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Dombrecht D, Van Daele U, Van Asbroeck B, Schieffelers D, Guns PJ, Gebruers N, Meirte J, van Breda E. Molecular mechanisms of post-burn muscle wasting and the therapeutic potential of physical exercise. J Cachexia Sarcopenia Muscle 2023; 14:758-770. [PMID: 36760077 PMCID: PMC10067483 DOI: 10.1002/jcsm.13188] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 01/03/2023] [Accepted: 01/16/2023] [Indexed: 02/11/2023] Open
Abstract
After a severe burn injury, a systemic stress response activates metabolic and inflammatory derangements that, among other, leads to muscle mass loss (muscle wasting). These negative effects on skeletal muscle continue for several months or years and are aggravated by short-term and long-term disuse. The dynamic balance between muscle protein synthesis and muscle protein breakdown (proteolysis) is regulated by complex signalling pathways that leads to an overall negative protein balance in skeletal muscle after a burn injury. Research concerning these molecular mechanisms is still scarce and inconclusive, understanding of which, if any, molecular mechanisms contribute to muscle wasting is of fundamental importance in designing of therapeutic interventions for burn patients as well. This review not only summarizes our present knowledge of the molecular mechanisms that underpin muscle protein balance but also summarizes the effects of exercise on muscle wasting post-burn as promising strategy to counteract the detrimental effects on skeletal muscle. Future research focusing on the pathways causing post-burn muscle wasting and the different effects of exercise on them is needed to confirm this hypothesis and to lay the foundation of therapeutic strategies.
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Affiliation(s)
- Dorien Dombrecht
- Department of Rehabilitation Sciences & Physiotherapy, Research group MOVANT, Multidisciplinary Metabolic Research Unit (M2RUN), University of Antwerp, Antwerp, Belgium
| | - Ulrike Van Daele
- Department of Rehabilitation Sciences & Physiotherapy, Research group MOVANT, Multidisciplinary Metabolic Research Unit (M2RUN), University of Antwerp, Antwerp, Belgium.,Oscare, Organisation for Burns, Scar After-Care and Research, Antwerp, Belgium
| | - Birgit Van Asbroeck
- Department of Rehabilitation Sciences & Physiotherapy, Research group MOVANT, Multidisciplinary Metabolic Research Unit (M2RUN), University of Antwerp, Antwerp, Belgium
| | - David Schieffelers
- Department of Rehabilitation Sciences & Physiotherapy, Research group MOVANT, Multidisciplinary Metabolic Research Unit (M2RUN), University of Antwerp, Antwerp, Belgium
| | - Pieter-Jan Guns
- Laboratory of Physiopharmacology, University of Antwerp, Antwerp, Belgium
| | - Nick Gebruers
- Department of Rehabilitation Sciences & Physiotherapy, Research group MOVANT, Multidisciplinary Metabolic Research Unit (M2RUN), University of Antwerp, Antwerp, Belgium.,Multidisciplinary Edema Clinic, Antwerp University Hospital, Edegem, Belgium
| | - Jill Meirte
- Department of Rehabilitation Sciences & Physiotherapy, Research group MOVANT, Multidisciplinary Metabolic Research Unit (M2RUN), University of Antwerp, Antwerp, Belgium.,Oscare, Organisation for Burns, Scar After-Care and Research, Antwerp, Belgium
| | - Eric van Breda
- Department of Rehabilitation Sciences & Physiotherapy, Research group MOVANT, Multidisciplinary Metabolic Research Unit (M2RUN), University of Antwerp, Antwerp, Belgium
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Ono Y, Saito M, Sakamoto K, Maejima Y, Misaka S, Shimomura K, Nakanishi N, Inoue S, Kotani J. C188-9, a specific inhibitor of STAT3 signaling, prevents thermal burn-induced skeletal muscle wasting in mice. Front Pharmacol 2022; 13:1031906. [PMID: 36588738 PMCID: PMC9800842 DOI: 10.3389/fphar.2022.1031906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022] Open
Abstract
Burn injury is the leading cause of death and disability worldwide and places a tremendous economic burden on society. Systemic inflammatory responses induced by thermal burn injury can cause muscle wasting, a severe involuntary loss of skeletal muscle that adversely affects the survival and functional outcomes of these patients. Currently, no pharmacological interventions are available for the treatment of thermal burn-induced skeletal muscle wasting. Elevated levels of inflammatory cytokines, such as interleukin-6 (IL-6), are important hallmarks of severe burn injury. The levels of signal transducer and activator of transcription 3 (STAT3)-a downstream component of IL-6 inflammatory signaling-are elevated with muscle wasting in various pro-catabolic conditions, and STAT3 has been implicated in the regulation of skeletal muscle atrophy. Here, we tested the effects of the STAT3-specific signaling inhibitor C188-9 on thermal burn injury-induced skeletal muscle wasting in vivo and on C2C12 myotube atrophy in vitro after the administration of plasma from burn model mice. In mice, thermal burn injury severity dependently increased IL-6 in the plasma and tibialis anterior muscles and activated the STAT3 (increased ratio of phospho-STAT3/STAT3) and ubiquitin-proteasome proteolytic pathways (increased Atrogin-1/MAFbx and MuRF1). These effects resulted in skeletal muscle atrophy and reduced grip strength. In murine C2C12 myotubes, plasma from burn mice activated the same inflammatory and proteolytic pathways, leading to myotube atrophy. In mice with burn injury, the intraperitoneal injection of C188-9 (50 mg/kg) reduced activation of the STAT3 and ubiquitin-proteasome proteolytic pathways, reversed skeletal muscle atrophy, and increased grip strength. Similarly, pretreatment of murine C2C12 myotubes with C188-9 (10 µM) reduced activation of the same inflammatory and proteolytic pathways, and ameliorated myotube atrophy induced by plasma taken from burn model mice. Collectively, these results indicate that pharmacological inhibition of STAT3 signaling may be a novel therapeutic strategy for thermal burn-induced skeletal muscle wasting.
