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Rigo B, Bateman A, Lee J, Kim H, Lee Y, Romero L, Jang YC, Herbert R, Yeo WH. Soft implantable printed bioelectronic system for wireless continuous monitoring of restenosis. Biosens Bioelectron 2023; 241:115650. [PMID: 37717424 DOI: 10.1016/j.bios.2023.115650] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 08/29/2023] [Indexed: 09/19/2023]
Abstract
Atherosclerosis is a prominent cause of coronary artery disease and broader cardiovascular diseases, the leading cause of death worldwide. Angioplasty and stenting is a common treatment, but in-stent restenosis, where the artery re-narrows, is a frequent complication. Restenosis is detected through invasive procedures and is not currently monitored frequently for patients. Here, we report an implantable vascular bioelectronic device using a newly developed miniaturized strain sensor via microneedle printing methods. A capillary-based printing system achieves high-resolution patterning of a soft, capacitive strain sensor. Ink and printing parameters are evaluated to create a fully printed sensor, while sensor design and sensing mechanism are studied to enhance sensitivity and minimize sensor size. The sensor is integrated with a wireless vascular stent, offering a biocompatible, battery-free, wireless monitoring system compatible with conventional catheterization procedures. The vascular sensing system is demonstrated in an artery model for monitoring restenosis progression. Collectively, the artery implantable bioelectronic system shows the potential for wireless, real-time monitoring of various cardiovascular diseases and stent-integrated sensing/treatments.
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Affiliation(s)
- Bruno Rigo
- IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Allison Bateman
- IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Jimin Lee
- IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Hyeonseok Kim
- IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Yunki Lee
- Department of Orthopaedics, Emory Musculoskeletal Institute, Emory University School of Medicine, Atlanta, GA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, 30332, USA; Atlanta VA Medical Center, Decatur, GA, USA; Parker H. Petit Institute for Bioengineering and Biosciences, Institute for Materials, Neural Engineering Center, and Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Lissette Romero
- IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; School of Industrial Design, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Young C Jang
- Department of Orthopaedics, Emory Musculoskeletal Institute, Emory University School of Medicine, Atlanta, GA, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, 30332, USA; Atlanta VA Medical Center, Decatur, GA, USA; Parker H. Petit Institute for Bioengineering and Biosciences, Institute for Materials, Neural Engineering Center, and Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Robert Herbert
- IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
| | - Woon-Hong Yeo
- IEN Center for Human-Centric Interfaces and Engineering at the Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA, 30332, USA; Parker H. Petit Institute for Bioengineering and Biosciences, Institute for Materials, Neural Engineering Center, and Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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Shit A, Park S, Lee Y, Ryplida B, Morgan N, Jang YC, Jin EJ, Park SY. Stimuli-responsive pressure-strain sensor-based conductive hydrogel for alleviated non-alcoholic fatty liver disease by scavenging reactive oxygen species in adipose tissue. Acta Biomater 2023; 171:406-416. [PMID: 37739252 DOI: 10.1016/j.actbio.2023.09.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/28/2023] [Accepted: 09/17/2023] [Indexed: 09/24/2023]
Abstract
A visible light- and reactive oxygen species (ROS)-responsive pressure/strain sensor based on carbon dot (CD)-loaded conductive hydrogel was developed for detecting high-fat diet (HFD) and preventing the risk of non-alcoholic fatty liver disease. The designed nanoparticle consisted of a diselenide polymer dot (dsPD) loaded with a visible light-responsive CD to form dsPD@CD (DSCD). The influence of visible light irradiation and ROS on DSCD facilitated the electron transport, enhancing the conductivity of DSCD-embedded hydrogel (DSCD hydrogel) from 1.3 to 35.9 mS/m. Alternatively, the tensile modulus of the DSCD hydrogel enhanced to 223 % after light-induced ROS treatment, which simultaneously impacted the capacitive response (120 %). The hydrogel implantation into inguinal white adipose tissue of HFD mice showed 82 % higher conductivity and 83 % enhanced pressure sensing response to HFD-generated high ROS levels compared with the normal diet-fed mice. Additionally, the ROS scavenging activity of DSCD hydrogel was confirmed by the downregulation of ROS-responsive genes, such as Sod2, Nrf2, and catalase (Cat) in murine primary hepatocytes isolated from fatty liver-induced mice. In addition, in vivo animal studies also confirmed the suppression of hepatic lipogenesis, as shown by decreased Pparγ and Fasn expression and hypertrophy of adipocytes in HFD mice. The distinguishable real-time wireless resistance response observed with pressure sensing indicates the potential application of the device for monitoring the risk of non-alcoholic fatty liver disease. STATEMENT OF SIGNIFICANCE: A visible-light-induced ROS-responsive carbon dot-loaded conductive hydrogel was developed for the detection of HFD-induced alterations in ROS levels by evaluating the conductivity and electrochemical responses with applied pressure/strain. The implanted hydrogel facilitates the recovery of the inflated adipocytes induced by NAFLD, which reduces fat accumulation in the liver, preventing the risk of NAFLD. Real-time detection based on the resistance response during local compression of the hydrogel is possibly performed utilizing a wireless sensing device, demonstrating the ease of NAFLD monitoring.
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Affiliation(s)
- Arnab Shit
- Department of Chemical and Biological Engineering, Korea National University of Transportation, Chungju 27469, Republic of Korea
| | - Sujeong Park
- Department of Biological Sciences, College of Natural Sciences, Wonkwang University, Iksan, Chunbuk 54538, Republic of Korea
| | - Yunki Lee
- Department of Orthopaedics, Emory Musculoskeletal Institute, Emory University School of Medicine, Atlanta, GA, USA
| | - Benny Ryplida
- Department of Chemical and Biological Engineering, Korea National University of Transportation, Chungju 27469, Republic of Korea
| | - Nyssa Morgan
- School of Biological Science, Wallace H. Coulter Department of Biomedical Engineering, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Young C Jang
- Department of Orthopaedics, Emory Musculoskeletal Institute, Emory University School of Medicine, Atlanta, GA, USA; School of Biological Science, Wallace H. Coulter Department of Biomedical Engineering, Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Eun-Jung Jin
- Department of Biological Sciences, College of Natural Sciences, Wonkwang University, Iksan, Chunbuk 54538, Republic of Korea.
| | - Sung Young Park
- Department of Chemical and Biological Engineering, Korea National University of Transportation, Chungju 27469, Republic of Korea; Department of IT and Energy Convergence (BK21 FOUR), Korea National University of Transportation, Chungju 27469, Republic of Korea.
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3
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Lee J, Myrie NO, Jeong GJ, Han WM, Jang YC, García AJ, Emelianov S. In vivo shear wave elasticity imaging for assessment of diaphragm function in muscular dystrophy. Acta Biomater 2023; 168:277-285. [PMID: 37453552 PMCID: PMC10540053 DOI: 10.1016/j.actbio.2023.07.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Revised: 06/28/2023] [Accepted: 07/10/2023] [Indexed: 07/18/2023]
Abstract
Duchenne muscular dystrophy (DMD) causes patients to suffer from ambulatory disability and cardiorespiratory failure, the latter of which leads to premature death. Due to its role in respiration, the diaphragm is an important muscle for study. A common method for evaluating diaphragm function is ex vivo force testing, which only allows for an end point measurement. In contrast, ultrasound shear wave elastography imaging (US-SWEI) can assess diaphragm function over time; however, US-SWEI studies in dystrophic patients to date have focused on the limbs without preclinical studies. In this work, we used US-SWEI to estimate the shear wave speed (SWS) in diaphragm muscles of healthy (WT) mice, mdx mice, and mdx mice haploinsufficient for utrophin (mdx-utr) at 6 and 12 months of age. Diaphragms were then subjected to ex vivo force testing and histological analysis at 12 months of age. Between 6 and 12 months, a 23.8% increase in SWS was observed in WT mice and a 27.8% increase in mdx mice, although no significant difference was found in mdx-utr mice. Specific force generated by mdx-utr diaphragms was lower than that of WT diaphragms following twitch stimulus. A strong correlation between SWS and collagen deposition was observed, as well as between SWS and muscle fiber size. Together, these data demonstrate the ability of US-SWEI to evaluate dystrophic diaphragm functionality over time and predict the biochemical and morphological make-up of the diaphragm. Additionally, our results highlight the advantage of US-SWEI over ex vivo testing by obtaining longitudinal measurements in the same subject. STATEMENT OF SIGNIFICANCE: In DMD patients, muscles experience cycles of regeneration and degeneration that contribute to chronic inflammation and muscle weakness. This pathology only worsens with time and leads to muscle wasting, including in respiratory and cardiac muscles. Because respiratory failure is a major contributor to premature death in DMD patients, the diaphragm muscle is an important muscle to evaluate and treat over time. Currently, diaphragm function is assessed using ex vivo force testing, a technique that only allows measurement at sacrifice. In contrast, ultrasonography, particularly shear wave elasticity imaging (USSWEI), is a promising tool for longitudinal assessment; however, most US-SWEI in DMD patients aimed for limb muscles only with the absence of preclinical studies. This work broadens the applications of US-SWE imaging by demonstrating its ability to track properties and function of dystrophic diaphragm muscles longitudinally in multiple dystrophic mouse models.
