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Hosoyama T, Kawai‐Takaishi M, Iida H, Yamamoto Y, Nakamichi Y, Watanabe T, Takemura M, Kato S, Uezumi A, Matsui Y. Lack of vitamin D signalling in mesenchymal progenitors causes fatty infiltration in muscle. J Cachexia Sarcopenia Muscle 2024; 15:907-918. [PMID: 38533539 PMCID: PMC11154772 DOI: 10.1002/jcsm.13448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 01/22/2024] [Accepted: 01/31/2024] [Indexed: 03/28/2024] Open
Abstract
BACKGROUND Recent studies have indicated the importance of muscle quality in addition to muscle quantity in sarcopenia pathophysiology. Intramuscular adipose tissue (IMAT), which originates from mesenchymal progenitors (MPs) in adult skeletal muscle, is a key factor affecting muscle quality in older adults, suggesting that controlling IMAT formation is a promising therapeutic strategy for sarcopenia. However, the molecular mechanism underlying IMAT formation in older adults has not been clarified. We recently found that the vitamin D receptor (VDR) is highly expressed in MPs in comparison to myotubes (P = 0.028, N = 3), indicating a potential role of vitamin D signalling in MPs. In this study, we aimed to clarify the role of vitamin D signalling in MP kinetics, with a focus on adipogenesis. METHODS MPs isolated from mouse skeletal muscles were subjected to adipogenic differentiation conditions with or without vitamin D (1α,25(OH)2D3, 100 nM) for 7 days, and adipogenicity was evaluated based on adipogenic marker expression. For in vivo analysis, tamoxifen-inducible MP-specific VDR-deficient (VdrMPcKO) mice were newly developed to investigate whether lack of vitamin D signalling in MPs is involved in IMAT formation. To induce muscle atrophy, VdrMPcKO male mice were subjected to tenotomy of the gastrocnemius muscle, and then muscle weight, myofibre cross-sectional area, adipogenic marker expression, and fatty infiltration into the muscle were evaluated at 3 weeks after operation (N = 3-4). In addition, a vitamin D-deficient diet was provided to wild-type male mice (3 and 20 months of age, N = 5) for 3 months to investigate whether vitamin D deficiency causes IMAT formation. RESULTS Vitamin D treatment nearly completely inhibited adipogenesis of MPs through Runx1-mediated transcriptional modifications of early adipogenic factors such as PPARγ (P = 0.0031) and C/EBPα (P = 0.0027), whereas VDR-deficient MPs derived from VdrMPcKO mice differentiated into adipocytes even in the presence of vitamin D (P = 0.0044, Oil-Red O+ area). In consistency with in-vitro findings, VdrMPcKO mice and mice fed a vitamin D-deficient diet exhibited fat deposition in atrophied (P = 0.0311) and aged (P = 0.0216) skeletal muscle, respectively. CONCLUSIONS Vitamin D signalling is important to prevent fate decision of MPs towards the adipogenic lineage. As vitamin D levels decline with age, our data indicate that decreased vitamin D levels may be one of the causes of IMAT formation in older adults, and vitamin D signalling may be a novel therapeutic target for sarcopenia.
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Affiliation(s)
- Tohru Hosoyama
- Department of Musculoskeletal Disease, Research InstituteNational Center for Geriatrics and GerontologyObuJapan
| | - Minako Kawai‐Takaishi
- Department of Musculoskeletal Disease, Research InstituteNational Center for Geriatrics and GerontologyObuJapan
| | - Hiroki Iida
- Department of Musculoskeletal Disease, Research InstituteNational Center for Geriatrics and GerontologyObuJapan
- Department of Orthopaedic SurgeryNagoya University Graduate School of MedicineNagoyaJapan
| | - Yoko Yamamoto
- Department of Surgical OncologyThe University of TokyoTokyoJapan
| | - Yuko Nakamichi
- Institute for Oral ScienceMatsumoto Dental UniversityNaganoJapan
| | - Tsuyoshi Watanabe
- Center for Frailty and Locomotive SyndromeNational Center for Geriatrics and GerontologyObuJapan
- Department of Orthopaedic SurgeryNational Center for Geriatrics and GerontologyObuJapan
| | - Marie Takemura
- Center for Frailty and Locomotive SyndromeNational Center for Geriatrics and GerontologyObuJapan
| | - Shigeaki Kato
- Graduate School of Life Science and EngineeringIryo Sosei UniversityFukushimaJapan
- Research Institute of Innovative MedicineTokiwa FoundationFukushimaJapan
| | - Akiyoshi Uezumi
- Medical Institute of BioregulationKyushu UniversityFukuokaJapan
| | - Yasumoto Matsui
- Center for Frailty and Locomotive SyndromeNational Center for Geriatrics and GerontologyObuJapan
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Gartling G, Nakamura R, Bing R, Branski RC. A Novel Method for Thyroarytenoid Myofiber Culture. Laryngoscope 2023; 133:3109-3115. [PMID: 37227163 DOI: 10.1002/lary.30756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/20/2023] [Accepted: 04/29/2023] [Indexed: 05/26/2023]
Abstract
OBJECTIVES/HYPOTHESIS Myofiber culture has been employed to investigate muscle physiology in vitro and is well-established in the rodent hind limb. Thyroarytenoid (TA) myofiber culture has not been described, providing an opportunity to employ this method to investigate distinct TA myofiber functions. The purpose of this study was to assess the feasibility of a TA myofiber culture model. STUDY DESIGN In vitro. METHODS TA muscles from five Sprague Dawley rats were independently isolated and digested for 90 min. A smooth-tip, wide-bored pipette dissociated TA myofibers from cartilage, and the fibers were distributed on collagen-coated dishes and incubated at 37°C, 5% CO2 for 2 h. Myofiber specificity was determined via immunolabeling for desmin and myosin heavy chain (MHC). Myofibers viability was assessed over 7 days via esterase assay. Additional myofibers were immunolabeled for satellite cell marker Pax-7. Glucocorticoid (GC) receptor (GR) was immunolabeled following GC treatment. RESULTS The harvest technique yielded ~120 myofibers per larynx. By day 7, ~60% of the fibers remained attached and were calcein AM-positive/ethidium homodimer-negative, indicating viability. Myofibers were positive for desmin and MHC, indicating muscle specificity. Cells surrounding myofibers were positive for Pax-7, indicating the presence of myogenic satellite cells. Myofibers also responded to GC treatment as determined by GR nuclear translocation. CONCLUSION TA myofibers remained viable in culture for at least 7 days with a predictable response to exogenous stimuli. This technique provides novel investigative opportunities regarding TA structure and function. LEVEL OF EVIDENCE N/A Laryngoscope, 133:3109-3115, 2023.
