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Espino-Gonzalez E, Dalbram E, Mounier R, Gondin J, Farup J, Jessen N, Treebak JT. Impaired skeletal muscle regeneration in diabetes: From cellular and molecular mechanisms to novel treatments. Cell Metab 2024; 36:1204-1236. [PMID: 38490209 DOI: 10.1016/j.cmet.2024.02.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 01/10/2024] [Accepted: 02/22/2024] [Indexed: 03/17/2024]
Abstract
Diabetes represents a major public health concern with a considerable impact on human life and healthcare expenditures. It is now well established that diabetes is characterized by a severe skeletal muscle pathology that limits functional capacity and quality of life. Increasing evidence indicates that diabetes is also one of the most prevalent disorders characterized by impaired skeletal muscle regeneration, yet underlying mechanisms and therapeutic treatments remain poorly established. In this review, we describe the cellular and molecular alterations currently known to occur during skeletal muscle regeneration in people with diabetes and animal models of diabetes, including its associated comorbidities, e.g., obesity, hyperinsulinemia, and insulin resistance. We describe the role of myogenic and non-myogenic cell types on muscle regeneration in conditions with or without diabetes. Therapies for skeletal muscle regeneration and gaps in our knowledge are also discussed, while proposing future directions for the field.
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Affiliation(s)
- Ever Espino-Gonzalez
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Emilie Dalbram
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark
| | - Rémi Mounier
- Institut NeuroMyoGène, Unité Physiopathologie et Génétique du Neurone et du Muscle, Université Claude Bernard Lyon 1, CNRS UMR 5261, Inserm U1315, Univ Lyon, Lyon, France
| | - Julien Gondin
- Institut NeuroMyoGène, Unité Physiopathologie et Génétique du Neurone et du Muscle, Université Claude Bernard Lyon 1, CNRS UMR 5261, Inserm U1315, Univ Lyon, Lyon, France
| | - Jean Farup
- Department of Biomedicine, Aarhus University, Aarhus 8000, Denmark; Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus 8200, Denmark
| | - Niels Jessen
- Department of Biomedicine, Aarhus University, Aarhus 8000, Denmark; Steno Diabetes Center Aarhus, Aarhus University Hospital, Aarhus 8200, Denmark; Department of Clinical Pharmacology, Aarhus University Hospital, Aarhus 8200, Denmark
| | - Jonas T Treebak
- Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 2200, Denmark.
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Flores-Opazo M, Kopinke D, Helmbacher F, Fernández-Verdejo R, Tuñón-Suárez M, Lynch GS, Contreras O. Fibro-adipogenic progenitors in physiological adipogenesis and intermuscular adipose tissue remodeling. Mol Aspects Med 2024; 97:101277. [PMID: 38788527 DOI: 10.1016/j.mam.2024.101277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 04/27/2024] [Accepted: 05/13/2024] [Indexed: 05/26/2024]
Abstract
Excessive accumulation of intermuscular adipose tissue (IMAT) is a common pathological feature in various metabolic and health conditions and can cause muscle atrophy, reduced function, inflammation, insulin resistance, cardiovascular issues, and unhealthy aging. Although IMAT results from fat accumulation in muscle, the mechanisms underlying its onset, development, cellular components, and functions remain unclear. IMAT levels are influenced by several factors, such as changes in the tissue environment, muscle type and origin, extent and duration of trauma, and persistent activation of fibro-adipogenic progenitors (FAPs). FAPs are a diverse and transcriptionally heterogeneous population of stromal cells essential for tissue maintenance, neuromuscular stability, and tissue regeneration. However, in cases of chronic inflammation and pathological conditions, FAPs expand and differentiate into adipocytes, resulting in the development of abnormal and ectopic IMAT. This review discusses the role of FAPs in adipogenesis and how they remodel IMAT. It highlights evidence supporting FAPs and FAP-derived adipocytes as constituents of IMAT, emphasizing their significance in adipose tissue maintenance and development, as well as their involvement in metabolic disorders, chronic pathologies and diseases. We also investigated the intricate molecular pathways and cell interactions governing FAP behavior, adipogenesis, and IMAT accumulation in chronic diseases and muscle deconditioning. Finally, we hypothesize that impaired cellular metabolic flexibility in dysfunctional muscles impacts FAPs, leading to IMAT. A deeper understanding of the biology of IMAT accumulation and the mechanisms regulating FAP behavior and fate are essential for the development of new therapeutic strategies for several debilitating conditions.
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Affiliation(s)
| | - Daniel Kopinke
- Department of Pharmacology and Therapeutics, University of Florida, Gainesville, 32610, FL, USA; Myology Institute, University of Florida College of Medicine, Gainesville, FL, USA.
| | | | - Rodrigo Fernández-Verdejo
- Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA, USA; Laboratorio de Fisiología Del Ejercicio y Metabolismo (LABFEM), Escuela de Kinesiología, Facultad de Medicina, Universidad Finis Terrae, Chile.
| | - Mauro Tuñón-Suárez
- Laboratorio de Fisiología Del Ejercicio y Metabolismo (LABFEM), Escuela de Kinesiología, Facultad de Medicina, Universidad Finis Terrae, Chile.
| | - Gordon S Lynch
- Centre for Muscle Research, Department of Anatomy and Physiology, The University of Melbourne, Melbourne, Victoria, Parkville 3010, Australia.
| | - Osvaldo Contreras
- Developmental and Regenerative Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, NSW, 2010, Australia; School of Clinical Medicine, UNSW Sydney, Kensington, NSW 2052, Australia.
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Norris AM, Fierman KE, Campbell J, Pitale R, Shahraj M, Kopinke D. Studying intramuscular fat deposition and muscle regeneration: insights from a comparative analysis of mouse strains, injury models, and sex differences. Skelet Muscle 2024; 14:12. [PMID: 38812056 PMCID: PMC11134715 DOI: 10.1186/s13395-024-00344-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 05/13/2024] [Indexed: 05/31/2024] Open
Abstract
Intramuscular fat (IMAT) infiltration, pathological adipose tissue that accumulates between muscle fibers, is a shared hallmark in a diverse set of diseases including muscular dystrophies and diabetes, spinal cord and rotator cuff injuries, as well as sarcopenia. While the mouse has been an invaluable preclinical model to study skeletal muscle diseases, they are also resistant to IMAT formation. To better understand this pathological feature, an adequate pre-clinical model that recapitulates human disease is necessary. To address this gap, we conducted a comprehensive in-depth comparison between three widely used mouse strains: C57BL/6J, 129S1/SvlmJ and CD1. We evaluated the impact of strain, sex and injury type on IMAT formation, myofiber regeneration and fibrosis. We confirm and extend previous findings that a Glycerol (GLY) injury causes significantly more IMAT and fibrosis compared to Cardiotoxin (CTX). Additionally, females form more IMAT than males after a GLY injury, independent of strain. Of all strains, C57BL/6J mice, both females and males, are the most resistant to IMAT formation. In regard to injury-induced fibrosis, we found that the 129S strain formed the least amount of scar tissue. Surprisingly, C57BL/6J of both sexes demonstrated complete myofiber regeneration, while both CD1 and 129S1/SvlmJ strains still displayed smaller myofibers 21 days post injury. In addition, our data indicate that myofiber regeneration is negatively correlated with IMAT and fibrosis. Combined, our results demonstrate that careful consideration and exploration are needed to determine which injury type, mouse model/strain and sex to utilize as preclinical model especially for modeling IMAT formation.