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Affiliation(s)
- Yuko Ono
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan,Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan,*Correspondence: Yuko Ono,
| | - Masafumi Saito
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Kazuho Sakamoto
- Department of Bio-Informational Pharmacology, School of Pharmaceutical Sciences, University of Shizuoka, Shizuoka, Japan
| | - Yuko Maejima
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Shingen Misaka
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Kenju Shimomura
- Department of Bioregulation and Pharmacological Medicine, School of Medicine, Fukushima Medical University, Fukushima, Japan
| | - Nobuto Nakanishi
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Shigeaki Inoue
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
| | - Joji Kotani
- Department of Disaster and Emergency Medicine, Graduate School of Medicine, Kobe University, Kobe, Japan
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3
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Mayer WP, Baptista JDS, De Oliveira F, Mori M, Liberti EA. Consequences of ankle joint immobilisation: insights from a morphometric analysis about fibre typification, intramuscular connective tissue, and muscle spindle in rats. Histochem Cell Biol 2021; 156:583-594. [PMID: 34476549 DOI: 10.1007/s00418-021-02027-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/24/2021] [Indexed: 11/26/2022]
Abstract
Orthosis immobilisations are routinely used in orthopaedic procedures. This intervention is applicable in bone fractures, ligament injuries, and tendonitis, among other disorders of the musculoskeletal system. We aimed to evaluate the effects of ankle joint functional immobilisation on muscle fibre morphology, connective tissue, muscle spindle and fibre typification triggered by a novel metallic orthosis. We developed a rodent-proof experimental orthosis able to hold the tibiotalar joint in a functional position for short and long terms. The tibialis anterior muscles of free and immobilised legs were collected and stained by histology and histochemistry techniques to investigate general muscle morphology, connective tissue and muscle fibre typification. Morphometric analysis of muscle cross-section area, fibre type cross-section area, fibre type density, percentage of intramuscular connective tissue, and thickness of the muscle spindle capsule were obtained to gain insights into the experimental protocol. We found that short- and long-term immobilisation decreased the cross-section area of the muscles and induced centralisation of myonuclei. The connective tissue of immobilised muscle increased after 2 and 4 weeks mainly by deposition of type III and type I collagen fibres in the perimysium and endomysium, respectively, in addition to muscle spindle capsule thickening. Type IIB muscle fibre was severely affected in our study; the profile assumed odd shapes, and our data suggest interconversion of these fibre types within long-term immobilisation. In conclusion, our protocol has produced structural and histochemical changes in muscle biology. This method might be applied to various rodent models that enable genetic manipulation for the investigation of muscle degeneration/regeneration processes.
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Affiliation(s)
- William P Mayer
- Department of Medical Neuroscience, Dalhousie Medicine New Brunswick, Dalhousie University, Saint John, NB, Canada.
| | | | - Flavia De Oliveira
- Department of Biosciences, Federal University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Matsuyoshi Mori
- Department of Prothesis, School of Dentistry, University of Sao Paulo, Sao Paulo, SP, Brazil
| | - Edson A Liberti
- Department of Anatomy, University of Sao Paulo, Sao Paulo, SP, Brazil
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4
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Clark AT, Song J, Yao X, Carlson D, Huebinger RM, Mei Liu M, Madni TD, Imran JB, Taveras LR, Weis HB, Arnoldo BD, Phelan HA, Wolf SE. Muscle Homeostasis Is Disrupted in Burned Adults. J Burn Care Res 2021; 41:33-40. [PMID: 31738430 DOI: 10.1093/jbcr/irz190] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Severe burn leads to substantial skeletal muscle wasting that is associated with adverse outcomes and protracted recovery. The purpose of our study was to investigate muscle tissue homeostasis in response to severe burn. Muscle biopsies from the right m. lateralis were obtained from 10 adult burn patients at the time of their first operation. Patients were grouped by burn size (total body surface area of <30% vs ≥30%). Muscle fiber size and factors of cell death and muscle regeneration were examined. Muscle cell cross-sectional area was significantly smaller in the large-burn group (2174.3 ± 183.8 µm2 vs 3687.0 ± 527.2 µm2, P = .04). The expression of ubiquitin E3 ligase MuRF1 and cell death downstream effector caspace 3 was increased in the large-burn group (P < .05). No significant difference was seen between groups in expression of the myogenic factors Pax7, MyoD, or myogenin. Interestingly, Pax7 and proliferating cell nuclear antigen (PCNA) expression in muscle tissue were significantly correlated to injury severity only in the smaller-burn group (P < .05). In conclusion, muscle atrophy after burn is driven by apoptotic activation without an equal response of satellite cell activation, differentiation, and fusion.
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Affiliation(s)
- Audra T Clark
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Juquan Song
- Department of Surgery, University of Texas Medical Branch - Galveston
| | - Xiao Yao
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Deborah Carlson
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Ryan M Huebinger
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Ming Mei Liu
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Tarik D Madni
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Jonathan B Imran
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Luis R Taveras
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Holly B Weis
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Brett D Arnoldo
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Herb A Phelan
- Department of Surgery, Division of Burn, Trauma, and Critical Care, University of Texas Southwestern Medical Center, Dallas
| | - Steven E Wolf
- Department of Surgery, University of Texas Medical Branch - Galveston
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Tomé TDC, Quintana HT, Bortolin JA, Taffarel AA, Liberti EA, De Oliveira F. Extensive burn injury causes bone collagen network alteration and growth delay related to RANK-L immunoexpression change. Connect Tissue Res 2020; 61:465-474. [PMID: 31092061 DOI: 10.1080/03008207.2019.1620220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
PURPOSE Extensive burn injury mainly affects children, and hypermetabolic state can lead to growth delay. This study aimed to investigate bone histopathological and morphometric aspects, collagen fibers network and the immunoexpression of biological markers related to bone development in a young experimental model for extensive burn. MATERIALS AND METHODS A total of 28 male Wistar rats were distributed into Control (C) and subjected to scald burn injury (SBI) groups. Sham or injured animals were euthanized 4 or 14 days post-lesion and proximal epiphyses of the femur were submitted to histological, morphometric (thickness epiphyseal plate), and RUNX-2 and receptor activator of nuclear factor kappa- β ligand (RANK-L) immunoexpression methods. RESULTS Histopathological femoral findings showed delayed appearance of the secondary ossification center in SBI, 14 days post-injury. Collagen fibers 4 days after injury were observed in articular cartilage as a pantographic network with a transversally oriented lozenge-shaped mesh, but this network was thinner in SBI. Fourteen days after the injury, the pantographic network of collagen presented square-shaped mesh in C, but this aspect was changed to a wider mesh in SBI. Morphometric analysis of epiphyseal plate revealed that the SBI group had less thickness than the respective controls (p<0.05). RUNX-2 showed no difference between groups, but RANK-L score was higher in all SBI groups. CONCLUSIONS Extensive burn injury causes delayed bone growth and morphological changes. Alterations in collagen network and enhancement in immunoreactivity of RANK-L result in increased osteoclastogenesis.