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Affiliation(s)
- Jeehyun Lee
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Nia O Myrie
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA
| | - Gun-Jae Jeong
- Institute of Cell and Tissue Engineering, The Catholic University of Korea, Seoul 06591, Republic of Korea
| | - Woojin M Han
- Department of Orthopedics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Young C Jang
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA; Department of Orthopedics, Emory Musculoskeletal Institute, Emory School of Medicine, Atlanta, GA 30329, USA.
| | - Andrés J García
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
| | - Stanislav Emelianov
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA; Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332, USA.
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Hymel LA, Anderson SE, Turner TC, York WY, Zhang H, Liversage AR, Lim HS, Qiu P, Mortensen LJ, Jang YC, Willett NJ, Botchwey EA. Identifying dysregulated immune cell subsets following volumetric muscle loss with pseudo-time trajectories. Commun Biol 2023; 6:749. [PMID: 37468760 PMCID: PMC10356763 DOI: 10.1038/s42003-023-04790-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/31/2023] [Indexed: 07/21/2023] Open
Abstract
Volumetric muscle loss (VML) results in permanent functional deficits and remains a substantial regenerative medicine challenge. A coordinated immune response is crucial for timely myofiber regeneration, however the immune response following VML has yet to be fully characterized. Here, we leveraged dimensionality reduction and pseudo-time analysis techniques to elucidate the cellular players underlying a functional or pathological outcome as a result of subcritical injury or critical VML in the murine quadriceps, respectively. We found that critical VML resulted in a sustained presence of M2-like and CD206hiLy6Chi 'hybrid' macrophages whereas subcritical defects resolved these populations. Notably, the retained M2-like macrophages from critical VML injuries presented with aberrant cytokine production which may contribute to fibrogenesis, as indicated by their co-localization with fibroadipogenic progenitors (FAPs) in areas of collagen deposition within the defect. Furthermore, several T cell subpopulations were significantly elevated in critical VML compared to subcritical injuries. These results demonstrate a dysregulated immune response in critical VML that is unable to fully resolve the chronic inflammatory state and transition to a pro-regenerative microenvironment within the first week after injury. These data provide important insights into potential therapeutic strategies which could reduce the immune cell burden and pro-fibrotic signaling characteristic of VML.
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Affiliation(s)
- Lauren A Hymel
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Shannon E Anderson
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Thomas C Turner
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - William Y York
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Hongmanlin Zhang
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Adrian R Liversage
- School of Chemical, Materials, and Biomedical Engineering, University of Georgia, Athens, GA, USA
- Regenerative Bioscience Center, Rhodes Center for ADS, University of Georgia, Athens, GA, USA
| | - Hong Seo Lim
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Peng Qiu
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Luke J Mortensen
- School of Chemical, Materials, and Biomedical Engineering, University of Georgia, Athens, GA, USA
- Regenerative Bioscience Center, Rhodes Center for ADS, University of Georgia, Athens, GA, USA
| | - Young C Jang
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
- Department of Orthopaedics, Emory University, Atlanta, GA, USA.
| | - Nick J Willett
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA.
- Department of Orthopaedics, Emory University, Atlanta, GA, USA.
- Atlanta Veterans Affairs Medical Center, Decatur, GA, USA.
- Phil and Penny Knight Campus for Accelerating Scientific Impact, University of Oregon, Eugene, OR, USA.
- The Veterans Affairs Portland Health Care System, Portland, OR, USA.
| | - Edward A Botchwey
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA.
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Ko J, Jang YC, Quindry J, Guttmann R, Cosio-Lima L, Powers SK, Lee Y. Exercise-Induced Antisenescence and Autophagy Restoration Mitigate Metabolic Disorder-Induced Cardiac Disruption in Mice. Med Sci Sports Exerc 2023; 55:376-388. [PMID: 36251370 DOI: 10.1249/mss.0000000000003058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
INTRODUCTION Metabolic disorder promotes premature senescence and poses more severe cardiac dysfunction in females than males. Although endurance exercise (EXE) has been known to confer cardioprotection against metabolic diseases, whether EXE-induced cardioprotection is associated with mitigating senescence in females remains unknown. Thus, the aim of the present study was to examine metabolic disorder-induced cardiac anomalies (cellular senescence, metabolic signaling, and autophagy) using a mouse model of obese/type 2 diabetes induced by a high-fat/high-fructose (HFD/HF) diet. METHODS Female C57BL/6 mice (10 wk old) were assigned to three groups ( n = 11/group): normal diet group (CON), HFD/HF group, and HFD/HF diet + endurance exercise (HFD/HF + EXE) group. Upon confirmation of hyperglycemia and overweight after 12 wk of HFD/HF diet, mice assigned to HFD/HF + EXE group started treadmill running exercise (60 min·d -1 , 5 d·wk -1 for 12 wk), with HFD/HF diet continued. RESULTS EXE ameliorated HFD/HF-induced body weight gain and hyperglycemia, improved insulin signaling and glucose transporter 4 (GLUT4) levels, and counteracted cardiac disruption. EXE reversed HFD/HF-induced myocyte premature senescence (e.g., prevention of p53, p21, p16, and lipofuscin accumulation), resulting in suppression of a senescence-associated secretory phenotype such as inflammation (tumor necrosis factor α and interleukin-1β) and oxidative stress (protein carbonylation). Moreover, EXE restored HFD/HF-induced autophagy flux deficiency, evidenced by increased LC3-II concomitant with p62 reduction and restoration of lysosome function-related proteins (LAMP2, CATHEPSIN L, TFEB, and SIRT1). More importantly, EXE retrieved HFD/HF-induced apoptosis arrest (e.g., increased cleaved CASPASE3, PARP, and TUNEL-positive cells). CONCLUSIONS Our study demonstrated that EXE-induced antisenescence phenotypes, autophagy restoration, and promotion of propitiatory cell removal by apoptosis play a crucial role in cardiac protection against metabolic distress-induced cardiac disruption.