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Affiliation(s)
- Alessandra M Norris
- Department of Pharmacology and Therapeutics, Myology Institute, University of Florida, Gainesville, FL, USA
| | - Kiara E Fierman
- Department of Pharmacology and Therapeutics, Myology Institute, University of Florida, Gainesville, FL, USA
| | - Jillian Campbell
- Department of Pharmacology and Therapeutics, Myology Institute, University of Florida, Gainesville, FL, USA
| | - Rhea Pitale
- Department of Pharmacology and Therapeutics, Myology Institute, University of Florida, Gainesville, FL, USA
| | - Muhammad Shahraj
- Department of Pharmacology and Therapeutics, Myology Institute, University of Florida, Gainesville, FL, USA
| | - Daniel Kopinke
- Department of Pharmacology and Therapeutics, Myology Institute, University of Florida, Gainesville, FL, USA.
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Takahashi Y, Fujita H, Seino Y, Hattori S, Hidaka S, Miyakawa T, Suzuki A, Waki H, Yabe D, Seino Y, Yamada Y. Gastric inhibitory polypeptide receptor antagonism suppresses intramuscular adipose tissue accumulation and ameliorates sarcopenia. J Cachexia Sarcopenia Muscle 2023; 14:2703-2718. [PMID: 37897141 PMCID: PMC10751449 DOI: 10.1002/jcsm.13346] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 08/10/2023] [Accepted: 09/11/2023] [Indexed: 10/29/2023] Open
Abstract
BACKGROUND Intramuscular adipose tissue (IMAT) formation derived from muscle fibro-adipogenic progenitors (FAPs) has been recognized as a pathological feature of sarcopenia. This study aimed to explore whether genetic and pharmacological gastric inhibitory polypeptide (GIP) receptor antagonism suppresses IMAT accumulation and ameliorates sarcopenia in mice. METHODS Whole body composition, grip strength, skeletal muscle weight, tibialis anterior (TA) muscle fibre cross-sectional area (CSA) and TA muscle IMAT area were measured in young and aged male C57BL/6 strain GIP receptor (Gipr)-knockout (Gipr-/- ) and wild-type (Gipr+/+ ) mice. FAPs isolated from lower limb muscles of 12-week-old Gipr+/+ mice were cultured with GIP, and their differentiation into mature adipocytes was examined. Furthermore, TA muscle IMAT area and fibre CSA were measured in untreated Gipr-/- mice and GIP receptor antagonist-treated Gipr+/+ mice after glycerol injection into the TA muscles. RESULTS Body composition analysis revealed that 104-week-old Gipr-/- mice had a greater proportion of lean tissue mass (73.7 ± 1.2% vs. 66.5 ± 2.7%, P < 0.05 vs. 104-week-old Gipr+/+ mice) and less adipose tissue mass (13.1 ± 1.3% vs. 19.4 ± 2.6%, P < 0.05 vs. 104-week-old Gipr+/+ mice). Eighty-four-week-old Gipr-/- mice exhibited increases in grip strength (P < 0.05), weights of TA (P < 0.05), soleus (P < 0.01), gastrocnemius (P < 0.05) and quadriceps femoris (P < 0.01) muscles, and average TA muscle fibre CSA (P < 0.05) along with a reduction in TA muscle IMAT area assessed by the number of perilipin-positive cells (P < 0.0001) compared with 84-week-old Gipr+/+ mice. Oil Red O staining analysis revealed 1.6- and 1.7-fold increased adipogenesis in muscle FAPs cultured with 10 and 100 nM of GIP (P < 0.01 and P < 0.001 vs. 0 nM of GIP, respectively). Furthermore, both untreated Gipr-/- mice and GIP receptor antagonist-treated Gipr+/+ mice for 14 days after glycerol injection into the TA muscles at 12 weeks of age showed reduced TA muscle IMAT area (1.39 ± 0.38% and 2.65 ± 0.36% vs. 6.54 ± 1.30%, P < 0.001 and P < 0.01 vs. untreated Gipr+/+ mice, respectively) and increased average TA muscle fibre CSA (P < 0.01 and P < 0.05 vs. untreated Gipr+/+ mice, respectively). CONCLUSIONS GIP promotes the differentiation of muscle FAPs into adipocytes and its receptor antagonism suppresses IMAT accumulation and promotes muscle regeneration. Pharmacological GIP receptor antagonism may serve as a novel therapeutic approach for sarcopenia.
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Affiliation(s)
- Yuya Takahashi
- Department of Metabolism and EndocrinologyAkita University Graduate School of MedicineAkitaJapan
| | - Hiroki Fujita
- Department of Metabolism and EndocrinologyAkita University Graduate School of MedicineAkitaJapan
| | - Yusuke Seino
- Department of Endocrinology, Diabetes and MetabolismFujita Health UniversityToyoakeJapan
- Yutaka Seino Distinguished Center for Diabetes ResearchKansai Electric Power Medical Research InstituteKyotoJapan
| | - Satoko Hattori
- Division of Systems Medical Science, Center for Medical ScienceFujita Health UniversityToyoakeJapan
| | - Shihomi Hidaka
- Department of Endocrinology, Diabetes and MetabolismFujita Health UniversityToyoakeJapan
| | - Tsuyoshi Miyakawa
- Division of Systems Medical Science, Center for Medical ScienceFujita Health UniversityToyoakeJapan
| | - Atsushi Suzuki
- Department of Endocrinology, Diabetes and MetabolismFujita Health UniversityToyoakeJapan
| | - Hironori Waki
- Department of Metabolism and EndocrinologyAkita University Graduate School of MedicineAkitaJapan
| | - Daisuke Yabe
- Yutaka Seino Distinguished Center for Diabetes ResearchKansai Electric Power Medical Research InstituteKyotoJapan
- Department of Diabetes, Endocrinology and Metabolism/Department of Rheumatology and Clinical ImmunologyGifu University Graduate School of MedicineGifuJapan
- Center for One Medicine Innovative Translational ResearchGifu UniversityGifuJapan
| | - Yutaka Seino
- Yutaka Seino Distinguished Center for Diabetes ResearchKansai Electric Power Medical Research InstituteKyotoJapan
- Center for Diabetes, Endocrinology and MetabolismKansai Electric Power HospitalOsakaJapan
| | - Yuichiro Yamada
- Yutaka Seino Distinguished Center for Diabetes ResearchKansai Electric Power Medical Research InstituteKyotoJapan
- Center for Diabetes, Endocrinology and MetabolismKansai Electric Power HospitalOsakaJapan
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Wang L, Feng J, Deng Y, Yang Q, Wei Q, Ye D, Rong X, Guo J. CCAAT/Enhancer-Binding Proteins in Fibrosis: Complex Roles Beyond Conventional Understanding. RESEARCH (WASHINGTON, D.C.) 2022; 2022:9891689. [PMID: 36299447 PMCID: PMC9575473 DOI: 10.34133/2022/9891689] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 09/18/2022] [Indexed: 07/29/2023]
Abstract
CCAAT/enhancer-binding proteins (C/EBPs) are a family of at least six identified transcription factors that contain a highly conserved basic leucine zipper domain and interact selectively with duplex DNA to regulate target gene expression. C/EBPs play important roles in various physiological processes, and their abnormal function can lead to various diseases. Recently, accumulating evidence has demonstrated that aberrant C/EBP expression or activity is closely associated with the onset and progression of fibrosis in several organs and tissues. During fibrosis, various C/EBPs can exert distinct functions in the same organ, while the same C/EBP can exert distinct functions in different organs. Modulating C/EBP expression or activity could regulate various molecular processes to alleviate fibrosis in multiple organs; therefore, novel C/EBPs-based therapeutic methods for treating fibrosis have attracted considerable attention. In this review, we will explore the features of C/EBPs and their critical functions in fibrosis in order to highlight new avenues for the development of novel therapies targeting C/EBPs.