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Affiliation(s)
- Tabata De Carvalho Tomé
- Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista , SP, Brazil
| | - Hananiah Tardivo Quintana
- Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista , SP, Brazil
| | - Jeferson André Bortolin
- Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista , SP, Brazil
| | - André Andriolli Taffarel
- Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista , SP, Brazil
| | | | - Flavia De Oliveira
- Departamento de Biociências, Universidade Federal de São Paulo, Campus Baixada Santista , SP, Brazil
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6
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Quintana HT, Baptista VIDA, Lazzarin MC, Antunes HKM, Le Sueur-Maluf L, de Oliveira CAM, de Oliveira F. Insulin Modulates Myogenesis and Muscle Atrophy Resulting From Skin Scald Burn in Young Male Rats. J Surg Res 2020; 257:56-68. [PMID: 32818785 DOI: 10.1016/j.jss.2020.07.040] [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: 10/19/2018] [Revised: 06/18/2020] [Accepted: 07/07/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Burn injuries (BIs) due to scalding are one of the most common accidents among children. BIs greater than 40% of total body surface area are considered extensive and result in local and systemic response. We sought to assess morphological and myogenic mechanisms through both short- and long-term intensive insulin therapies that affect the skeletal muscle after extensive skin BI in young rats. MATERIALS AND METHODS Wistar rats aged 21 d were distributed into four groups: control (C), control with insulin (C + I), scald burn injury (SI), and SI with insulin (SI + I). The SI groups were submitted to a 45% total body surface area burn, and the C + I and SI + I groups received insulin (5 UI/Kg/d) for 4 or 14 d. Glucose tolerance and the homeostatic model assessment of insulin resistance index were determined. Gastrocnemius muscles were analyzed for histopathological, morphometric, and immunohistochemical myogenic parameters (Pax7, MyoD, and MyoG); in addition, the expression of genes related to muscle atrophy (MuRF1 and MAFbx) and its regulation (IGF-1) were also assessed. RESULTS Short-term treatment with insulin favored muscle regeneration by primary myogenesis and decreased muscle atrophy in animals with BIs, whereas the long-term treatment modulated myogenesis by increasing the MyoD protein. Both treatments improved histopathological parameters and secondary myogenesis by increasing the MyoG protein. CONCLUSIONS Treatment with insulin benefits myogenic parameters during regeneration and modulates MuRF1, an important mediator of muscle atrophy.
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Affiliation(s)
| | | | | | | | | | | | - Flavia de Oliveira
- Departamento de Biociências, Universidade Federal de São Paulo, Santos, SP, Brazil.
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7
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Brightwell CR, Hanson ME, El Ayadi A, Prasai A, Wang Y, Finnerty CC, Fry CS. Thermal injury initiates pervasive fibrogenesis in skeletal muscle. Am J Physiol Cell Physiol 2020; 319:C277-C287. [PMID: 32432932 DOI: 10.1152/ajpcell.00337.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Severe burn injury induces a myriad of deleterious effects to skeletal muscle, resulting in impaired function and delayed recovery. Following burn, catabolic signaling and myofiber atrophy are key fiber-intrinsic determinants of weakness; less well understood are alterations in the interstitial environment surrounding myofibers. Muscle quality, specifically alterations in the extracellular matrix (ECM), modulates force transmission and strength. We sought to determine the impact of severe thermal injury on adaptation to the muscle ECM and quantify muscle fibrotic burden. After a 30% total body surface area dorsal burn, spinotrapezius muscle was harvested from mice at 7 (7d, n = 5), 14 (14d, n = 4), and 21 days (21d, n = 4), and a sham control group was also examined (Sham, n = 4). Expression of transforming growth factor-β (TGFβ), myostatin, and downstream effectors and proteases involved in fibrosis and collagen remodeling were measured by immunoblotting, and immunohistochemical and biochemical analyses assessed fibrogenic cell abundance and collagen deposition. Myostatin signaling increased progressively through 21 days postburn alongside fibrogenic/adipogenic progenitor cell expansion, with abundance peaking at 14 days postburn. Postburn, elevated expression of tissue inhibitor of matrix metalloproteinase 1 supported collagen remodeling resulting in a net accumulation of muscle collagen content. Collagen accumulation peaked at 14 days postburn but remained elevated through 21 days postburn, demonstrating minimal resolution of burn-induced fibrosis. These findings highlight a progressive upregulation of fibrogenic processes following burn injury, eliciting a fibrotic muscle phenotype that hinders regenerative capacity and is not resolved with 21 days of recovery.
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Affiliation(s)
- Camille R Brightwell
- Cell Biology Graduate Program, University of Texas Medical Branch, Galveston, Texas.,Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, Kentucky.,Center for Muscle Biology, University of Kentucky, Lexington, Kentucky
| | - Madeline E Hanson
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, Texas
| | - Amina El Ayadi
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas.,Shriners Hospitals for Children, Galveston, Texas
| | - Anesh Prasai
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas.,Shriners Hospitals for Children, Galveston, Texas
| | - Ye Wang
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas.,Shriners Hospitals for Children, Galveston, Texas
| | - Celeste C Finnerty
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas.,Shriners Hospitals for Children, Galveston, Texas
| | - Christopher S Fry
- Department of Athletic Training and Clinical Nutrition, University of Kentucky, Lexington, Kentucky.,Center for Muscle Biology, University of Kentucky, Lexington, Kentucky.,Shriners Hospitals for Children, Galveston, Texas
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8
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Lazzarin MC, Quintana HT, Baptista VIDA, Oliveira FD. Lack of dystrophin influences muscle inflammation but not myogenic regulatory factors after eccentric exercise in mdx mice. MOTRIZ: REVISTA DE EDUCACAO FISICA 2020. [DOI: 10.1590/s1980-6574202000030228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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9
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Yujra VQ, Moreira Antunes HK, Mônico-Neto M, Quintana HT, de Oliveira F, Galvani MG, Lee KS, Oshima CTF, Ribeiro DA. Paradoxical sleep deprivation induces differential biological response in rat masticatory muscles: Inflammation, autophagy and myogenesis. J Oral Rehabil 2019; 47:289-300. [PMID: 31701551 DOI: 10.1111/joor.12904] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/03/2019] [Accepted: 10/14/2019] [Indexed: 12/17/2022]
Abstract
BACKGROUND The aim of this study was to evaluate whether sleep deprivation (SD) induces inflammation, autophagy and myogenesis in the following masticatory muscles: masseter and temporal. METHODS In this study, 18 animals were randomly distributed into three groups: control group (CTL, n = 6), SD for 96 hours (SD96, n = 6), and SD for 96 hours and more 96 hours of sleep recovery (SD96 + R, n = 6). RESULTS In the histopathological analysis, SD 96 was able to induce inflammation in masseter and temporal. Nevertheless, the lack of inflammatory process was evidenced to the masseter in the group SD96 + R. Upregulation of TNF-alpha production was detected in the SD96 group, while SD96 + R decreased TNF immunoexpression for both skeletal muscles evaluated. MyoD and myogenin increased in rats submitted to SD96. By contrast, the levels of MyoD decreased in the group SD96 + R. Myogenin pointed out high immunoexpression in SD96 + R groups. In temporal, pAkt decreased in animals submitted to SD96, but it increased in the group SD96 + R. The levels of LC3 protein increased in both skeletal muscles studied, and masseter decreased LC3 protein expression in the SD96 + R. CONCLUSION In summary, our results demonstrate that SD is able to induce inflammation, atrophy and myogenesis in rat masticatory muscles, being more intense in temporal when compared to masseter.
