04/2018] [Accepted: 10/05/2018] [Indexed: 06/08/2023]
Abstract
Fluoride is a well-known compound for its usefulness in healing dental caries. Similarly, fluoride is also known for its toxicity to various tissues in animals and humans. It causes skeletal fluorosis leading to osteoporosis of the bones. We hypothesized that when bones are affected by fluoride, the skeletal muscles are also likely to be affected by underlying molecular events involving myogenic differentiation. Murine myoblasts C2C12 were cultured in differentiation media with or without NaF (1 ppm-5 ppm) for four days. The effects of NaF on myoblasts and myotubes when exposed to low (1.5 ppm) and high concentration (5 ppm) were assessed based on the proliferation, alteration in gene expression, ROS production, and production of inflammatory cytokines. Changes based on morphology, multinucleated myotube formation, expression of MyHC1 and signaling pathways were also investigated. Concentrations of NaF tested had no effects on cell viability. NaF at low concentration (1.5 ppm) caused myoblast proliferation and when subjected to myogenic differentiation it induced hypertrophy of the myotubes by activating the IGF-1/AKT pathway. NaF at higher concentration (5 ppm), significantly inhibited myotube formation, increased skeletal muscle catabolism, generated reactive oxygen species (ROS) and inflammatory cytokines (TNF-α and IL-6) in C2C12 cells. NaF also enhanced the production of muscle atrophy-related genes, myostatin, and atrogin-1. The data suggest that NaF at low concentration can be used as muscle enhancing factor (hypertrophy), and at higher concentration, it accelerates skeletal muscle atrophy by activating the ubiquitin-proteosome pathway.
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Affiliation(s)
- P Sudheer Shenoy
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya Deemed to be University, University Road, Mangalore, 575018, Karnataka, India.
| | - Utsav Sen
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya Deemed to be University, University Road, Mangalore, 575018, Karnataka, India
| | - Saketh Kapoor
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya Deemed to be University, University Road, Mangalore, 575018, Karnataka, India
| | - Anu V Ranade
- College of Medicine, University of Sharjah, United Arab Emirates
| | - Chitta R Chowdhury
- Department of Oral Biology & Genomic Studies, A.B.Shetty Memorial Institute of Dental Sciences, Nitte University, Mangalore, 575018, Karnataka, India; School of Health and Life Sciences, Biomedical and Environmental Health Group, De Montfort University, Leicester, United Kingdom
| | - Bipasha Bose
- Stem Cells and Regenerative Medicine Centre, Yenepoya Research Centre, Yenepoya Deemed to be University, University Road, Mangalore, 575018, Karnataka, India.
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14
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Allegra A, Innao V, Allegra AG, Musolino C. Relationship between mitofusin 2 and cancer. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2018; 116:209-236. [PMID: 31036292 DOI: 10.1016/bs.apcsb.2018.11.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Mitochondria are dynamic organelles whose actions are fundamental for cell viability. Within the cell, the mitochondrial system is incessantly modified via the balance between fusion and fission processes. Among other proteins, mitofusin 2 is a central protagonist in all these mitochondrial events (fusion, trafficking, contacts with other organelles), the balance of which causes the correct mitochondrial action, shape, and distribution within the cell. Here we examine the structural and functional characteristics of mitofusin 2, underlining its essential role in numerous intracellular pathways, as well as in the pathogenesis of cancer.
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Affiliation(s)
- Alessandro Allegra
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Messina, Italy.
| | - Vanessa Innao
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Messina, Italy
| | - Andrea Gaetano Allegra
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Messina, Italy
| | - Caterina Musolino
- Division of Hematology, Department of Human Pathology in Adulthood and Childhood "Gaetano Barresi", University of Messina, Messina, Italy
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15
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Castiglioni I, Caccia R, Garcia-Manteiga JM, Ferri G, Caretti G, Molineris I, Nishioka K, Gabellini D. The Trithorax protein Ash1L promotes myoblast fusion by activating Cdon expression. Nat Commun 2018; 9:5026. [PMID: 30487570 PMCID: PMC6262021 DOI: 10.1038/s41467-018-07313-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 10/24/2018] [Indexed: 12/17/2022] Open
Abstract
Myoblast fusion (MF) is required for muscle growth and repair, and its alteration contributes to muscle diseases. The mechanisms governing this process are incompletely understood, and no epigenetic regulator has been previously described. Ash1L is an epigenetic activator belonging to the Trithorax group of proteins and is involved in FSHD muscular dystrophy, autism and cancer. Its physiological role in skeletal muscle is unknown. Here we report that Ash1L expression is positively correlated with MF and reduced in Duchenne muscular dystrophy. In vivo, ex vivo and in vitro experiments support a selective and evolutionary conserved requirement for Ash1L in MF. RNA- and ChIP-sequencing indicate that Ash1L is required to counteract Polycomb repressive activity to allow activation of selected myogenesis genes, in particular the key MF gene Cdon. Our results promote Ash1L as an important epigenetic regulator of MF and suggest that its activity could be targeted to improve cell therapy for muscle diseases. Myoblast fusion in skeletal muscle is a complex process but how this is regulated is unclear. Here, the authors identify Ash1L, a histone methyltransferase, as modulating myoblast fusion via activation of the myogenesis gene Cdon, and observe decreased Ash1L expression in Duchenne muscular dystrophy.
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Affiliation(s)
- Ilaria Castiglioni
- Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, via Olgettina 60, Milano, 20132, Italy
| | - Roberta Caccia
- Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, via Olgettina 60, Milano, 20132, Italy
| | - Jose Manuel Garcia-Manteiga
- Center for Translational Genomics and BioInformatics, IRCCS San Raffaele Scientific Institute, via Olgettina 60, Milano, 20132, Italy
| | - Giulia Ferri
- Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, via Olgettina 60, Milano, 20132, Italy
| | - Giuseppina Caretti
- Department of Biosciences, University of Milan, via Celoria 26, Milano, 20133, Italy
| | - Ivan Molineris
- Center for Translational Genomics and BioInformatics, IRCCS San Raffaele Scientific Institute, via Olgettina 60, Milano, 20132, Italy
| | - Kenichi Nishioka
- Department of Biomolecular Sciences, Division of Molecular Genetics and Epigenetics, Faculty of Medicine, Saga University, Saga, Japan.,Laboratory for Developmental Genetics, RIKEN IMS, 1-7-22 Suehiro-cho, Tsurumi-ku, Yokohama City, Kanagawa, 230-0045, Japan
| | - Davide Gabellini
- Division of Genetics and Cell Biology, IRCCS San Raffaele Scientific Institute, via Olgettina 60, Milano, 20132, Italy.
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16
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Yu F, Xu T, Wang M, Chang W, Li P, Wang J. Function and regulation of mitofusin 2 in cardiovascular physiology and pathology. Eur J Cell Biol 2018; 97:474-482. [DOI: 10.1016/j.ejcb.2018.07.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 07/06/2018] [Accepted: 07/17/2018] [Indexed: 02/03/2023] Open
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