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Wang P, Liu X, Chen Y, Jun-Hao ET, Yao Z, Min-Wen JC, Yan-Jiang BC, Ma S, Ma W, Luo L, Guo L, Song D, Shyh-Chang N. Adult progenitor rejuvenation with embryonic factors. Cell Prolif 2023; 56:e13459. [PMID: 37177849 DOI: 10.1111/cpr.13459] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 03/10/2023] [Accepted: 03/14/2023] [Indexed: 05/15/2023] Open
Abstract
During ageing, adult stem cells' regenerative properties decline, as they undergo replicative senescence and lose both their proliferative and differentiation capacities. In contrast, embryonic and foetal progenitors typically possess heightened proliferative capacities and manifest a more robust regenerative response upon injury and transplantation, despite undergoing many rounds of mitosis. How embryonic and foetal progenitors delay senescence and maintain their proliferative and differentiation capacities after numerous rounds of mitosis, remains unknown. It is also unclear if defined embryonic factors can rejuvenate adult progenitors to confer extended proliferative and differentiation capacities, without reprogramming their lineage-specific fates or inducing oncogenic transformation. Here, we report that a minimal combination of LIN28A, TERT, and sh-p53 (LTS), all of which are tightly regulated and play important roles during embryonic development, can delay senescence in adult muscle progenitors. LTS muscle progenitors showed an extended proliferative capacity, maintained a normal karyotype, underwent myogenesis normally, and did not manifest tumorigenesis nor aberrations in lineage differentiation, even in late passages. LTS treatment promoted self-renewal and rescued the pro-senescence phenotype of aged cachexia patients' muscle progenitors, and promoted their engraftment for skeletal muscle regeneration in vivo. When we examined the mechanistic basis for LIN28A's role in the LTS minimum combo, let-7 microRNA suppression could not fully explain how LIN28A promoted muscle progenitor self-renewal. Instead, LIN28A was promoting the translation of oxidative phosphorylation mRNAs in adult muscle progenitors to optimize mitochondrial reactive oxygen species (mtROS) and mitohormetic signalling. Optimized mtROS induced a variety of mitohormetic stress responses, including the hypoxic response for metabolic damage, the unfolded protein response for protein damage, and the p53 response for DNA damage. Perturbation of mtROS levels specifically abrogated the LIN28A-driven hypoxic response in Hypoxia Inducible Factor-1α (HIF1α) and glycolysis, and thus LTS progenitor self-renewal, without affecting normal or TS progenitors. Our findings connect embryonically regulated factors to mitohormesis and progenitor rejuvenation, with implications for ageing-related muscle degeneration.
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Affiliation(s)
- Peng Wang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Xupeng Liu
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Yu Chen
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Elwin Tan Jun-Hao
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
- Institute of Molecular and Cell Biology, Genome Institute of Singapore, Agency for Science Technology and Research, Singapore, Singapore
- Laboratory of Cancer Therapeutics, Program in Cancer and Stem Cell Biology, Duke-National University of Singapore Medical School, Singapore, Singapore
- Laboratory of Cancer Epigenome, Division of Medical Science, National Cancer Centre Singapore, Singapore, Singapore
| | - Ziyue Yao
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Jason Chua Min-Wen
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
- Institute of Molecular and Cell Biology, Genome Institute of Singapore, Agency for Science Technology and Research, Singapore, Singapore
- Laboratory of Cancer Therapeutics, Program in Cancer and Stem Cell Biology, Duke-National University of Singapore Medical School, Singapore, Singapore
- Laboratory of Cancer Epigenome, Division of Medical Science, National Cancer Centre Singapore, Singapore, Singapore
| | - Benjamin Chua Yan-Jiang
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
- Institute of Molecular and Cell Biology, Genome Institute of Singapore, Agency for Science Technology and Research, Singapore, Singapore
- Laboratory of Cancer Therapeutics, Program in Cancer and Stem Cell Biology, Duke-National University of Singapore Medical School, Singapore, Singapore
- Laboratory of Cancer Epigenome, Division of Medical Science, National Cancer Centre Singapore, Singapore, Singapore
| | - Shilin Ma
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Wenwu Ma
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Lanfang Luo
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Luyao Guo
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Dan Song
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Ng Shyh-Chang
- State Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
- Beijing Institute for Stem Cell and Regenerative Medicine, Institute for Stem Cell and Regeneration, Chinese Academy of Sciences, Beijing, China
- University of Chinese Academy of Sciences, Beijing, China
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2
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Singh SK, Roy R, Kumar S, Srivastava P, Jha S, Rana B, Rana A. Molecular Insights of MAP4K4 Signaling in Inflammatory and Malignant Diseases. Cancers (Basel) 2023; 15:cancers15082272. [PMID: 37190200 PMCID: PMC10136566 DOI: 10.3390/cancers15082272] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Accepted: 04/11/2023] [Indexed: 05/17/2023] Open
Abstract
Mitogen-activated protein kinase (MAPK) cascades are crucial in extracellular signal transduction to cellular responses. The classical three-tiered MAPK cascades include signaling through MAP kinase kinase kinase (MAP3K) that activates a MAP kinase kinase (MAP2K), which in turn induces MAPK activation and downstream cellular responses. The upstream activators of MAP3K are often small guanosine-5'-triphosphate (GTP)-binding proteins, but in some pathways, MAP3K can be activated by another kinase, which is known as a MAP kinase kinase kinase kinase (MAP4K). MAP4K4 is one of the widely studied MAP4K members, known to play a significant role in inflammatory, cardiovascular, and malignant diseases. The MAP4K4 signal transduction plays an essential role in cell proliferation, transformation, invasiveness, adhesiveness, inflammation, stress responses, and cell migration. Overexpression of MAP4K4 is frequently reported in many cancers, including glioblastoma, colon, prostate, and pancreatic cancers. Besides its mainstay pro-survival role in various malignancies, MAP4K4 has been implicated in cancer-associated cachexia. In the present review, we discuss the functional role of MAP4K4 in malignant/non-malignant diseases and cancer-associated cachexia and its possible use in targeted therapy.
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Affiliation(s)
- Sunil Kumar Singh
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Ruchi Roy
- UICentre for Drug Discovery, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Sandeep Kumar
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
- University of Illinois Hospital & Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Piush Srivastava
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Saket Jha
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Basabi Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
- University of Illinois Hospital & Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612, USA
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
| | - Ajay Rana
- Department of Surgery, Division of Surgical Oncology, University of Illinois at Chicago, Chicago, IL 60612, USA
- University of Illinois Hospital & Health Sciences System Cancer Center, University of Illinois at Chicago, Chicago, IL 60612, USA
- Jesse Brown VA Medical Center, Chicago, IL 60612, USA
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3
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Jayawardena TU, Kim SY, Jeon YJ. Sarcopenia; functional concerns, molecular mechanisms involved, and seafood as a nutritional intervention - review article. Crit Rev Food Sci Nutr 2021; 63:1983-2003. [PMID: 34459311 DOI: 10.1080/10408398.2021.1969889] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The fundamental basis for the human function is provided by skeletal muscle. Advancing age causes selective fiber atrophy, motor unit loss, and hybrid fiber formation resulting in hampered mass and strength, thus referred to as sarcopenia. Influence on the loss of independence of aged adults, contribute toward inclined healthcare costs conveys the injurious impact. The current understating of age-related skeletal muscle changes are addressed in this review, and further discusses mechanisms regulating protein turnover, although they do not completely define the process yet. Moreover, the reduced capacity of muscle regeneration due to impairment of satellite cell activation and proliferation with neuronal, immunological, hormonal factors were brought into the light of attention. Nevertheless, complete understating of sarcopenia requires disentangling it from disuse and disease. Nutritional intervention is considered a potentially preventable factor contributing to sarcopenia. Seafood is a crucial player in the fight against hunger and malnutrition, where it consists of macro and micronutrients. Hence, the review shed light on seafood as a nutritional intrusion in the treatment and prevention of sarcopenia. Understanding multiple factors will provide therapeutic targets in the prevention, treatment, and overcoming adverse effects of sarcopenia.
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Affiliation(s)
- Thilina U Jayawardena
- Department of Marine Life Sciences, Jeju National University, Jeju, Republic of Korea
| | - Seo-Young Kim
- Division of Practical Application, Honam National Institute of Biological Resources, Mokpo-si, Korea
| | - You-Jin Jeon
- Department of Marine Life Sciences, Jeju National University, Jeju, Republic of Korea.,Marine Science Institute, Jeju National University, Jeju, Jeju Self-Governing Province, Republic of Korea
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4
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Karamanos NK, Piperigkou Z, Theocharis AD, Watanabe H, Franchi M, Baud S, Brézillon S, Götte M, Passi A, Vigetti D, Ricard-Blum S, Sanderson RD, Neill T, Iozzo RV. Proteoglycan Chemical Diversity Drives Multifunctional Cell Regulation and Therapeutics. Chem Rev 2018; 118:9152-9232. [DOI: 10.1021/acs.chemrev.8b00354] [Citation(s) in RCA: 193] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Nikos K. Karamanos
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras 26110, Greece
- Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Patras 26110, Greece
| | - Zoi Piperigkou
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras 26110, Greece
- Foundation for Research and Technology-Hellas (FORTH)/Institute of Chemical Engineering Sciences (ICE-HT), Patras 26110, Greece
| | - Achilleas D. Theocharis
- Biochemistry, Biochemical Analysis & Matrix Pathobiology Research Group, Laboratory of Biochemistry, Department of Chemistry, University of Patras, Patras 26110, Greece
| | - Hideto Watanabe
- Institute for Molecular Science of Medicine, Aichi Medical University, Aichi 480-1195, Japan
| | - Marco Franchi
- Department for Life Quality Studies, University of Bologna, Rimini 47100, Italy
| | - Stéphanie Baud
- Université de Reims Champagne-Ardenne, Laboratoire SiRMa, CNRS UMR MEDyC 7369, Faculté de Médecine, 51 rue Cognacq Jay, Reims 51100, France
| | - Stéphane Brézillon
- Université de Reims Champagne-Ardenne, Laboratoire de Biochimie Médicale et Biologie Moléculaire, CNRS UMR MEDyC 7369, Faculté de Médecine, 51 rue Cognacq Jay, Reims 51100, France
| | - Martin Götte
- Department of Gynecology and Obstetrics, Münster University Hospital, Münster 48149, Germany
| | - Alberto Passi
- Department of Medicine and Surgery, University of Insubria, Varese 21100, Italy
| | - Davide Vigetti
- Department of Medicine and Surgery, University of Insubria, Varese 21100, Italy
| | - Sylvie Ricard-Blum
- University Claude Bernard Lyon 1, CNRS, UMR 5246, Institute of Molecular and Supramolecular Chemistry and Biochemistry, Villeurbanne 69622, France
| | - Ralph D. Sanderson
- Department of Pathology, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
| | - Thomas Neill
- Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania 10107, United States
| | - Renato V. Iozzo
- Department of Pathology, Anatomy and Cell Biology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania 10107, United States
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5
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Song C, Wang J, Ma Y, Yang Z, Dong D, Li H, Yang J, Huang Y, Plath M, Ma Y, Chen H. Linc-smad7 promotes myoblast differentiation and muscle regeneration via sponging miR-125b. Epigenetics 2018; 13:591-604. [PMID: 29912619 DOI: 10.1080/15592294.2018.1481705] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Long noncoding RNAs (lncRNAs) are involved in the regulation of skeletal muscle development. In the present study, differentially expressed lncRNAs were identified from RNA-seq data derived from myoblasts and myotubes. We conducted studies to elucidate the function and molecular mechanism of action of Linc-smad7 during skeletal muscle development. Our findings show that Linc-smad7 is upregulated during the early phase of myoblasts differentiation. In in vitro studies, we showed that overexpression of Linc-smad7 promoted the arrest of myoblasts in G1 phase, inhibited DNA replication, and induced myoblast differentiation. Our in vivo studies suggest that Linc-smad7 stimulates skeletal muscle regeneration in cardiotoxin-induced muscle injury. Mechanistically, Linc-smad7 overexpression increased smad7 and IGF2 protein levels. On the contrary, overexpression of miR-125b reduced smad7 and IGF2 protein levels. Results of RNA immunoprecipitation analysis and biotin-labeled miR-125b capture suggest that Linc-smad7 could act as a competing endogenous RNA (ceRNA) for miRNA-125b. Taken together, our findings suggest that the novel noncoding regulator Linc-smad7 regulates skeletal muscle development.