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Affiliation(s)
- Gary Gartling
- Rehabilitation Medicine, NYU Grossman School of Medicine, New York City, New York, USA
| | - Ryosuke Nakamura
- Rehabilitation Medicine, NYU Grossman School of Medicine, New York City, New York, USA
| | - Renjie Bing
- Rehabilitation Medicine, NYU Grossman School of Medicine, New York City, New York, USA
| | - Ryan C Branski
- Rehabilitation Medicine, NYU Grossman School of Medicine, New York City, New York, USA
- Otolaryngology-Head and Neck Surgery, NYU Grossman School of Medicine, New York City, New York, USA
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Zhang T, Li J, Li X, Liu Y. Intermuscular adipose tissue in obesity and related disorders: cellular origins, biological characteristics and regulatory mechanisms. Front Endocrinol (Lausanne) 2023; 14:1280853. [PMID: 37920255 PMCID: PMC10619759 DOI: 10.3389/fendo.2023.1280853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 10/01/2023] [Indexed: 11/04/2023] Open
Abstract
Intermuscular adipose tissue (IMAT) is a unique adipose depot interspersed between muscle fibers (myofibers) or muscle groups. Numerous studies have shown that IMAT is strongly associated with insulin resistance and muscular dysfunction in people with metabolic disease, such as obesity and type 2 diabetes. Moreover, IMAT aggravates obesity-related muscle metabolism disorders via secretory factors. Interestingly, researchers have discovered that intermuscular brown adipocytes in rodent models provide new hope for obesity treatment by acting on energy dissipation, which inspired researchers to explore the underlying regulation of IMAT formation. However, the molecular and cellular properties and regulatory processes of IMAT remain debated. Previous studies have suggested that muscle-derived stem/progenitor cells and other adipose tissue progenitors contribute to the development of IMAT. Adipocytes within IMAT exhibit features that are similar to either white adipocytes or uncoupling protein 1 (UCP1)-positive brown adipocytes. Additionally, given the heterogeneity of skeletal muscle, which comprises myofibers, satellite cells, and resident mesenchymal progenitors, it is plausible that interplay between these cellular components actively participate in the regulation of intermuscular adipogenesis. In this context, we review recent studies associated with IMAT to offer insights into the cellular origins, biological properties, and regulatory mechanisms of IMAT. Our aim is to provide novel ideas for the therapeutic strategy of IMAT and the development of new drugs targeting IMAT-related metabolic diseases.
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Affiliation(s)
- Ting Zhang
- Center of Obesity and Metabolic Diseases, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
- Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
- Medical Research Center, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
| | - Jun Li
- Department of Orthopedics, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
| | - Xi Li
- Institute of Life Sciences, Chongqing Medical University, Chongqing, China
| | - Yanjun Liu
- Center of Obesity and Metabolic Diseases, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
- Center of Gastrointestinal and Minimally Invasive Surgery, Department of General Surgery, The Third People’s Hospital of Chengdu, Affiliated Hospital of Southwest Jiaotong University & The Second Affiliated Hospital of Chengdu, Chongqing Medical University, Chengdu, China
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Xu J, Strasburg GM, Reed KM, Velleman SG. Temperature and Growth Selection Effects on Proliferation, Differentiation, and Adipogenic Potential of Turkey Myogenic Satellite Cells Through Frizzled-7-Mediated Wnt Planar Cell Polarity Pathway. Front Physiol 2022; 13:892887. [PMID: 35677087 PMCID: PMC9167958 DOI: 10.3389/fphys.2022.892887] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/19/2022] [Indexed: 12/30/2022] Open
Abstract
Satellite cells (SCs) are a heterogeneous population of multipotential stem cells. During the first week after hatch, satellite cell function and fate are sensitive to temperature. Wingless-type mouse mammary tumor virus integration site family/planar cell polarity (Wnt/PCP) signaling pathway is significantly affected by thermal stress in turkey pectoralis major (p. major) muscle SCs. This pathway regulates the activity of SCs through a frizzled-7 (Fzd7) cell surface receptor and two intracellular effectors, rho-associated protein kinase (ROCK) and c-Jun. The objective of the present study was to determine the effects of thermal stress, growth selection, and the Fzd7-mediated Wnt/PCP pathway on proliferation, myogenic differentiation, lipid accumulation, and expression of myogenic and adipogenic regulatory genes. These effects were evaluated in SCs isolated from the p. major muscle of 1-week faster-growing modern commercial (NC) line of turkeys as compared to SCs of a slower-growing historic Randombred Control Line 2 (RBC2) turkey line. Heat stress (43°C) increased phosphorylation of both ROCK and c-Jun with greater increases observed in the RBC2 line. Cold stress (33°C) had an inhibitory effect on both ROCK and c-Jun phosphorylation with the NC line showing greater reductions. Knockdown of the expression of Fzd7 decreased proliferation, differentiation, and expression of myogenic regulatory genes: myoblast determination factor-1 and myogenin in both lines. Both lipid accumulation and expression of adipogenic regulatory genes: peroxisome proliferator-activated receptor-γ, CCAAT/enhancer-binding protein-β, and neuropeptide-Y were suppressed with the Fzd7 knockdown. The RBC2 line was more dependent on the Fzd7-mediated Wnt/PCP pathway for proliferation, differentiation, and lipid accumulation compared to the NC line. Thus, thermal stress may affect poultry breast muscle growth potential and protein to fat ratio by altering function and fate of SCs through the Fzd7-mediated Wnt/PCP pathway in a growth-dependent manner.
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Affiliation(s)
- Jiahui Xu
- Department of Animal Sciences, The Ohio State University, Wooster, OH, United States
| | - Gale M. Strasburg
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI, United States
| | - Kent M. Reed
- Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN, United States
| | - Sandra G. Velleman
- Department of Animal Sciences, The Ohio State University, Wooster, OH, United States
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Bradley AE, Wancket LM, Rinke M, Gruebbel MM, Saladino BH, Schafer K, Katsuta O, Garcia B, Chanut F, Hughes K, Nelson K, Himmel L, McInnes E, Schucker A, Uchida K. International Harmonization of Nomenclature and Diagnostic Criteria (INHAND): Nonproliferative and Proliferative Lesions of the Rabbit. J Toxicol Pathol 2021; 34:183S-292S. [PMID: 34712007 PMCID: PMC8544166 DOI: 10.1293/tox.34.183s] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
The INHAND (International Harmonization of Nomenclature and Diagnostic Criteria for
Lesions Project (www.toxpath.org/inhand.asp) is a joint initiative of the Societies of
Toxicologic Pathology from Europe (ESTP), Great Britain (BSTP), Japan (JSTP) and North
America (STP) to develop an internationally accepted nomenclature for proliferative and
non-proliferative lesions in laboratory animals. The purpose of this publication is to
provide a standardized nomenclature for classifying microscopic lesions observed in most
tissues and organs from the laboratory rabbit used in nonclinical safety studies. Some of
the lesions are illustrated by color photomicrographs. The standardized nomenclature
presented in this document is also available electronically on the internet
(http://www.goreni.org/). Sources of material included histopathology databases from
government, academia, and industrial laboratories throughout the world. Content includes
spontaneous lesions as well as lesions induced by exposure to test materials. Relevant
infectious and parasitic lesions are included as well. A widely accepted and utilized
international harmonization of nomenclature for lesions in laboratory animals will provide
a common language among regulatory and scientific research organizations in different
countries and increase and enrich international exchanges of information among
toxicologists and pathologists.