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Affiliation(s)
- Lexun Wang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jiaojiao Feng
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yanyue Deng
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Qianqian Yang
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Quxing Wei
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Dewei Ye
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xianglu Rong
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jiao Guo
- Guangdong Metabolic Diseases Research Center of Integrated Chinese and Western Medicine, China
- Key Laboratory of Glucolipid Metabolic Disorder, Ministry of Education of China, China
- Guangdong Key Laboratory of Metabolic Disease Prevention and Treatment of Traditional Chinese Medicine, China
- Institute of Chinese Medicine, Guangdong Pharmaceutical University, Guangzhou, China
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Ghnaimawi S, Zhang S, Baum JI, Huang Y. The Effects of Maternal Intake of EPA and DHA Enriched Diet During Pregnancy and Lactation on Offspring’s Muscle Development and Energy Homeostasis. Front Physiol 2022; 13:881624. [PMID: 35733999 PMCID: PMC9207413 DOI: 10.3389/fphys.2022.881624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 05/04/2022] [Indexed: 11/13/2022] Open
Abstract
EPA and DHA are n-3 long-chain polyunsaturated fatty acids with a diversity of health benefits on offspring. The objective of this study was to test the in vivo effect of maternal ingestion of EPA and DHA on fetal and offspring muscle development and energy balance. Two groups of female C57BL/6 mice were fed EPA and DHA enriched diet (FA) and diet devoid of EPA and DHA (CON) respectively throughout the entire period of gestation and lactation. Embryos at E13 and offspring at age of D1 and D21 were selected for sample collection and processing. No change in birth number and body weight were observed between groups at D1 and D21. Transient increase in the expression levels of myogenesis regulating genes was detected at D1 (p < 0.05) in FA group. Most of the expression of muscle protein synthesis regulating genes were comparable (p > 0.05) between FA and CON groups at D1 and D21. The significant increase in MHC4, and IGF-1 was not linked to increased muscle mass. A persistent increase in ISR expression (p < 0.05) but not in GLUT-4 (p > 0.05) was detected in offspring. Up-regulation of adipogenesis regulating genes was accompanied by increasing intramuscular fat accumulation in the offspring of FA group. Considerable increase in transcripts of genes regulating lipid catabolism and thermogenesis in liver (p < 0.05) was noticed in FA group at D21; whereas, only the levels of carnitine palmitoyl transferase 1A (Cpt1α) and Enoyl-CoA Hydratase And 3-Hydroxyacyl CoA Dehydrogenase (Ehhadh) increased at D1. Similarly, genes regulating lipolysis were highly expressed at D21 in FA group. EPA and DHA treatment promoted BAT development and activity by increasing the expression of BAT signature genes (p < 0.05). Also, maternal intake of EPA and DHA enriched diet enhanced browning of sWAT. Taken together, maternal ingestion of EPA/DHA may be suggested as a therapeutic option to improve body composition and counteract childhood obesity- related metabolic disorders and confer lifelong positive metabolic impact on offspring.
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Affiliation(s)
- Saeed Ghnaimawi
- Medical Laboratory Techniques Department, Kut University College, Alkut, Iraq
| | - Shilei Zhang
- College of Animal Science and Technology, Shihezi University, Shihezi, China
| | - Jamie I. Baum
- Department of Food Science, Division of Agriculture, University of Arkansas, Fayetteville, AR, United States
| | - Yan Huang
- Department of Animal Science, Division of Agriculture, University of Arkansas, Fayetteville, AR, United States
- *Correspondence: Yan Huang, , orcid.org/0000-0001-9464-6889
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Nassar R, Vernus B, Carnac G, Fouret G, Goustard B, Casas F, Tintignac L, Cassar-Malek I, Picard B, Seiliez I, Brioche T, Koechlin-Ramonatxo C, Bertrand-Gaday C, Hamade A, Najjar F, Chabi B, Bonnieu A. Myostatin gene inactivation increases post-mortem calpain-dependent muscle proteolysis in mice. Meat Sci 2021; 185:108726. [PMID: 34973590 DOI: 10.1016/j.meatsci.2021.108726] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/17/2021] [Accepted: 12/19/2021] [Indexed: 12/13/2022]
Abstract
Myostatin deficiency leads to extensive skeletal muscle hypertrophy, but its consequence on post-mortem muscle proteolysis is unknown. Here, we compared muscle myofibrillar protein degradation, and autophagy, ubiquitin-proteasome and Ca2+-dependent proteolysis relative to the energetic and redox status in wild-type (WT) and myostatin knock-out mice (KO) during early post-mortem storage. KO muscles showed higher degradation of myofibrillar proteins in the first 24 h after death, associated with preserved antioxidant status, compared with WT muscles. Analysis of key autophagy and ubiquitin-proteasome system markers indicated that these two pathways were not upregulated in post-mortem muscle (both genotypes), but basal autophagic flux and ATP content were lower in KO muscles. Proteasome and caspase activities were not different between WT and KO mice. Conversely, calpain activity was higher in KO muscles, concomitantly with higher troponin T and desmin degradation. Altogether, these results suggest that calpains but not the autophagy, proteasome and caspase systems, explain the difference in post-mortem muscle protein proteolysis between both genotypes.
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Affiliation(s)
- Rim Nassar
- DMEM, University of Montpellier, INRAE, Montpellier, France; Laboratoire d'Innovation thérapeutique, Lebanese University, Beyrouth, Liban
| | - Barbara Vernus
- DMEM, University of Montpellier, INRAE, Montpellier, France
| | - Gilles Carnac
- PHYMEDEXP, University of Montpellier, CNRS, INSERM, CHRU, Montpellier, France
| | - Gilles Fouret
- DMEM, University of Montpellier, INRAE, Montpellier, France
| | | | - François Casas
- DMEM, University of Montpellier, INRAE, Montpellier, France
| | - Lionel Tintignac
- Département de Biomédecine, Basel University, Basel, Switzerland
| | - Isabelle Cassar-Malek
- University Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genès-Champanelle, France
| | - Brigitte Picard
- University Clermont Auvergne, INRAE, VetAgro Sup, UMR Herbivores, F-63122 Saint-Genès-Champanelle, France
| | - Iban Seiliez
- Université de Pau et des Pays de l'Adour, E2S UPPA, INRAE, UMR1419 Nutrition Métabolisme et Aquaculture, F-64310 Saint-Pée-sur-Nivelle, France
| | - Thomas Brioche
- DMEM, University of Montpellier, INRAE, Montpellier, France
| | | | | | - Aline Hamade
- Laboratoire d'Innovation thérapeutique, Lebanese University, Beyrouth, Liban
| | - Fadia Najjar
- Laboratoire d'Innovation thérapeutique, Lebanese University, Beyrouth, Liban
| | - Béatrice Chabi
- DMEM, University of Montpellier, INRAE, Montpellier, France
| | - Anne Bonnieu
- DMEM, University of Montpellier, INRAE, Montpellier, France.
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8
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Jo B, Morimoto Y, Takeuchi S. Skeletal muscle-adipose cocultured tissue fabricated using cell-laden microfibers and a hydrogel sheet. Biotechnol Bioeng 2021; 119:636-643. [PMID: 34761805 DOI: 10.1002/bit.27989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/09/2021] [Accepted: 11/03/2021] [Indexed: 02/06/2023]
Abstract
The emerging interest in skeletal muscle tissue originates from its unique properties that control body movements. In particular, recent research advances in engineered skeletal muscle tissue have broadened the possibilities of applications in nonclinical models. However, due to the lack of adipose tissue, current engineered skeletal muscle tissue has the limitation of satisfying in vivo-like position and proportion of intermuscular fat. Adipose tissue within the skeletal muscle affects their functional properties. Here, a fabrication method for cocultured tissue composed of skeletal muscle and adipose tissues is proposed to reproduce the functional and morphological characteristics of muscle. By implementing prematured adipose microfibers in a myoblast-laden hydrogel sheet, both the accumulation of large lipid droplets and control of the position of adipose tissue within the skeletal muscle tissue becomes feasible. The findings of this study provide helpful information regarding engineered skeletal muscle, which has strong potential in drug screening models.