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Affiliation(s)
- Veronica Quispe Yujra
- Department of Pathology, Federal University of São Paulo, UNIFESP, São Paulo, Brazil
| | | | - Marcos Mônico-Neto
- Department of Biosciences, Federal University of São Paulo, UNIFESP, Santos, Brazil
| | | | - Flavia de Oliveira
- Department of Biosciences, Federal University of São Paulo, UNIFESP, Santos, Brazil
| | - Marina Gomes Galvani
- Department of Biosciences, Federal University of São Paulo, UNIFESP, Santos, Brazil
| | - Kil Sun Lee
- Department of Biochemistry, Federal University of São Paulo, UNIFESP, São Paulo, Brazil
| | | | - Daniel Araki Ribeiro
- Department of Biosciences, Federal University of São Paulo, UNIFESP, Santos, Brazil
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10
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Xu S, Fan Y, Wu T, Xu P. Expression levels and significance of miR-184 and miR-126 in burned rats. Exp Ther Med 2019; 18:483-488. [PMID: 31281441 PMCID: PMC6591497 DOI: 10.3892/etm.2019.7578] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 04/12/2019] [Indexed: 12/12/2022] Open
Abstract
Expression levels and significance of miR-184 and miR-126 in burned rats were investigated. A total of 30 healthy rats were selected to construct a burn rat model, and another 10 healthy rats as the control group. The modeled rats were divided into groups I, II and III according to burn area, 10 for each group. The reverse transcription-quantitative polymerase chain reaction (RT-q.PCR) was used to detect the expression of miR-184 and miR-126 in the serum of three groups of burned rats, and ELISA was employed to detect the expression levels in peripheral blood and the correlation. There was no difference in the expression levels of miR-184 and miR-126 among the four groups of rats before modeling (P>0.05). Those of miR-184 and miR-126 at each time point were lower than those at the previous one in groups I, II and III (P<0.05). There was no significant change in the expression levels of miR-184 and miR-126 in the control group (P>0.05). At the same time point, those of miR-184 and miR-126 decreased with the increase of burn degree, and the difference was statistically significant between every two groups (P<0.05). The results of Pearson's correlation analysis revealed that the expression level of miR-184 was positively correlated with that of miR-126 (r=0.832, P=0.002). miR-184 and miR-126 were positively correlated with burn degree (r=0.901, P=0.001, r=0.775, P=0.001) and time after burn (r=0.732, P=0.004, r=0.753, P=0.002). The expression levels of miR-184 and miR-126 decrease in burned rats. The changes of their levels may be used as a reference standard for clinical efficacy evaluation to evaluate burn degree, preventing burn wounds from deepening.
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Affiliation(s)
- Sida Xu
- Department of Plastic and Burn Surgery, Ningbo No. 2 Hospital, Ningbo, Zhejiang 315010, P.R. China
| | - Youfen Fan
- Department of Plastic and Burn Surgery, Ningbo No. 2 Hospital, Ningbo, Zhejiang 315010, P.R. China
| | - Tianbin Wu
- Department of Plastic and Burn Surgery, Ningbo No. 2 Hospital, Ningbo, Zhejiang 315010, P.R. China
| | - Pei Xu
- Department of Plastic and Burn Surgery, Ningbo No. 2 Hospital, Ningbo, Zhejiang 315010, P.R. China
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11
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Baptista VIDA, Quintana HT, Lazzarin MC, Benfato ID, De Carvalho FP, Le Sueur-Maluf L, De Oliveira CAM, Baptista JDS, De Oliveira F. Short time insulin treatment post burn improves elastic-collagen rearrangement and reepithelization. Connect Tissue Res 2019; 60:230-239. [PMID: 29929404 DOI: 10.1080/03008207.2018.1484916] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Extensive burn may cause acute resistance to insulin, which accentuates hypermetabolism, impairs glucose metabolism, immune dysfunction and risks of sepsis. To minimize these effects, insulin is used as a treatment. The purpose was to analyze the collagen-elastic arrangement effects of insulin on the burned skin. Wistar rats were assigned in groups: control (C); control with insulin (C + I); scald burn injury (SBI); and SBI with insulin (SBI+ I). SBI were submitted to 45% total body surface area burn and the insulin-treated groups received insulin (5 UI/Kg/day) for 4 or 14 days (d). Insulin levels, glucose tolerance test and HOMA index were determined. The skin sections were analyzed for histophatological and morphoquantitative data. Histopathological findings showed increased reepithelization of SBI+ I and formation of a new muscle layer after 14 days. In the collagen-elastic arrangement, insulin for 4 days increased the volume fraction (Vv) of thin collagen and elastic fibers. After 14 days, independently of injury, insulin decreased the elastic fibers. Insulin was able to reverse damages in the collagen-elastic rearrangement and stimulate reepithelization after 4 days. Untreated scald-burned animals showed higher Vv of thick collagen after 4 days, while those treated had a higher Vv of thin collagen. The Vv of elastic fibers was increased in SBI+ I for 4 days. In conclusion, insulin treatment was able to stimulate reepithelization. It also reversed the damages to the collagen-elastic arrangement in the scald-burned group, improving the organization of thin collagen and increasing the Vv of elastic fibers in the injured group treated with insulin for a short time, that is, for 4 days.
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Affiliation(s)
| | | | - Mariana Cruz Lazzarin
- a Department of Biosciences , Federal University of São Paulo, UNIFESP , SP , Brazil
| | - Izabelle Dias Benfato
- a Department of Biosciences , Federal University of São Paulo, UNIFESP , SP , Brazil
| | | | | | | | | | - Flavia De Oliveira
- a Department of Biosciences , Federal University of São Paulo, UNIFESP , SP , Brazil
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12
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Pin F, Bonetto A, Bonewald LF, Klein GL. Molecular Mechanisms Responsible for the Rescue Effects of Pamidronate on Muscle Atrophy in Pediatric Burn Patients. Front Endocrinol (Lausanne) 2019; 10:543. [PMID: 31447786 PMCID: PMC6692456 DOI: 10.3389/fendo.2019.00543] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 07/19/2019] [Indexed: 12/25/2022] Open
Abstract
Not only has pamidronate been shown to prevent inflammation associated bone resorption following burn injury, it also reduces protein breakdown in muscle. The aim of this study was to identify the molecular mechanisms responsible for muscle mass rescue in pamidronate treated compared to placebo/standard of care-treated burn patients. Mature myotubes, generated by differentiating murine C2C12 myoblasts, were exposed for 48 h to 1 or 5% serum obtained from 3 groups of children: normal unburned, burned receiving standard of care, and burned receiving standard of care with pamidronate. Exposure to serum from burned patients caused dose-dependent myotube atrophy compared to normal serum as expected based on previous observations of muscle atrophy induced by burn injury in humans and animals. The size of C2C12 myotubes was partially protected upon exposure to the serum from patients treated with pamidronate correlating with the rescue of muscle size previously observed in these patients. At the molecular signaling level, serum from both pamidronate and non-pamidronate-treated burn patients increased pSTAT3/STAT3 and pERK1/2/ERK1/2 compared to normal serum with no significant differences between the two groups of burn patients indicating elevated production of inflammatory cytokines. However, serum from pamidronate-treated patients restored the phosphorylation of AKT and mTOR and reduced protein ubiquitination when compared to burn serum alone, suggesting a prevention of muscle catabolism and a restoration of muscle anabolism. Myotube atrophy induced by burn serum was partially rescued after exposure to a pan anti-TGFβ-1/2/3 antibody, suggesting that this signaling pathway is partially responsible for the atrophy and that bisphosphonate protection of bones from resorption during burn injury prevents the release of muscle pro-catabolic factors such as TGFβ into the circulation.