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Affiliation(s)
- Alys E Bradley
- Charles River Laboratories Edinburgh Ltd, Tranent, Scotland, UK
| | | | | | | | | | | | | | - Begonya Garcia
- Charles River Laboratories Edinburgh Ltd, Tranent, Scotland, UK
| | - Franck Chanut
- Sanofi, 1 Avenue Pierre Brosselette, 91380 Chilly-Mazarin, France
| | | | | | - Lauren Himmel
- Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Adrienne Schucker
- American Preclinical Services, LLC, 8945 Evergreen Blvd, Minneapolis, MN 55433
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Yamanouchi K, Nakamura K, Takeuchi S, Hosoyama T, Matsuwaki T, Nishihara M. Suppression of MyoD induces spontaneous adipogenesis in skeletal muscle progenitor cell culture. Anim Sci J 2021; 92:e13573. [PMID: 34231933 DOI: 10.1111/asj.13573] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 05/16/2021] [Accepted: 05/20/2021] [Indexed: 12/13/2022]
Abstract
The degree of intramuscular adipose tissue accumulation is one of the factors affecting meat quality. Accumulation of adipocytes is also observed under the pathological condition of skeletal muscle such as muscular dystrophy and sarcopenia. The origin of adipocytes seen in skeletal muscle is mesenchymal progenitor cells that can give rise to both adipocytes and fibroblasts. In the present study, we demonstrated that siRNA-mediated suppression of MyoD expression in rat skeletal muscle progenitor cell culture, which comprises both myogenic satellite cells and mesenchymal progenitor cells, resulted in diminished myotube formation and an unexpected spontaneous appearance of white adipocytes. Suppressing myomaker expression also resulted in complete absence of myotube formation without reducing MyoD expression, but no adipogenesis was seen in this scenario, indicating that decline in MyoD expression rather than decreased myotube formation is necessary to induce adipogenesis. In addition, spontaneous adipogenesis induced by suppressing MyoD expression in culture was inhibited by the conditioned medium from control culture, indicating that anti-adipogenic factor(s) are secreted from MyoD-positive myogenic cells. These results indicate the presence of regulatory mechanism on adipogenesis by myogenic cells.
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Affiliation(s)
- Keitaro Yamanouchi
- Laboratory of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Katsuyuki Nakamura
- Laboratory of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Shiho Takeuchi
- Laboratory of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Tohru Hosoyama
- Department of Musculoskeletal Disease, The Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Takashi Matsuwaki
- Laboratory of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
| | - Masugi Nishihara
- Laboratory of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Taetzsch T, Shapiro D, Eldosougi R, Myers T, Settlage RE, Valdez G. The microRNA miR-133b functions to slow Duchenne muscular dystrophy pathogenesis. J Physiol 2021; 599:171-192. [PMID: 32991751 PMCID: PMC8418193 DOI: 10.1113/jp280405] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 09/14/2020] [Indexed: 01/22/2023] Open
Abstract
KEY POINTS Impairment of muscle biogenesis contributes to the progression of Duchenne muscular dystrophy (DMD). As a muscle enriched microRNA that has been implicated in muscle biogenesis, the role of miR-133b in DMD remains unknown. To assess miR-133b function in DMD-affected skeletal muscles, we genetically ablated miR-133b in the mdx mouse model of DMD. We show that deletion of miR-133b exacerbates the dystrophic phenotype of DMD-afflicted skeletal muscle by dysregulating muscle stem cells involved in muscle biogenesis, in addition to affecting signalling pathways related to inflammation and fibrosis. Our results provide evidence that miR-133b may underlie DMD pathology by affecting the proliferation and differentiation of muscle stem cells. ABSTRACT Duchenne muscular dystrophy (DMD) is characterized by progressive skeletal muscle degeneration. No treatments are currently available to prevent the disease. While the muscle enriched microRNA miR-133b has been implicated in muscle biogenesis, its role in DMD remains unknown. To assess miR-133b function in DMD-affected skeletal muscles, we genetically ablated miR-133b in the mdx mouse model of DMD. In the absence of miR-133b, the tibialis anterior muscle of P30 mdx mice is smaller in size and exhibits a thickened interstitial space containing more mononucleated cells. Additional analysis revealed that miR-133b deletion influences muscle fibre regeneration, satellite cell proliferation and differentiation, and induces widespread transcriptomic changes in mdx muscle. These include known miR-133b targets as well as genes involved in cell proliferation and fibrosis. Altogether, our data demonstrate that skeletal muscles utilize miR-133b to mitigate the deleterious effects of DMD.
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Affiliation(s)
- Thomas Taetzsch
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA
| | - Dillon Shapiro
- Molecular Biology, Cell Biology, & Biochemistry Graduate Program, Brown University, Providence, RI, USA
| | - Randa Eldosougi
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, USA
| | - Tracey Myers
- Fralin Biomedical Research Institute at Virginia Tech Carilion, Roanoke, VA, USA
| | | | - Gregorio Valdez
- Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI, USA
- Center for Translational Neuroscience, Robert J. and Nancy D. Carney Institute for Brain Science and Brown Institute for Translational Science, Brown University, Providence, United States
- Department of Neurology, Warren Alpert Medical School of Brown University, Providence, United States
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Vogel P, Ding ZM, Read R, DaCosta CM, Hansard M, Small DL, Ye GL, Hansen G, Brommage R, Powell DR. Progressive Degenerative Myopathy and Myosteatosis in ASNSD1-Deficient Mice. Vet Pathol 2020; 57:723-735. [PMID: 32638637 DOI: 10.1177/0300985820939251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mice with an inactivating mutation in the gene encoding asparagine synthetase domain containing 1 (ASNSD1) develop a progressive degenerative myopathy that results in severe sarcopenia and myosteatosis. ASNSD1 is conserved across many species, and whole body gene expression surveys show maximal expression levels of ASNSD1 in skeletal muscle. However, potential functions of this protein have not been previously reported. Asnsd1-/- mice demonstrated severe muscle weakness, and their normalized body fat percentage on both normal chow and high fat diets was greater than 2 SD above the mean for 3651 chow-fed and 2463 high-fat-diet-fed knockout (KO) lines tested. Histologic lesions were essentially limited to the muscle and were characterized by a progressive degenerative myopathy with extensive transdifferentiation and replacement of muscle by well-differentiated adipose tissue. There was minimal inflammation, fibrosis, and muscle regeneration associated with this myopathy. In addition, the absence of any signs of lipotoxicity in Asnsd1-/- mice despite their extremely elevated body fat percentage and low muscle mass suggests a role for metabolic dysfunctions in the development of this phenotype. Asnsd1-/- mice provide the first insight into the function of this protein, and this mouse model could prove useful in elucidating fundamental metabolic interactions between skeletal muscle and adipose tissue.
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Affiliation(s)
- Peter Vogel
- 57636Lexicon Pharmaceuticals Inc, The Woodlands, TX, USA
| | - Zhi-Ming Ding
- 57636Lexicon Pharmaceuticals Inc, The Woodlands, TX, USA
| | - Robert Read
- 57636Lexicon Pharmaceuticals Inc, The Woodlands, TX, USA
| | | | | | - Daniel L Small
- 57636Lexicon Pharmaceuticals Inc, The Woodlands, TX, USA
| | - Gui-Lan Ye
- 57636Lexicon Pharmaceuticals Inc, The Woodlands, TX, USA
| | - Gwenn Hansen
- 57636Lexicon Pharmaceuticals Inc, The Woodlands, TX, USA
| | | | - David R Powell
- 57636Lexicon Pharmaceuticals Inc, The Woodlands, TX, USA
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Marchesi J, Ibelli A, Peixoto J, Cantão M, Pandolfi J, Marciano C, Zanella R, Settles M, Coutinho L, Ledur M. Whole transcriptome analysis of the pectoralis major muscle reveals molecular mechanisms involved with white striping in broiler chickens. Poult Sci 2019; 98:590-601. [DOI: 10.3382/ps/pey429] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 08/23/2018] [Indexed: 01/10/2023] Open
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Valencia AP, Lai JK, Iyer SR, Mistretta KL, Spangenburg EE, Davis DL, Lovering RM, Gilotra MN. Fatty Infiltration Is a Prognostic Marker of Muscle Function After Rotator Cuff Tear. Am J Sports Med 2018; 46:2161-2169. [PMID: 29750541 PMCID: PMC6397750 DOI: 10.1177/0363546518769267] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND Massive rotator cuff tears (RCTs) begin as primary tendon injuries and cause a myriad of changes in the muscle, including atrophy, fatty infiltration (FI), and fibrosis. However, it is unclear which changes are most closely associated with muscle function. PURPOSE To determine if FI of the supraspinatus muscle after acute RCT relates to short-term changes in muscle function. STUDY DESIGN Controlled laboratory study. METHODS Unilateral RCTs were induced in female rabbits via tenotomy of the supraspinatus and infraspinatus. Maximal isometric force and rate of fatigue were measured in the supraspinatus in vivo at 6 and 12 weeks after tenotomy. Computed tomography scanning was performed, followed by histologic analysis of myofiber size, FI, and fibrosis. RESULTS Tenotomy resulted in supraspinatus weakness, reduced myofiber size, FI, and fibrosis, but no differences were evident between 6 and 12 weeks after tenotomy except for increased collagen content at 12 weeks. FI was a predictor of supraspinatus weakness and was strongly correlated to force, even after accounting for muscle cross-sectional area. While muscle atrophy accounted for the loss in force in tenotomized muscles with minimal FI, it did not account for the greater loss in force in tenotomized muscles with the most FI. Collagen content was not strongly correlated with maximal isometric force, even when normalized to muscle size. CONCLUSION After RCT, muscle atrophy results in the loss of contractile force from the supraspinatus, but exacerbated weakness is observed with increased FI. Therefore, the level of FI can help predict contractile function of torn rotator cuff muscles. CLINICAL RELEVANCE Markers to predict contractile function of RCTs will help determine the appropriate treatment to improve functional recovery after RCTs.