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Affiliation(s)
- Byeongwook Jo
- Department of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Yuya Morimoto
- Department of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Shoji Takeuchi
- Department of Mechano-Informatics, Graduate School of Information Science and Technology, The University of Tokyo, Tokyo, Japan.,Institute of Industrial Science, The University of Tokyo, Tokyo, Japan.,International Research for Center for Neurointelligence (WPI-IRCN), The University of Tokyo Institutes for Advanced Study, The University of Tokyo, Tokyo, Japan
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9
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Cussonneau L, Boyer C, Brun C, Deval C, Loizon E, Meugnier E, Gueret E, Dubois E, Taillandier D, Polge C, Béchet D, Gauquelin-Koch G, Evans AL, Arnemo JM, Swenson JE, Blanc S, Simon C, Lefai E, Bertile F, Combaret L. Concurrent BMP Signaling Maintenance and TGF-β Signaling Inhibition Is a Hallmark of Natural Resistance to Muscle Atrophy in the Hibernating Bear. Cells 2021; 10:cells10081873. [PMID: 34440643 PMCID: PMC8393865 DOI: 10.3390/cells10081873] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/14/2021] [Accepted: 07/20/2021] [Indexed: 12/17/2022] Open
Abstract
Muscle atrophy arises from a multiplicity of physio-pathological situations and has very detrimental consequences for the whole body. Although knowledge of muscle atrophy mechanisms keeps growing, there is still no proven treatment to date. This study aimed at identifying new drivers for muscle atrophy resistance. We selected an innovative approach that compares muscle transcriptome between an original model of natural resistance to muscle atrophy, the hibernating brown bear, and a classical model of induced atrophy, the unloaded mouse. Using RNA sequencing, we identified 4415 differentially expressed genes, including 1746 up- and 2369 down-regulated genes, in bear muscles between the active versus hibernating period. We focused on the Transforming Growth Factor (TGF)-β and the Bone Morphogenetic Protein (BMP) pathways, respectively, involved in muscle mass loss and maintenance. TGF-β- and BMP-related genes were overall down- and up-regulated in the non-atrophied muscles of the hibernating bear, respectively, and the opposite occurred for the atrophied muscles of the unloaded mouse. This was further substantiated at the protein level. Our data suggest TGF-β/BMP balance is crucial for muscle mass maintenance during long-term physical inactivity in the hibernating bear. Thus, concurrent activation of the BMP pathway may potentiate TGF-β inhibiting therapies already targeted to prevent muscle atrophy.
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Affiliation(s)
- Laura Cussonneau
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
- Correspondence: (L.C.); (L.C.); Tel.: +(33)4-7362-4824 (Lydie Combaret)
| | - Christian Boyer
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
| | - Charlotte Brun
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France; (C.B.); (S.B.); (F.B.)
| | - Christiane Deval
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
| | - Emmanuelle Loizon
- CarMen Laboratory, INSERM 1060, INRAE 1397, University of Lyon, F-69600 Oullins, France; (E.L.); (E.M.); (C.S.)
| | - Emmanuelle Meugnier
- CarMen Laboratory, INSERM 1060, INRAE 1397, University of Lyon, F-69600 Oullins, France; (E.L.); (E.M.); (C.S.)
| | - Elise Gueret
- Institut de Génomique Fonctionnelle (IGF), University Montpellier, CNRS, INSERM, 34094 Montpellier, France; (E.G.); (E.D.)
- Montpellier GenomiX, France Génomique, 34095 Montpellier, France
| | - Emeric Dubois
- Institut de Génomique Fonctionnelle (IGF), University Montpellier, CNRS, INSERM, 34094 Montpellier, France; (E.G.); (E.D.)
- Montpellier GenomiX, France Génomique, 34095 Montpellier, France
| | - Daniel Taillandier
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
| | - Cécile Polge
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
| | - Daniel Béchet
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
| | | | - Alina L. Evans
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Campus Evenstad, NO-2480 Koppang, Norway; (A.L.E.); (J.M.A.)
| | - Jon M. Arnemo
- Department of Forestry and Wildlife Management, Inland Norway University of Applied Sciences, Campus Evenstad, NO-2480 Koppang, Norway; (A.L.E.); (J.M.A.)
- Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden
| | - Jon E. Swenson
- Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, NO-1432 Ås, Norway;
| | - Stéphane Blanc
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France; (C.B.); (S.B.); (F.B.)
| | - Chantal Simon
- CarMen Laboratory, INSERM 1060, INRAE 1397, University of Lyon, F-69600 Oullins, France; (E.L.); (E.M.); (C.S.)
| | - Etienne Lefai
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
| | - Fabrice Bertile
- Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France; (C.B.); (S.B.); (F.B.)
| | - Lydie Combaret
- INRAE, Unité de Nutrition Humaine, Université Clermont Auvergne, UMR 1019, F-63000 Clermont-Ferrand, France; (C.B.); (C.D.); (D.T.); (C.P.); (D.B.); (E.L.)
- Correspondence: (L.C.); (L.C.); Tel.: +(33)4-7362-4824 (Lydie Combaret)
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10
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Bourdier P, Birat A, Rochette E, Doré É, Courteix D, Dutheil F, Pereira B, Ratel S, Merlin E, Duché P. Muscle function and architecture in children with juvenile idiopathic arthritis. Acta Paediatr 2021; 110:280-287. [PMID: 32420673 DOI: 10.1111/apa.15335] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2019] [Revised: 04/21/2020] [Accepted: 04/28/2020] [Indexed: 11/30/2022]
Abstract
AIM To assess muscle function and functional abilities in children with juvenile idiopathic arthritis (JIA). METHODS Fourteen children with JIA and 14 healthy controls matched for age and sex were included. Muscle characteristics, both structural (thickness, cross-sectional area (CSA) and fascicle angle) and qualitative (intermuscular adipose tissue; IMAT), were assessed in thigh muscles using ultrasound and peripheral quantitative computed tomography (pQCT). Muscle function and functional abilities were determined from the assessment of maximal voluntary isometric contraction (MVIC) knee extensors force and vertical jump performance. RESULTS No significant difference in MVIC force was observed between the two groups. However, squat jump height was significantly reduced in children with JIA (18.3 ± 5.4 vs 24.3 ± 7.9 cm, P < .05). No differences in structural parameters were observed, but IMAT/CSA (0.22 ± 0.02 vs 0.25 ± 0.03; P = .01) was significantly lower in children with JIA than in healthy children. CONCLUSION Knee extensor muscle architecture and force were comparable between children with and without JIA, but functional abilities (vertical jump performance) were poorer in JIA. The lower IMAT area in JIA could result from a lower physical activity level compared with healthy children.