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Affiliation(s)
- Joungbo Ko
- Department of Movement Sciences and Health, Usha Kundu, MD College of Health, University of West Florida, Pensacola, FL
| | - Young C Jang
- Department of Orthopedics, School of Medicine, Emory Musculoskeletal Institute, Emory University, Atlanta, GA
| | - John Quindry
- School of Integrative Physiology and Athletic Training, University of Montana, Missoula, MT
| | - Rodney Guttmann
- Department of Biology, University of West Florida, Pensacola, FL
| | - Ludmila Cosio-Lima
- Department of Movement Sciences and Health, Usha Kundu, MD College of Health, University of West Florida, Pensacola, FL
| | | | - Youngil Lee
- Department of Movement Sciences and Health, Usha Kundu, MD College of Health, University of West Florida, Pensacola, FL
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Mwangi SM, Li G, Balasubramaniam A, Merlin D, Dawson PA, Jang YC, Hart CM, Czaja MJ, Srinivasan S. Glial cell derived neurotrophic factor prevents western diet and palmitate-induced hepatocyte oxidative damage and death through SIRT3. Sci Rep 2022; 12:15838. [PMID: 36151131 PMCID: PMC9508117 DOI: 10.1038/s41598-022-20101-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 09/08/2022] [Indexed: 11/24/2022] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD) is associated with increased oxidative stress that leads to hepatocyte and mitochondrial damage. In this study we investigated the mechanisms involved in the induction of oxidative stress and impairment of mitochondrial quality control and mitophagy in hepatocytes by the saturated fatty acid palmitate and Western diet feeding in mice and if their harmful effects could be reversed by the neurotrophic factor glial cell derived neurotrophic factor (GDNF). Western diet (WD)-feeding increased hepatic lipid peroxidation in control mice and, in vitro palmitate induced oxidative stress and impaired the mitophagic clearance of damaged mitochondria in hepatocytes. This was accompanied by reductions in hepatocyte sirtuin 3 (SIRT3) deacetylase activity, gene expression and protein levels as well as in superoxide dismutase enzyme activity. These reductions were reversed in the liver of Western diet fed GDNF transgenic mice and in hepatocytes exposed to palmitate in the presence of GDNF. We demonstrate an important role for Western diet and palmitate in inducing oxidative stress and impairing mitophagy in hepatocytes and an ability of GDNF to prevent this. These findings suggest that GDNF or its agonists may be a potential therapy for the prevention or treatment of NAFLD.
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Affiliation(s)
- Simon Musyoka Mwangi
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, 615 Michael St, Suite 201, Atlanta, GA, 30322, USA
- Atlanta VA Health Care System, Decatur, GA, USA
| | - Ge Li
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, 615 Michael St, Suite 201, Atlanta, GA, 30322, USA
- Atlanta VA Health Care System, Decatur, GA, USA
| | - Arun Balasubramaniam
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, 615 Michael St, Suite 201, Atlanta, GA, 30322, USA
- Atlanta VA Health Care System, Decatur, GA, USA
| | - Didier Merlin
- Atlanta VA Health Care System, Decatur, GA, USA
- Institute for Biomedical Sciences, Center for Inflammation, Immunity and Infection, Digestive Disease Research Group, Georgia State University, Atlanta, GA, USA
| | - Paul A Dawson
- Department of Pediatrics, Division of Gastroenterology, Hepatology, and Nutrition, Emory University, Atlanta, GA, USA
| | - Young C Jang
- School of Biological Sciences and Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - C Michael Hart
- Atlanta VA Health Care System, Decatur, GA, USA
- Department of Medicine, Division of Pulmonary, Allergy, Critical Care and Sleep Medicine, Emory University, Atlanta, GA, USA
| | - Mark J Czaja
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, 615 Michael St, Suite 201, Atlanta, GA, 30322, USA
| | - Shanthi Srinivasan
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, 615 Michael St, Suite 201, Atlanta, GA, 30322, USA.
- Atlanta VA Health Care System, Decatur, GA, USA.
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Jeong GJ, Castels H, Kang I, Aliya B, Jang YC. Nanomaterial for Skeletal Muscle Regeneration. Tissue Eng Regen Med 2022; 19:253-261. [PMID: 35334091 PMCID: PMC8971233 DOI: 10.1007/s13770-022-00446-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/15/2022] [Accepted: 02/20/2022] [Indexed: 12/12/2022] Open
Abstract
Skeletal muscle has an innate regenerative capacity to restore their structure and function following acute damages and injuries. However, in congenital muscular dystrophies, large volumetric muscle loss, cachexia, or aging, the declined regenerative capacity of skeletal muscle results in muscle wasting and functional impairment. Recent studies indicate that muscle mass and function are closely correlated with morbidity and mortality due to the large volume and location of skeletal muscle. However, the options for treating neuromuscular disorders are limited. Biomedical engineering strategies such as nanotechnologies have been implemented to address this issue.In this review, we focus on recent studies leveraging nano-sized materials for regeneration of skeletal muscle. We look at skeletal muscle pathologies and describe various proof-of-concept and pre-clinical studies that have used nanomaterials, with a focus on how nano-sized materials can be used for skeletal muscle regeneration depending on material dimensionality.Depending on the dimensionality of nano-sized materials, their application have been changed because of their different physical and biochemical properties.Nanomaterials have been spotlighted as a great candidate for addressing the unmet needs of regenerative medicine. Nanomaterials could be applied to several types of tissues and diseases along with the unique characteristics of nanomaterials. However, when confined to muscle tissue, the targets of nanomaterial applications are limited and can be extended in future research.
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Affiliation(s)
- Gun-Jae Jeong
- Department of Orthopedics, Emory Musculoskeletal Institute, Emory School of Medicine, Atlanta, GA, 30329, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory School of Medicine, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Hannah Castels
- Department of Orthopedics, Emory Musculoskeletal Institute, Emory School of Medicine, Atlanta, GA, 30329, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Innie Kang
- Department of Orthopedics, Emory Musculoskeletal Institute, Emory School of Medicine, Atlanta, GA, 30329, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Berna Aliya
- Department of Orthopedics, Emory Musculoskeletal Institute, Emory School of Medicine, Atlanta, GA, 30329, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Young C Jang
- Department of Orthopedics, Emory Musculoskeletal Institute, Emory School of Medicine, Atlanta, GA, 30329, USA.
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Emory School of Medicine, Atlanta, GA, 30332, USA.
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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8
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Mahmood M, Kwon S, Kim H, Kim Y, Siriaraya P, Choi J, Otkhmezuri B, Kang K, Yu KJ, Jang YC, Ang CS, Yeo W. Wireless Soft Scalp Electronics and Virtual Reality System for Motor Imagery-Based Brain-Machine Interfaces. Adv Sci (Weinh) 2021; 8:e2101129. [PMID: 34272934 PMCID: PMC8498913 DOI: 10.1002/advs.202101129] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 05/01/2021] [Indexed: 05/23/2023]
Abstract
Motor imagery offers an excellent opportunity as a stimulus-free paradigm for brain-machine interfaces. Conventional electroencephalography (EEG) for motor imagery requires a hair cap with multiple wired electrodes and messy gels, causing motion artifacts. Here, a wireless scalp electronic system with virtual reality for real-time, continuous classification of motor imagery brain signals is introduced. This low-profile, portable system integrates imperceptible microneedle electrodes and soft wireless circuits. Virtual reality addresses subject variance in detectable EEG response to motor imagery by providing clear, consistent visuals and instant biofeedback. The wearable soft system offers advantageous contact surface area and reduced electrode impedance density, resulting in significantly enhanced EEG signals and classification accuracy. The combination with convolutional neural network-machine learning provides a real-time, continuous motor imagery-based brain-machine interface. With four human subjects, the scalp electronic system offers a high classification accuracy (93.22 ± 1.33% for four classes), allowing wireless, real-time control of a virtual reality game.