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Affiliation(s)
- Chengchuang Song
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Jian Wang
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Yilei Ma
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Zhaoxin Yang
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Dong Dong
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Hui Li
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Jiameng Yang
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Yongzhen Huang
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Martin Plath
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
| | - Yun Ma
- b Xinyang Normal University , Xinyang , Henan , China
| | - Hong Chen
- a College of Animal Science and Technology , Northwest A&F University, Shaanxi Key Laboratory of Molecular Biology for Agriculture , Yangling , Shaanxi , China
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6
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Scicchitano BM, Dobrowolny G, Sica G, Musarò A. Molecular Insights into Muscle Homeostasis, Atrophy and Wasting. Curr Genomics 2018; 19:356-369. [PMID: 30065611 PMCID: PMC6030854 DOI: 10.2174/1389202919666180101153911] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Muscle homeostasis is guaranteed by a delicate balance between synthesis and degradation of cell proteins and its alteration leads to muscle wasting and diseases. In this review, we describe the major anabolic pathways that are involved in muscle growth and homeostasis and the proteolytic systems that are over-activated in muscle pathologies. Modulation of these pathways comprises an attractive target for drug intervention.
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Affiliation(s)
- Bianca Maria Scicchitano
- Istituto di Istologia e Embriologia, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario Agostino Gemelli, Largo Francesco Vito 1-00168, Roma, Italy
| | - Gabriella Dobrowolny
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome, Italy
| | - Gigliola Sica
- Istituto di Istologia e Embriologia, Università Cattolica del Sacro Cuore, Fondazione Policlinico Universitario Agostino Gemelli, Largo Francesco Vito 1-00168, Roma, Italy
| | - Antonio Musarò
- Center for Life Nano Science@Sapienza, Istituto Italiano di Tecnologia, Rome, Italy
- DAHFMO-Unit of Histology and Medical Embryology, Sapienza University of Rome, Laboratory Affiliated to Istituto Pasteur Italia - Fondazione Cenci Bolognetti, Rome, Italy
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7
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Li Q, Yoshimura H, Komiya M, Tajiri K, Uesugi M, Hata Y, Ozawa T. A robust split-luciferase-based cell fusion screening for discovering myogenesis-promoting molecules. Analyst 2018; 143:3472-3480. [DOI: 10.1039/c8an00285a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Screening by the luciferase complementation-based cell fusion assay discovered two myogenesis-promoting chemicals.
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Affiliation(s)
- Qiaojing Li
- Department of Chemistry
- School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Hideaki Yoshimura
- Department of Chemistry
- School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Maki Komiya
- Department of Chemistry
- School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
| | - Ken Tajiri
- Institute for Integrated Cell-Material Sciences (iCeMS)/Institute for Chemical Research (ICR)
- Kyoto University
- Kyoto 611-0011
- Japan
| | - Motonari Uesugi
- Institute for Integrated Cell-Material Sciences (iCeMS)/Institute for Chemical Research (ICR)
- Kyoto University
- Kyoto 611-0011
- Japan
| | - Yutaka Hata
- Graduate School of Medical and Dental Sciences
- Tokyo Medical and Dental University
- Tokyo 113-8510
- Japan
| | - Takeaki Ozawa
- Department of Chemistry
- School of Science
- The University of Tokyo
- Tokyo 113-0033
- Japan
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8
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Mashinchian O, Pisconti A, Le Moal E, Bentzinger CF. The Muscle Stem Cell Niche in Health and Disease. Curr Top Dev Biol 2017; 126:23-65. [PMID: 29305000 DOI: 10.1016/bs.ctdb.2017.08.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
The regulation of stem cells that maintain and regenerate postnatal tissues depends on extrinsic signals originating from their microenvironment, commonly referred to as the stem cell niche. Complex higher-order regulatory interrelationships with the tissue and factors in the systemic circulation are integrated and propagated to the stem cells through the niche. The stem cell niche in skeletal muscle tissue is both a paradigm for a structurally and functionally relatively static niche that maintains stem cell quiescence during tissue homeostasis, and a highly dynamic regenerative niche that is subject to extensive structural remodeling and a flux of different support cell populations. Conditions ranging from aging to chronically degenerative skeletal muscle diseases affect the composition of the niche and thereby impair the regenerative potential of muscle stem cells. A holistic and integrative understanding of the extrinsic mechanisms regulating muscle stem cells in health and disease in a broad systemic context will be imperative for the identification of regulatory hubs in the niche interactome that can be targeted to maintain, restore, or enhance the regenerative capacity of muscle tissue. Here, we review the microenvironmental regulation of muscle stem cells, summarize how niche dysfunction can contribute to disease, and discuss emerging therapeutic implications.
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Affiliation(s)
- Omid Mashinchian
- Nestlé Institute of Health Sciences, Lausanne, Switzerland; École Polytechnique Fédérale de Lausanne, Doctoral Program in Biotechnology and Bioengineering, Lausanne, Switzerland
| | - Addolorata Pisconti
- Institute of Integrative Biology, University of Liverpool, Liverpool, United Kingdom
| | - Emmeran Le Moal
- Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - C Florian Bentzinger
- Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke, QC, Canada.
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9
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Malinverno M, Corada M, Ferrarini L, Formicola L, Marazzi G, Sassoon D, Dejana E. Peg3/PW1 Is a Marker of a Subset of Vessel Associated Endothelial Progenitors. Stem Cells 2017; 35:1328-1340. [PMID: 28090691 DOI: 10.1002/stem.2566] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 11/30/2016] [Accepted: 12/12/2016] [Indexed: 12/16/2022]
Abstract
Vascular associated endothelial cell (ECs) progenitors are still poorly studied and their role in the newly forming vasculature at embryonic or postnatal stage remains elusive. In the present work, we first defined a set of genes highly expressed during embryo development and strongly downregulated in the adult mouse. In this group, we then concentrated on the progenitor cell marker Peg3/PW1. By in vivo staining of the vasculature we found that only a subset of cells coexpressed endothelial markers and PW1. These cells were quite abundant in the embryo vasculature but declined in number at postnatal and adult stages. Using a reporter mouse for PW1 expression, we have been able to isolate PW1-positive (PW1posECs) and negative endothelial cells (PW1negECs). PW1-positive cells were highly proliferative in comparison to PW1negECs and were able to form colonies when seeded at clonal dilution. Furthermore, by RNAseq analysis, PW1posECs expressed endothelial cell markers together with mesenchymal and stem cell markers. When challenged by endothelial growth factors in vitro, PW1posECs were able to proliferate more than PW1negECs and to efficiently form new vessels in vivo. Taken together these data identify a subset of vessel associated endothelial cells with characteristics of progenitor cells. Considering their high proliferative potential these cells may be of particular importance to design therapies to improve the perfusion of ischemic tissues or to promote vascular repair. Stem Cells 2017;35:1328-1340.
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Affiliation(s)
- Matteo Malinverno
- FIRC Institute of Molecular Oncology (IFOM) Fondazione, Milan, Italy
| | - Monica Corada
- FIRC Institute of Molecular Oncology (IFOM) Fondazione, Milan, Italy
| | - Luca Ferrarini
- FIRC Institute of Molecular Oncology (IFOM) Fondazione, Milan, Italy
| | - Luigi Formicola
- Stem Cells and Regenerative Medicine, Institute of Cardiometabolism and Nutrition (ICAN) UMRS 1166 Université de Pierre et Marie Curie-Sorbonne Universités and INSERM, Paris, France
| | - Giovanna Marazzi
- Stem Cells and Regenerative Medicine, Institute of Cardiometabolism and Nutrition (ICAN) UMRS 1166 Université de Pierre et Marie Curie-Sorbonne Universités and INSERM, Paris, France
| | - David Sassoon
- Stem Cells and Regenerative Medicine, Institute of Cardiometabolism and Nutrition (ICAN) UMRS 1166 Université de Pierre et Marie Curie-Sorbonne Universités and INSERM, Paris, France
| | - Elisabetta Dejana
- FIRC Institute of Molecular Oncology (IFOM) Fondazione, Milan, Italy.,Department of Biosciences, School of Sciences and Department of Oncology, School of Medicine, Milan University, Milan, Italy.,Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
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10
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Tonlorenzi R, Rossi G, Messina G. Isolation and Characterization of Vessel-Associated Stem/Progenitor Cells from Skeletal Muscle. Methods Mol Biol 2017; 1556:149-177. [PMID: 28247349 DOI: 10.1007/978-1-4939-6771-1_8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
More than 10 years ago, we isolated from mouse embryonic dorsal aorta a population of vessel-associated stem/progenitor cells, originally named mesoangioblasts (MABs ) , capable to differentiate in all mesodermal-derived tissues, including skeletal muscle. Similar though not identical cells have been later isolated and characterized from small vessels of adult mouse and human skeletal muscles. When delivered through the arterial circulation, MABs cross the blood vessel wall and participate in skeletal muscle regeneration , leading to an amelioration of muscular dystrophies in different preclinical animal models. As such, human MABs have been used under clinical-grade conditions for a Phase I/II clinical trial for Duchenne muscular dystrophy , just concluded. Although some pericyte markers can be used to identify mouse and human MABs , no single unequivocal marker can be used to isolate MABs . As a result, MABs are mainly defined by their isolation method and functional properties. This chapter provides detailed methods for isolation, culture, and characterization of MABs in light of the recent identification of a new marker, PW1 /Peg3, to screen and identify competent MABs before their use in cell therapy.
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Affiliation(s)
- Rossana Tonlorenzi
- INSPE (Institute of Experimental Neurology) San Raffaele Scientific Institute, Via Olgettina 60, 20132, Milano, Italy
| | - Giuliana Rossi
- Department of Biosciences, University of Milan, Via Celoria 26, 20133, Milan, Italy
| | - Graziella Messina
- Department of Biosciences, University of Milan, Via Celoria 26, 20133, Milan, Italy.
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11
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Besson V, Kyryachenko S, Janich P, Benitah SA, Marazzi G, Sassoon D. Expression Analysis of the Stem Cell Marker Pw1/Peg3 Reveals a CD34 Negative Progenitor Population in the Hair Follicle. Stem Cells 2016; 35:1015-1027. [PMID: 27862634 DOI: 10.1002/stem.2540] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 09/10/2016] [Accepted: 10/16/2016] [Indexed: 12/30/2022]
Abstract
Pw1/Peg3 is a parentally imprinted gene expressed in adult stem cells in every tissue thus far examined including the stem cells of the hair follicle. Using a Pw1/Peg3 reporter mouse, we carried out a detailed dissection of the stem cells in the bulge, which is a major stem cell compartment of the hair follicle in mammalian skin. We observed that PW1/Peg3 expression initiates upon placode formation during fetal development, coincident with the establishment of the bulge stem cells. In the adult, we observed that PW1/Peg3 expression is found in both CD34+ and CD34- populations of bulge stem cells. We demonstrate that both populations can give rise to new hair follicles, reconstitute their niche, and self-renew. These results demonstrate that PW1/Peg3 is a reliable marker of the full population of follicle stem cells and reveal a novel CD34- bulge stem-cell population. Stem Cells 2017;35:1015-1027.