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Affiliation(s)
- Fabrizio Pin
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN, United States
- Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Andrea Bonetto
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN, United States
- Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
- Simon Cancer Center, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Otolaryngology—Head and Neck Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Lynda F. Bonewald
- Department of Anatomy and Cell Biology, Indiana University School of Medicine, Indianapolis, IN, United States
- Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN, United States
- Department of Orthopaedic Surgery, Indiana University School of Medicine, Indianapolis, IN, United States
| | - Gordon L. Klein
- Department of Orthopaedic Surgery, University of Texas Medical Branch, Galveston, TX, United States
- *Correspondence: Gordon L. Klein
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ER stress and subsequent activated calpain play a pivotal role in skeletal muscle wasting after severe burn injury. PLoS One 2017; 12:e0186128. [PMID: 29028830 PMCID: PMC5640216 DOI: 10.1371/journal.pone.0186128] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 09/11/2017] [Indexed: 12/24/2022] Open
Abstract
Severe burns are typically followed by hypermetabolism characterized by significant muscle wasting, which causes considerable morbidity and mortality. The aim of the present study was to explore the underlying mechanisms of skeletal muscle damage/wasting post-burn. Rats were randomized to the sham, sham+4-phenylbutyrate (4-PBA, a pharmacological chaperone promoting endoplasmic reticulum (ER) folding/trafficking, commonly considered as an inhibitor of ER), burn (30% total body surface area), and burn+4-PBA groups; and sacrificed at 1, 4, 7, 14 days after the burn injury. Tibial anterior muscle was harvested for transmission electron microscopy, calcium imaging, gene expression and protein analysis of ER stress / ubiquitin-proteasome system / autophagy, and calpain activity measurement. The results showed that ER stress markers were increased in the burn group compared with the sham group, especially at post-burn days 4 and 7, which might consequently elevate cytoplasmic calcium concentration, promote calpain production as well as activation, and cause skeletal muscle damage/wasting of TA muscle after severe burn injury. Interestingly, treatment with 4-PBA prevented burn-induced ER swelling and altered protein expression of ER stress markers and calcium release, attenuating calpain activation and skeletal muscle damage/wasting after severe burn injury. Atrogin-1 and LC3-II/LC3-I ratio were also increased in the burn group compared with the sham group, while MuRF-1 remained unchanged; 4-PBA decreased atrogin-1 in the burn group. Taken together, these findings suggested that severe burn injury induces ER stress, which in turns causes calpain activation. ER stress and subsequent activated calpain play a critical role in skeletal muscle damage/wasting in burned rats.
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Experimental Periodontitis in the Potentialization of the Effects of Immobilism in the Skeletal Striated Muscle. Inflammation 2017; 40:2000-2011. [PMID: 28822015 DOI: 10.1007/s10753-017-0640-3] [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] [Indexed: 12/23/2022]
Abstract
This study aims to evaluate if ligature-induced periodontitis can potentiates the deleterious effects of immobilization in the skeletal striated muscle, contributing to the development of muscle atrophy due to disuse. Forty Wistar rats were divided into four groups: (1) Control Group (CG), (2) Periodontal Disease (PDG), (3) Immobilized (IG), and (4) Immobilized with Periodontal Disease (IPDG). Periodontal disease was induced for 30 days, with ligature method, and the immobilization was performed with cast bandage for 15 days. Prior to euthanasia, nociceptive threshold and muscular grasping force were evaluated. Afterwards, the soleus muscle was dissected and processed for sarcomere counting and morphological/morphometric analysis. For data analysis, was used the one-way ANOVA and post-test Tukey (p < 0.05). The IG and IPDG presented lower muscle weight, lower muscular grip strength, and less number of sarcomeres compared to CG. The PDG showed reduction of muscle strength and nociceptive threshold after 15 days of periodontal disease and increased connective tissue compared to CG. The IPDG presented lower muscle length and nociceptive threshold. The IG presented reduction in cross-sectional area and smaller diameter, increase in the number of nuclei and a nucleus/fiber ratio, decrease in the number of capillaries and capillary/fiber ratio, with increase in connective tissue. The IPDG had increased nucleus/fiber ratio, decreased capillaries, and increased connective tissue when compared to the IG. The IPDG presented greater muscle tissue degeneration and increased inflammatory cells compared to the other groups. Ligature-induced periodontitis potentiated the deleterious effects of immobilization of the skeletal striated muscle.
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15
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Lopes TDS, Quintana HT, Bortolin JA, Matos Alves PH, Bolina Matos RDS, Liberti EA, Oliveira FD. Protein Malnutrition Pre- and Postnatal and Nutritional Rehabilitation Modulates the Morphology of Muscle Fibers in Wistar Rats. J Diet Suppl 2017; 14:278-287. [PMID: 27558017 DOI: 10.1080/19390211.2016.1212960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
This study investigated the effects of pre- and postnatal conditions of protein deficiency followed to nutritional rehabilitation in the morphology of skeletal muscle. Twelve Wistar male rats were distributed in two groups: nourished (N), with normal protein diet and undernourished (U), with low protein diet. The respective diet was maintained until animals completed 21 days of life. After that, part of group U (n = 4) received normal protein diet, forming a third group, renourished group (R). Forty-two-day-old animals were euthanized and we performed histopathological and morphometric analysis of the soleus muscle. Analysis stained in hematoxylin and eosin (H&E) of the group N revealed polygonal and equidistant muscle fibers, with normal distribution in muscle fascicles. However, D group had rounded and disorganized fibers with different distances between them in muscle fascicles. R group presented muscle fibers with several formats, polygonal and rounded, and some muscle fascicles starting the reorganization process. In N group, analysis of the connective tissue showed predominance of type I collagen and a lower amount collagen type III, both well organized. Whereas U group had a predominance of disorganized type III collagen, in R group, there was return of type I collagen, but partially organized. Muscle fiber area of U (163.18 ± 52.55 μm2) and R (381.79 ± 26.62 μm2) groups was smaller than N (1229.2 μm2 ± 61.12 μm2). Muscle fibers density of groups U (3369 ± 1226 fibers/mm2) and R (1979 ± 28 fibers/mm2) was larger than N (830 ± 113 fibers/mm2). The nutritional rehabilitation in the present study showed an attempt of reorganization of the muscle tissue.