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Affiliation(s)
- Musa Mahmood
- George W. Woodruff School of Mechanical EngineeringCollege of EngineeringGeorgia Institute of TechnologyAtlantaGA30332USA
- Center for Human‐Centric Interfaces and EngineeringInstitute for Electronics and NanotechnologyGeorgia Institute of TechnologyAtlantaGA30332USA
| | - Shinjae Kwon
- George W. Woodruff School of Mechanical EngineeringCollege of EngineeringGeorgia Institute of TechnologyAtlantaGA30332USA
- Center for Human‐Centric Interfaces and EngineeringInstitute for Electronics and NanotechnologyGeorgia Institute of TechnologyAtlantaGA30332USA
| | - Hojoong Kim
- George W. Woodruff School of Mechanical EngineeringCollege of EngineeringGeorgia Institute of TechnologyAtlantaGA30332USA
- Center for Human‐Centric Interfaces and EngineeringInstitute for Electronics and NanotechnologyGeorgia Institute of TechnologyAtlantaGA30332USA
| | - Yun‐Soung Kim
- George W. Woodruff School of Mechanical EngineeringCollege of EngineeringGeorgia Institute of TechnologyAtlantaGA30332USA
- Center for Human‐Centric Interfaces and EngineeringInstitute for Electronics and NanotechnologyGeorgia Institute of TechnologyAtlantaGA30332USA
| | | | - Jeongmoon Choi
- School of Biological Sciences, College of SciencesGeorgia Institute of TechnologyAtlantaGA30332USA
| | | | - Kyowon Kang
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Ki Jun Yu
- School of Electrical and Electronic EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Young C. Jang
- School of Biological Sciences, College of SciencesGeorgia Institute of TechnologyAtlantaGA30332USA
| | - Chee Siang Ang
- School of ComputingUniversity of KentCanterburyKentCT2 7NTUK
| | - Woon‐Hong Yeo
- George W. Woodruff School of Mechanical EngineeringCollege of EngineeringGeorgia Institute of TechnologyAtlantaGA30332USA
- Center for Human‐Centric Interfaces and EngineeringInstitute for Electronics and NanotechnologyGeorgia Institute of TechnologyAtlantaGA30332USA
- Wallace H. Coulter Department of Biomedical EngineeringParker H. Petit Institute for Bioengineering and BiosciencesInstitute for MaterialsNeural Engineering CenterInstitute for Robotics and Intelligent MachinesGeorgia Institute of TechnologyAtlantaGA30332USA
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9
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Larouche JA, Mohiuddin M, Choi JJ, Ulintz PJ, Fraczek P, Sabin K, Pitchiaya S, Kurpiers SJ, Castor-Macias J, Liu W, Hastings RL, Brown LA, Markworth JF, De Silva K, Levi B, Merajver SD, Valdez G, Chakkalakal JV, Jang YC, Brooks SV, Aguilar CA. Murine muscle stem cell response to perturbations of the neuromuscular junction are attenuated with aging. eLife 2021; 10:e66749. [PMID: 34323217 PMCID: PMC8360658 DOI: 10.7554/elife.66749] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 07/28/2021] [Indexed: 01/29/2023] Open
Abstract
During aging and neuromuscular diseases, there is a progressive loss of skeletal muscle volume and function impacting mobility and quality of life. Muscle loss is often associated with denervation and a loss of resident muscle stem cells (satellite cells or MuSCs); however, the relationship between MuSCs and innervation has not been established. Herein, we administered severe neuromuscular trauma to a transgenic murine model that permits MuSC lineage tracing. We show that a subset of MuSCs specifically engraft in a position proximal to the neuromuscular junction (NMJ), the synapse between myofibers and motor neurons, in healthy young adult muscles. In aging and in a mouse model of neuromuscular degeneration (Cu/Zn superoxide dismutase knockout - Sod1-/-), this localized engraftment behavior was reduced. Genetic rescue of motor neurons in Sod1-/- mice reestablished integrity of the NMJ in a manner akin to young muscle and partially restored MuSC ability to engraft into positions proximal to the NMJ. Using single cell RNA-sequencing of MuSCs isolated from aged muscle, we demonstrate that a subset of MuSCs are molecularly distinguishable from MuSCs responding to myofiber injury and share similarity to synaptic myonuclei. Collectively, these data reveal unique features of MuSCs that respond to synaptic perturbations caused by aging and other stressors.
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Affiliation(s)
- Jacqueline A Larouche
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
| | - Mahir Mohiuddin
- Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of TechnologyAtlantaUnited States
- School of Biological Sciences, Georgia Institute of TechnologyAtlantaUnited States
- Wallace Coulter Departmentof Biomedical Engineering, Georgia Institute of TechnologyAtlantaUnited States
| | - Jeongmoon J Choi
- Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of TechnologyAtlantaUnited States
- School of Biological Sciences, Georgia Institute of TechnologyAtlantaUnited States
- Wallace Coulter Departmentof Biomedical Engineering, Georgia Institute of TechnologyAtlantaUnited States
| | - Peter J Ulintz
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
- Internal Medicine-Hematology/Oncology, University of MichiganAnn ArborUnited States
| | - Paula Fraczek
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
| | - Kaitlyn Sabin
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
| | | | - Sarah J Kurpiers
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
| | - Jesus Castor-Macias
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
| | - Wenxuan Liu
- Department of Pharmacology and Physiology, University of Rochester Medical CenterRochesterUnited States
- Department of Biomedical Engineering, University of Rochester Medical CenterRochesterUnited States
- Wilmot Cancer Institute, Stem Cell and Regenerative Medicine Institute, and The Rochester Aging Research Center, University of Rochester Medical CenterRochesterUnited States
| | - Robert Louis Hastings
- Departmentof Molecular Biology, Cell Biology and Biochemistry, Brown UniversityProvidenceUnited States
- Center for Translational Neuroscience, Robert J. and Nancy D. Carney Institute for Brain Science and Brown Institute for Translational Science, Brown UniversityProvidenceUnited States
| | - Lemuel A Brown
- Department of Molecular & Integrative Physiology, University of MichiganAnn ArborUnited States
| | - James F Markworth
- Department of Molecular & Integrative Physiology, University of MichiganAnn ArborUnited States
| | - Kanishka De Silva
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
| | - Benjamin Levi
- Department of Surgery, University of Texas SouthwesternDallasUnited States
- Childrens Research Institute and Center for Mineral MetabolismDallasUnited States
- Program in Cellular and Molecular Biology, University of MichiganAnn ArborUnited States
| | - Sofia D Merajver
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Internal Medicine-Hematology/Oncology, University of MichiganAnn ArborUnited States
| | - Gregorio Valdez
- Departmentof Molecular Biology, Cell Biology and Biochemistry, Brown UniversityProvidenceUnited States
- Center for Translational Neuroscience, Robert J. and Nancy D. Carney Institute for Brain Science and Brown Institute for Translational Science, Brown UniversityProvidenceUnited States
| | - Joe V Chakkalakal
- Department of Pharmacology and Physiology, University of Rochester Medical CenterRochesterUnited States
- Department of Biomedical Engineering, University of Rochester Medical CenterRochesterUnited States
- Wilmot Cancer Institute, Stem Cell and Regenerative Medicine Institute, and The Rochester Aging Research Center, University of Rochester Medical CenterRochesterUnited States
| | - Young C Jang
- Parker H. Petit Institute of Bioengineering and Bioscience, Georgia Institute of TechnologyAtlantaUnited States
- School of Biological Sciences, Georgia Institute of TechnologyAtlantaUnited States
- Wallace Coulter Departmentof Biomedical Engineering, Georgia Institute of TechnologyAtlantaUnited States
| | - Susan V Brooks
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Department of Molecular & Integrative Physiology, University of MichiganAnn ArborUnited States
| | - Carlos A Aguilar
- Department of Biomedical Engineering, University of MichiganAnn ArborUnited States
- Biointerfaces Institute, University of MichiganAnn ArborUnited States
- Childrens Research Institute and Center for Mineral MetabolismDallasUnited States
- Program in Cellular and Molecular Biology, University of MichiganAnn ArborUnited States
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10
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Hymel LA, Ogle ME, Anderson SE, San Emeterio CL, Turner TC, York WY, Liu AY, Olingy CE, Sridhar S, Lim HS, Sulchek T, Qiu P, Jang YC, Willett NJ, Botchwey EA. Modulating local S1P receptor signaling as a regenerative immunotherapy after volumetric muscle loss injury. J Biomed Mater Res A 2021; 109:695-712. [PMID: 32608188 PMCID: PMC7772280 DOI: 10.1002/jbm.a.37053] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 12/17/2022]
Abstract
Regeneration of skeletal muscle after volumetric injury is thought to be impaired by a dysregulated immune microenvironment that hinders endogenous repair mechanisms. Such defects result in fatty infiltration, tissue scarring, chronic inflammation, and debilitating functional deficits. Here, we evaluated the key cellular processes driving dysregulation in the injury niche through localized modulation of sphingosine-1-phosphate (S1P) receptor signaling. We employ dimensionality reduction and pseudotime analysis on single cell cytometry data to reveal heterogeneous immune cell subsets infiltrating preclinical muscle defects due to S1P receptor inhibition. We show that global knockout of S1P receptor 3 (S1PR3) is marked by an increase of muscle stem cells within injured tissue, a reduction in classically activated relative to alternatively activated macrophages, and increased bridging of regenerating myofibers across the defect. We found that local S1PR3 antagonism via nanofiber delivery of VPC01091 replicated key features of pseudotime immune cell recruitment dynamics and enhanced regeneration characteristic of global S1PR3 knockout. Our results indicate that local S1P receptor modulation may provide an effective immunotherapy for promoting a proreparative environment leading to improved regeneration following muscle injury.