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Affiliation(s)
- Vanessa Besson
- Stem Cells and Regenerative Medicine, Institute of Cardiometabolism and Nutrition (ICAN), UMRS 1166 INSERM, University of Pierre and Marie Curie Paris VI, Paris, France
| | - Sergiy Kyryachenko
- Stem Cells and Regenerative Medicine, Institute of Cardiometabolism and Nutrition (ICAN), UMRS 1166 INSERM, University of Pierre and Marie Curie Paris VI, Paris, France
| | - Peggy Janich
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain
| | - Salvador A Benitah
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Barcelona, Spain.,ICREA, Catalan Institution for Research and Advanced Studies, Barcelona, Spain.,Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
| | - Giovanna Marazzi
- Stem Cells and Regenerative Medicine, Institute of Cardiometabolism and Nutrition (ICAN), UMRS 1166 INSERM, University of Pierre and Marie Curie Paris VI, Paris, France
| | - David Sassoon
- Stem Cells and Regenerative Medicine, Institute of Cardiometabolism and Nutrition (ICAN), UMRS 1166 INSERM, University of Pierre and Marie Curie Paris VI, Paris, France
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12
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Abstract
Muscle loss accompanies severe burn; in this hyper-catabolic state, muscle undergoes atrophy through protein degradation and disuse. Muscle volume is related to the relative rates of cellular degradation and myogenesis. We hypothesize that muscle atrophy after injury is in part because of insufficient myogenesis associated with the hyper-inflammatory response. The aim of this study was to investigate the role of skeletal myogenesis and muscle cell homeostasis in response to severe burn. Twenty-eight male C57BL6 mice received 25% TBSA scald. Gluteus muscle from these animals was analyzed at days 1, 3, 7, and 14 after injury. Six additional animals without burn served as controls. We showed muscle wet weight and protein content decreased at days 3 and 7 after burn, with elevated tumor necrosis factor (TNF) mRNA expression (P < 0.05). Increased cell death was observed through TUNEL staining, and cleaved caspase-3 levels reached a peak in muscle lysate at day 3 (P < 0.05). The cell proliferation marker proliferating cell nuclear antigen (PCNA) significantly increased after burn, associated with increased gene and protein expression of myogenesis markers Pax7 and myogenin. Desmin mRNA expression and the ratio of desmin to PCNA protein expression, however, significantly decreased at day 7 (P < 0.05). In vitro, the ratio of desmin to PCNA protein expression significantly decreased in C2C12 murine myoblasts after TNF-α stimulation for 24 h. We showed that severe burn induces both increased cell death and proliferation. Myogenesis, however, does not counterbalance increased cell death after burn. Data suggest insufficient myogenesis might be associated with pro-inflammatory mediator TNF activity.
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13
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Iwata Y, Suzuki N, Ohtake H, Kamauchi S, Hashimoto N, Kiyono T, Wakabayashi S. Cancer cachexia causes skeletal muscle damage via transient receptor potential vanilloid 2-independent mechanisms, unlike muscular dystrophy. J Cachexia Sarcopenia Muscle 2016; 7:366-76. [PMID: 27239414 PMCID: PMC4864294 DOI: 10.1002/jcsm.12067] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Revised: 06/05/2015] [Accepted: 07/28/2015] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Muscle wasting during cancer cachexia contributes to patient morbidity. Cachexia-induced muscle damage may be understood by comparing its symptoms with those of other skeletal muscle diseases, but currently available data are limited. METHODS We modelled cancer cachexia in mice bearing Lewis lung carcinoma/colon adenocarcinoma and compared the associated muscle damage with that in a murine muscular dystrophy model (mdx mice). We measured biochemical and immunochemical parameters: amounts/localization of cytoskeletal proteins and/or Ca(2+) signalling proteins related to muscle function and abnormality. We analysed intracellular Ca(2+) mobilization and compared results between the two models. Involvement of Ca(2+)-permeable channel transient receptor potential vanilloid 2 (TRPV2) was examined by inoculating Lewis lung carcinoma cells into transgenic mice expressing dominant-negative TRPV2. RESULTS Tumourigenesis caused loss of body and skeletal muscle weight and reduced muscle force and locomotor activity. Similar to mdx mice, cachexia muscles exhibited myolysis, reduced sarcolemmal sialic acid content, and enhanced lysosomal exocytosis and sarcolemmal localization of phosphorylated Ca(2+)/CaMKII. Abnormal autophagy and degradation of dystrophin also occurred. Unlike mdx muscles, cachexia muscles did not exhibit regeneration markers (centrally nucleated fibres), and levels of autophagic proteolytic pathway markers increased. While a slight accumulation of TRPV2 was observed in cachexia muscles, Ca(2+) influx via TRPV2 was not elevated in cachexia-associated myotubes, and the course of cachexia pathology was not ameliorated by dominant-negative inhibition of TRPV2. CONCLUSIONS Thus, cancer cachexia may induce muscle damage through TRPV2-independent mechanisms distinct from those in muscular dystrophy; this may help treat patients with tumour-induced muscle wasting.
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Affiliation(s)
- Yuko Iwata
- Department of Molecular Physiology National Cerebral and Cardiovascular Center Research Institute Suita Osaka 565-8565 Japan
| | | | - Hitomi Ohtake
- Department of Molecular Physiology National Cerebral and Cardiovascular Center Research Institute Suita Osaka 565-8565 Japan
| | - Shinya Kamauchi
- Department of Molecular Physiology National Cerebral and Cardiovascular Center Research Institute Suita Osaka 565-8565 Japan
| | - Naohiro Hashimoto
- Department of Regenerative Medicine, National Institute for Longevity Science National Center for Geriatrics and Gerontology Oobu Aichi 474-8522 Japan
| | - Tohru Kiyono
- Viology Division National Cancer Center Research Institute Chuo-ku Tokyo 104-0045 Japan
| | - Shigeo Wakabayashi
- Department of Molecular Physiology National Cerebral and Cardiovascular Center Research Institute Suita Osaka 565-8565 Japan
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14
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Neill T, Schaefer L, Iozzo RV. Decorin as a multivalent therapeutic agent against cancer. Adv Drug Deliv Rev 2016; 97:174-85. [PMID: 26522384 DOI: 10.1016/j.addr.2015.10.016] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 10/20/2015] [Accepted: 10/23/2015] [Indexed: 12/22/2022]
Abstract
Decorin is a prototypical small leucine-rich proteoglycan that epitomizes the multifunctional nature of this critical gene family. Soluble decorin engages multiple receptor tyrosine kinases within the target-rich environment of the tumor stroma and tumor parenchyma. Upon receptor binding, decorin initiates signaling pathways within endothelial cells downstream of VEGFR2 that ultimately culminate in a Peg3/Beclin 1/LC3-dependent autophagic program. Concomitant with autophagic induction, decorin blunts capillary morphogenesis and endothelial cell migration, thereby significantly compromising tumor angiogenesis. In parallel within the tumor proper, decorin binds multiple RTKs with high affinity, including Met, for a multitude of oncosuppressive functions including growth inhibition, tumor cell mitophagy, and angiostasis. Decorin is also pro-inflammatory by modulating macrophage function and cytokine secretion. Decorin suppresses tumorigenic growth, angiogenesis, and prevents metastatic lesions in a variety of in vitro and in vivo tumor models. Therefore, decorin would be an ideal therapeutic candidate for combating solid malignancies.
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15
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Talbert EE, Guttridge DC. Impaired regeneration: A role for the muscle microenvironment in cancer cachexia. Semin Cell Dev Biol 2015; 54:82-91. [PMID: 26385617 DOI: 10.1016/j.semcdb.2015.09.009] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2015] [Accepted: 09/11/2015] [Indexed: 12/17/2022]
Abstract
While changes in muscle protein synthesis and degradation have long been known to contribute to muscle wasting, a body of literature has arisen which suggests that regulation of the satellite cell and its ensuing regenerative program are impaired in atrophied muscle. Lessons learned from cancer cachexia suggest that this regulation is simply not a consequence, but a contributing factor to the wasting process. In addition to satellite cells, evidence from mouse models of cancer cachexia also suggests that non-satellite progenitor cells from the muscle microenvironment are also involved. This chapter in the series reviews the evidence of dysfunctional muscle repair in multiple wasting conditions. Potential mechanisms for this dysfunctional regeneration are discussed, particularly in the context of cancer cachexia.
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Affiliation(s)
- Erin E Talbert
- Department of Molecular Virology, Immunology, and Medical Genetics, Human Cancer Genetics Program, and the Arthur G. James Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA
| | - Denis C Guttridge
- Department of Molecular Virology, Immunology, and Medical Genetics, Human Cancer Genetics Program, and the Arthur G. James Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210, USA.
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16
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PW1/Peg3 expression regulates key properties that determine mesoangioblast stem cell competence. Nat Commun 2015; 6:6364. [PMID: 25751651 PMCID: PMC4366533 DOI: 10.1038/ncomms7364] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 01/22/2015] [Indexed: 12/14/2022] Open
Abstract
Mesoangioblasts are vessel-associated progenitor cells that show therapeutic promise for the treatment of muscular dystrophy. Mesoangioblasts have the ability to undergo skeletal muscle differentiation and cross the blood vessel wall regardless of the developmental stage at which they are isolated. Here we show that PW1/Peg3 is expressed at high levels in mesoangioblasts obtained from mouse, dog and human tissues and its level of expression correlates with their myogenic competence. Silencing PW1/Peg3 markedly inhibits myogenic potential of mesoangioblasts in vitro through MyoD degradation. Moreover, lack of PW1/Peg3 abrogates mesoangioblast ability to cross the vessel wall and to engraft into damaged myofibres through the modulation of the junctional adhesion molecule-A. We conclude that PW1/Peg3 function is essential for conferring proper mesoangioblast competence and that the determination of PW1/Peg3 levels in human mesoangioblasts may serve as a biomarker to identify the best donor populations for therapeutic application in muscular dystrophies. Mesoangioblasts are mesodermal stem cells with a therapeutic potential for treatment of muscular dystrophy due to their ability to differentiate into skeletal muscle. This study shows that the PW1/Peg3 protein is crucial for mesoangioblast myogenic and migratory potency and is a therapeutically relevant biomarker.