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Affiliation(s)
- Pierre Bourdier
- Laboratoire AME2P Université Clermont Auvergne Clermont‐Ferrand France
| | - Anthony Birat
- Laboratoire AME2P Université Clermont Auvergne Clermont‐Ferrand France
| | - Emmanuelle Rochette
- INSERM, CIC 1405, Unité CRECHE, CHU Clermont‐Ferrand Université Clermont Auvergne Clermont‐Ferrand France
- CHU Clermont‐Ferrand Clermont‐Ferrand France
- Laboratoire IAPS Université de Toulon Toulon France
| | - Éric Doré
- Laboratoire AME2P Université Clermont Auvergne Clermont‐Ferrand France
| | - Daniel Courteix
- Laboratoire AME2P Université Clermont Auvergne Clermont‐Ferrand France
| | - Frédéric Dutheil
- CNRS Laboratoire de Psychologie Sociale et Cognitive (LaPSCo) UCA‐CNRS 6024, CHU Université Clermont Auvergne Clermont–Ferrand France
- Faculty of Health School of Exercise Science Australian Catholic University Melbourne Vic. Australia
| | | | - Sébastien Ratel
- Laboratoire AME2P Université Clermont Auvergne Clermont‐Ferrand France
| | - Etienne Merlin
- INSERM, CIC 1405, Unité CRECHE, CHU Clermont‐Ferrand Université Clermont Auvergne Clermont‐Ferrand France
- CHU Clermont‐Ferrand Clermont‐Ferrand France
- INRA, UMR 1019 UNH, ECREIN Université Clermont Auvergne Clermont‐Ferrand France
| | - Pascale Duché
- Laboratoire AME2P Université Clermont Auvergne Clermont‐Ferrand France
- Laboratoire IAPS Université de Toulon Toulon France
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11
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Bagchi DP, MacDougald OA. Identification and Dissection of Diverse Mouse Adipose Depots. J Vis Exp 2019. [PMID: 31355801 DOI: 10.3791/59499] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Adipose tissues are complex organs with a wide array of functions, including storage and mobilization of energy in response to local and global needs, uncoupling of metabolism to generate heat, and secretion of adipokines to regulate whole-body homeostasis and immune responses. Emerging research is identifying important regional differences in the developmental, molecular, and functional profiles of adipocytes located in discrete depots throughout the body. Different properties of the depots are medically relevant since metabolic diseases often demonstrate depot-specific effects. This protocol will provide investigators with a detailed anatomic atlas and dissection guide for the reproducible and accurate identification and excision of diverse mouse adipose tissues. Standardized dissection of discrete adipose depots will allow detailed comparisons of their molecular and metabolic characteristics and contributions to local and systemic pathologic states under various nutritional and environmental conditions.
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Affiliation(s)
- Devika P Bagchi
- Department of Molecular & Integrative Physiology, University of Michigan Medical School;
| | - Ormond A MacDougald
- Department of Molecular & Integrative Physiology, University of Michigan Medical School
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12
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Mori da Cunha MGMC, Hympanova L, Rynkevic R, Mes T, Bosman AW, Deprest J. Biomechanical Behaviour and Biocompatibility of Ureidopyrimidinone-Polycarbonate Electrospun and Polypropylene Meshes in a Hernia Repair in Rabbits. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E1174. [PMID: 30974868 PMCID: PMC6480159 DOI: 10.3390/ma12071174] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/04/2019] [Accepted: 04/09/2019] [Indexed: 12/29/2022]
Abstract
Although mesh use has significantly improved the outcomes of hernia and pelvic organ prolapse repair, long-term recurrence rates remain unacceptably high. We aim to determine the in vivo degradation and functional outcome of reconstructed abdominal wall defects, using slowly degradable electrospun ureidopyrimidinone moieties incorporated into a polycarbonate backbone (UPy-PC) implant compared to an ultra-lightweight polypropylene (PP) textile mesh with high pore stability. Twenty four New-Zealand rabbits were implanted with UPy-PC or PP to either reinforce a primary fascial defect repair or to cover (referred to as gap bridging) a full-thickness abdominal wall defect. Explants were harvested at 30, 90 and 180 days. The primary outcome measure was uniaxial tensiometry. Secondary outcomes were the recurrence of herniation, morphometry for musculofascial tissue characteristics, inflammatory response and neovascularization. PP explants compromised physiological abdominal wall compliance from 90 days onwards and UPy-PC from 180 days. UPy-PC meshes induced a more vigorous inflammatory response than PP at all time points. We observed progressively more signs of muscle atrophy and intramuscular fatty infiltration in the entire explant area for both mesh types. UPy-PC implants are replaced by a connective tissue stiff enough to prevent abdominal wall herniation in two-thirds of the gap-bridged full-thickness abdominal wall defects. However, in one-third there was sub-clinical herniation. The novel electrospun material did slightly better than the textile PP yet outcomes were still suboptimal. Further research should investigate what drives muscular atrophy, and whether novel polymers would eventually generate a physiological neotissue and can prevent failure and/or avoid collateral damage.
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Affiliation(s)
| | - Lucie Hympanova
- (A.W.B.).
- Department of Development and Regeneration, Woman and Child, Group Biomedical Sciences, KU Leuven, 3000 Leuven, Belgium.
- Institute for the Care of Mother and Child, Third Faculty of Medicine, Charles University, 14700 Prague, Czech Republic.
| | - Rita Rynkevic
- (A.W.B.).
- Department of Development and Regeneration, Woman and Child, Group Biomedical Sciences, KU Leuven, 3000 Leuven, Belgium.
- INEGI, Faculdade de Engenharia da Universidade do Porto, Universidade do Porto, 4099-002 Porto, Portugal.
| | - Tristan Mes
- SupraPolix BV, 5611 Eindhoven, The Netherlands.
| | | | - Jan Deprest
- (A.W.B.).
- Department of Development and Regeneration, Woman and Child, Group Biomedical Sciences, KU Leuven, 3000 Leuven, Belgium.
- Pelvic Floor Unit, University Hospitals KU Leuven, 3000 Leuven, Belgium.
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13
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Lukjanenko L, Karaz S, Stuelsatz P, Gurriaran-Rodriguez U, Michaud J, Dammone G, Sizzano F, Mashinchian O, Ancel S, Migliavacca E, Liot S, Jacot G, Metairon S, Raymond F, Descombes P, Palini A, Chazaud B, Rudnicki MA, Bentzinger CF, Feige JN. Aging Disrupts Muscle Stem Cell Function by Impairing Matricellular WISP1 Secretion from Fibro-Adipogenic Progenitors. Cell Stem Cell 2019; 24:433-446.e7. [PMID: 30686765 DOI: 10.1016/j.stem.2018.12.014] [Citation(s) in RCA: 168] [Impact Index Per Article: 33.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 10/15/2018] [Accepted: 12/17/2018] [Indexed: 12/17/2022]
Abstract
Research on age-related regenerative failure of skeletal muscle has extensively focused on the phenotypes of muscle stem cells (MuSCs). In contrast, the impact of aging on regulatory cells in the MuSC niche remains largely unexplored. Here, we demonstrate that aging impairs the function of mouse fibro-adipogenic progenitors (FAPs) and thereby indirectly affects the myogenic potential of MuSCs. Using transcriptomic profiling, we identify WNT1 Inducible Signaling Pathway Protein 1 (WISP1) as a FAP-derived matricellular signal that is lost during aging. WISP1 is required for efficient muscle regeneration and controls the expansion and asymmetric commitment of MuSCs through Akt signaling. Transplantation of young FAPs or systemic treatment with WISP1 restores the myogenic capacity of MuSCs in aged mice and rescues skeletal muscle regeneration. Our work establishes that loss of WISP1 from FAPs contributes to MuSC dysfunction in aged skeletal muscles and demonstrates that this mechanism can be targeted to rejuvenate myogenesis.