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Affiliation(s)
| | | | | | | | | | | | - Flavia de Oliveira
- a Department of Biosciences , Federal University of São Paulo , SP , Brazil
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16
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Nakazawa H, Chang K, Shinozaki S, Yasukawa T, Ishimaru K, Yasuhara S, Yu YM, Martyn JAJ, Tompkins RG, Shimokado K, Kaneki M. iNOS as a Driver of Inflammation and Apoptosis in Mouse Skeletal Muscle after Burn Injury: Possible Involvement of Sirt1 S-Nitrosylation-Mediated Acetylation of p65 NF-κB and p53. PLoS One 2017; 12:e0170391. [PMID: 28099528 PMCID: PMC5242494 DOI: 10.1371/journal.pone.0170391] [Citation(s) in RCA: 89] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 01/04/2017] [Indexed: 01/28/2023] Open
Abstract
Inflammation and apoptosis develop in skeletal muscle after major trauma, including burn injury, and play a pivotal role in insulin resistance and muscle wasting. We and others have shown that inducible nitric oxide synthase (iNOS), a major mediator of inflammation, plays an important role in stress (e.g., burn)-induced insulin resistance. However, it remains to be determined how iNOS induces insulin resistance. Moreover, the interrelation between inflammatory response and apoptosis is poorly understood, although they often develop simultaneously. Nuclear factor (NF)-κB and p53 are key regulators of inflammation and apoptosis, respectively. Sirt1 inhibits p65 NF-κB and p53 by deacetylating these transcription factors. Recently, we have shown that iNOS induces S-nitrosylation of Sirt1, which inactivates Sirt1 and thereby increases acetylation and activity of p65 NF-κB and p53 in various cell types, including skeletal muscle cells. Here, we show that iNOS enhances burn-induced inflammatory response and apoptotic change in mouse skeletal muscle along with S-nitrosylation of Sirt1. Burn injury induced robust expression of iNOS in skeletal muscle and gene disruption of iNOS significantly inhibited burn-induced increases in inflammatory gene expression and apoptotic change. In parallel, burn increased Sirt1 S-nitrosylation and acetylation and DNA-binding capacity of p65 NF-κB and p53, all of which were reversed or ameliorated by iNOS deficiency. These results indicate that iNOS functions not only as a downstream effector but also as an upstream enhancer of burn-induced inflammatory response, at least in part, by Sirt1 S-nitrosylation-dependent activation (acetylation) of p65 NF-κB. Our data suggest that Sirt1 S-nitrosylation may play a role in iNOS-mediated enhanced inflammatory response and apoptotic change, which, in turn, contribute to muscle wasting and supposedly to insulin resistance after burn injury.
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Affiliation(s)
- Harumasa Nakazawa
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
| | - Kyungho Chang
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
| | - Shohei Shinozaki
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
- Department of Geriatrics and Vascular Medicine, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Takashi Yasukawa
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
| | - Kazuhiro Ishimaru
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
| | - Shingo Yasuhara
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
| | - Yong-Ming Yu
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - J. A. Jeevendra Martyn
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
| | - Ronald. G. Tompkins
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
- Department of Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Kentaro Shimokado
- Department of Geriatrics and Vascular Medicine, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
| | - Masao Kaneki
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Charlestown, Massachusetts, United States of America
- Shriners Hospitals for Children, Boston, Massachusetts, United States of America
- * E-mail:
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17
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Fry CS, Porter C, Sidossis LS, Nieten C, Reidy PT, Hundeshagen G, Mlcak R, Rasmussen BB, Lee JO, Suman OE, Herndon DN, Finnerty CC. Satellite cell activation and apoptosis in skeletal muscle from severely burned children. J Physiol 2016; 594:5223-36. [PMID: 27350317 PMCID: PMC5023709 DOI: 10.1113/jp272520] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Accepted: 05/24/2016] [Indexed: 02/06/2023] Open
Abstract
KEY POINTS Severe burns result in profound skeletal muscle atrophy that hampers recovery. The activity of skeletal muscle stem cells, satellite cells, acutely following a severe burn is unknown and may contribute to the recovery of lean muscle. Severe burn injury induces skeletal muscle regeneration and myonuclear apoptosis. Satellite cells undergo concurrent apoptosis and activation acutely following a burn, with a net reduction in satellite cell content compared to healthy controls. The activation and apoptosis of satellite cells probably impacts the recovery of lean tissue following a severe burn, contributing to prolonged frailty in burn survivors. ABSTRACT Severe burns result in profound skeletal muscle atrophy; persistent muscle loss and weakness are major complications that hamper recovery from burn injury. Many factors contribute to the erosion of muscle mass following burn trauma and we propose that an impaired muscle satellite cell response is key in the aetiology of burn-induced cachexia. Muscle biopsies from the m. vastus lateralis were obtained from 12 male pediatric burn patients (>30% total body surface area burn) and 12 young, healthy male subjects. Satellite cell content, activation and apoptosis were determined via immunohistochemistry, as were muscle fibre regeneration and myonuclear apoptosis. Embryonic myosin heavy chain expression and central nucleation, indices of skeletal muscle regeneration, were elevated in burn patients (P < 0.05). Myonuclear apoptosis, quantified by TUNEL positive myonuclei and cleaved caspase-3 positive myonuclei, was also elevated in burn patients (P < 0.05). Satellite cell content was reduced in burn patients, with approximately 20% of satellite cells positive for TUNEL staining, indicating DNA damage associated with apoptosis (P < 0.05). Additionally, a significant percentage of satellite cells in burn patients expressed Ki67, a marker for cellular proliferation (P < 0.05). Satellite cell activation was also observed in burn patients with increased expression of MyoD compared to healthy controls (P < 0.05). Robust skeletal muscle atrophy occurs after burn injury, even in muscles located distally to the site of injury. The activation and apoptosis of satellite cells probably impacts the recovery of lean tissue following a severe burn, contributing to prolonged frailty in burn survivors.
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Affiliation(s)
- Christopher S Fry
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, TX, USA.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - Craig Porter
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - Labros S Sidossis
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - Christopher Nieten
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - Paul T Reidy
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, TX, USA
| | - Gabriel Hundeshagen
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - Ronald Mlcak
- Shriners Hospitals for Children, Galveston, TX, USA
| | - Blake B Rasmussen
- Department of Nutrition and Metabolism, University of Texas Medical Branch, Galveston, TX, USA.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA
| | - Jong O Lee
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - Oscar E Suman
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - David N Herndon
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA.,Shriners Hospitals for Children, Galveston, TX, USA
| | - Celeste C Finnerty
- Department of Surgery, University of Texas Medical Branch, Galveston, TX, USA. .,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA. .,Shriners Hospitals for Children, Galveston, TX, USA.