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Affiliation(s)
- Ana P. Valencia
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
- Department of Kinesiology, School of Public Health, University of Maryland, Baltimore, Maryland, USA
| | - Jim K. Lai
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Shama R. Iyer
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Katherine L. Mistretta
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Espen E. Spangenburg
- Department of Physiology, East Carolina Diabetes and Obesity Institute, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Derik L. Davis
- Department of Diagnostic Radiology and Nuclear Medicine, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Richard M. Lovering
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
- Department of Physiology, School of Medicine, University of Maryland, Baltimore, Maryland, USA
| | - Mohit N. Gilotra
- Department of Orthopaedics, School of Medicine, University of Maryland, Baltimore, Maryland, USA
- Department of Orthopaedics, Baltimore Veteran Affairs Medical Center, Baltimore, Maryland, USA
- Address correspondence to Mohit N. Gilotra, MD, Department of Orthopaedics, School of Medicine and VA Maryland Health Care System, University of Maryland, AHB, Rm 540, 100 Penn St, Baltimore, MD 21201, USA ()
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Gibbons MC, Singh A, Engler AJ, Ward SR. The role of mechanobiology in progression of rotator cuff muscle atrophy and degeneration. J Orthop Res 2018; 36:546-556. [PMID: 28755470 PMCID: PMC5788743 DOI: 10.1002/jor.23662] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Accepted: 07/24/2017] [Indexed: 02/06/2023]
Abstract
Rotator cuff (RC) muscles undergo several detrimental changes following mechanical unloading resulting from RC tendon tear. In this review, we highlight the pathological causes and consequences of mechanical alterations at the whole muscle, muscle fiber, and muscle resident cell level as they relate to RC disease progression. In brief, the altered mechanical loads associated with RC tear lead to architectural, structural, and compositional changes at the whole-muscle and muscle fiber level. At the cellular level, these changes equate to direct disruption of mechanobiological signaling, which is exacerbated by mechanically regulated biophysical and biochemical changes to the cellular and extra-cellular environment (also known as the stem cell "niche"). Together, these data have important implications for both pre-clinical models and clinical practice. In pre-clinical models, it is important to recapitulate both the atrophic and degenerative muscle loss found in humans using clinically relevant modes of injury. Clinically, understanding the mechanics and underlying biology of the muscle will impact both surgical decision-making and rehabilitation protocols, as interventions that may be good for atrophic muscle will have a detrimental effect on degenerating muscle, and vice versa. © 2017 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 36:546-556, 2018.
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Affiliation(s)
| | | | - Adam J Engler
- University of California San Diego Department of Bioengineering
| | - Samuel R Ward
- University of California Department of Orthopedic Surgery,University of California Department of Radiology
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12
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Flück M, Ruoss S, Möhl CB, Valdivieso P, Benn MC, von Rechenberg B, Laczko E, Hu J, Wieser K, Meyer DC, Gerber C. Genomic and lipidomic actions of nandrolone on detached rotator cuff muscle in sheep. J Steroid Biochem Mol Biol 2017; 165:382-395. [PMID: 27523963 DOI: 10.1016/j.jsbmb.2016.08.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 08/05/2016] [Accepted: 08/08/2016] [Indexed: 01/06/2023]
Abstract
Reversal of fatty infiltration of pennate rotator cuff muscle after tendon release is hitherto impossible. The administration of nandrolone starting at the time of tendon release prevents the increase in fat content, but does not revert established fatty infiltration. We hypothesised that tendon release and myotendinous retraction cause alterations in lipid related gene expression leading to fatty muscle infiltration, which can be suppressed by nandrolone through its genomic actions if applied immediately after tendon release. The effects of infraspinatus tendon release and subsequent tendon repair at 16 weeks were studied in six Swiss Alpine sheep. In the interventional groups, 150mg nandrolone was administered weekly after tendon release until sacrifice (N22W, n=6) or starting at the time of repair (N6W, n=6). Infraspinatus volume, composition, expressed transcripts, lipids, and selected proteins were analyzed at baseline, 16 and 22 weeks. Tendon release reduced infraspinatus volume by 22% and increased fat content from 11% to 38%. These changes were not affected by repair. Fatty infiltration was associated with up-regulation of 227 lipid species, and increased levels of the adipocyte differentiation marker PPARG2 (peroxisome proliferator-activated receptor gamma 2). Nandrolone abrogated lipid accumulation, halved the loss in fiber area percentage, and up-regulated androgen receptor levels and transcript expression in the N22W but not the N6W group. The results document that nandrolone mitigates muscle-to-fat transformation after tendon release via a general down-regulation of lipid accumulation concomitantly with up-regulated expression of its nuclear receptor and downstream transcripts in skeletal muscle. Reduced responsiveness of retracted muscle to nandrolone as observed in the N6W group is reflected by a down-regulated transcript response.
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Affiliation(s)
- Martin Flück
- Laboratory for Muscle Plasticity, Department of Orthopedics, University of Zurich, Balgrist Campus, Zurich, Switzerland.
| | - Severin Ruoss
- Laboratory for Muscle Plasticity, Department of Orthopedics, University of Zurich, Balgrist Campus, Zurich, Switzerland
| | - Christoph B Möhl
- Laboratory for Muscle Plasticity, Department of Orthopedics, University of Zurich, Balgrist Campus, Zurich, Switzerland
| | - Paola Valdivieso
- Laboratory for Muscle Plasticity, Department of Orthopedics, University of Zurich, Balgrist Campus, Zurich, Switzerland
| | - Mario C Benn
- Musculoskeletal Research Unit, Center for Applied Biotechnology and Molecular Medicine, Equine Department, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Brigitte von Rechenberg
- Musculoskeletal Research Unit, Center for Applied Biotechnology and Molecular Medicine, Equine Department, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Endre Laczko
- Functional Genomics Center Zurich (FGCZ), ETH and University of Zurich, Switzerland
| | - Junmin Hu
- Functional Genomics Center Zurich (FGCZ), ETH and University of Zurich, Switzerland
| | - Karl Wieser
- Balgrist University Hospital, Department of Orthopedics, Zurich, Switzerland
| | - Dominik C Meyer
- Balgrist University Hospital, Department of Orthopedics, Zurich, Switzerland
| | - Christian Gerber
- Balgrist University Hospital, Department of Orthopedics, Zurich, Switzerland
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13
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Shook B, Rivera Gonzalez G, Ebmeier S, Grisotti G, Zwick R, Horsley V. The Role of Adipocytes in Tissue Regeneration and Stem Cell Niches. Annu Rev Cell Dev Biol 2016; 32:609-631. [PMID: 27146311 PMCID: PMC5157158 DOI: 10.1146/annurev-cellbio-111315-125426] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Classically, white adipose tissue (WAT) was considered an inert component of connective tissue but is now appreciated as a major regulator of metabolic physiology and endocrine homeostasis. Recent work defining how WAT develops and expands in vivo emphasizes the importance of specific locations of WAT or depots in metabolic regulation. Interestingly, mature white adipocytes are integrated into several tissues. A new perspective regarding the in vivo regulation and function of WAT in these tissues has highlighted an essential role of adipocytes in tissue homeostasis and regeneration. Finally, there has been significant progress in understanding how mature adipocytes regulate the pathology of several diseases. In this review, we discuss these novel roles of WAT in the homeostasis and regeneration of epithelial, muscle, and immune tissues and how they contribute to the pathology of several disorders.