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Affiliation(s)
- Lauren A. Hymel
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Molly E. Ogle
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Shannon E. Anderson
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | | | - Thomas C. Turner
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - William Y. York
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Alan Y. Liu
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Claire E. Olingy
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Sraeyes Sridhar
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Hong Seo Lim
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Todd Sulchek
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA 30332
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Peng Qiu
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Young C. Jang
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA 30332
| | - Nick J. Willett
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
- Department of Orthopedics, Emory University, Atlanta, GA, USA 30322
- Atlanta Veteran’s Affairs Medical Center, Decatur, GA, 30030
| | - Edward A. Botchwey
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
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11
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San Emeterio CL, Hymel LA, Turner TC, Ogle ME, Pendleton EG, York WY, Olingy CE, Liu AY, Lim HS, Sulchek TA, Warren GL, Mortensen LJ, Qiu P, Jang YC, Willett NJ, Botchwey EA. Nanofiber-Based Delivery of Bioactive Lipids Promotes Pro-regenerative Inflammation and Enhances Muscle Fiber Growth After Volumetric Muscle Loss. Front Bioeng Biotechnol 2021; 9:650289. [PMID: 33816455 PMCID: PMC8017294 DOI: 10.3389/fbioe.2021.650289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Accepted: 03/01/2021] [Indexed: 11/13/2022] Open
Abstract
Volumetric muscle loss (VML) injuries after extremity trauma results in an important clinical challenge often associated with impaired healing, significant fibrosis, and long-term pain and functional deficits. While acute muscle injuries typically display a remarkable capacity for regeneration, critically sized VML defects present a dysregulated immune microenvironment which overwhelms innate repair mechanisms leading to chronic inflammation and pro-fibrotic signaling. In this series of studies, we developed an immunomodulatory biomaterial therapy to locally modulate the sphingosine-1-phosphate (S1P) signaling axis and resolve the persistent pro-inflammatory injury niche plaguing a critically sized VML defect. Multiparameter pseudo-temporal 2D projections of single cell cytometry data revealed subtle distinctions in the altered dynamics of specific immune subpopulations infiltrating the defect that were critical to muscle regeneration. We show that S1P receptor modulation via nanofiber delivery of Fingolimod (FTY720) was characterized by increased numbers of pro-regenerative immune subsets and coincided with an enriched pool of muscle stem cells (MuSCs) within the injured tissue. This FTY720-induced priming of the local injury milieu resulted in increased myofiber diameter and alignment across the defect space followed by enhanced revascularization and reinnervation of the injured muscle. These findings indicate that localized modulation of S1P receptor signaling via nanofiber scaffolds, which resemble the native extracellular matrix ablated upon injury, provides great potential as an immunotherapy for bolstering endogenous mechanisms of regeneration following VML injury.
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Affiliation(s)
- Cheryl L. San Emeterio
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Lauren A. Hymel
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Thomas C. Turner
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Molly E. Ogle
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Emily G. Pendleton
- Regenerative Bioscience Center, Rhodes Center for ADS, University of Georgia, Athens, GA, United States
| | - William Y. York
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Claire E. Olingy
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Alan Y. Liu
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Hong Seo Lim
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
| | - Todd A. Sulchek
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
- School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States
| | - Gordon L. Warren
- Department of Physical Therapy, Georgia State University, Atlanta, GA, United States
| | - Luke J. Mortensen
- Regenerative Bioscience Center, Rhodes Center for ADS, University of Georgia, Athens, GA, United States
- School of Chemical, Materials, and Biomedical Engineering, University of Georgia, Athens, GA, United States
| | - Peng Qiu
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States
| | - Young C. Jang
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, United States
| | - Nick J. Willett
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States
- Department of Orthopedics, Emory University, Atlanta, GA, United States
- Atlanta Veterans Affairs Medical Center, Decatur, GA, United States
| | - Edward A. Botchwey
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, United States
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States
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12
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Heo JW, No MH, Cho J, Choi Y, Cho EJ, Park DH, Kim TW, Kim CJ, Seo DY, Han J, Jang YC, Jung SJ, Kang JH, Kwak HB. Moderate aerobic exercise training ameliorates impairment of mitochondrial function and dynamics in skeletal muscle of high-fat diet-induced obese mice. FASEB J 2021; 35:e21340. [PMID: 33455027 DOI: 10.1096/fj.202002394r] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2020] [Revised: 12/10/2020] [Accepted: 12/21/2020] [Indexed: 12/31/2022]
Abstract
The purpose of this study is to determine whether moderate aerobic exercise training improves high-fat diet-induced alterations in mitochondrial function and structure in the skeletal muscle. Male 4-week-old C57BL/6 mice were randomly divided into four groups: control (CON), control plus exercise (CON + EX), high-fat diet (HFD), and high-fat diet plus exercise (HFD + EX). After obesity was induced by 20 weeks of 60% HFD, treadmill exercise training was performed at 13-16 m/min, 40-50 min/day, and 6 days/week for 12 weeks. Mitochondrial structure, function, and dynamics, and mitophagy were analyzed in the skeletal muscle fibers from the red gastrocnemius. Exercise training increased mitochondrial number and area and reduced high-fat diet-induced obesity and hyperglycemia. In addition, exercise training attenuated mitochondrial dysfunction in the permeabilized myofibers, indicating that HFD-induced decrease of mitochondrial O2 respiration and Ca2+ retention capacity and increase of mitochondrial H2 O2 emission were attenuated in the HFD + EX group compared to the HFD group. Exercise also ameliorated HFD-induced imbalance of mitochondrial fusion and fission, demonstrating that HFD-induced decrease in fusion protein levels was elevated, and increase in fission protein levels was reduced in the HFD + EX groups compared with the HFD group. Moreover, dysregulation of mitophagy induced by HFD was mitigated in the HFD + EX group, indicating a decrease in PINK1 protein level. Our findings demonstrated that moderate aerobic exercise training mitigated obesity-induced insulin resistance by improving mitochondrial function, and reversed obesity-induced mitochondrial structural damage by improving mitochondrial dynamics and mitophagy, suggesting that moderate aerobic exercise training may play a therapeutic role in protecting the skeletal muscle against mitochondrial impairments and insulin resistance induced by obesity.