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18
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Gómez-SanMiguel AB, Gomez-Moreira C, Nieto-Bona MP, Fernández-Galaz C, Villanúa MÁ, Martín AI, López-Calderón A. Formoterol decreases muscle wasting as well as inflammation in the rat model of rheumatoid arthritis. Am J Physiol Endocrinol Metab 2016; 310:E925-37. [PMID: 27245339 DOI: 10.1152/ajpendo.00503.2015] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 03/27/2016] [Indexed: 12/19/2022]
Abstract
Adjuvant-induced arthritis is an experimental model of rheumatoid arthritis that is associated with body weight loss and muscle wasting. β2-adrenergic receptor agonists are powerful anabolic agents that trigger skeletal muscle hypertrophy and have been proposed as a promising treatment for muscle wasting in human patients. The aim of this work was to determine whether formoterol, a selective β2-adrenoreceptor agonist, is able to ameliorate muscle wasting in arthritic rats. Arthritis was induced in male Wistar rats by intradermal injection of Freund's adjuvant. Control and arthritic rats were injected daily with 50 μg/kg sc formoterol or saline for 12 days. Body weight change, food intake, and arthritis index were analyzed. After euthanasia, in the gastrocnemius mRNA was analyzed by PCR, and proteins were analyzed by Western blotting. Arthritis decreased gastrocnemius weight, cross-sectional area, and myofiber size, whereas formoterol increased those variables in both arthritic and control rats. Formoterol decreased the external signs of arthritis as well as NF-κB(p65) activation, TNFα, and COX-2 levels in the gastrocnemius of arthritic and control rats. Those effects of formoterol were associated with a decreased expression of myostatin, atrogin-1, and MuRF1 and in LC3b lipidation. Arthritis increased the expression of MyoD, myogenin, IGF-I, and IGFBP-3 and -5 in the gastrocnemius. In control and in arthritic rats, treatment with formoterol increased Akt phosphorylation and myogenin levels, whereas it decreased IGFBP-3 expression in the gastrocnemius. These data suggest that formoterol has an anti-inflammatory effect and decreases muscle wasting in arthritic rats through increasing Akt activity and myogenin and decreasing myostatin, the p-NF-κB(p65)/TNF pathway, and IGFBP-3.
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Affiliation(s)
| | - Carolina Gomez-Moreira
- Department of Physiology, Faculty of Medicine, Complutense University, Madrid, Spain; and
| | - María Paz Nieto-Bona
- Department of Basic Sciences in Health, Faculty of Health Sciences, Rey Juan Carlos University, Madrid, Spain
| | - Carmen Fernández-Galaz
- Department of Physiology, Faculty of Medicine, Complutense University, Madrid, Spain; and
| | - Maria Ángeles Villanúa
- Department of Physiology, Faculty of Medicine, Complutense University, Madrid, Spain; and
| | - Ana Isabel Martín
- Department of Physiology, Faculty of Medicine, Complutense University, Madrid, Spain; and
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Ahn J, Kim SG, Kim MK, Kim DW, Lee JH, Seok H, Choi JY. Topical delivery of 4-hexylresorcinol promotes wound healing via tumor necrosis factor-α suppression. Burns 2016; 42:1534-1541. [PMID: 27198070 DOI: 10.1016/j.burns.2016.04.016] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2016] [Revised: 04/04/2016] [Accepted: 04/22/2016] [Indexed: 01/09/2023]
Abstract
OBJECTIVE The objective of this study was to evaluate (1) the effect of 4-hexylresorcinol (4HR) application on TNF-α expression in RAW264.7 cells and (2) the effect of 4HR ointment on burn wound healing in a rat burn wound model. MATERIALS AND METHODS RAW264.7 cells were cultured in the presence of different concentrations of 4HR, and the attached cells were sampled for western blot analysis at each time point. Animal studies were conducted on male Wistar rats (n=24). Three treatment groups were evaluated in this study: (1) treatment with ointment alone (negative control), (2) treatment with ointment containing 0.2wt% 4HR, and (3) treatment with ointment containing 2wt% 4HR. For the assessment of wound healing, digital photographs were taken at 1, 5, and 14 days. Animals were sacrificed at 1, 5, and 14 days for histological examination or ELISA analysis. RESULTS Western blot analysis showed that TNF-α protein levels were reduced following treatment with 4HR at concentrations between 1 and 10μg/mL. In animal studies, the average denuded area 14 days after burn was smaller in the 2wt% 4HR treatment group compared with the control group (P=0.022). Immunohistochemical analysis revealed lower TNF-α expression in the 2wt% 4HR treatment group compared with the control group 14 days after burn (P=0.027). CONCLUSION 4HR reduced TNF-α expression in RAW264.7 cells and in the burn wounds of rats. Burn wounds dressed with ointment containing 4HR also exhibited rapid epithelization and collagen regeneration.
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Affiliation(s)
- Janghoon Ahn
- Department of Dentistry, College of Medicine, Hallym University, Chuncheon, Republic of Korea
| | - Seong-Gon Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea.
| | - Min-Keun Kim
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Dae-Won Kim
- Department of Oral Biochemistry, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Jang-Ha Lee
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Hyun Seok
- Department of Oral and Maxillofacial Surgery, College of Dentistry, Gangneung-Wonju National University, Gangneung, Republic of Korea
| | - Je-Yong Choi
- Department of Biochemistry & Cell Biology, BK21 Plus KNU Biomedical Convergence Program, School of Medicine, Kyungpook National University, Daegu, Republic of Korea
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20
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Saeman MR, DeSpain K, Liu MM, Wolf SE, Song J. Severe burn increased skeletal muscle loss in mdx mutant mice. J Surg Res 2016; 202:372-9. [PMID: 27229112 DOI: 10.1016/j.jss.2016.02.037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/29/2016] [Accepted: 02/26/2016] [Indexed: 01/30/2023]
Abstract
BACKGROUND Severe burn causes muscle mass loss and atrophy. The balance between muscle cell death and growth maintains tissue homeostasis. We hypothesize that preexisting cellular structural defects will exacerbate skeletal muscle mass loss after burn. Using a Duchenne muscular dystrophy (mdx) mutant mouse, we investigated whether severe burn caused more damage in skeletal muscle with preexisting muscle disease. METHODS The mdx mice and wild-type (WT) mice received 25% total body surface area scald burn. Gastrocnemius (GM), tibialis anterior, and gluteus muscles were obtained at days 1 and 3 after burn. GM muscle function was measured on day 3. Animals without burn served as controls. RESULTS Wet tissue weight significantly decreased in tibialis anterior and gluteus in both mdx and WT mice after burn (P < 0.05). The ratio of muscle to body weight decreased in mdx mutant mice (P < 0.05) but not WT. Isometric force was significantly lower in mdx GM, and this difference persisted after burn (P < 0.05). Caspase-3 activity increased significantly after burn in both the groups, whereas HMGB1 expression was higher in burn mdx mice (P < 0.05). Proliferating cell nuclear antigen decreased significantly in mdx mice (P < 0.05). Myogenic markers pax7, myoD, and myogenin increased after burn in both the groups and were higher in mdx mice (P < 0.05). CONCLUSIONS More muscle loss occurred in response to severe burn in mdx mutant mice. Cell turnover in mdx mice after burn is differed from WT. Although markers of myogenic activation are elevated in mdx mutant mice, the underlying muscle pathophysiology is less tolerant of traumatic injury.