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Affiliation(s)
- Laura Lukjanenko
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland; School of Life Sciences, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Sonia Karaz
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | - Pascal Stuelsatz
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | - Uxia Gurriaran-Rodriguez
- Sprott Center for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, ON K1H8L6, Canada; Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Joris Michaud
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | - Gabriele Dammone
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | - Federico Sizzano
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | - Omid Mashinchian
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland; School of Life Sciences, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Sara Ancel
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland; School of Life Sciences, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | | | - Sophie Liot
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS 5310, INSERM U1217, Lyon, France
| | - Guillaume Jacot
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | | | - Frederic Raymond
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | | | - Alessio Palini
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland
| | - Benedicte Chazaud
- Institut NeuroMyoGène, Université Claude Bernard Lyon 1, CNRS 5310, INSERM U1217, Lyon, France
| | - Michael A Rudnicki
- Sprott Center for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, ON K1H8L6, Canada; Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - C Florian Bentzinger
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland; Département de pharmacologie et physiologie, Faculté de médecine et des sciences de la santé, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Jerome N Feige
- Nestlé Research, EPFL Innovation Park, 1015 Lausanne, Switzerland; School of Life Sciences, Ecole Polytechnique Federale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
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14
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Jia G, Sowers JR. Increased Fibro-Adipogenic Progenitors and Intramyocellular Lipid Accumulation in Obesity-Related Skeletal Muscle Dysfunction. Diabetes 2019; 68:18-20. [PMID: 30573676 PMCID: PMC6302534 DOI: 10.2337/dbi18-0047] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Guanghong Jia
- Diabetes and Cardiovascular Research Center, University of Missouri School of Medicine, Columbia, MO
- Harry S. Truman Memorial Veterans' Hospital, Columbia, MO
| | - James R Sowers
- Diabetes and Cardiovascular Research Center, University of Missouri School of Medicine, Columbia, MO
- Harry S. Truman Memorial Veterans' Hospital, Columbia, MO
- Department of Medical Pharmacology and Physiology, University of Missouri School of Medicine, Columbia, MO
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO
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15
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Abstract
Skeletal muscle regeneration is a highly orchestrated process and involves the activation of many cellular and molecular pathways. Although satellite cells (SCs) are the major cell type responsible for muscle regeneration, pericytes show remarkable myogenic potential and various advantages as cell therapy in muscular disorders. This chapter first introduces the structure, marker expression, origin, and category of pericytes. Next, we discuss their functions in muscular dystrophy and/or muscle injuries, focusing on their myogenic, adipogenic, fibrogenic, chondrogenic, and osteogenic activities. Understanding this knowledge will promote the development of innovative cell therapies for muscle disorders, including muscular dystrophy.
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16
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PPARγ Controls Ectopic Adipogenesis and Cross-Talks with Myogenesis During Skeletal Muscle Regeneration. Int J Mol Sci 2018; 19:ijms19072044. [PMID: 30011852 PMCID: PMC6073847 DOI: 10.3390/ijms19072044] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 07/06/2018] [Accepted: 07/09/2018] [Indexed: 12/22/2022] Open
Abstract
Skeletal muscle is a regenerative tissue which can repair damaged myofibers through the activation of tissue-resident muscle stem cells (MuSCs). Many muscle diseases with impaired regeneration cause excessive adipose tissue accumulation in muscle, alter the myogenic fate of MuSCs, and deregulate the cross-talk between MuSCs and fibro/adipogenic progenitors (FAPs), a bi-potent cell population which supports myogenesis and controls intra-muscular fibrosis and adipocyte formation. In order to better characterize the interaction between adipogenesis and myogenesis, we studied muscle regeneration and MuSC function in whole body Pparg null mice generated by epiblast-specific Cre/lox deletion (PpargΔ/Δ). We demonstrate that deletion of PPARγ completely abolishes ectopic muscle adipogenesis during regeneration and impairs MuSC expansion and myogenesis after injury. Ex vivo assays revealed that perturbed myogenesis in PpargΔ/Δ mice does not primarily result from intrinsic defects of MuSCs or from perturbed myogenic support from FAPs. The immune transition from a pro- to anti-inflammatory MuSC niche during regeneration is perturbed in PpargΔ/Δ mice and suggests that PPARγ signaling in macrophages can interact with ectopic adipogenesis and influence muscle regeneration. Altogether, our study demonstrates that a PPARγ-dependent adipogenic response regulates muscle fat infiltration during regeneration and that PPARγ is required for MuSC function and efficient muscle repair.
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17
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Kawao N, Moritake A, Tatsumi K, Kaji H. Roles of Irisin in the Linkage from Muscle to Bone During Mechanical Unloading in Mice. Calcif Tissue Int 2018; 103:24-34. [PMID: 29332162 DOI: 10.1007/s00223-018-0387-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 01/04/2018] [Indexed: 01/03/2023]
Abstract
Mechanical unloading induces disuse muscle atrophy and bone loss, but the details in mechanism involved in those pathophysiological conditions are not fully understood. Interaction between muscle and bone has been recently noted. Here, we investigated the roles of humoral factors linking muscle to bone during mechanical unloading using mice with hindlimb unloading (HU) and sciatic neurectomy (SNX). HU and SNX reduced muscle volume surrounding the tibia, tissue weights of soleus and gastrocnemius muscle, and trabecular bone mineral density (BMD) in the tibia of mice. Among humoral factors linking muscle to bone, HU and SNX reduced fibronectin type III domain-containing 5 (FNDC5) mRNA levels in the soleus muscle of mice. Simple regression analysis revealed that FNDC5 mRNA levels in the soleus muscle were positively related to trabecular BMD in the tibia of control and HU mice as well as sham and SNX mice. Moreover, FNDC5 mRNA levels were negatively correlated with receptor activator of nuclear factor-κB ligand (RANKL) mRNA levels in the tibia of control and HU mice. Irisin, a product of FNDC5, suppressed osteoclast formation from mouse bone marrow cells and RANKL mRNA levels in primary osteoblasts. FNDC5 mRNA levels elevated by fluid shear stress were antagonized by bone morphogenetic protein (BMP) and phosphatidylinositol 3-kinase (PI3K) signaling inhibitors in myoblastic C2C12 cells. In conclusion, the present study first showed that mechanical unloading reduces irisin expression in the skeletal muscle of mice presumably through BMP and PI3K pathways. Irisin might be involved in muscle/bone relationships regulated by mechanical stress in mice.
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Affiliation(s)
- Naoyuki Kawao
- Department of Physiology and Regenerative Medicine, Faculty of Medicine, Kindai University, Osakasayama, Japan
| | - Akihiro Moritake
- Department of Physiology and Regenerative Medicine, Faculty of Medicine, Kindai University, Osakasayama, Japan
| | - Kohei Tatsumi
- Department of Physiology and Regenerative Medicine, Faculty of Medicine, Kindai University, Osakasayama, Japan
| | - Hiroshi Kaji
- Department of Physiology and Regenerative Medicine, Faculty of Medicine, Kindai University, Osakasayama, Japan.
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18
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Mahdy MAA. Glycerol-induced injury as a new model of muscle regeneration. Cell Tissue Res 2018; 374:233-241. [DOI: 10.1007/s00441-018-2846-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/24/2018] [Indexed: 01/15/2023]
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19
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Rudwill F, O’Gorman D, Lefai E, Chery I, Zahariev A, Normand S, Pagano AF, Chopard A, Damiot A, Laurens C, Hodson L, Canet-Soulas E, Heer M, Meuthen PF, Buehlmeier J, Baecker N, Meiller L, Gauquelin-Koch G, Blanc S, Simon C, Bergouignan A. Metabolic Inflexibility Is an Early Marker of Bed-Rest-Induced Glucose Intolerance Even When Fat Mass Is Stable. J Clin Endocrinol Metab 2018; 103:1910-1920. [PMID: 29546280 PMCID: PMC7263792 DOI: 10.1210/jc.2017-02267] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 03/07/2018] [Indexed: 12/13/2022]
Abstract
Context The effects of energy-balanced bed rest on metabolic flexibility have not been thoroughly examined. Objective We investigated the effects of 21 days of bed rest, with and without whey protein supplementation, on metabolic flexibility while maintaining energy balance. We hypothesized that protein supplementation mitigates metabolic inflexibility by preventing muscle atrophy. Design and Setting Randomized crossover longitudinal study conducted at the German Aerospace Center, Cologne, Germany. Participants and Interventions Ten healthy men were randomly assigned to dietary countermeasure or isocaloric control diet during a 21-day bed rest. Outcome Measures Before and at the end of the bed rest, metabolic flexibility was assessed during a meal test. Secondary outcomes were glucose tolerance by oral glucose tolerance test, body composition by dual energy X-ray absorptiometry, ectopic fat storage by magnetic resonance imaging, and inflammation and oxidative stress markers. Results Bed rest decreased the ability to switch from fat to carbohydrate oxidation when transitioning from fasted to fed states (i.e., metabolic inflexibility), antioxidant capacity, fat-free mass (FFM), and muscle insulin sensitivity along with greater fat deposition in muscle (P < 0.05 for all). Changes in fasting insulin and inflammation were not observed. However, glucose tolerance was reduced during acute overfeeding. Protein supplementation did not prevent FFM loss and metabolic alterations. Conclusions Physical inactivity triggers metabolic inflexibility, even when energy balance is maintained. Although reduced insulin sensitivity and increased fat deposition were observed at the muscle level, systemic glucose intolerance was detected only in response to a moderately high-fat meal. This finding supports the role of physical inactivity in metabolic inflexibility and suggests that metabolic inflexibility precedes systemic glucose intolerance.