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17
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Zhao Q, Yang ST, Wang JJ, Zhou J, Xing SS, Shen CC, Wang XX, Yue YX, Song J, Chen M, Wei YY, Zhou QP, Dai T, Song YH. TNF alpha inhibits myogenic differentiation of C2C12 cells through NF-κB activation and impairment of IGF-1 signaling pathway. Biochem Biophys Res Commun 2015; 458:790-5. [PMID: 25686491 DOI: 10.1016/j.bbrc.2015.02.026] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 02/05/2015] [Indexed: 01/07/2023]
Abstract
Cachexia or muscle wasting is a common condition that occurs in many chronic diseases. The wasting conditions are characterized by increased levels of TNF-α which was also known as cachectin in the past. But how TNF-α exerts its cachetic effects remains controversial. To clarify this issue, we investigated the impact of TNF-α on C2C12 cell myogenic differentiation. Our results demonstrate that myotube formation was completely inhibited by TNF-α when added to differentiating C2C12 myoblasts. The inhibitory effect of TNF-α on differentiation was accompanied by activation of NF-κB and down regulation of myogenin and Akt. Importantly, TNF-α's effect on differentiation was abolished when IGF-1 was added to the culture. IGF-1 treatment also inhibited NF-κB reporter activity and restored Akt levels. Our data suggest that TNF-α inhibits myogenic differentiation through NF-κB activation and impairment of IGF-1 signaling pathway. The reversal of TNF-α induced inhibition of myogenesis by IGF-1 may have significant therapeutic potential.
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Affiliation(s)
- Q Zhao
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - S T Yang
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - J J Wang
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China; The Affiliated Wuxi Hospital for Maternal and Child Health Care of Medical University of Nanjing, Wuxi, Jiangsu Province, China
| | - J Zhou
- Department of Surgery, First Affiliated Hospital, Soochow University, Suzhou, China
| | - S S Xing
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - C C Shen
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - X X Wang
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Y X Yue
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - J Song
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - M Chen
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Y Y Wei
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Q P Zhou
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - T Dai
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Y H Song
- Cyrus Tang Hematology Center, Jiangsu Institute of Hematology, First Affiliated Hospital, Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.
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18
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Ostrovidov S, Hosseini V, Ahadian S, Fujie T, Parthiban SP, Ramalingam M, Bae H, Kaji H, Khademhosseini A. Skeletal muscle tissue engineering: methods to form skeletal myotubes and their applications. TISSUE ENGINEERING. PART B, REVIEWS 2014; 20:403-36. [PMID: 24320971 PMCID: PMC4193686 DOI: 10.1089/ten.teb.2013.0534] [Citation(s) in RCA: 163] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Accepted: 12/05/2013] [Indexed: 12/25/2022]
Abstract
Skeletal muscle tissue engineering (SMTE) aims to repair or regenerate defective skeletal muscle tissue lost by traumatic injury, tumor ablation, or muscular disease. However, two decades after the introduction of SMTE, the engineering of functional skeletal muscle in the laboratory still remains a great challenge, and numerous techniques for growing functional muscle tissues are constantly being developed. This article reviews the recent findings regarding the methodology and various technical aspects of SMTE, including cell alignment and differentiation. We describe the structure and organization of muscle and discuss the methods for myoblast alignment cultured in vitro. To better understand muscle formation and to enhance the engineering of skeletal muscle, we also address the molecular basics of myogenesis and discuss different methods to induce myoblast differentiation into myotubes. We then provide an overview of different coculture systems involving skeletal muscle cells, and highlight major applications of engineered skeletal muscle tissues. Finally, potential challenges and future research directions for SMTE are outlined.
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Affiliation(s)
- Serge Ostrovidov
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Vahid Hosseini
- Laboratory of Applied Mechanobiology, Department of Health Sciences and Technology, ETH, Zurich, Switzerland
| | - Samad Ahadian
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Toshinori Fujie
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
- Department of Life Science and Medical Bioscience, Graduate School of Advanced Science and Engineering, Waseda University, Tokyo, Japan
| | | | - Murugan Ramalingam
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
- Faculté de Chirurgie Dentaire, Université de Strasbourg, Strasbourg Cedex, France
- Centre for Stem Cell Research, Christian Medical College Campus, Vellore, India
| | - Hojae Bae
- College of Animal Bioscience and Technology, Department of Bioindustrial Technologies, Konkuk University, Hwayang-dong, Kwangjin-gu, Seoul, Republic of Korea
| | - Hirokazu Kaji
- Department of Bioengineering and Robotics, Graduate School of Engineering, Tohoku University, Sendai, Japan
| | - Ali Khademhosseini
- WPI-Advanced Institute for Materials Research, Tohoku University, Sendai, Japan
- Department of Maxillofacial Biomedical Engineering, Institute of Oral Biology, School of Dentistry, Kyung Hee University, Seoul, Republic of Korea
- Center for Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, Massachusetts, United States
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts, United States
- Department of Physics, King Abdulaziz University, Jeddah, Saudi Arabia
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19
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IL-6 impairs myogenic differentiation by downmodulation of p90RSK/eEF2 and mTOR/p70S6K axes, without affecting AKT activity. BIOMED RESEARCH INTERNATIONAL 2014; 2014:206026. [PMID: 24967341 PMCID: PMC4055274 DOI: 10.1155/2014/206026] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/02/2014] [Indexed: 12/15/2022]
Abstract
IL-6 is a multifaceted pleiotropic cytokine, which is produced by a variety of cell types and targets different cells and tissues.
In physiological conditions, IL-6 can be locally and transiently produced by skeletal muscle and plays an important role in muscle homeostasis.
Circulating IL-6 levels are normally very low or undetectable but are dramatically increased in several pathologic conditions.
In this study, we aimed to define the potential molecular mechanisms underlying the effects of IL-6 on myogenic program.
We explored the molecular mechanisms through which exogenous IL-6,
or the conditioned medium from the murine C-26 adenocarcinoma cells (a cellular model that secretes high levels of IL-6 and induces cancer cachexia in mice),
interferes with the myogenic program.
Our study revealed that IL-6 induces the activation of the Stat3 signaling and promotes the downmodulation of the p90RSK/eEF2 and mTOR/p70S6K axes,
while it does not affect the activation of AKT. We thus identified potential molecular mediators of the inhibitory effects of IL-6 on myogenic program.
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20
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Inflammation based regulation of cancer cachexia. BIOMED RESEARCH INTERNATIONAL 2014; 2014:168407. [PMID: 24877061 PMCID: PMC4022077 DOI: 10.1155/2014/168407] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 04/10/2014] [Indexed: 02/08/2023]
Abstract
Cancer cachexia, consisting of significant skeletal muscle wasting independent of nutritional intake, is a major concern for patients with solid tumors that affects surgical, therapeutic, and quality of life outcomes. This review summarizes the clinical implications, background of inflammatory cytokines, and the origin and sources of procachectic factors including TNF-α, IL-6, IL-1, INF-γ, and PIF. Molecular mechanisms and pathways are described to elucidate the link between the immune response caused by the presence of the tumor and the final result of skeletal muscle wasting.
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21
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Fukada SI, Ma Y, Ohtani T, Watanabe Y, Murakami S, Yamaguchi M. Isolation, characterization, and molecular regulation of muscle stem cells. Front Physiol 2013; 4:317. [PMID: 24273513 PMCID: PMC3824104 DOI: 10.3389/fphys.2013.00317] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 10/14/2013] [Indexed: 12/15/2022] Open
Abstract
Skeletal muscle has great regenerative capacity which is dependent on muscle stem cells, also known as satellite cells. A loss of satellite cells and/or their function impairs skeletal muscle regeneration and leads to a loss of skeletal muscle power; therefore, the molecular mechanisms for maintaining satellite cells in a quiescent and undifferentiated state are of great interest in skeletal muscle biology. Many studies have demonstrated proteins expressed by satellite cells, including Pax7, M-cadherin, Cxcr4, syndecan3/4, and c-met. To further characterize satellite cells, we established a method to directly isolate satellite cells using a monoclonal antibody, SM/C-2.6. Using SM/C-2.6 and microarrays, we measured the genes expressed in quiescent satellite cells and demonstrated that Hesr3 may complement Hesr1 in generating quiescent satellite cells. Although Hesr1- or Hesr3-single knockout mice show a normal skeletal muscle phenotype, including satellite cells, Hesr1/Hesr3-double knockout mice show a gradual decrease in the number of satellite cells and increase in regenerative defects dependent on satellite cell numbers. We also observed that a mouse's genetic background affects the regenerative capacity of its skeletal muscle and have established a line of DBA/2-background mdx mice that has a much more severe phenotype than the frequently used C57BL/10-mdx mice. The phenotype of DBA/2-mdx mice also seems to depend on the function of satellite cells. In this review, we summarize the methodology of direct isolation, characterization, and molecular regulation of satellite cells based on our results. The relationship between the regenerative capacity of satellite cells and progression of muscular disorders is also summarized. In the last part, we discuss application of the accumulating scientific information on satellite cells to treatment of patients with muscular disorders.
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Affiliation(s)
- So-Ichiro Fukada
- Laboratory of Molecular and Cellular Physiology, Graduate School of Pharmaceutical Sciences, Osaka University Osaka, Japan
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22
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Pannérec A, Formicola L, Besson V, Marazzi G, Sassoon DA. Defining skeletal muscle resident progenitors and their cell fate potentials. Development 2013; 140:2879-91. [PMID: 23739133 DOI: 10.1242/dev.089326] [Citation(s) in RCA: 107] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The satellite cell is the major tissue-resident stem cell underlying muscle regeneration; however, multiple non-satellite myogenic progenitors as well as non-myogenic populations that support the muscle regenerative process have been identified. PW1 is expressed in satellite cells as well as in a subset of interstitial cells with myogenic potential termed PICs (PW1+ interstitial cells). Microarray profiling revealed that PICs express a broad range of genes common to mesenchymal stem cells, whereas satellite cells express genes consistent with a committed myogenic progenitor. Isolated PICs from both young and adult muscles can differentiate into smooth and skeletal muscle and fat whereas satellite cells are restricted to a skeletal muscle fate. We demonstrate that the adipogenic potential of PICs corresponds to a subpopulation that expresses platelet derived growth factor receptor alpha (PDGFRα) and overlaps with the recently described interstitial adipogenic progenitors. By contrast, PICs with myogenic potential do not express PDGFRα. Moreover, we observe a discrete and transient population of juvenile PICs based upon SCA1 expression that disappears by 3 weeks of postnatal development coincident with a switch in the cellular and genetic mechanisms underlying postnatal muscle growth.
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Affiliation(s)
- Alice Pannérec
- Myology Group, UMR S 787 INSERM, University of Pierre and Marie Curie Paris VI, Paris 75634, France
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23
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Sirabella D, De Angelis L, Berghella L. Sources for skeletal muscle repair: from satellite cells to reprogramming. J Cachexia Sarcopenia Muscle 2013; 4:125-36. [PMID: 23314905 PMCID: PMC3684700 DOI: 10.1007/s13539-012-0098-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 11/28/2012] [Indexed: 02/07/2023] Open
Abstract
Skeletal muscle regeneration is the process that ensures tissue repair after damage by injury or in degenerative diseases such as muscular dystrophy. Satellite cells, the adult skeletal muscle progenitor cells, are commonly considered to be the main cell type involved in skeletal muscle regeneration. Their mechanism of action in this process is extensively characterized. However, evidence accumulated in the last decade suggests that other cell types may participate in skeletal muscle regeneration. Although their actual contribution to muscle formation and regeneration is still not clear; if properly manipulated, these cells may become new suitable and powerful sources for cell therapy of skeletal muscle degenerative diseases. Mesoangioblasts, vessel associated stem/progenitor cells with high proliferative, migratory and myogenic potential, are very good candidates for clinical applications and are already in clinical experimentation. In addition, pluripotent stem cells are very promising sources for regeneration of most tissues, including skeletal muscle. Conditions such as muscle cachexia or aging that severely alter homeostasis may be counteracted by transplantation of donor and/or recruitment and activation of resident muscle stem/progenitor cells. Advantages and limitations of different cell therapy approaches will be discussed.
