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The omentum harbors unique conditions in the peritoneal cavity to promote healing and regeneration for diaphragm muscle repair in mdx mice. Cell Tissue Res 2020; 382:447-455. [PMID: 32661578 DOI: 10.1007/s00441-020-03238-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Accepted: 06/05/2020] [Indexed: 10/23/2022]
Abstract
Although the primary cause of Duchenne muscular dystrophy (DMD) is a genetic mutation, the inflammatory response contributes directly to severity and exacerbation of the diaphragm muscle pathology. The omentum is a lymphoid organ with unique structural and immune functions serving as a sanctuary of hematopoietic and mesenchymal progenitors that coordinate immune responses in the peritoneal cavity. Upon activation, these progenitors expand and the organ produces large amounts of growth factors orchestrating tissue regeneration. The omentum of mdx mouse, a DMD murine model, is rich in milky spots and produces growth factors that promote diaphragm muscle regeneration. The present review summarizes the current knowledge of the omentum as an important immunologic structure and highlights its contribution to resolution of dystrophic muscle injury by providing an adequate environment for muscle regeneration, thus being a potential site for therapeutic interventions in DMD.
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Omentum acts as a regulatory organ controlling skeletal muscle repair of mdx mice diaphragm. Cell Tissue Res 2019; 377:269-279. [DOI: 10.1007/s00441-019-03012-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 03/06/2019] [Indexed: 12/18/2022]
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Lacourpaille L, Gross R, Hug F, Guével A, Péréon Y, Magot A, Hogrel JY, Nordez A. Effects of Duchenne muscular dystrophy on muscle stiffness and response to electrically-induced muscle contraction: A 12-month follow-up. Neuromuscul Disord 2017; 27:214-220. [DOI: 10.1016/j.nmd.2017.01.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 11/24/2016] [Accepted: 01/04/2017] [Indexed: 01/26/2023]
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Wang MM, Hao LY, Guo F, Zhong B, Zhong XM, Yuan J, Hao YF, Zhao S, Sun XF, Lei M, Jiao GY. Decreased intracellular [Ca 2+ ] coincides with reduced expression of Dhprα1s, RyR1, and diaphragmatic dysfunction in a rat model of sepsis. Muscle Nerve 2017; 56:1128-1136. [PMID: 28044347 DOI: 10.1002/mus.25554] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/30/2016] [Indexed: 12/23/2022]
Abstract
INTRODUCTION Sepsis can cause decreased diaphragmatic contractility. Intracellular calcium as a second messenger is central to diaphragmatic contractility. However, changes in intracellular calcium concentration ([Ca2+ ]) and the distribution and co-localization of relevant calcium channels [dihydropyridine receptors, (DHPRα1s) and ryanodine receptors (RyR1)] remain unclear during sepsis. In this study we investigated the effect of changed intracellular [Ca2+ ] and expression and distribution of DHPRα1s and RyR1 on diaphragm function during sepsis. METHODS We measured diaphragm contractility and isolated diaphragm muscle cells in a rat model of sepsis. The distribution and co-localization of DHPRα1s and RyR1 were determined using immunohistochemistry and immunofluorescence, whereas intracellular [Ca2+ ] was measured by confocal microscopy and fluorescence spectrophotometry. RESULTS Septic rat diaphragm contractility, expression of DHPRα1s and RyR1, and intracellular [Ca2+ ] were significantly decreased in the rat sepsis model compared with controls. DISCUSSION Decreased intracellular [Ca2+ ] coincides with diaphragmatic contractility and decreased expression of DHPRα1s and RyR1 in sepsis. Muscle Nerve 56: 1128-1136, 2017.