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Affiliation(s)
- Jun-Won Heo
- Department of Biomedical Science, Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea.,Institute of Sports & Arts Convergence, Inha University, Incheon, Republic of Korea
| | - Mi-Hyun No
- Department of Kinesiology, Inha University, Incheon, Republic of Korea
| | - Jinkyung Cho
- Institute of Sports & Arts Convergence, Inha University, Incheon, Republic of Korea
| | - Youngju Choi
- Institute of Sports & Arts Convergence, Inha University, Incheon, Republic of Korea
| | - Eun-Jeong Cho
- Department of Biomedical Science, Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea.,Institute of Sports & Arts Convergence, Inha University, Incheon, Republic of Korea
| | - Dong-Ho Park
- Department of Biomedical Science, Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea.,Institute of Sports & Arts Convergence, Inha University, Incheon, Republic of Korea.,Department of Kinesiology, Inha University, Incheon, Republic of Korea
| | - Tae-Woon Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Chang-Ju Kim
- Department of Physiology, College of Medicine, Kyung Hee University, Seoul, Republic of Korea
| | - Dae Yun Seo
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Republic of Korea
| | - Jin Han
- National Research Laboratory for Mitochondrial Signaling, Department of Physiology, College of Medicine, Cardiovascular and Metabolic Disease Center, Inje University, Busan, Republic of Korea
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, USA
| | - Su-Jeen Jung
- Department of Leisure Sports, Seoil University, Seoul, Republic of Korea
| | - Ju-Hee Kang
- Department of Biomedical Science, Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea.,Institute of Sports & Arts Convergence, Inha University, Incheon, Republic of Korea.,Department of Pharmacology, College of Medicine, Inha University, Incheon, Republic of Korea
| | - Hyo-Bum Kwak
- Department of Biomedical Science, Program in Biomedical Science & Engineering, Inha University, Incheon, Republic of Korea.,Institute of Sports & Arts Convergence, Inha University, Incheon, Republic of Korea.,Department of Kinesiology, Inha University, Incheon, Republic of Korea
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13
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Chandrasekharan B, Montllor-Albalate C, Colin AE, Andersen JL, Jang YC, Reddi AR. Cu/Zn Superoxide Dismutase (Sod1) regulates the canonical Wnt signaling pathway. Biochem Biophys Res Commun 2021; 534:720-726. [PMID: 33218686 PMCID: PMC7785591 DOI: 10.1016/j.bbrc.2020.11.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 11/04/2020] [Indexed: 01/20/2023]
Abstract
Cu/Zn Superoxide Dismutase (Sod1) catalyzes the disproportionation of cytotoxic superoxide radicals (O2•-) into oxygen (O2) and hydrogen peroxide (H2O2), a key signaling molecule. In Saccharomyces cerevisiae, we previously discovered that Sod1 participates in an H2O2-mediated redox signaling circuit that links nutrient availability to the control of energy metabolism. In response to glucose and O2, Sod1-derived H2O2 stabilizes a pair of conserved plasma membrane kinases - yeast casein kinase 1 and 2 (Yck1/2) - that signal glycolytic growth and the repression of respiration. The Yck1/2 homolog in humans, casein kinase 1-γ (CK1γ), is an integral component of the Wingless and Int-1 (Wnt) signaling pathway, which is essential for regulating cell fate and proliferation in early development and adult tissue and is dysregulated in many cancers. Herein, we establish the conservation of the SOD1/YCK1 redox signaling axis in humans by finding that SOD1 regulates CK1γ expression in human embryonic kidney 293 (HEK293) cells and is required for canonical Wnt signaling and Wnt-dependent cell proliferation.
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Affiliation(s)
- Bindu Chandrasekharan
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | | | - Alyson E Colin
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Joshua L Andersen
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT, 84602, USA
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA; Parker Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Amit R Reddi
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA; School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA; Parker Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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14
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Jang YC, Rodriguez K, Lustgarten MS, Muller FL, Bhattacharya A, Pierce A, Choi JJ, Lee NH, Chaudhuri A, Richardson AG, Van Remmen H. Superoxide-mediated oxidative stress accelerates skeletal muscle atrophy by synchronous activation of proteolytic systems. GeroScience 2020; 42:1579-1591. [PMID: 32451848 PMCID: PMC7732940 DOI: 10.1007/s11357-020-00200-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Accepted: 05/06/2020] [Indexed: 12/25/2022] Open
Abstract
The maintenance of skeletal muscle mass depends on the overall balance between the rates of protein synthesis and degradation. Thus, age-related muscle atrophy and function, commonly known as sarcopenia, may result from decreased protein synthesis, increased proteolysis, or simultaneous changes in both processes governed by complex multifactorial mechanisms. Growing evidence implicates oxidative stress and reactive oxygen species (ROS) as an essential regulator of proteolysis. Our previous studies have shown that genetic deletion of CuZn superoxide dismutase (CuZnSOD, Sod1) in mice leads to elevated oxidative stress, muscle atrophy and weakness, and an acceleration in age-related phenotypes associated with sarcopenia. The goal of this study is to determine whether oxidative stress directly influences the acceleration of proteolysis in skeletal muscle of Sod1-/- mice as a function of age. Compared to control, Sod1-/- muscle showed a significant elevation in protein carbonyls and 3-nitrotyrosine levels, suggesting high oxidative and nitrosative protein modifications were present. In addition, age-dependent muscle atrophy in Sod1-/- muscle was accompanied by an upregulation of the cysteine proteases, calpain, and caspase-3, which are known to play a key role in the initial breakdown of sarcomeres during atrophic conditions. Furthermore, an increase in oxidative stress-induced muscle atrophy was also strongly coupled with simultaneous activation of two major proteolytic systems, the ubiquitin-proteasome and lysosomal autophagy pathways. Collectively, our data suggest that chronic oxidative stress in Sod1-/- mice accelerates age-dependent muscle atrophy by enhancing coordinated activation of the proteolytic systems, thereby resulting in overall protein degradation.
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Affiliation(s)
- Young C Jang
- School of Biological Sciences and Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, Atlanta, GA, USA.
| | - Karl Rodriguez
- Sam & Ann Barshop Institute for Longevity and Aging Studies, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA
| | - Michael S Lustgarten
- Jean Mayer Human Nutrition Research Center on Aging, Tufts University, Boston, MA, USA
| | - Florian L Muller
- MD Anderson Cancer Center, University of Texas, Houston, TX, USA
| | - Arunabh Bhattacharya
- School of Osteopathic Medicine, University of the Incarnate Word, San Antonio, TX, USA
| | | | - Jeongmoon J Choi
- School of Biological Sciences and Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Nan Hee Lee
- School of Biological Sciences and Parker H. Petit Institute for Bioengineering & Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | | | - Arlan G Richardson
- Reynolds Oklahoma Center on Aging, Oklahoma Health Science Center, Oklahoma City, OK, USA
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15
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Lee Y, Choi JJ, Ahn SI, Lee NH, Han WM, Mohiuddin M, Shin EJ, Wood L, Park KD, Kim Y, Jang YC. Engineered Heterochronic Parabiosis in 3D Microphysiological System for Identification of Muscle Rejuvenating Factors. Adv Funct Mater 2020; 30:2002924. [PMID: 38053980 PMCID: PMC10697693 DOI: 10.1002/adfm.202002924] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Indexed: 12/07/2023]
Abstract
Exposure of aged mice to a young systemic milieu revealed remarkable rejuvenation effects on aged tissues, including skeletal muscle. Although some candidate factors have been identified, the exact identity and the underlying mechanisms of putative rejuvenating factors remain elusive, mainly due to the complexity of in vivo parabiosis. Here, we present an in vitro muscle parabiosis system that integrates young- and old-muscle stem cell vascular niche on a three-dimensional microfluidic platform designed to recapitulate key features of native muscle stem cell microenvironment. This innovative system enables mechanistic studies of cellular dynamics and molecular interactions within the muscle stem cell niche, especially in response to conditional extrinsic stimuli of local and systemic factors. We demonstrate that vascular endothelial growth factor (VEGF) signaling from endothelial cells and myotubes synergistically contribute to the rejuvenation of the aged muscle stem cell function. Moreover, with the adjustable on-chip system, we can mimic both blood transfusion and parabiosis and detect the time-varying effects of anti-geronic and pro-geronic factors in a single organ or multi-organ systems. Our unique approach presents a complementary in vitro model to supplement in vivo parabiosis for identifying potential anti-geronic factors responsible for revitalizing aging organs.
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Affiliation(s)
- Yunki Lee
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Jeongmoon J. Choi
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Song Ih Ahn
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Nan Hee Lee
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Woojin M. Han
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Mahir Mohiuddin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Eun Jung Shin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Levi Wood
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Ki Dong Park
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea
| | - YongTae Kim
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Young C. Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
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16
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Kwon YT, Norton JJS, Cutrone A, Lim HR, Kwon S, Choi JJ, Kim HS, Jang YC, Wolpaw JR, Yeo WH. Breathable, large-area epidermal electronic systems for recording electromyographic activity during operant conditioning of H-reflex. Biosens Bioelectron 2020; 165:112404. [PMID: 32729524 PMCID: PMC7484316 DOI: 10.1016/j.bios.2020.112404] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/28/2020] [Accepted: 06/20/2020] [Indexed: 10/24/2022]
Abstract
Operant conditioning of Hoffmann's reflex (H-reflex) is a non-invasive and targeted therapeutic intervention for patients with movement disorders following spinal cord injury. The reflex-conditioning protocol uses electromyography (EMG) to measure reflexes from specific muscles elicited using transcutaneous electrical stimulation. Despite recent advances in wearable electronics, existing EMG systems that measure muscle activity for operant conditioning of spinal reflexes still use rigid metal electrodes with conductive gels and aggressive adhesives, while requiring precise positioning to ensure reliability of data across experimental sessions. Here, we present the first large-area epidermal electronic system (L-EES) and demonstrate its use in every step of the reflex-conditioning protocol. The L-EES is a stretchable and breathable composite of nanomembrane electrodes (16 electrodes in a four by four array), elastomer, and fabric. The nanomembrane electrode array enables EMG recording from a large surface area on the skin and the breathable elastomer with fabric is biocompatible and comfortable for patients. We show that L-EES can record direct muscle responses (M-waves) and H-reflexes, both of which are comparable to those recorded using conventional EMG recording systems. In addition, L-EES may improve the reflex-conditioning protocol; it has potential to automatically optimize EMG electrode positioning, which may reduce setup time and error across experimental sessions.