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Affiliation(s)
- Floriane Rudwill
- Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
| | - Donal O’Gorman
- 3U Diabetes Consortium, Dublin City University, Dublin, Ireland
- National Institute for Cellular Biotechnology & School of Health and Human Performance, Dublin City University, Dublin, Ireland
| | - Etienne Lefai
- Carmen INSERM U1060, University of Lyon, INRA U1235, Lyon, France
| | - Isabelle Chery
- Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
| | | | - Sylvie Normand
- Human Nutrition Research Centre of Rhône-Alpes, Hospices Civils de Lyon, Lyon, France
| | - Allan F Pagano
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier, France
| | - Angèle Chopard
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier, France
| | - Anthony Damiot
- Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
| | - Claire Laurens
- Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
| | - Leanne Hodson
- Oxford Centre for Diabetes, Endocrinology and Metabolism, University of Oxford, Oxford, United Kingdom
| | | | - Martina Heer
- Institute of Nutritional and Food Sciences, Human Nutrition, University of Bonn, Bonn, Germany
| | - Petra Frings Meuthen
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Judith Buehlmeier
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
- University of Duisburg-Essen, Department of Child and Adolescent Psychiatry, Essen, Germany
| | - Natalie Baecker
- German Aerospace Center (DLR), Institute of Aerospace Medicine, Cologne, Germany
| | - Laure Meiller
- Carmen INSERM U1060, University of Lyon, INRA U1235, Lyon, France
- Human Nutrition Research Centre of Rhône-Alpes, Hospices Civils de Lyon, Lyon, France
| | | | - Stéphane Blanc
- Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
| | - Chantal Simon
- Carmen INSERM U1060, University of Lyon, INRA U1235, Lyon, France
- Human Nutrition Research Centre of Rhône-Alpes, Hospices Civils de Lyon, Lyon, France
| | - Audrey Bergouignan
- Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
- Anschutz Health and Wellness Center, Anschutz Medical Campus, Aurora, Colorado
- Division of Endocrinology, Metabolism and Diabetes, University of Colorado, Anschutz Medical Campus, Aurora, Colorado
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Pagano AF, Brioche T, Arc-Chagnaud C, Demangel R, Chopard A, Py G. Short-term disuse promotes fatty acid infiltration into skeletal muscle. J Cachexia Sarcopenia Muscle 2018; 9:335-347. [PMID: 29248005 PMCID: PMC5879967 DOI: 10.1002/jcsm.12259] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 09/10/2017] [Accepted: 10/02/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Many physiological and/or pathological conditions lead to muscle deconditioning, a well-described phenomenon characterized by a loss of strength and muscle power mainly due to the loss of muscle mass. Fatty infiltrations, or intermuscular adipose tissue (IMAT), are currently well-recognized components of muscle deconditioning. Despite the fact that IMAT is present in healthy human skeletal muscle, its increase and accumulation are linked to muscle dysfunction. Although IMAT development has been largely attributable to inactivity, the precise mechanisms of its establishment are still poorly understood. Because the sedentary lifestyle that accompanies age-related sarcopenia may favour IMAT development, deciphering the early processes of muscle disuse is of great importance before implementing strategies to limit IMAT deposition. METHODS In our study, we took advantage of the dry immersion (DI) model of severe muscle inactivity to induce rapid muscle deconditioning during a short period. During the DI, healthy adult men (n = 12; age: 32 ± 5) remained strictly immersed, in a supine position, in a controlled thermo-neutral water bath. Skeletal muscle biopsies were obtained from the vastus lateralis before and after 3 days of DI. RESULTS We showed that DI for only 3 days was able to decrease myofiber cross-sectional areas (-10.6%). Moreover, protein expression levels of two key markers commonly used to assess IMAT, perilipin, and fatty acid binding protein 4, were upregulated. We also observed an increase in the C/EBPα and PPARγ protein expression levels, indicating an increase in late adipogenic processes leading to IMAT development. While many stem cells in the muscle environment can adopt the capacity to differentiate into adipocytes, fibro-adipogenic progenitors (FAPs) represent the population that appears to play a major role in IMAT development. In our study, we showed an increase in the protein expression of PDGFRα, the specific cell surface marker of FAPs, in response to 3 days of DI. It is well recognized that an unfavourable muscle environment drives FAPs to ectopic adiposity and/or fibrosis. CONCLUSIONS This study is the first to emphasize that during a short period of severe inactivity, muscle deconditioning is associated with IMAT development. Our study also reveals that FAPs could be the main resident muscle stem cell population implicated in ectopic adiposity development in human skeletal muscle.
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Affiliation(s)
- Allan F Pagano
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Thomas Brioche
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Coralie Arc-Chagnaud
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France.,Freshage Research Group - Dept. Physiology, University of Valencia, CIBERFES, INCLIVA, Valencia, Spain
| | - Rémi Demangel
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Angèle Chopard
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
| | - Guillaume Py
- INRA, UMR866 Dynamique Musculaire et Métabolisme, Université de Montpellier, F-34060, Montpellier, France
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Bourlier V, Conte C, Denis C, Dray C, Guillou P, Belliure M, Lorsignol A, Noël M, Buffin-Meyer B. Collective and experimental research project for master's students on the pathophysiology of obesity. ADVANCES IN PHYSIOLOGY EDUCATION 2017; 41:505-513. [PMID: 28978518 DOI: 10.1152/advan.00147.2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 07/21/2017] [Accepted: 08/02/2017] [Indexed: 06/07/2023]
Abstract
We describe here a collective and experimental research project-based learning (ERPBL) for master's students that can be used to illustrate some basic concepts on glucose/lipid homeostasis and renal function around a topical issue. The primary objective of this ERPBL was to strengthen students' knowledge and understanding of physiology and pathophysiology. The secondary objectives were to help students to develop technical/practical abilities and acquire transversal skills with real-world connections. Obesity is a worldwide public health problem that increases the risk for developing type 2 diabetes and nephropathies. To study the impact of western dietary habits, students evaluated the effects of a diet enriched with fat and cola [high-fat and cola diet (HFCD)] on metabolism and renal function in mice. Students mainly worked in tandem to prepare and perform experiments, but also collectively to compile, analyze, and discuss data. Students showed that HFCD-fed mice 1) developed obesity; 2) exhibited glucose homeostasis impairments associated to ectopic fat storage; and 3) displayed reduced glomerular filtration. The educational benefit of the program was estimated using three evaluation metrics: a conventional multicriteria assessment by teachers, a pre-/posttest, and a self-evaluation questionnaire. They showed that the current approach successfully strengthened scientific student knowledge and understanding of physiology/pathophysiology. In addition, it helped students develop new skills, such as technical and transversal skills. We concluded that this ERPBL dealing with the pathophysiology of obesity was strongly beneficial for master's students, thereby appearing as an efficient and performing educational tool.