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Affiliation(s)
- Brett Shook
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520;
| | - Guillermo Rivera Gonzalez
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520;
| | - Sarah Ebmeier
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520;
| | | | - Rachel Zwick
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520;
| | - Valerie Horsley
- Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, Connecticut 06520;
- Department of Dermatology, Yale University, New Haven, Connecticut 06520
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14
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Hamrick MW, McGee-Lawrence ME, Frechette DM. Fatty Infiltration of Skeletal Muscle: Mechanisms and Comparisons with Bone Marrow Adiposity. Front Endocrinol (Lausanne) 2016; 7:69. [PMID: 27379021 PMCID: PMC4913107 DOI: 10.3389/fendo.2016.00069] [Citation(s) in RCA: 238] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 06/07/2016] [Indexed: 12/11/2022] Open
Abstract
Skeletal muscle and bone share common embryological origins from mesodermal cell populations and also display common growth trajectories early in life. Moreover, muscle and bone are both mechanoresponsive tissues, and the mass and strength of both tissues decline with age. The decline in muscle and bone strength that occurs with aging is accompanied in both cases by an accumulation of adipose tissue. In bone, adipocyte (AC) accumulation occurs in the marrow cavities of long bones and is known to increase with estrogen deficiency, mechanical unloading, and exposure to glucocorticoids. The factors leading to accumulation of intra- and intermuscular fat (myosteatosis) are less well understood, but recent evidence indicates that increases in intramuscular fat are associated with disuse, altered leptin signaling, sex steroid deficiency, and glucocorticoid treatment, factors that are also implicated in bone marrow adipogenesis. Importantly, accumulation of ACs in skeletal muscle and accumulation of intramyocellular lipid are linked to loss of muscle strength, reduced insulin sensitivity, and increased mortality among the elderly. Resistance exercise and whole body vibration can prevent fatty infiltration in skeletal muscle and also improve muscle strength. Therapeutic strategies to prevent myosteatosis may improve muscle function and reduce fall risk in the elderly, potentially impacting the incidence of bone fracture.
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Affiliation(s)
- Mark W. Hamrick
- Department of Cellular Biology and Anatomy, Medical College of Georgia, Augusta, GA, USA
- *Correspondence: Mark W. Hamrick,
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15
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Arrighi N, Moratal C, Clément N, Giorgetti-Peraldi S, Peraldi P, Loubat A, Kurzenne JY, Dani C, Chopard A, Dechesne CA. Characterization of adipocytes derived from fibro/adipogenic progenitors resident in human skeletal muscle. Cell Death Dis 2015; 6:e1733. [PMID: 25906156 PMCID: PMC4650547 DOI: 10.1038/cddis.2015.79] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 02/16/2015] [Accepted: 02/18/2015] [Indexed: 01/09/2023]
Abstract
A population of fibro/adipogenic but non-myogenic progenitors located between skeletal muscle fibers was recently discovered. The aim of this study was to determine the extent to which these progenitors differentiate into fully functional adipocytes. The characterization of muscle progenitor-derived adipocytes is a central issue in understanding muscle homeostasis. They are considered as being the cellular origin of intermuscular adipose tissue that develops in several pathophysiological situations. Here fibro/adipogenic progenitors were isolated from a panel of 15 human muscle biopsies on the basis of the specific cell-surface immunophenotype CD15+/PDGFRα+CD56−. This allowed investigations of their differentiation into adipocytes and the cellular functions of terminally differentiated adipocytes. Adipogenic differentiation was found to be regulated by the same effectors as those regulating differentiation of progenitors derived from white subcutaneous adipose tissue. Similarly, basic adipocyte functions, such as triglyceride synthesis and lipolysis occurred at levels similar to those observed with subcutaneous adipose tissue progenitor-derived adipocytes. However, muscle progenitor-derived adipocytes were found to be insensitive to insulin-induced glucose uptake, in association with the impairment of phosphorylation of key insulin-signaling effectors. Our findings indicate that muscle adipogenic progenitors give rise to bona fide white adipocytes that have the unexpected feature of being insulin-resistant.
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Affiliation(s)
- N Arrighi
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] CNRS, UMR7277, F-06108 Nice, France [3] INSERM U1091, F-06108 Nice, France
| | - C Moratal
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] CNRS, UMR7277, F-06108 Nice, France [3] INSERM U1091, F-06108 Nice, France
| | - N Clément
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] CNRS, UMR7277, F-06108 Nice, France [3] INSERM U1091, F-06108 Nice, France
| | - S Giorgetti-Peraldi
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] INSERM U 1065, Mediterranean Research Centre for Molecular Medicine, Team: Cellular and Molecular Physiopathology of Obesity and Diabetes, Nice, France
| | - P Peraldi
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] CNRS, UMR7277, F-06108 Nice, France [3] INSERM U1091, F-06108 Nice, France
| | - A Loubat
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] CNRS, UMR7277, F-06108 Nice, France [3] INSERM U1091, F-06108 Nice, France
| | - J-Y Kurzenne
- Hôpitaux Pédiatriques de Nice CHU-Lenval, Nice, France
| | - C Dani
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] CNRS, UMR7277, F-06108 Nice, France [3] INSERM U1091, F-06108 Nice, France
| | - A Chopard
- UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France
| | - C A Dechesne
- 1] UFR Sciences, Université Nice Sophia Antipolis, Nice F-06108, France [2] CNRS, UMR7277, F-06108 Nice, France [3] INSERM U1091, F-06108 Nice, France
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16
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Effects of 17β-estradiol and progesterone on the production of adipokines in differentiating 3T3-L1 adipocytes: Role of Rho-kinase. Cytokine 2015; 72:130-4. [DOI: 10.1016/j.cyto.2014.12.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Revised: 12/08/2014] [Accepted: 12/26/2014] [Indexed: 12/20/2022]
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17
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Grounds MD, Terrill JR, Radley-Crabb HG, Robertson T, Papadimitriou J, Spuler S, Shavlakadze T. Lipid accumulation in dysferlin-deficient muscles. THE AMERICAN JOURNAL OF PATHOLOGY 2014; 184:1668-76. [PMID: 24685690 DOI: 10.1016/j.ajpath.2014.02.005] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 02/21/2014] [Accepted: 02/25/2014] [Indexed: 02/01/2023]
Abstract
Dysferlin is a membrane associated protein involved in vesicle trafficking and fusion. Defects in dysferlin result in limb-girdle muscular dystrophy type 2B and Miyoshi myopathy in humans and myopathy in A/J(dys-/-) and BLAJ mice, but the pathomechanism of the myopathy is not understood. Oil Red O staining showed many lipid droplets within the psoas and quadriceps muscles of dysferlin-deficient A/J(dys-/-) mice aged 8 and 12 months, and lipid droplets were also conspicuous within human myofibers from patients with dysferlinopathy (but not other myopathies). Electron microscopy of 8-month-old A/J(dys-/-) psoas muscles confirmed lipid droplets within myofibers and showed disturbed architecture of myofibers. In addition, the presence of many adipocytes was confirmed, and a possible role for dysferlin in adipocytes is suggested. Increased expression of mRNA for a gene involved in early lipogenesis, CCAAT/enhancer binding protein-δ, in 3-month-old A/J(dys-/-) quadriceps (before marked histopathology is evident), indicates early induction of lipogenesis/adipogenesis within dysferlin-deficient muscles. Similar results were seen for dysferlin-deficient BLAJ mice. These novel observations of conspicuous intermyofibrillar lipid and progressive adipocyte replacement in dysferlin-deficient muscles present a new focus for investigating the mechanisms that result in the progressive decline of muscle function in dysferlinopathies.