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Affiliation(s)
- Young-Tae Kwon
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - James J S Norton
- National Center for Adaptive Neurotechnologies, Wadsworth Center, New York State Department of Health, Albany, NY, 12208, USA; Stratton VA Medical Center, Albany, NY, 12208, USA
| | - Andrew Cutrone
- National Center for Adaptive Neurotechnologies, Wadsworth Center, New York State Department of Health, Albany, NY, 12208, USA
| | - Hyo-Ryoung Lim
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shinjae Kwon
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Jeongmoon J Choi
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Hee Seok Kim
- Department of Mechanical Engineering, University of South Alabama, Mobile, AL, 36608, USA
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA; Wallace H. Coulter Department of Biomedical Engineering and Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Jonathan R Wolpaw
- National Center for Adaptive Neurotechnologies, Wadsworth Center, New York State Department of Health, Albany, NY, 12208, USA; Stratton VA Medical Center, Albany, NY, 12208, USA
| | - Woon-Hong Yeo
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA; Wallace H. Coulter Department of Biomedical Engineering and Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA; Flexible and Wearable Electronics Advanced Research Program, Neural Engineering Center, Institute for Materials, and Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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17
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Kwon YT, Kim YS, Kwon S, Mahmood M, Lim HR, Park SW, Kang SO, Choi JJ, Herbert R, Jang YC, Choa YH, Yeo WH. All-printed nanomembrane wireless bioelectronics using a biocompatible solderable graphene for multimodal human-machine interfaces. Nat Commun 2020; 11:3450. [PMID: 32651424 PMCID: PMC7351733 DOI: 10.1038/s41467-020-17288-0] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/19/2020] [Indexed: 12/22/2022] Open
Abstract
Recent advances in nanomaterials and nano-microfabrication have enabled the development of flexible wearable electronics. However, existing manufacturing methods still rely on a multi-step, error-prone complex process that requires a costly cleanroom facility. Here, we report a new class of additive nanomanufacturing of functional materials that enables a wireless, multilayered, seamlessly interconnected, and flexible hybrid electronic system. All-printed electronics, incorporating machine learning, offers multi-class and versatile human-machine interfaces. One of the key technological advancements is the use of a functionalized conductive graphene with enhanced biocompatibility, anti-oxidation, and solderability, which allows a wireless flexible circuit. The high-aspect ratio graphene offers gel-free, high-fidelity recording of muscle activities. The performance of the printed electronics is demonstrated by using real-time control of external systems via electromyograms. Anatomical study with deep learning-embedded electrophysiology mapping allows for an optimal selection of three channels to capture all finger motions with an accuracy of about 99% for seven classes. Though wearable electronics remain an attractive technology for bioelectronics, fabrication methods that precisely print biocompatible materials for electronics are needed. Here, the authors report an additive manufacturing process that yields all-printed nanomaterial-based wireless electronics.
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Affiliation(s)
- Young-Tae Kwon
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Yun-Soung Kim
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shinjae Kwon
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Musa Mahmood
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Hyo-Ryoung Lim
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Si-Woo Park
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Sung-Oong Kang
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Jeongmoon J Choi
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Robert Herbert
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA.,Wallace H. Coulter Department of Biomedical Engineering, Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Yong-Ho Choa
- Department of Materials Science and Chemical Engineering, Hanyang University, Ansan, 15588, South Korea
| | - Woon-Hong Yeo
- George W. Woodruff School of Mechanical Engineering, Institute for Electronics and Nanotechnology, Georgia Institute of Technology, Atlanta, GA, 30332, USA. .,Wallace H. Coulter Department of Biomedical Engineering, Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA. .,Neural Engineering Center, Flexible and Wearable Electronics Advanced Research, Institute for Materials, Institute for Robotics and Intelligent Machines, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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18
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Choi J, Lee Y, Lee N, Han WM, Mohiuddin M, Shin E, Anderson S, Park KD, Jang YC. Microfluidic 3D Model of Heterochronic Parabiosis to Study Systemic Regulation of Skeletal Muscle Aging. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.07249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Mohiuddin M, Lee NH, Choi JJ, Anderson SE, Han WM, Aliya B, Jang YC. The Muscle Stem Cell Mediates Remodeling of Skeletal Muscle Mitochondrial Networks. FASEB J 2020. [DOI: 10.1096/fasebj.2020.34.s1.04321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Han WM, Jang YC, García AJ. The Extracellular Matrix and Cell–Biomaterial Interactions. Biomater Sci 2020. [DOI: 10.1016/b978-0-12-816137-1.00045-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Han WM, Mohiuddin M, Anderson SE, García AJ, Jang YC. Co-delivery of Wnt7a and muscle stem cells using synthetic bioadhesive hydrogel enhances murine muscle regeneration and cell migration during engraftment. Acta Biomater 2019; 94:243-252. [PMID: 31228633 DOI: 10.1016/j.actbio.2019.06.025] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 06/09/2019] [Accepted: 06/17/2019] [Indexed: 01/02/2023]
Abstract
Skeletal muscle possesses efficient ability to regenerate upon minor injuries, but its capacity to regenerate is severely compromised with traumatic injuries and muscle-associated diseases. Recent evidence suggests that skeletal muscle regeneration can be enhanced by transplantation of muscle satellite cells (MuSCs) or treatment with pro-myogenic factors, such as Wingless-type MMTV Integrated 7a (Wnt7a) protein. Although direct intramuscular injection is the simplest method to deliver MuSCs and Wnt7a for regenerative therapy, direct injections are not viable in many clinical cases where structural integrity is severely compromised. To address this challenge, we evaluated the feasibility of co-delivering pro-myogenic factors, such as Wnt7a, and MuSCs using a synthetic poly(ethylene glycol) (PEG)-based hydrogel to the affected skeletal muscles. The Wnt7a release rate can be controlled by modulating the polymer density of the hydrogel, and this release rate can be further accelerated through the proteolytic degradation of the hydrogel. Treating cryo-injured tibialis anterior (TA) muscles with Wnt7a-loaded hydrogels resulted in an improved regenerative response by day 14, measured by increased muscle fiber cross-sectional area, bulk TA mass, and the number of Pax7+ MuSCs at the injury site, compared to the TA muscles treated with Wnt7a-free hydrogels. Co-delivery of Wnt7a and primary MuSCs using the synthetic hydrogel to the cryo-injured TA muscles significantly increased cellular migration during the engraftment process. This work provides a synthetic biomaterial platform for advancing treatment strategies of skeletal muscle conditions where direct intramuscular injection may be challenging. Finally, the current outcomes establish an important foundation for future applications in treating severe muscle trauma and diseases, where the endogenous repair capacity is critically impaired. STATEMENT OF SIGNIFICANCE: Skeletal muscle injuries and diseases cause debilitating health consequences, including disability and diminished quality of life. Treatment using protein and stem cell-based therapeutics may help regenerate the affected muscles, but direct intramuscular injection may not be feasible in severe muscle injuries due to the gravely damaged tissue structure. In chronic muscle diseases, such as Duchenne muscular dystrophy, local treatment of the diaphragm, a muscle critical for respiration, may be necessary but direct injection is difficult due to its thin dimensions. To address this challenge, this work presents a synthetic and bioactive muscle "patch" that enables concurrent administration of proteins and muscle stem cells for accelerated muscle healing.