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Affiliation(s)
- Dario Sirabella
- />Department of Biomedical Engineering, Columbia University, 2920 Broadway, New York, NY 10027-7164 USA
| | - Luciana De Angelis
- />DAHFMO, Unit of Histology and Medical Embryology, University of Roma “La Sapienza”, Via Scarpa, 14, 00161 Rome, Italy
| | - Libera Berghella
- />IRCCS Fondazione S. Lucia, Via del Fosso di Fiorano, 64, 00143 Rome, Italy
- />HudsonAlpha Institute for Biotechnology, 601 Genome Way, Huntsville, AL 35806 USA
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24
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Motohashi N, Alexander MS, Shimizu-Motohashi Y, Myers JA, Kawahara G, Kunkel LM. Regulation of IRS1/Akt insulin signaling by microRNA-128a during myogenesis. J Cell Sci 2013; 126:2678-91. [PMID: 23606743 DOI: 10.1242/jcs.119966] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Skeletal muscle possesses a strong ability to regenerate following injury, a fact that has been largely attributed to satellite cells. Satellite cells are skeletal muscle stem cells located beneath the basal lamina of the myofiber, and are the principal cellular source of growth and regeneration in skeletal muscle. MicroRNAs (miRNAs) play key roles in modulating several cellular processes by targeting multiple mRNAs that comprise a single or multiple signaling pathway. Several miRNAs have been shown to regulate satellite cell activity, such as miRNA-489, which functions to maintain satellite cells in a quiescent state. Although muscle-specific miRNAs have been identified, many of the molecular mechanisms that regulate myogenesis that are regulated by miRNAs still remain unknown. In this study, we have shown that miR-128a is highly expressed in brain and skeletal muscle, and increases during myoblast differentiation. MiR-128a was found to regulate the target genes involved in insulin signaling, which include Insr (insulin receptor), Irs1 (insulin receptor substrate 1) and Pik3r1 (phosphatidylinositol 3-kinases regulatory 1) at both the mRNA and protein level. Overexpression of miR-128a in myoblasts inhibited cell proliferation by targeting IRS1. By contrast, inhibition of miR-128a induced myotube maturation and myofiber hypertrophy in vitro and in vivo. Moreover, our results demonstrate that miR-128a expression levels are negatively controlled by tumor necrosis factor α (TNF-α). TNF-α promoted myoblast proliferation and myotube hypertrophy by facilitating IRS1/Akt signaling via a direct decrease of miR-128a expression in both myoblasts and myotubes. In summary, we demonstrate that miR-128a regulates myoblast proliferation and myotube hypertrophy, and provides a novel mechanism through which IRS1-dependent insulin signaling is regulated in skeletal muscle.
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Affiliation(s)
- Norio Motohashi
- Program in Genomics, Department of Pediatrics, Boston Children's Hospital, Boston, MA 02115, USA
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Wang M, Amano SU, Flach RJR, Chawla A, Aouadi M, Czech MP. Identification of Map4k4 as a novel suppressor of skeletal muscle differentiation. Mol Cell Biol 2013; 33:678-87. [PMID: 23207904 PMCID: PMC3571342 DOI: 10.1128/mcb.00618-12] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Accepted: 11/20/2012] [Indexed: 12/19/2022] Open
Abstract
Myoblast differentiation into mature myotubes is a critical step in the development and repair of human skeletal muscle. Here we show that small interfering RNA (siRNA)-based silencing of the Ste20-like mitogen-activated protein 4 kinase 4 (Map4k4) in C2C12 myoblasts markedly enhances expression of myogenic differentiation genes, myoblast fusion, and myotube diameter. In contrast, adenovirus-mediated expression of native Map4k4 in C2C12 cells attenuates each of these processes, indicating that Map4k4 is a negative regulator of myogenic differentiation and hypertrophy. Expression of a Map4k4 kinase-inactive mutant enhances myotube formation, suggesting that the kinase activity of Map4k4 is essential for its inhibition of muscle differentiation. Map4k4 regulation of myogenesis is unlikely to be mediated by classic mitogen-activated protein kinase (MAPK) signaling pathways, because no significant difference in phosphorylation of extracellular signal-regulated kinase (ERK), p38, or c-Jun N-terminal kinase (JNK) is observed in Map4k4-silenced cells. Furthermore, silencing of these other MAPKs does not result in a hypertrophic myotube phenotype like that seen with Map4k4 depletion. Uniquely, Map4k4 silencing upregulates the expression of the myogenic regulatory factor Myf5, whose depletion inhibits myogenesis. Furthermore, Myf5 is required for enhancement of myotube formation in Map4k4-silenced cells, while Myf5 overexpression rescues Map4k4-mediated inhibition of myogenic differentiation. These results demonstrate that Map4k4 is a novel suppressor of skeletal muscle differentiation, acting through a Myf5-dependent mechanism.
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Affiliation(s)
- Mengxi Wang
- Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, Massachusetts, USA
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Enwere EK, Holbrook J, Lejmi-Mrad R, Vineham J, Timusk K, Sivaraj B, Isaac M, Uehling D, Al-awar R, LaCasse E, Korneluk RG. TWEAK and cIAP1 regulate myoblast fusion through the noncanonical NF-κB signaling pathway. Sci Signal 2012; 5:ra75. [PMID: 23074266 DOI: 10.1126/scisignal.2003086] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The fusion of mononucleated muscle progenitor cells (myoblasts) into multinucleated muscle fibers is a critical aspect of muscle development and regeneration. We identified the noncanonical nuclear factor κB (NF-κB) pathway as a signaling axis that drives the recruitment of myoblasts into new muscle fibers. Loss of cellular inhibitor of apoptosis 1 (cIAP1) protein led to constitutive activation of the noncanonical NF-κB pathway and an increase in the number of nuclei per myotube. Knockdown of essential mediators of NF-κB signaling, such as p100, RelB, inhibitor of κB kinase α, and NF-κB-inducing kinase, attenuated myoblast fusion in wild-type myoblasts. In contrast, the extent of myoblast fusion was increased when the activity of the noncanonical NF-κB pathway was enhanced by increasing the abundance of p52 and RelB or decreasing the abundance of tumor necrosis factor (TNF) receptor-associated factor 3, an inhibitor of this pathway. Low concentrations of the cytokine TNF-like weak inducer of apoptosis (TWEAK), which preferentially activates the noncanonical NF-κB pathway, also increased myoblast fusion, without causing atrophy or impairing myogenesis. These results identify roles for TWEAK, cIAP1, and noncanonical NF-κB signaling in the regulation of myoblast fusion and highlight a role for cytokine signaling during adult skeletal myogenesis.
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Affiliation(s)
- Emeka K Enwere
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, Ontario K1H 8M5, Canada
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Didier N, Hourdé C, Amthor H, Marazzi G, Sassoon D. Loss of a single allele for Ku80 leads to progenitor dysfunction and accelerated aging in skeletal muscle. EMBO Mol Med 2012; 4:910-23. [PMID: 22915554 PMCID: PMC3491824 DOI: 10.1002/emmm.201101075] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2011] [Revised: 06/25/2012] [Accepted: 06/26/2012] [Indexed: 12/12/2022] Open
Abstract
Muscle wasting is a major cause of morbidity in the elderly. Ku80 is required for DNA double strand repair and is implicated in telomere maintenance. Complete loss-of-function leads to reduced post-natal growth and severe progeria in mice. We examined the role of Ku80 in age-related skeletal muscle atrophy. While complete loss of Ku80 leads to pronounced aging in muscle as expected, accompanied by accumulation of DNA damage, loss of a single allele is sufficient to accelerate aging in skeletal muscle although post-natal growth is normal. Ku80 heterozygous muscle shows no DNA damage accumulation but undergoes premature telomere shortening that alters stem cell self-renewal through stress response pathways including p53. These data reveal an unexpected requirement for both Ku80 alleles for optimal progenitor function and prevention of early onset aging in muscle, as well as providing a useful model for therapeutic approaches.
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Affiliation(s)
- Nathalie Didier
- Myology Group, UMR S INSERM, Université Pierre et Marie Curie Paris VI, Pitié-Salpétrière, Paris, France
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29
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Pandey SN, Cabotage J, Shi R, Dixit M, Sutherland M, Liu J, Muger S, Harper SQ, Nagaraju K, Chen YW. Conditional over-expression of PITX1 causes skeletal muscle dystrophy in mice. Biol Open 2012; 1:629-639. [PMID: 23125914 PMCID: PMC3486706 DOI: 10.1242/bio.20121305] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Paired-like homeodomain transcription factor 1 (PITX1) was specifically up-regulated in patients with facioscapulohumeral muscular dystrophy (FSHD) by comparing the genome-wide mRNA expression profiles of 12 neuromuscular disorders. In addition, it is the only known direct transcriptional target of the double homeobox protein 4 (DUX4) of which aberrant expression has been shown to be the cause of FSHD. To test the hypothesis that up-regulation of PITX1 contributes to the skeletal muscle atrophy seen in patients with FSHD, we generated a tet-repressible muscle-specific Pitx1 transgenic mouse model in which expression of PITX1 in skeletal muscle can be controlled by oral administration of doxycycline. After PITX1 was over-expressed in the skeletal muscle for 5 weeks, the mice exhibited significant loss of body weight and muscle mass, decreased muscle strength, and reduction of muscle fiber diameters. Among the muscles examined, the tibialis anterior, gastrocnemius, quadricep, bicep, tricep and deltoid showed significant reduction of muscle mass, while the soleus, masseter and diaphragm muscles were not affected. The most prominent pathological change was the development of atrophic muscle fibers with mild necrosis and inflammatory infiltration. The affected myofibers stained heavily with NADH-TR with the strongest staining in angular-shaped atrophic fibers. Some of the atrophic fibers were also positive for embryonic myosin heavy chain using immunohistochemistry. Immunoblotting showed that the p53 was up-regulated in the muscles over-expressing PITX1. The results suggest that the up-regulation of PITX1 followed by activation of p53-dependent pathways may play a major role in the muscle atrophy developed in the mouse model.