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Affiliation(s)
- Miranda D Grounds
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia.
| | - Jessica R Terrill
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia
| | - Hannah G Radley-Crabb
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia; CHIRI Biosciences Research Precinct, School of Biomedical Sciences, Curtin University, Perth, Australia
| | - Terry Robertson
- Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - John Papadimitriou
- Pathology and Laboratory Medicine, University of Western Australia, Perth, Australia
| | - Simone Spuler
- Muscle Research Unit, Experimental and Clinical Research Center, Berlin, Germany
| | - Tea Shavlakadze
- Schools of Anatomy, Physiology and Human Biology, University of Western Australia, Perth, Australia
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18
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Nakamura K, Yamanouchi K, Nishihara M. Secreted protein acidic and rich in cysteine internalization and its age-related alterations in skeletal muscle progenitor cells. Aging Cell 2014; 13:175-84. [PMID: 24245505 PMCID: PMC4326877 DOI: 10.1111/acel.12168] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/27/2013] [Indexed: 01/06/2023] Open
Abstract
Aging causes phenotypic changes in skeletal muscle progenitor cells (Skm-PCs), such as reduced myogenesis and increased adipogenesis due to alterations in their environment or niche. Secreted protein acidic and rich in cysteine (SPARC), which is secreted into the niche of Skm-PCs, inhibits adipogenesis and promotes myogenesis. We have previously reported that Skm-PC responsiveness to SPARC declines with age, although the mechanism underlying this decline is unknown. In this study, we found that SPARC is internalized by Skm-PCs and that this uptake increases with age. Internalization is dependent on integrin-α5, a cell surface SPARC-binding molecule, and clathrin-mediated endocytosis. We also demonstrated that internalized SPARC is transported to Rab7-positive endosomes. Skm-PCs from old rats exhibited increased clathrin expression and decreased Rab7 expression exclusively in MyoD-negative cells. In loss-of-function analyses, clathrin knockdown increased the anti-adipogenic effect of SPARC, whereas Rab7 knockdown reduced it, indicating that alterations in SPARC internalization may mediate the age-related decline in its anti-adipogenic effect. These results provide insights into age-related SPARC resistance in Skm-PCs, which may lead to sarcopenia.
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Affiliation(s)
- Katsuyuki Nakamura
- Department of Veterinary Physiology; Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - Keitaro Yamanouchi
- Department of Veterinary Physiology; Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
| | - Masugi Nishihara
- Department of Veterinary Physiology; Graduate School of Agricultural and Life Sciences; The University of Tokyo; 1-1-1 Yayoi Bunkyo-ku Tokyo 113-8657 Japan
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19
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Yang QY, Liang JF, Rogers CJ, Zhao JX, Zhu MJ, Du M. Maternal obesity induces epigenetic modifications to facilitate Zfp423 expression and enhance adipogenic differentiation in fetal mice. Diabetes 2013; 62:3727-35. [PMID: 23884886 PMCID: PMC3806589 DOI: 10.2337/db13-0433] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Maternal obesity (MO) predisposes offspring to obesity and type 2 diabetes despite poorly defined mechanisms. Zfp423 is the key transcription factor committing cells to the adipogenic lineage, with exceptionally dense CpG sites in its promoter. We hypothesized that MO enhances adipogenic differentiation during fetal development through inducing epigenetic changes in the Zfp423 promoter and elevating its expression. Female mice were subjected to a control (Con) or obesogenic (OB) diet for 2 months, mated, and maintained on their diets during pregnancy. Fetal tissue was harvested at embryonic day 14.5 (E14.5), when the early adipogenic commitment is initiated. The Zfp423 expression was 3.6-fold higher and DNA methylation in the Zfp423 promoter was lower in OB compared with Con. Correspondingly, repressive histone methylation (H3K27me3) was lower in the Zfp423 promoter of OB fetal tissue, accompanied by reduced binding of enhancer of zeste 2 (EZH2). Gain- and loss-of-function analysis showed that Zfp423 regulates early adipogenic differentiation in fetal progenitor cells. In summary, MO enhanced Zfp423 expression and adipogenic differentiation during fetal development, at least partially through reducing DNA methylation in the Zfp423 promoter, which is expected to durably elevate adipogenic differentiation of progenitor cells in adult tissue, programming adiposity and metabolic dysfunction later in life.
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Affiliation(s)
- Qi-Yuan Yang
- Department of Animal Sciences, Washington State University, Pullman, Washington
- Developmental Biology Group, Department of Animal Science, University of Wyoming, Laramie, Wyoming
| | - Jun-Fang Liang
- Department of Animal Sciences, Washington State University, Pullman, Washington
| | - Carl J. Rogers
- Department of Animal Sciences, Washington State University, Pullman, Washington
| | - Jun-Xing Zhao
- Developmental Biology Group, Department of Animal Science, University of Wyoming, Laramie, Wyoming
| | - Mei-Jun Zhu
- Developmental Biology Group, Department of Animal Science, University of Wyoming, Laramie, Wyoming
- School of Food Science, Washington State University, Pullman, Washington
| | - Min Du
- Department of Animal Sciences, Washington State University, Pullman, Washington
- Developmental Biology Group, Department of Animal Science, University of Wyoming, Laramie, Wyoming
- Corresponding author: Min Du,
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20
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Mu X, Usas A, Tang Y, Lu A, Wang B, Weiss K, Huard J. RhoA mediates defective stem cell function and heterotopic ossification in dystrophic muscle of mice. FASEB J 2013; 27:3619-31. [PMID: 23704088 DOI: 10.1096/fj.13-233460] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Heterotopic ossification (HO) and fatty infiltration (FI) often occur in diseased skeletal muscle and have been previously described in various animal models of Duchenne muscular dystrophy (DMD); however, the pathological mechanisms remain largely unknown. Dystrophin-deficient mdx mice and dystrophin/utrophin double-knockout (dKO) mice are mouse models of DMD; however, mdx mice display a strong muscle regeneration capacity, while dKO mice exhibit a much more severe phenotype, which is similar to patients with DMD. Our results revealed that more extensive HO, but not FI, occurred in the skeletal muscle of dKO mice versus mdx mice, and RhoA activation specifically occurred at the sites of HO. Moreover, the gene expression of RhoA, BMPs, and several inflammatory factors were significantly up-regulated in muscle stem cells isolated from dKO mice; while inactivation of RhoA in the cells with RhoA/ROCK inhibitor Y-27632 led to reduced osteogenic potential and improved myogenic potential. Finally, inactivation of RhoA signaling in the dKO mice with Y-27632 improved muscle regeneration and reduced the expression of BMPs, inflammation, HO, and intramyocellular lipid accumulation in both skeletal and cardiac muscle. Our results revealed that RhoA represents a major molecular switch in the regulation of HO and muscle regeneration in dystrophic skeletal muscle of mice.