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Affiliation(s)
- Melody R Saeman
- Division of Burn/Trauma/Critical Care, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Kevin DeSpain
- Division of Burn/Trauma/Critical Care, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Ming-Mei Liu
- Division of Burn/Trauma/Critical Care, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Steven E Wolf
- Division of Burn/Trauma/Critical Care, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Juquan Song
- Division of Burn/Trauma/Critical Care, Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas.
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21
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Akscyn RM, Franklin JL, Gavrikova TA, Messina JL. Skeletal muscle atrogene expression and insulin resistance in a rat model of polytrauma. Physiol Rep 2016; 4:4/2/e12659. [PMID: 26818585 PMCID: PMC4760393 DOI: 10.14814/phy2.12659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Polytrauma is a combination of injuries to more than one body part or organ system. Polytrauma is common in warfare, and in automobile and industrial accidents. The combination of injuries can include burn, fracture, hemorrhage, and trauma to the extremities or specific organ systems. Resistance to anabolic hormones, loss of muscle mass, and metabolic dysfunction can occur following injury. To investigate the effects of combined injuries, we have developed a highly reproducible rodent model of polytrauma. This model combines burn injury, soft tissue trauma, and penetrating injury to the gastrointestinal (GI) tract. Adult, male Sprague–Dawley rats were anesthetized with pentobarbital and subjected to a 15–20% total body surface area scald burn, or laparotomy and a single puncture of the cecum with a G30 needle, or the combination of both injuries (polytrauma). In the current studies, the inflammatory response to polytrauma was examined in skeletal muscle. Changes in skeletal muscle mRNA levels of the proinflammatory cytokines TNF‐α, IL‐1β, and IL‐6 were observed following single injuries and polytrauma. Increased expression of the E3 ubiquitin ligases Atrogin‐1/FBX032 and TRIM63/MuRF‐1 were measured following injury, as was skeletal muscle insulin resistance, as evidenced by decreased insulin‐inducible insulin receptor (IR) and AKT/PKB (Protein Kinase B) phosphorylation. Changes in the abundance of IR and insulin receptor substrate‐1 (IRS‐1) were observed at the protein and mRNA levels. Additionally, increased TRIB3 mRNA levels were observed 24 h following polytrauma, the same time when insulin resistance was observed. This may suggest a role for TRIB3 in the development of acute insulin resistance following injury.
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Affiliation(s)
- Robert M Akscyn
- Department of Pathology, Division of Molecular and Cellular Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - John L Franklin
- Department of Pathology, Division of Molecular and Cellular Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Tatyana A Gavrikova
- Department of Pathology, Division of Molecular and Cellular Pathology, University of Alabama at Birmingham, Birmingham, Alabama
| | - Joseph L Messina
- Department of Pathology, Division of Molecular and Cellular Pathology, University of Alabama at Birmingham, Birmingham, Alabama Vetrans Affairs Medical Center, Birmingham, Alabama
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Xu W, Bai K, He J, Su W, Dong L, Zhang L, Wang T. Leucine improves growth performance of intrauterine growth retardation piglets by modifying gene and protein expression related to protein synthesis. Nutrition 2016; 32:114-21. [DOI: 10.1016/j.nut.2015.07.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2014] [Revised: 05/31/2015] [Accepted: 07/07/2015] [Indexed: 01/10/2023]
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Saeman MR, DeSpain K, Liu MM, Carlson BA, Song J, Baer LA, Wade CE, Wolf SE. Effects of exercise on soleus in severe burn and muscle disuse atrophy. J Surg Res 2015; 198:19-26. [PMID: 26104324 DOI: 10.1016/j.jss.2015.05.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 05/11/2015] [Accepted: 05/21/2015] [Indexed: 01/18/2023]
Abstract
BACKGROUND Muscle loss is a sequela of severe burn and critical illness with bed rest contributing significantly to atrophy. We hypothesize that exercise will mitigate muscle loss after burn with bed rest. MATERIALS AND METHODS Male rats were assigned to sham ambulatory (S/A), burn ambulatory (B/A), sham hindlimb unloading (S/H), or burn hindlimb unloading (B/H). Rats received a 40% scald burn or sham and were ambulatory or placed in hindlimb unloading, a model of bed rest. Half from each group performed twice daily resistance climbing. Hindlimb isometric forces were measured on day 14. RESULTS Soleus mass and muscle function were not affected by burn alone. Mass was significantly lower in hindlimb unloading (79 versus 139 mg, P < 0.001) and no exercise (103 versus 115 mg, P < 0.01). Exercise significantly increased soleus mass in B/H (86 versus 77 mg, P < 0.01). Hindlimb unloading significantly decreased muscle force in the twitch (12 versus 31 g, P < 0.001), tetanic (55 versus 148 g, P < 0.001), and specific tetanic measurements (12 versus 22 N/cm(2), P < 0.001). Effects of exercise on force depended on other factors. In B/H, exercise significantly increased twitch (14 versus 8 g, P < 0.05) and specific tetanic force (14 versus 7 N/cm(2), P < 0.01). Fatigue index was lower in ambulatory (55%) and exercise (52%) versus hindlimb (69%, P = 0.03) and no exercise (73%, P = 0.002). CONCLUSIONS Hindlimb unloading is a significant factor in muscle atrophy. Exercise increased the soleus muscle mass, twitch, and specific force in this model. However, the fatigue index decreased with exercise in all groups. This suggests exercise contributes to functional muscle change in this model of disuse and critical illness.
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Affiliation(s)
- Melody R Saeman
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas.
| | - Kevin DeSpain
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Ming-Mei Liu
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Brett A Carlson
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Juquan Song
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
| | - Lisa A Baer
- Department of Surgery, University of Texas Health Science Center at Houston, Houston, Texas
| | - Charles E Wade
- Department of Surgery, University of Texas Health Science Center at Houston, Houston, Texas
| | - Steven E Wolf
- Department of Surgery, University of Texas Southwestern Medical Center, Dallas, Texas
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