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Affiliation(s)
- Sachchida N. Pandey
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Jennifer Cabotage
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Rongye Shi
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Manjusha Dixit
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Margret Sutherland
- Department of Integrative Systems Biology, George Washington University, Washington, DC 48109, USA
- Center for Neuroscience Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Jian Liu
- Center for Gene Therapy, The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA
| | - Stephanie Muger
- Center for Neuroscience Research, Children's National Medical Center, Washington, DC 20010, USA
| | - Scott Q. Harper
- Center for Gene Therapy, The Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA
- Department of Pediatrics, Ohio State University College of Medicine, Columbus, OH 43205, USA
| | - Kanneboyina Nagaraju
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
- Department of Integrative Systems Biology, George Washington University, Washington, DC 48109, USA
| | - Yi-Wen Chen
- Center for Genetic Medicine Research, Children's National Medical Center, Washington, DC 20010, USA
- Department of Integrative Systems Biology, George Washington University, Washington, DC 48109, USA
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Trendelenburg AU, Meyer A, Jacobi C, Feige JN, Glass DJ. TAK-1/p38/nNFκB signaling inhibits myoblast differentiation by increasing levels of Activin A. Skelet Muscle 2012; 2:3. [PMID: 22313861 PMCID: PMC3295657 DOI: 10.1186/2044-5040-2-3] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 02/07/2012] [Indexed: 11/18/2022] Open
Abstract
Background Skeletal-muscle differentiation is required for the regeneration of myofibers after injury. The differentiation capacity of satellite cells is impaired in settings of old age, which is at least one factor in the onset of sarcopenia, the age-related loss of skeletal-muscle mass and major cause of frailty. One important cause of impaired regeneration is increased levels of transforming growth factor (TGF)-β accompanied by reduced Notch signaling. Pro-inflammatory cytokines are also upregulated in aging, which led us hypothesize that they might potentially contribute to impaired regeneration in sarcopenia. Thus, in this study, we further analyzed the muscle differentiation-inhibition pathway mediated by pro-inflammatory cytokines in human skeletal muscle cells (HuSKMCs). Methods We studied the modulation of HuSKMC differentiation by the pro-inflammatory cytokines interleukin (IL)-1α and tumor necrosis factor (TNF)-α The grade of differentiation was determined by either imaging (fusion index) or creatine kinase (CK) activity, a marker of muscle differentiation. Secretion of TGF-β proteins during differentiation was assessed by using a TGF-β-responsive reporter-gene assay and further identified by means of pharmacological and genetic inhibitors. In addition, signaling events were monitored by western blotting and reverse transcription PCR, both in HuSKMC cultures and in samples from a rat sarcopenia study. Results The pro-inflammatory cytokines IL-1α and TNF-α block differentiation of human myoblasts into myotubes. This anti-differentiation effect requires activation of TGF-β-activated kinase (TAK)-1. Using pharmacological and genetic inhibitors, the TAK-1 pathway could be traced to p38 and NFκB. Surprisingly, the anti-differentiation effect of the cytokines required the transcriptional upregulation of Activin A, which in turn acted through its established signaling pathway: ActRII/ALK/SMAD. Inhibition of Activin A signaling was able to rescue human myoblasts treated with IL-1β or TNF-α, resulting in normal differentiation into myotubes. Studies in aged rats as a model of sarcopenia confirmed that this pro-inflammatory cytokine pathway identified is activated during aging. Conclusions In this study, we found an unexpected connection between cytokine and Activin signaling, revealing a new mechanism by which cytokines affect skeletal muscle, and establishing the physiologic relevance of this pathway in the impaired regeneration seen in sarcopenia.
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Morosetti R, Gliubizzi C, Sancricca C, Broccolini A, Gidaro T, Lucchini M, Mirabella M. TWEAK in inclusion-body myositis muscle: possible pathogenic role of a cytokine inhibiting myogenesis. THE AMERICAN JOURNAL OF PATHOLOGY 2012; 180:1603-13. [PMID: 22314077 DOI: 10.1016/j.ajpath.2011.12.027] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 11/19/2011] [Accepted: 12/13/2011] [Indexed: 10/14/2022]
Abstract
Tumor necrosis factor-like weak inducer of apoptosis (TWEAK) and its receptor Fn14 exert pleiotropic effects, including regulation of myogenesis. Sporadic inclusion-body myositis (IBM) is the most common muscle disease of the elderly population and leads to severe disability. IBM mesoangioblasts, different from mesoangioblasts in other inflammatory myopathies, display a myogenic differentiation defect. The objective of the present study was to investigate TWEAK-Fn14 expression in IBM and other inflammatory myopathies and explore whether TWEAK modulation affects myogenesis in IBM mesoangioblasts. TWEAK, Fn14, and NF-κB expression was assessed by immunohistochemistry and Western blot in cell samples from both muscle biopsies and primary cultures. Mesoangioblasts isolated from samples of IBM, dermatomyositis, polymyositis, and control muscles were treated with recombinant human TWEAK, Fn14-Fc chimera, and anti-TWEAK antibody. TWEAK-RNA interference was performed in IBM and dermatomyositis mesoangioblasts. TWEAK levels in culture media were determined by enzyme-linked immunosorbent assay. In IBM muscle, we found increased TWEAK-Fn14 expression. Increased levels of TWEAK were found in differentiation medium from IBM mesoangioblasts. Moreover, TWEAK inhibited myogenic differentiation of mesoangioblasts. Consistent with this evidence, TWEAK inhibition by Fn14-Fc chimera or short interfering RNA induced myogenic differentiation of IBM mesoangioblasts. We provide evidence that TWEAK is a negative regulator of human mesoangioblast differentiation. Dysregulation of the TWEAK-Fn14 axis in IBM muscle may induce progressive muscle atrophy and reduce activation and differentiation of muscle precursor cells.
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Affiliation(s)
- Roberta Morosetti
- Department of Neurosciences, Institute of Neurology, Università Cattolica, Rome, Italy
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Miyake T, McDermott JC, Gramolini AO. A method for the direct identification of differentiating muscle cells by a fluorescent mitochondrial dye. PLoS One 2011; 6:e28628. [PMID: 22174849 PMCID: PMC3235136 DOI: 10.1371/journal.pone.0028628] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2011] [Accepted: 11/11/2011] [Indexed: 11/18/2022] Open
Abstract
Identification of differentiating muscle cells generally requires fixation, antibodies directed against muscle specific proteins, and lengthy staining processes or, alternatively, transfection of muscle specific reporter genes driving GFP expression. In this study, we examined the possibility of using the robust mitochondrial network seen in maturing muscle cells as a marker of cellular differentiation. The mitochondrial fluorescent tracking dye, MitoTracker, which is a cell-permeable, low toxicity, fluorescent dye, allowed us to distinguish and track living differentiating muscle cells visually by epi-fluorescence microscopy. MitoTracker staining provides a robust and simple detection strategy for living differentiating cells in culture without the need for fixation or biochemical processing.
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Affiliation(s)
- Tetsuaki Miyake
- Department of Physiology, University of Toronto, Best Institute Medical Research, Toronto, Canada
- * E-mail: (AOG); (TM)
| | | | - Anthony O. Gramolini
- Department of Physiology, University of Toronto, Best Institute Medical Research, Toronto, Canada
- * E-mail: (AOG); (TM)
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PW1 gene/paternally expressed gene 3 (PW1/Peg3) identifies multiple adult stem and progenitor cell populations. Proc Natl Acad Sci U S A 2011; 108:11470-5. [PMID: 21709251 DOI: 10.1073/pnas.1103873108] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
A variety of markers are invaluable for identifying and purifying stem/progenitor cells. Here we report the generation of a murine reporter line driven by Pw1 that reveals cycling and quiescent progenitor/stem cells in all adult tissues thus far examined, including the intestine, blood, testis, central nervous system, bone, skeletal muscle, and skin. Neurospheres generated from the adult PW1-reporter mouse show near 100% reporter-gene expression following a single passage. Furthermore, epidermal stem cells can be purified solely on the basis of reporter-gene expression. These cells are clonogenic, repopulate the epidermal stem-cell niches, and give rise to new hair follicles. Finally, we demonstrate that only PW1 reporter-expressing epidermal cells give rise to follicles that are capable of self-renewal following injury. Our data demonstrate that PW1 serves as an invaluable marker for competent self-renewing stem cells in a wide array of adult tissues, and the PW1-reporter mouse serves as a tool for rapid stem cell isolation and characterization.
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Tamaki T, Tono K, Uchiyama Y, Okada Y, Masuda M, Soeda S, Nitta M, Akatsuka A. Origin and hierarchy of basal lamina-forming and -non-forming myogenic cells in mouse skeletal muscle in relation to adhesive capacity and Pax7 expression in vitro. Cell Tissue Res 2011; 344:147-68. [PMID: 21274567 DOI: 10.1007/s00441-010-1127-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Accepted: 12/17/2010] [Indexed: 01/06/2023]
Abstract
As a novel approach to distinguish skeletal myogenic cell populations, basal lamina (BL) formation of myogenic cells was examined in the mouse compensatory enlarged plantaris muscles in vivo and in fiber-bundle cultures in vitro. MyoD(+) myogenic cells located inside the regenerative muscle fiber BL were laminin(-) but interstitial MyoD(+) cells were laminin(+). This was also confirmed by electron microscopy as structural BL formation. Similar trends were observed in the fiber-bundle cultures including satellite cells and interstitial myogenic cells and laminin(+) myogenic cells predominantly showed non-adhesive (non-Ad) behavior with Pax7(-), whereas laminin(-) cells were adhesive (Ad) with Pax7(+). Moreover, non-Ad/laminin(+) and Ad/laminin(-) myotubes were also observed and the former type showed spontaneous contractions, while the latter type did not. The origin and hierarchy of Ad/Pax7(+)/laminin(-) and non-Ad/Pax7(-)/laminin(+) myogenic cells were also examined using skeletal muscle interstitium-derived CD34(+)/45(-) (Sk-34) and CD34(-)/45(-) (Sk-DN) multipotent stem cells, which were composed of non-committed myogenic cells with a few (<1%) Pax7(+) cells in the Sk-DN cells at fresh isolation. Both cell types were separated by Ad/non-Ad capacity in repetitive culture. As expected, both Ad/Pax7(+)/laminin(-) and non-Ad/Pax7(-)/laminin(+) myogenic cells consistently appeared in the Ad and non-Ad cell culture. However, Ad/Pax7(+)/laminin(-) cells were repeatedly detected in the non-Ad cell culture, while the opposite phenomenon did not occur. This indicates that the source of non-Ad/ Pax7(-)/laminin(+) myogenic cells was present in the Sk-34 and Sk-DN stem cells and they were able to produce Ad/ Pax7(+)/ laminin(-) myogenic cells during myogenesis as primary myoblasts and situated hierarchically upstream of the latter cells.
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Affiliation(s)
- Tetsuro Tamaki
- Muscle Physiology and Cell Biology Unit, Department of Regenerative Medicine, Division of Basic Clinical Science, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa, 259-1193, Japan.
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Bhatnagar S, Panguluri SK, Gupta SK, Dahiya S, Lundy RF, Kumar A. Tumor necrosis factor-α regulates distinct molecular pathways and gene networks in cultured skeletal muscle cells. PLoS One 2010; 5:e13262. [PMID: 20967264 PMCID: PMC2953497 DOI: 10.1371/journal.pone.0013262] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Accepted: 09/14/2010] [Indexed: 11/18/2022] Open
Abstract
Background Skeletal muscle wasting is a debilitating consequence of large number of disease states and conditions. Tumor necrosis factor-α (TNF-α) is one of the most important muscle-wasting cytokine, elevated levels of which cause significant muscular abnormalities. However, the underpinning molecular mechanisms by which TNF-α causes skeletal muscle wasting are less well-understood. Methodology/Principal Findings We have used microarray, quantitative real-time PCR (QRT-PCR), Western blot, and bioinformatics tools to study the effects of TNF-α on various molecular pathways and gene networks in C2C12 cells (a mouse myoblastic cell line). Microarray analyses of C2C12 myotubes treated with TNF-α (10 ng/ml) for 18h showed differential expression of a number of genes involved in distinct molecular pathways. The genes involved in nuclear factor-kappa B (NF-kappaB) signaling, 26s proteasome pathway, Notch1 signaling, and chemokine networks are the most important ones affected by TNF-α. The expression of some of the genes in microarray dataset showed good correlation in independent QRT-PCR and Western blot assays. Analysis of TNF-treated myotubes showed that TNF-α augments the activity of both canonical and alternative NF-κB signaling pathways in myotubes. Bioinformatics analyses of microarray dataset revealed that TNF-α affects the activity of several important pathways including those involved in oxidative stress, hepatic fibrosis, mitochondrial dysfunction, cholesterol biosynthesis, and TGF-β signaling. Furthermore, TNF-α was found to affect the gene networks related to drug metabolism, cell cycle, cancer, neurological disease, organismal injury, and abnormalities in myotubes. Conclusions TNF-α regulates the expression of multiple genes involved in various toxic pathways which may be responsible for TNF-induced muscle loss in catabolic conditions. Our study suggests that TNF-α activates both canonical and alternative NF-κB signaling pathways in a time-dependent manner in skeletal muscle cells. The study provides novel insight into the mechanisms of action of TNF-α in skeletal muscle cells.