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Affiliation(s)
- Xiaodong Mu
- Stem Cell Research Center, Department of Orthopaedic Surgery, University of Pittsburgh, 450 Technology Dr., Pittsburgh, PA 15219, USA
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21
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Kuttappan VA, Huff GR, Huff WE, Hargis BM, Apple JK, Coon C, Owens CM. Comparison of hematologic and serologic profiles of broiler birds with normal and severe degrees of white striping in breast fillets. Poult Sci 2013; 92:339-45. [PMID: 23300298 DOI: 10.3382/ps.2012-02647] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
White striping is the white striation occasionally observed parallel to the direction of muscle fibers in broiler breast fillets and thighs at the processing plant. Broiler breast fillets can be categorized as normal (NORM), moderate (MOD), or severe (SEV) based on the degree of white striping. Histologically, SEV fillets are characterized by the highest degree of degeneration of muscle fibers along with fibrosis and lipidosis when compared with NORM. The present study was undertaken to compare the hematologic and serologic profiles of broilers with NORM and SEV degrees of white striping to get more information on the systemic changes associated with the condition. Day-old male broiler chicks of a commercial strain were grown on the same diet in 6 replicate pens (n = 32 birds/pen). Blood samples (5 mL) were collected from the wing vein of each bird on the day before processing for analyzing hematologic and serologic profiles. At 63 d, the birds were weighed and processed in a commercial inline processing system. Weight of the butterfly fillets, liver, and abdominal fat pad were recorded. Left-side fillets were scored to obtain the degree of white striping for each bird. Representative samples for NORM (n = 24) and SEV (n = 17) categories were selected to compare the hematologic and serologic profiles. The SEV birds had greater (P < 0.05) live, fillet, and liver weights, as well as fillet yield, compared with the NORM birds, but the abdominal fat yield was less (P < 0.05) in SEV birds. The NORM and SEV birds did not show any differences in various hematological parameters, including the differential leukocyte count. Conversely, SEV birds had elevated (P < 0.05) serum levels of creatine kinase, alanine transaminase, aspartate aminotransferase, and lactate dehydrogenase. These results suggest that there is no systemic infectious or inflammatory condition associated with a SEV degree of white striping. The elevated serum enzyme levels confirm the muscle damage associated with the degenerative myopathy in SEV birds.
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Affiliation(s)
- V A Kuttappan
- Poultry Science Department, University of Arkansas Division of Agriculture, Fayetteville 72701, USA
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22
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Kuttappan V, Shivaprasad H, Shaw D, Valentine B, Hargis B, Clark F, McKee S, Owens C. Pathological changes associated with white striping in broiler breast muscles. Poult Sci 2013; 92:331-8. [DOI: 10.3382/ps.2012-02646] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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23
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Kuttappan V, Brewer V, Apple J, Waldroup P, Owens C. Influence of growth rate on the occurrence of white striping in broiler breast fillets. Poult Sci 2012; 91:2677-85. [DOI: 10.3382/ps.2012-02259] [Citation(s) in RCA: 168] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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24
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Nakamura K, Nakano SI, Miyoshi T, Yamanouchi K, Matsuwaki T, Nishihara M. Age-related resistance of skeletal muscle-derived progenitor cells to SPARC may explain a shift from myogenesis to adipogenesis. Aging (Albany NY) 2012; 4:40-8. [PMID: 22289652 PMCID: PMC3292904 DOI: 10.18632/aging.100426] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Aging causes phenotypic changes in skeletal muscle progenitor cells (SMPCs) that lead to the loss of myogenicity and adipogenesis. Secreted protein acidic and rich in cysteine (SPARC), which is secreted from SMPCs, stimulates myogenesis and inhibits adipogenesis. The present study aimed to examine whether changes in SPARC expression, its signaling pathway, or both are involved in age-related phenotypic changes in SMPCs. SPARC expression levels were comparable in SMPCs derived from young and old rats. However, when SPARC expression was reduced by a SPARC-specific siRNA, SMPCs from young rats showed reduced myogenesis and increased adipogenesis. In striking contrast, old rats showed little changes in these functions. Recombinant SPARC was effective in inhibiting adipogenesis and promoting myogenesis of SMPCs from young rats but had no effect on SMPCs from old rats when endogenous SPARC levels were reduced by the SPARC-siRNA. Further, the level of integrin α5, a subunit of the putative SPARC receptor, was decreased in SMPCs from old rats, and its inhibition in SMPCs from young rats by siRNA reduced adipogenesis in response to SPARC. These results suggest that, although SPARC plays a role in regulating SMPC function, SMPCs become refractory to the action of SPARC with age. Our data may explain an age-related shift from myogenesis to adipogenesis, associated with sarcopenia.
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Affiliation(s)
- Katsuyuki Nakamura
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-8657, Japan
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25
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Laron D, Samagh SP, Liu X, Kim HT, Feeley BT. Muscle degeneration in rotator cuff tears. J Shoulder Elbow Surg 2012; 21:164-74. [PMID: 22244059 DOI: 10.1016/j.jse.2011.09.027] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 09/21/2011] [Accepted: 09/24/2011] [Indexed: 02/01/2023]
Abstract
Rotator cuff tears are among the most common injuries seen by orthopedic surgeons. Although small- and medium-sized tears do well after arthroscopic and open repair, large and massive tears have been shown to develop marked muscle atrophy and fatty infiltration within the rotator cuff muscles. These pathologic changes have been found to be independent predictors of failed surgical repair with poor functional outcomes. To understand the pathophysiology of rotator cuff disease, we must first develop an understanding of the changes that occur within the cuff muscles themselves. The purpose of this review is to summarize the molecular pathways behind muscular degeneration and emphasize new findings related to the clinical relevance of muscle atrophy and fatty infiltration seen with rotator cuff tears. Understanding these molecular pathways will help guide further research and treatment options that can aim to alter expression of these pathways and improve outcomes after surgical repair of massive rotator cuff tears.
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Affiliation(s)
- Dominique Laron
- Department of Orthopaedic Surgery, University of California, San Francisco, San Francisco, CA 94158, USA
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26
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Murakami Y, Yada E, Nakano SI, Miyagoe-Suzuki Y, Hosoyama T, Matsuwaki T, Yamanouchi K, Nishihara M. Establishment of bipotent progenitor cell clone from rat skeletal muscle. Anim Sci J 2011; 82:764-72. [PMID: 22111633 DOI: 10.1111/j.1740-0929.2011.00907.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The present study describes the isolation, cloning and characterization of adipogenic progenitor cells from rat skeletal muscle. Among the obtained 10 clones, the most highly adipogenic progenitor, 2G11 cells, were further characterized. In addition to their adipogenicity, 2G11 cells retain myogenic potential as revealed by formation of multinucleated myotubes when co-cultured with myoblasts. 2G11 cells were resistant to an inhibitory effect of basic fibroblast growth factor on adipogenesis, while adipogenesis of widely used preadipogenic cell line, 3T3-L1 cells, was suppressed almost completely by the same treatment. In vivo transplantation experiments revealed that 2G11 cells are able to possess both adipogenicity and myogenicity in vivo. These results indicate the presence of bipotent progenitor cells in rat skeletal muscle, and suggest that such cells may contribute to ectopic fat formation in skeletal muscle.