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Affiliation(s)
- Meng-Meng Wang
- Department of Respiratory and Intensive Care Unit, Shengjing Hospital of China Medical University, Shenyang, Postal Code 110004, People's Republic of China
| | - Li-Ying Hao
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, Shenyang, People's Republic of China
| | - Feng Guo
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, Shenyang, People's Republic of China
| | - Bin Zhong
- Department of Respiratory Medicine, The First Affiliated Hospital of Gannan Medical University, Ganzhou, Jiangxi Province, People's Republic of China
| | - Xiao-Mei Zhong
- Department of Respiratory and Intensive Care Unit, Shengjing Hospital of China Medical University, Shenyang, Postal Code 110004, People's Republic of China
| | - Jing Yuan
- Department of Respiratory and Intensive Care Unit, Shengjing Hospital of China Medical University, Shenyang, Postal Code 110004, People's Republic of China
| | - Yi-Fei Hao
- Department of Orthopedic Surgery, Shengjing Hospital of China Medical University, Shenyang, People's Republic of China
| | - Shuang Zhao
- Department of Respiratory and Intensive Care Unit, Shengjing Hospital of China Medical University, Shenyang, Postal Code 110004, People's Republic of China
| | - Xue-Fei Sun
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, Shenyang, People's Republic of China
| | - Ming Lei
- Department of Pharmaceutical Toxicology, School of Pharmaceutical Sciences, China Medical University, Shenyang, People's Republic of China
| | - Guang-Yu Jiao
- Department of Respiratory and Intensive Care Unit, Shengjing Hospital of China Medical University, Shenyang, Postal Code 110004, People's Republic of China
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Lacourpaille L, Hug F, Guével A, Péréon Y, Magot A, Hogrel JY, Nordez A. Non-invasive assessment of muscle stiffness in patients with duchenne muscular dystrophy. Muscle Nerve 2014; 51:284-6. [DOI: 10.1002/mus.24445] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/29/2014] [Indexed: 01/22/2023]
Affiliation(s)
- Lilian Lacourpaille
- Laboratory “Motricité, Interactions, Performance” (EA 4334), University of Nantes; UFR STAPS, 25 bis boulevard Guy Mollet, BP 72206, 44322 Nantes cedex 3 France
| | - François Hug
- Laboratory “Motricité, Interactions, Performance” (EA 4334), University of Nantes; UFR STAPS, 25 bis boulevard Guy Mollet, BP 72206, 44322 Nantes cedex 3 France
- NHMRC Centre of Clinical Research Excellence in Spinal Pain, Injury and Health, The University of Queensland, School of Health and Rehabilitation Sciences; Brisbane Australia
| | - Arnaud Guével
- Laboratory “Motricité, Interactions, Performance” (EA 4334), University of Nantes; UFR STAPS, 25 bis boulevard Guy Mollet, BP 72206, 44322 Nantes cedex 3 France
| | - Yann Péréon
- Centre de Référence Maladies Neuromusculaires Nantes-Angers, University of Nantes, Centre Hospitalier Universitaire; Nantes France
- Atlantic Gene Therapies; Nantes France
| | - Armelle Magot
- Centre de Référence Maladies Neuromusculaires Nantes-Angers, University of Nantes, Centre Hospitalier Universitaire; Nantes France
- Atlantic Gene Therapies; Nantes France
| | | | - Antoine Nordez
- Laboratory “Motricité, Interactions, Performance” (EA 4334), University of Nantes; UFR STAPS, 25 bis boulevard Guy Mollet, BP 72206, 44322 Nantes cedex 3 France
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Alves GA, Silva LR, Rosa EF, Aboulafia J, Freymüller-Haapalainen E, Souccar C, Nouailhetas VLA. Intestine of dystrophic mice presents enhanced contractile resistance to stretching despite morphological impairment. Am J Physiol Gastrointest Liver Physiol 2014; 306:G191-9. [PMID: 24284964 DOI: 10.1152/ajpgi.00314.2013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Protein dystrophin is a component of the dystrophin-associated protein complex, which links the contractile machinery to the plasma membrane and to the extracellular matrix. Its absence leads to a condition known as Duchenne muscular dystrophy (DMD), a disease characterized by progressive skeletal muscle degeneration, motor disability, and early death. In mdx mice, the most common DMD animal model, loss of muscle cells is observed, but the overall disease alterations are less intense than in DMD patients. Alterations in gastrointestinal tissues from DMD patients and mdx mice are not yet completely understood. Thus, we investigated the possible relationships between morphological (light and electron microscopy) and contractile function (by recording the isometric contractile response) with alterations in Ca²⁺ handling in the ileum of mdx mice. We evidenced a 27% reduction in the ileal muscular layer thickness, a partial damage to the mucosal layer, and a partial damage to mitochondria of the intestinal myocytes. Functionally, the ileum from mdx presented an enhanced responsiveness during stretch, a mild impairment in both the electromechanical and pharmacomechanical signaling associated with altered calcium influx-induced contraction, with no alterations in the sarcoplasmic reticulum Ca²⁺ storage (maintenance of the caffeine and thapsigargin-induced contraction) compared with control animals. Thus, it is evidenced that the protein dystrophin plays an important role in the preservation of both the microstructure and ultrastructure of mice intestine, while exerting a minor but important role concerning the intestinal contractile responsiveness and calcium handling.
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Affiliation(s)
- Gabriel A Alves
- Department of Biophysics, Escola Paulista de Medicina-Universidade Federal de São Paulo, São Paulo, Brazil
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