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Affiliation(s)
- Shephali Bhatnagar
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, United States of America
| | - Siva K. Panguluri
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, United States of America
| | - Sanjay K. Gupta
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, United States of America
| | - Saurabh Dahiya
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, United States of America
| | - Robert F. Lundy
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, United States of America
| | - Ashok Kumar
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, United States of America
- * E-mail:
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Bakkar N, Guttridge DC. NF-kappaB signaling: a tale of two pathways in skeletal myogenesis. Physiol Rev 2010; 90:495-511. [PMID: 20393192 DOI: 10.1152/physrev.00040.2009] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
NF-kappaB is a ubiquitiously expressed transcription factor that plays vital roles in innate immunity and other processes involving cellular survival, proliferation, and differentiation. Activation of NF-kappaB is controlled by an IkappaB kinase (IKK) complex that can direct either canonical (classical) NF-kappaB signaling by degrading the IkappaB inhibitor and releasing p65/p50 dimers to the nucleus, or causes p100 processing and nuclear translocation of RelB/p52 via a noncanonical (alternative) pathway. Under physiological conditions, NF-kappaB activity is transiently regulated, whereas constitutive activation of this transcription factor typically in the classical pathway is associated with a multitude of disease conditions, including those related to skeletal muscle. How NF-kappaB functions in muscle diseases is currently under intense investigation. Insight into this role of NF-kappaB may be gained by understanding at a more basic level how this transcription factor contributes to skeletal muscle cell differentiation. Recent data from knockout mice support that the classical NF-kappaB pathway functions as an inhibitor of skeletal myogenesis and muscle regeneration acting through multiple mechanisms. In contrast, alternative NF-kappaB signaling does not appear to be required for myofiber conversion, but instead functions in myotube homeostasis by regulating mitochondrial biogenesis. Additional knowledge of these signaling pathways in skeletal myogenesis should aid in the development of specific inhibitors that may be useful in treatments of muscle disorders.
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Affiliation(s)
- Nadine Bakkar
- Department of Molecular Virology, Immunology, and Medical Genetics, Arthur G. James Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio 43210, USA
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The cleavage of HuR interferes with its transportin-2-mediated nuclear import and promotes muscle fiber formation. Cell Death Differ 2010; 17:1588-99. [PMID: 20379198 DOI: 10.1038/cdd.2010.34] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Although the function of posttranscriptional processes in regulating the expression of genes involved in muscle fiber formation (myogenesis) is well accepted, the mechanisms by which these effects are mediated remain elusive. Here, we uncover such a mechanism and show that during myogenesis, a fraction of the posttranscriptional regulator human antigen R (HuR) is cleaved in a caspase-dependent manner in both cell culture and animal models. Disruption of caspase activity in cultured myoblasts or knocking out the caspase-3 gene in mice significantly reduced HuR cleavage and the cytoplasmic accumulation of HuR in muscle fibers. The non-cleavable isoform of HuR, HuRD226A, failed to reestablish the myogenic potential of HuR-depleted myoblasts. HuR cleavage generates two fragments: HuR-cleavage product 1 (HuR-CP1) (24 kDa) and HuR-CP2 (8 kDa). Here, we show that one of these fragments (HuR-CP1) binds to the HuR import factor transportin-2 (TRN2) allowing HuR to accumulate in the cytoplasm. As this cytoplasmic accumulation is required for the promyogenic function of HuR, our data support a model, whereby during the transition phase from myoblasts to myotubes, a proportion of HuR is cleaved to generate HuR-CP1. By interfering with the TRN2-mediated import of HuR, this CP helps non-cleaved HuR accumulate in the cytoplasm thus promoting myogenesis.
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Coletti D, Scaramuzzo FA, Montemiglio LC, Pristerà A, Teodori L, Adamo S, Barteri M. Culture of skeletal muscle cells in unprecedented proximity to a gold surface. J Biomed Mater Res A 2010; 91:370-7. [PMID: 18980225 DOI: 10.1002/jbm.a.32243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Culturing of skeletal muscle cells on conductive surfaces is required to develop electronic device-muscle junctions for tissue engineering and medical applications. We characterized from a molecular and morphological point of view myogenic cells cultured on gold and on cysteamine-coated gold, as compared to the standard plastic for cell culture. Our results show that cell proliferation and survival are comparable between cells grown on either of the gold surface or plastic. The majority of the cells cultured on gold surfaces retain the ability to respond to differentiation cues, as shown by nuclear translocation of myogenin. Following terminal differentiation, the myotubes cultured on cysteamine-coated gold resemble myotube cultures obtained on plastic for the size and orientation of the myotube bundles retaining most of myosin expression; on the contrary, the myotube cultures on gold show a clumped morphology, likely due to repulsive cell-substratum interaction resulting in aberrant differentiation. On the basis of the aforementioned evidences, the culture of muscle cells on cysteamine-coated gold represents an advance with respect to previously reported substrata. The cysteamine self-assembled monolayer coating is a simple approach to accomplish cultures of myotubes in unprecedented tight proximity to conductive surfaces.
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Affiliation(s)
- Dario Coletti
- Department of Histology and Medical Embryology, Sapienza University of Rome, and Interuniversity Institute of Myology, Via Scarpa 14, Rome, Italy
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Mitchell KJ, Pannérec A, Cadot B, Parlakian A, Besson V, Gomes ER, Marazzi G, Sassoon DA. Identification and characterization of a non-satellite cell muscle resident progenitor during postnatal development. Nat Cell Biol 2010; 12:257-66. [PMID: 20118923 DOI: 10.1038/ncb2025] [Citation(s) in RCA: 311] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2009] [Accepted: 01/14/2010] [Indexed: 02/06/2023]
Abstract
Satellite cells are resident myogenic progenitors in postnatal skeletal muscle involved in muscle postnatal growth and adult regenerative capacity. Here, we identify and describe a population of muscle-resident stem cells, which are located in the interstitium, that express the cell stress mediator PW1 but do not express other markers of muscle stem cells such as Pax7. PW1(+)/Pax7(-) interstitial cells (PICs) are myogenic in vitro and efficiently contribute to skeletal muscle regeneration in vivo as well as generating satellite cells and PICs. Whereas Pax7 mutant satellite cells show robust myogenic potential, Pax7 mutant PICs are unable to participate in myogenesis and accumulate during postnatal growth. Furthermore, we found that PICs are not derived from a satellite cell lineage. Taken together, our findings uncover a new and anatomically identifiable population of muscle progenitors and define a key role for Pax7 in a non-satellite cell population during postnatal muscle growth.
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MESH Headings
- Actins/metabolism
- Animals
- Animals, Newborn
- Antigens, CD34/metabolism
- Antigens, Ly/metabolism
- Cell Count
- Cell Differentiation/physiology
- Cell Lineage
- Cell Proliferation
- Ki-67 Antigen/metabolism
- Kruppel-Like Transcription Factors/metabolism
- Membrane Proteins/metabolism
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Nude
- Mice, Transgenic
- Microfilament Proteins/metabolism
- Muscle Development/physiology
- Muscle Fibers, Skeletal/cytology
- Muscle Fibers, Skeletal/metabolism
- Muscle Proteins/metabolism
- Muscle, Skeletal/cytology
- Muscle, Skeletal/growth & development
- Muscle, Skeletal/physiology
- MyoD Protein/metabolism
- Myocytes, Smooth Muscle/cytology
- Myocytes, Smooth Muscle/metabolism
- Myosin Heavy Chains/metabolism
- PAX3 Transcription Factor
- PAX7 Transcription Factor/genetics
- PAX7 Transcription Factor/metabolism
- Paired Box Transcription Factors/genetics
- Proteins/genetics
- RNA, Untranslated
- Regeneration/physiology
- Satellite Cells, Skeletal Muscle/cytology
- Satellite Cells, Skeletal Muscle/metabolism
- Satellite Cells, Skeletal Muscle/transplantation
- Stem Cell Transplantation
- Stem Cells/cytology
- Stem Cells/metabolism
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Affiliation(s)
- Kathryn J Mitchell
- Myology Group, UMR S 787 INSERM, Université Pierre et Marie Curie Paris VI, Paris, 75634, France
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Abstract
PURPOSE OF REVIEW The present investigation is devoted to uncovering the different signaling pathways - particularly transcriptional factors - involved in muscle wasting. RECENT FINDINGS Although the search for the cachectic factor(s) started a long time ago, and although many scientific and economic efforts have been devoted to its discovery, we are still a long way from knowing the whole truth. In this review we describe recent findings about the tumor necrosis factor (TNF)-alpha, interleukin (IL)-6, TWEAK and myostatin actions in cancer cachexia models. SUMMARY The main aim of the present review is to summarize and evaluate the different molecular mechanisms and catabolic mediators (mainly cytokines) involved in cancer cachexia since they may represent targets for future promising clinical investigations.
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Jiang X, Yu Y, Yang HW, Agar NYR, Frado L, Johnson MD. The imprinted gene PEG3 inhibits Wnt signaling and regulates glioma growth. J Biol Chem 2010; 285:8472-80. [PMID: 20064927 PMCID: PMC2832996 DOI: 10.1074/jbc.m109.069450] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
The imprinted gene PEG3 confers parenting and sexual behaviors, alters growth and development, and regulates apoptosis. However, a molecular mechanism that can account for the diverse functions of Peg3/Pw1 is not known. To elucidate Peg3-regulated pathways, we performed a functional screen in zebrafish. Enforced overexpression of PEG3 mRNA during zebrafish embryogenesis decreased β-catenin protein expression and inhibited Wnt-dependent tail development. Peg3/Pw1 also inhibited Wnt signaling in human cells by binding to β-catenin and promoting its degradation via a p53/Siah1-dependent, GSK3β-independent proteasomal pathway. The inhibition of the Wnt pathway by Peg3/Pw1 suggested a role in tumor suppression. Hypermethylation of the PEG3 promoter in primary human gliomas led to a loss of imprinting and decreased PEG3 mRNA expression that correlated with tumor grade. The decrease in Peg3/Pw1 protein expression increased β-catenin, promoted proliferation, and inhibited p53-dependent apoptosis in human CD133+ glioma stem cells. Thus, mammalian imprinting utilizes Peg3/Pw1 to co-opt the Wnt pathway, thereby regulating development and glioma growth.
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Affiliation(s)
- Xiuli Jiang
- Department of Neurosurgery, Brigham and Women's Hospital, and Harvard Medical School, Boston, Massachusetts 02115, USA
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42
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Use of pifithrin to inhibit p53-mediated signalling of TNF in dystrophic muscles of mdx mice. Mol Cell Biochem 2009; 337:119-31. [PMID: 19859789 DOI: 10.1007/s11010-009-0291-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2009] [Accepted: 10/08/2009] [Indexed: 10/20/2022]
Abstract
Tumour Necrosis Factor (TNF) plays a major role in exacerbating necrosis of dystrophic muscle; however, the precise molecular mechanism underlying this effect of TNF is unknown. This study investigates the role that p53 plays in TNF-mediated necrosis of dystrophic myofibres by inhibiting p53 using pifithrin-alpha and three pifithrin-beta analogues. Tissue culture studies using C2C12 myoblasts established that pifithrin-alpha was toxic to differentiating myoblasts at concentrations greater than 10 muM. While non-toxic concentrations of pifithrin-alpha did not prevent the TNF-mediated inhibition of myoblast differentiation, Western blots indicated that nuclear levels of p53 were higher in TNF-treated myoblasts indicating that TNF does elevate p53. In contrast, in vivo studies in adult mdx mice showed that pifithrin-alpha significantly reduced myofibre necrosis that resulted from voluntary wheel running over 48 h. These results support the hypothesis that p53 plays some role in TNF-mediated necrosis of dystrophic muscle and present a potential new target for therapeutic interventions.