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Affiliation(s)
- Virginie Bourlier
- Pôle de Physiologie Animale, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France
| | - Caroline Conte
- Pôle de Biologie Moléculaire, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France; and
| | - Colette Denis
- Pôle de Physiologie Animale, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France
| | - Cédric Dray
- Pôle de Physiologie Animale, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France
| | - Pascale Guillou
- Pôle de Physiologie Animale, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France
| | - Manuela Belliure
- Pôle de Physiologie Animale, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France
| | - Anne Lorsignol
- Pôle de Physiologie Animale, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France
| | - Marion Noël
- Centre de Développement de la Pédagogie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France
| | - Bénédicte Buffin-Meyer
- Pôle de Physiologie Animale, Département Biologie et Géosciences, Faculté des Sciences et d'Ingénierie, Université Paul Sabatier/Toulouse III, Université Fédérale Toulouse Midi-Pyrénées, Toulouse, France;
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22
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Grau-Monge C, Delcroix GJR, Bonnin-Marquez A, Valdes M, Awadallah ELM, Quevedo DF, Armour MR, Montero RB, Schiller PC, Andreopoulos FM, D'Ippolito G. Marrow-isolated adult multilineage inducible cells embedded within a biologically-inspired construct promote recovery in a mouse model of peripheral vascular disease. ACTA ACUST UNITED AC 2017; 12:015024. [PMID: 28211362 DOI: 10.1088/1748-605x/aa5a74] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Peripheral vascular disease is one of the major vascular complications in individuals suffering from diabetes and in the elderly that is associated with significant burden in terms of morbidity and mortality. Stem cell therapy is being tested as an attractive alternative to traditional surgery to prevent and treat this disorder. The goal of this study was to enhance the protective and reparative potential of marrow-isolated adult multilineage inducible (MIAMI) cells by incorporating them within a bio-inspired construct (BIC) made of two layers of gelatin B electrospun nanofibers. We hypothesized that the BIC would enhance MIAMI cell survival and engraftment, ultimately leading to a better functional recovery of the injured limb in our mouse model of critical limb ischemia compared to MIAMI cells used alone. Our study demonstrated that MIAMI cell-seeded BIC resulted in a wide range of positive outcomes with an almost full recovery of blood flow in the injured limb, thereby limiting the extent of ischemia and necrosis. Functional recovery was also the greatest when MIAMI cells were combined with BICs, compared to MIAMI cells alone or BICs in the absence of cells. Histology was performed 28 days after grafting the animals to explore the mechanisms at the source of these positive outcomes. We observed that our critical limb ischemia model induces an extensive loss of muscular fibers that are replaced by intermuscular adipose tissue (IMAT), together with a highly disorganized vascular structure. The use of MIAMI cells-seeded BIC prevented IMAT infiltration with some clear evidence of muscular fibers regeneration.
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Affiliation(s)
- Cristina Grau-Monge
- Department of Orthopaedics, University of Miami Miller School of Medicine, FL, United States of America. Geriatric Research, Education, and Clinical Center and Research Service, Bruce W. Carter VAMC, Miami, FL, United States of America
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23
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Biltz NK, Meyer GA. A novel method for the quantification of fatty infiltration in skeletal muscle. Skelet Muscle 2017; 7:1. [PMID: 28073372 PMCID: PMC5223468 DOI: 10.1186/s13395-016-0118-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Accepted: 12/06/2016] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Fatty infiltration of the skeletal muscle is a common but poorly understood feature of many myopathies. It is best described in human muscle, where non-invasive imaging techniques and representative histology have been optimized to view and quantify infiltrating fat. However, human studies are limited in their ability to identify cellular and molecular mechanisms regulating fatty infiltration, a likely prerequisite to developing targeted interventions. As mechanistic investigations move to small animals, studies may benefit from new or adapted imaging tools optimized for high resolution and whole muscle quantification. RESULTS Here, we describe a novel method to evaluate fatty infiltration, developed for use with mouse muscle. In this methodology, muscle cellular membranes and proteins are removed via decellularization, but fatty infiltrate lipid is spared, trapped in its native distribution in a transparent extracellular matrix construct. This lipid can then be stained with visible or fluorescent dyes and imaged. We present three methods to stain and evaluate lipid in decellularized muscles which can be used individually or combined: (1) qualitative visualization of the amount and 3D spatial distribution of fatty infiltration using visible lipid soluble dye Oil Red O (ORO), (2) quantitative analysis of individual lipid droplet metrics (e.g., volume) via confocal imaging of fluorescent lipid soluble dye boron-dipyrromethene (BODIPY), and (3) quantitative analysis of total lipid content by optical density reading of extracted stained lipid. This methodology was validated by comparing glycerol-induced fatty infiltration between two commonly used mouse strains: 129S1/SvlmJ (129S1) and C57BL/6J (BL/6J). All three methods were able to detect a significant increase in fatty infiltrate volume in the 129S1 muscle compared with that in BL/6J, and methods 1 and 2 additionally described a difference in the distribution of fatty infiltrate, indicating susceptibility to glycerol-induced fatty infiltration is strain-specific. CONCLUSIONS With more mechanistic studies of fatty infiltration moving to small animal models, having an alternative to expensive non-invasive imaging techniques and selective representative histology will be beneficial. In this work, we present a method that can quantify both individual adipocyte lipids and whole muscle total fatty infiltrate lipid.
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Affiliation(s)
- Nicole K Biltz
- Program in Physical Therapy, Washington University in St. Louis, 4444 Forest Park Blvd, St. Louis, 63108, MO, USA
| | - Gretchen A Meyer
- Program in Physical Therapy, Washington University in St. Louis, 4444 Forest Park Blvd, St. Louis, 63108, MO, USA. .,Departments of Neurology, Biomedical Engineering and Orthopaedic Surgery, Washington University, St. Louis, MO, USA.
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Brioche T, Pagano AF, Py G, Chopard A. Muscle wasting and aging: Experimental models, fatty infiltrations, and prevention. Mol Aspects Med 2016; 50:56-87. [PMID: 27106402 DOI: 10.1016/j.mam.2016.04.006] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2015] [Revised: 04/13/2016] [Accepted: 04/13/2016] [Indexed: 12/21/2022]
Abstract
Identification of cost-effective interventions to maintain muscle mass, muscle strength, and physical performance during muscle wasting and aging is an important public health challenge. It requires understanding of the cellular and molecular mechanisms involved. Muscle-deconditioning processes have been deciphered by means of several experimental models, bringing together the opportunities to devise comprehensive analysis of muscle wasting. Studies have increasingly recognized the importance of fatty infiltrations or intermuscular adipose tissue for the age-mediated loss of skeletal-muscle function and emphasized that this new important factor is closely linked to inactivity. The present review aims to address three main points. We first mainly focus on available experimental models involving cell, animal, or human experiments on muscle wasting. We next point out the role of intermuscular adipose tissue in muscle wasting and aging and try to highlight new findings concerning aging and muscle-resident mesenchymal stem cells called fibro/adipogenic progenitors by linking some cellular players implicated in both FAP fate modulation and advancing age. In the last part, we review the main data on the efficiency and molecular and cellular mechanisms by which exercise, replacement hormone therapies, and β-hydroxy-β-methylbutyrate prevent muscle wasting and sarcopenia. Finally, we will discuss a potential therapeutic target of sarcopenia: glucose 6-phosphate dehydrogenase.
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Affiliation(s)
- Thomas Brioche
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France.
| | - Allan F Pagano
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
| | - Guillaume Py
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
| | - Angèle Chopard
- Université de Montpellier, INRA, UMR 866 Dynamique Musculaire et Métabolisme, Montpellier F-34060, France
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