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Affiliation(s)
- Yousuke Murakami
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Tokyo, Japan
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Leblanc E, Trensz F, Haroun S, Drouin G, Bergeron E, Penton CM, Montanaro F, Roux S, Faucheux N, Grenier G. BMP-9-induced muscle heterotopic ossification requires changes to the skeletal muscle microenvironment. J Bone Miner Res 2011; 26:1166-77. [PMID: 21611960 DOI: 10.1002/jbmr.311] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Heterotopic ossification (HO) is defined as the formation of bone inside soft tissue. Symptoms include joint stiffness, swelling, and pain. Apart from the inherited form, the common traumatic form generally occurs at sites of injury in damaged muscles and is often associated with brain injury. We investigated bone morphogenetic protein 9 (BMP-9), which possesses a strong osteoinductive capacity, for its involvement in muscle HO physiopathology. We found that BMP-9 had an osteoinductive influence on mouse muscle resident stromal cells by increasing their alkaline phosphatase activity and bone-specific marker expression. Interestingly, BMP-9 induced HO only in damaged muscle, whereas BMP-2 promoted HO in skeletal muscle regardless of its state. The addition of the soluble form of the ALK1 protein (the BMP-9 receptor) significantly inhibited the osteoinductive potential of BMP-9 in cells and HO in damaged muscles. BMP-9 thus should be considered a candidate for involvement in HO physiopathology, with its activity depending on the skeletal muscle microenvironment.
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Hosoyama T, Nishijo K, Prajapati SI, Li G, Keller C. Rb1 gene inactivation expands satellite cell and postnatal myoblast pools. J Biol Chem 2011; 286:19556-64. [PMID: 21478154 DOI: 10.1074/jbc.m111.229542] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Satellite cells are well known as a postnatal skeletal muscle stem cell reservoir that under injury conditions participate in repair. However, mechanisms controlling satellite cell quiescence and activation are the topic of ongoing inquiry by many laboratories. In this study, we investigated whether loss of the cell cycle regulatory factor, pRb, is associated with the re-entry of quiescent satellite cells into replication and subsequent stem cell expansion. By ablation of Rb1 using a Pax7CreER,Rb1 conditional mouse line, satellite cell number was increased 5-fold over 6 months. Furthermore, myoblasts originating from satellite cells lacking Rb1 were also increased 3-fold over 6 months, while terminal differentiation was greatly diminished. Similarly, Pax7CreER,Rb1 mice exhibited muscle fiber hypotrophy in vivo under steady state conditions as well as a delay of muscle regeneration following cardiotoxin-mediated injury. These results suggest that cell cycle re-entry of quiescent satellite cells is accelerated by lack of Rb1, resulting in the expansion of both satellite cells and their progeny in adolescent muscle. Conversely, that sustained Rb1 loss in the satellite cell lineage causes a deficit of muscle fiber formation. However, we also show that pharmacological inhibition of protein phosphatase 1 activity, which will result in pRb inactivation accelerates satellite cell activation and/or expansion in a transient manner. Together, our results raise the possibility that reversible pRb inactivation in satellite cells and inhibition of protein phosphorylation may provide a new therapeutic tool for muscle atrophy by short term expansion of the muscle stem cells and myoblast pool.
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Affiliation(s)
- Tohru Hosoyama
- Greehey Children's Cancer Research Institute, University of Texas Health Science Center, San Antonio, Texas 78229, USA
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29
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Differentially expressed proteins during fat accumulation in bovine skeletal muscle. Meat Sci 2010; 86:814-20. [DOI: 10.1016/j.meatsci.2010.07.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2010] [Revised: 06/19/2010] [Accepted: 07/03/2010] [Indexed: 11/20/2022]
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30
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Shibata S, Ueno C, Ito T, Yamanouchi K, Matsuwaki T, Nishihara M. Skeletal muscle growth defect in human growth hormone transgenic rat is accompanied by phenotypic changes in progenitor cells. AGE (DORDRECHT, NETHERLANDS) 2010; 32:239-253. [PMID: 20431991 PMCID: PMC2861751 DOI: 10.1007/s11357-010-9130-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2009] [Accepted: 01/04/2010] [Indexed: 05/29/2023]
Abstract
Growth hormone (GH) is known to have a pivotal role in the maintenance of skeletal muscle mass. Sarcopenia, the loss of skeletal muscle mass, is a common phenomenon in aging, and it is widely accepted that sarcopenia is largely attributed to age-related decline in GH secretion. In the present study, we tested if human growth hormone transgenic rats (GH-TG rats) whose plasma GH levels are maintained relatively low could be an appropriate model for sarcopenia. Analyses of GH-TG rats revealed that they exhibit skeletal muscle growth defect as well as atrophy of myofibers. The number of myofibers in tibialis anterior muscle was comparable to that of WT rats, while the proportion of type I slow myofibers in tibialis anterior muscle was increased in GH-TG rats after 5 months. Neither increased expression of ubiquitin ligases, MuRF1 and MAFbx, nor indication of apoptotic cell death was observed. Notably, myogenic differentiation potential of skeletal muscle progenitor cells in GH-TG rats was lower than WT rats, and this was accompanied by increased adipogenic potential. These results indicate that GH-TG rats could be a useful model to elucidate the mechanism of sarcopenia induced by reduced GH action and raised the possibility that decreased GH action may cause an alteration of differentiation potential of skeletal muscle progenitor cells.
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Affiliation(s)
- Shingo Shibata
- Department of Veterinary Physiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657 Japan
| | - Chiori Ueno
- Department of Veterinary Physiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657 Japan
| | - Tsuyoshi Ito
- Department of Veterinary Pathology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657 Japan
| | - Keitaro Yamanouchi
- Department of Veterinary Physiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657 Japan
| | - Takashi Matsuwaki
- Department of Veterinary Physiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657 Japan
| | - Masugi Nishihara
- Department of Veterinary Physiology, The University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657 Japan
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Yamanouchi K, Hosoyama T, Murakami Y, Nakano SI, Nishihara M. Satellite cell differentiation in goat skeletal muscle single fiber culture. J Reprod Dev 2009; 55:252-5. [PMID: 19234370 DOI: 10.1262/jrd.20175] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Satellite cells are skeletal muscle progenitor/stem cells that reside between the basal lamina and plasma membranes of skeletal muscle fibers in vivo and can give rise to both myogenic and adipogenic cells. The isolated skeletal muscle single fiber culture is an in vitro model that has the advantage of enabling the researcher to monitor the differentiation of satellite cells in a closer microenvironment found in living muscle in vivo. The aim of the present study was to establish single fiber culture of goat skeletal muscle and monitor satellite cell differentiation in this system. Fine single fibers were isolated from goat intercostal muscle by enzymatic treatment, and satellite cells on the fibers were analyzed immunocytochemically. Satellite cells on freshly isolated fibers were positive for Pax7, but negative for MyoD and myogenin, indicating that they are quiescent. As the culture period progressed, the satellite cells became positive for myogenic markers MyoD and myogenin. The satellite cells that detached from the fiber and migrated onto the culture dish were positive for both MyoD and myogenin, and some of them formed multinucleated myosin heavy chain-positive myotubes. In addition, hypercontraction of isolated fine fibers induced adipogenic differentiation of satellite cells. The present study is the first to describe establishment of a goat skeletal muscle single fiber culture that can be used as a model system for further studies on satellite cell behavior in ruminants.
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Affiliation(s)
- Keitaro Yamanouchi
- Department of Veterinary Physiology, Graduate School of Agricultural and Life Sciences, The University of Tokyo.
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