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43
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Sciorati C, Touvier T, Buono R, Pessina P, François S, Perrotta C, Meneveri R, Clementi E, Brunelli S. Necdin is expressed in cachectic skeletal muscle to protect fibers from tumor-induced wasting. J Cell Sci 2009; 122:1119-25. [PMID: 19339547 DOI: 10.1242/jcs.041665] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Skeletal muscles of subjects with advanced cancer undergo progressive wasting, referred to as cachexia. Cachexia is an important area for medical research because strategies proposed until now have yielded little benefit. We have recently identified necdin as a key player in fetal and postnatal physiological myogenesis and in muscle regeneration. Here we show that necdin is selectively expressed in muscles of cachetic mice and prove that its expression is causally linked to a protective response of the tissue against tumor-induced wasting, inhibition of myogenic differentiation and fiber regeneration. Necdin carries out this role mainly via interference with TNFalpha signaling at various levels, including regulation of expression of TNFR1 and p53, and regulation of the activity of caspase 3 and caspase 9. These data suggest that inhibition of muscle wasting using necdin is a feasible approach to treat cachexia in neoplastic patients.
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Affiliation(s)
- Clara Sciorati
- Division of Regenerative Medicine, San Raffaele Scientific Institute, 20132 Milan, Italy
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44
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Modulation of caspase activity regulates skeletal muscle regeneration and function in response to vasopressin and tumor necrosis factor. PLoS One 2009; 4:e5570. [PMID: 19440308 PMCID: PMC2680623 DOI: 10.1371/journal.pone.0005570] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2009] [Accepted: 04/20/2009] [Indexed: 11/19/2022] Open
Abstract
Muscle homeostasis involves de novo myogenesis, as observed in conditions of acute or chronic muscle damage. Tumor Necrosis Factor (TNF) triggers skeletal muscle wasting in several pathological conditions and inhibits muscle regeneration. We show that intramuscular treatment with the myogenic factor Arg8-vasopressin (AVP) enhanced skeletal muscle regeneration and rescued the inhibitory effects of TNF on muscle regeneration. The functional analysis of regenerating muscle performance following TNF or AVP treatments revealed that these factors exerted opposite effects on muscle function. Principal component analysis showed that TNF and AVP mainly affect muscle tetanic force and fatigue. Importantly, AVP counteracted the effects of TNF on muscle function when delivered in combination with the latter. Muscle regeneration is, at least in part, regulated by caspase activation, and AVP abrogated TNF-dependent caspase activation. The contrasting effects of AVP and TNF in vivo are recapitulated in myogenic cell cultures, which express both PW1, a caspase activator, and Hsp70, a caspase inhibitor. We identified PW1 as a potential Hsp70 partner by screening for proteins interacting with PW1. Hsp70 and PW1 co-immunoprecipitated and co-localized in muscle cells. In vivo Hsp70 protein level was upregulated by AVP, and Hsp70 overexpression counteracted the TNF block of muscle regeneration. Our results show that AVP counteracts the effects of TNF through cross-talk at the Hsp70 level. Therefore, muscle regeneration, both in the absence and in the presence of cytokines may be enhanced by increasing Hsp70 expression.
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45
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Abstract
PURPOSE OF REVIEW To describe the most relevant recent findings concerning the molecular mechanisms involved in both fat and muscle tissues in cachectic cancer patients. RECENT FINDINGS Relevant progress has been made in the mechanism of signalling protein metabolism in skeletal muscle. PI3K has a dual role inhibiting protein degradation by inhibition of Atrogin-1 and MuRF1 gene expression and facilitating AKT phosphorylation, leading to increased protein synthesis. Interestingly, Caspase-3 activity is intimately associated with myofibrillar protein degradation in muscle tissue. With respect to fat metabolism, increased lipolysis in human cancer cachexia seems to be directly connected to increased hormone-sensitive lipase activity. SUMMARY The results and findings described in this review represent important progress in wasting disease mechanisms and may provide hints for future therapeutic approaches in cancer cachexia.
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46
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47
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Alter J, Rozentzweig D, Bengal E. Inhibition of myoblast differentiation by tumor necrosis factor alpha is mediated by c-Jun N-terminal kinase 1 and leukemia inhibitory factor. J Biol Chem 2008; 283:23224-34. [PMID: 18552402 DOI: 10.1074/jbc.m801379200] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The proinflammatory cytokine, TNFalpha plays a major role in muscle wasting occurring in chronic diseases and muscular dystrophies. Among its other functions, TNFalpha perturbs muscle regeneration by preventing satellite cell differentiation. In the present study, the role of c-Jun N-terminal kinase (JNK), a mediator of TNFalpha, was investigated in differentiating myoblast cell lines. Addition of TNFalpha to C2 myoblasts induced immediate and delayed phases of JNK activity. The delayed phase is associated with myoblast proliferation. Inhibition of JNK activity prevented proliferation and restored differentiation to TNFalpha-treated myoblasts. Studies with cell lines expressing MyoD:ER chimera and lacking JNK1 or JNK2 genes indicate that JNK1 activity mediates the effects of TNFalpha on myoblast proliferation and differentiation. TNFalpha does not induce proliferation or inhibit differentiation of JNK1-null myoblasts. However, differentiation of JNK1-null myoblasts is inhibited when they are grown in conditioned medium derived from cell lines affected by TNFalpha. We investigated the induced synthesis of several candidate growth factors and cytokines following treatment with TNFalpha. Expression of IL-6 and leukemia inhibitory factor (LIF) was induced by TNFalpha in wild-type and JNK2-null myoblasts. However, LIF expression was not induced by TNFalpha in JNK1-null myoblasts. Addition of LIF to the growth medium of JNK1-null myoblasts prevented their differentiation. Moreover, LIF-neutralizing antibodies added to the medium of C2 myoblasts prevented inhibition of differentiation mediated by TNFalpha. Hence, TNFalpha promotes myoblast proliferation through JNK1 and prevents myoblast differentiation through JNK1-mediated secretion of LIF.
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Affiliation(s)
- Joel Alter
- Department of Biochemistry, Technion-Israel Institute of Technology, Haifa 31096, Israel
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48
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Abstract
PURPOSE OF REVIEW A dynamic network of anabolic and catabolic pathways regulates skeletal muscle mass in adult organisms. Muscle atrophy is the detrimental outcome of an imbalance of this network. The purpose of this review is to provide a critical evaluation of different forms of muscle atrophy from a mechanistic and therapeutic point of view. RECENT FINDINGS The identification and molecular characterization of distinct pathways implicated in the pathogenesis of muscle atrophy have revealed potential targets for therapeutic interventions. However, an effective application of these therapies requires a better understanding of the relative contribution of these pathways to the development of muscle atrophy in distinct pathological conditions. SUMMARY We propose that the decline in anabolic signals ('passive atrophy') and activation of catabolic pathways ('active atrophy') contribute differently to the pathogenesis of muscle atrophy associated with distinct diseases or unfavorable conditions. Interestingly, these pathways might converge on common transcriptional effectors, suggesting that an optimal intervention should be directed to targets at the chromatin level. We provide the rationale for the use of epigenetic drugs such as deacetylase inhibitors, which target multiple signaling pathways implicated in the pathogenesis of muscle atrophy.
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Affiliation(s)
- Valentina Guasconi
- Dulbecco Telethon Institute (DTI) at Fondazione Santa Lucia/EBRI, Rome, Italy
| | - Pier Lorenzo Puri
- Dulbecco Telethon Institute (DTI) at Fondazione Santa Lucia/EBRI, Rome, Italy
- The Burnham Institute for Medical Research, California, USA
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49
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TCAP knockdown by RNA interference inhibits myoblast differentiation in cultured skeletal muscle cells. Neuromuscul Disord 2008; 18:413-22. [PMID: 18440815 DOI: 10.1016/j.nmd.2008.03.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Revised: 02/29/2008] [Accepted: 03/11/2008] [Indexed: 11/20/2022]
Abstract
Null mutation of titin-cap (TCAP) causes limb-girdle muscular dystrophy type 2G (LGMD2G). LGMD2G patients develop muscle atrophy, and lose the ability to walk by their third decade. Previous findings suggest that TCAP regulates myostatin, a key regulator of muscle growth. We tested the hypothesis that TCAP knockdown with RNA interference will lead to differential expression of genes involved in muscle proliferation and differentiation, impairing muscle cell growth. mRNA from cultured cells treated with TCAP siRNA duplex constructs was analyzed using Northern blots and real-time RT-PCR. siRNA treatment decreased TCAP mRNA expression in differentiating muscle cells. Significant (p<0.05) decreases in mRNA were observed for myogenic regulatory factors. siRNA treatment also prevented development of the normal phenotype of muscle cells. Our findings suggest that TCAP knockdown with RNA interference alters normal muscle cell differentiation.
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50
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O'Connor JC, McCusker RH, Strle K, Johnson RW, Dantzer R, Kelley KW. Regulation of IGF-I function by proinflammatory cytokines: at the interface of immunology and endocrinology. Cell Immunol 2008; 252:91-110. [PMID: 18325486 DOI: 10.1016/j.cellimm.2007.09.010] [Citation(s) in RCA: 167] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2007] [Accepted: 09/01/2007] [Indexed: 11/16/2022]
Abstract
During the past decade, the immune and endocrine systems have been discovered to interact in controlling physiologic processes as diverse as cell growth and differentiation, metabolism, and even human and animal behavior. The interaction between these two major physiological systems is a bi-directional process. While it has been well documented that hormones, including prolactin (PRL), growth hormone (GH), insulin-like growth factor-I (IGF-I), and thyroid-stimulating hormone (TSH), regulate a variety of immune events, a great deal of data have accumulated supporting the notion that cytokines from the innate immune system also affect the neuroendocrine system. Communication between these two systems coordinates processes that are necessary to maintain homeostasis. Proinflammatory cytokines often act as negative regulatory signals that temper the action of hormones and growth factors. This system of 'checks and balances' is an active, ongoing process, even in healthy individuals. Dysregulation of this process has been implicated as a potential pathogenic factor in the development of co-morbid conditions associated with several chronic inflammatory diseases, including type 2 diabetes, cardiovascular disease, cerebrovascular disease, inflammatory bowel disease, rheumatoid arthritis, major depression, and even normal aging. Over the past decade, research in our laboratory has focused on the ability of the major proinflammatory cytokines, tumor necrosis factor (TNF)alpha and interleukin (IL)-1beta, to induce a state of IGF resistance. This review will highlight these and other new findings by explaining how proinflammatory cytokines induce resistance to the major growth factor, insulin-like growth factor-I (IGF-I). We also highlight that IGF-I can induce resistance or reduce sensitivity to brain TNFalpha and discuss how TNFalpha, IL-1beta, and IGF-I interact to regulate several aspects of behavior and cognition.
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Affiliation(s)
- Jason C O'Connor
- Integrative Immunology and Behavior Program, Department of Animal Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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