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22
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Mohiuddin M, Lee NH, Moon JY, Han WM, Anderson SE, Choi JJ, Shin E, Nakhai SA, Tran T, Aliya B, Kim DY, Gerold A, Hansen LM, Taylor WR, Jang YC. Critical Limb Ischemia Induces Remodeling of Skeletal Muscle Motor Unit, Myonuclear-, and Mitochondrial-Domains. Sci Rep 2019; 9:9551. [PMID: 31266969 PMCID: PMC6606576 DOI: 10.1038/s41598-019-45923-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Accepted: 06/20/2019] [Indexed: 11/09/2022] Open
Abstract
Critical limb ischemia, the most severe form of peripheral artery disease, leads to extensive damage and alterations to skeletal muscle homeostasis. Although recent research has investigated the tissue-specific responses to ischemia, the role of the muscle stem cell in the regeneration of its niche components within skeletal muscle has been limited. To elucidate the regenerative mechanism of the muscle stem cell in response to ischemic insults, we explored cellular interactions between the vasculature, neural network, and muscle fiber within the muscle stem cell niche. Using a surgical murine hindlimb ischemia model, we first discovered a significant increase in subsynaptic nuclei and remodeling of the neuromuscular junction following ischemia-induced denervation. In addition, ischemic injury causes significant alterations to the myofiber through a muscle stem cell-mediated accumulation of total myonuclei and a concomitant decrease in myonuclear domain size, possibly to enhance the transcriptional and translation output and restore muscle mass. Results also revealed an accumulation of total mitochondrial content per myonucleus in ischemic myofibers to compensate for impaired mitochondrial function and high turnover rate. Taken together, the findings from this study suggest that the muscle stem cell plays a role in motor neuron reinnervation, myonuclear accretion, and mitochondrial biogenesis for skeletal muscle regeneration following ischemic injury.
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Affiliation(s)
- Mahir Mohiuddin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Nan Hee Lee
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - June Young Moon
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Woojin M Han
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shannon E Anderson
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Jeongmoon J Choi
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Eunjung Shin
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Shadi A Nakhai
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Thu Tran
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Berna Aliya
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Do Young Kim
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Aimee Gerold
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Laura M Hansen
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - W Robert Taylor
- Division of Cardiology, Emory University School of Medicine, Atlanta, GA, 30322, USA
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, 30332, USA.
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, 30332, USA.
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23
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Mohiuddin M, Lee NH, Moon A, Han WM, Anderson SE, Choi J, Shin E, Aliya B, Hansen L, Taylor WR, Jang YC. Muscle Stem Cell‐Nerve‐Vasculature Interactions Modulate Tissue Regeneration Following Critical Limb Ischemia. FASEB J 2019. [DOI: 10.1096/fasebj.2019.33.1_supplement.524.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mahir Mohiuddin
- Wallace H. Coulter Department of Biomedical EngineeringGeorgia Institute of Technology and Emory UniversityAtlantaGA
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
| | - Nan Hee Lee
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
- School of Biological SciencesGeorgia Institute of TechnologyAtlantaGA
| | - Austin Moon
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
- School of Biological SciencesGeorgia Institute of TechnologyAtlantaGA
| | - Woojin M Han
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
- George W. Woodruff School of Mechanical EngineeringGeorgia Institute of TechnologyAtlantaGA
| | - Shannon E Anderson
- Wallace H. Coulter Department of Biomedical EngineeringGeorgia Institute of Technology and Emory UniversityAtlantaGA
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
| | - Jeongmoon Choi
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
- School of Biological SciencesGeorgia Institute of TechnologyAtlantaGA
| | - Eunjung Shin
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
- School of Biological SciencesGeorgia Institute of TechnologyAtlantaGA
| | - Berna Aliya
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
- School of Biological SciencesGeorgia Institute of TechnologyAtlantaGA
| | | | | | - Young C. Jang
- Wallace H. Coulter Department of Biomedical EngineeringGeorgia Institute of Technology and Emory UniversityAtlantaGA
- Parker H. Petit Institute of Bioengineering and BioscienceGeorgia Institute of TechnologyAtlantaGA
- School of Biological SciencesGeorgia Institute of TechnologyAtlantaGA
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24
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Anderson SE, Han WM, Srinivasa V, Mohiuddin M, Ruehle MA, Moon JY, Shin E, San Emeterio CL, Ogle ME, Botchwey EA, Willett NJ, Jang YC. Determination of a Critical Size Threshold for Volumetric Muscle Loss in the Mouse Quadriceps. Tissue Eng Part C Methods 2019; 25:59-70. [PMID: 30648479 PMCID: PMC6389771 DOI: 10.1089/ten.tec.2018.0324] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 01/02/2019] [Indexed: 12/15/2022] Open
Abstract
IMPACT STATEMENT The goal of this study was to determine the threshold for a critically sized, nonhealing muscle defect by characterizing key components in the balance between fibrosis and regeneration as a function of injury size in the mouse quadriceps. There is currently limited understanding of what leads to a critically sized muscle defect and which muscle regenerative components are functionally impaired. With the substantial increase in preclinical VML models as testbeds for tissue engineering therapeutics, defining the critical threshold for VML injuries will be instrumental in characterizing therapeutic efficacy and potential for subsequent translation.
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Affiliation(s)
- Shannon E. Anderson
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
| | - Woojin M. Han
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia
| | - Vunya Srinivasa
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia
| | - Mahir Mohiuddin
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
| | - Marissa A. Ruehle
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
| | - June Young Moon
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia
| | - Eunjung Shin
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia
| | - Cheryl L. San Emeterio
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
| | - Molly E. Ogle
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
| | - Edward A. Botchwey
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
| | - Nick J. Willett
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- Department of Orthopedics, Emory University, Atlanta, Georgia
- Atlanta Veteran's Affairs Medical Center, Decatur, Georgia
| | - Young C. Jang
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory Unversity, Atlanta, Georgia
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, Georgia
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia
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25
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Rao TN, Gupta MK, Softic S, Wang LD, Jang YC, Thomou T, Bezy O, Kulkarni RN, Kahn CR, Wagers AJ. Attenuation of PKCδ enhances metabolic activity and promotes expansion of blood progenitors. EMBO J 2018; 37:embj.2018100409. [PMID: 30446598 PMCID: PMC6293338 DOI: 10.15252/embj.2018100409] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 09/08/2018] [Accepted: 09/12/2018] [Indexed: 12/21/2022] Open
Abstract
A finely tuned balance of self‐renewal, differentiation, proliferation, and survival governs the pool size and regenerative capacity of blood‐forming hematopoietic stem and progenitor cells (HSPCs). Here, we report that protein kinase C delta (PKCδ) is a critical regulator of adult HSPC number and function that couples the proliferative and metabolic activities of HSPCs. PKCδ‐deficient mice showed a pronounced increase in HSPC numbers, increased competence in reconstituting lethally irradiated recipients, enhanced long‐term competitive advantage in serial transplantation studies, and an augmented HSPC recovery during stress. PKCδ‐deficient HSPCs also showed accelerated proliferation and reduced apoptosis, but did not exhaust in serial transplant assays or induce leukemia. Using inducible knockout and transplantation models, we further found that PKCδ acts in a hematopoietic cell‐intrinsic manner to restrict HSPC number and bone marrow regenerative function. Mechanistically, PKCδ regulates HSPC energy metabolism and coordinately governs multiple regulators within signaling pathways implicated in HSPC homeostasis. Together, these data identify PKCδ as a critical regulator of HSPC signaling and metabolism that acts to limit HSPC expansion in response to physiological and regenerative demands.
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Affiliation(s)
- Tata Nageswara Rao
- Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA .,Section on Islet Cell and Regenerative Biology, Joslin Diabetes Center, Boston, MA, USA
| | - Manoj K Gupta
- Section on Islet Cell and Regenerative Biology, Joslin Diabetes Center, Boston, MA, USA
| | - Samir Softic
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Boston, MA, USA.,Division of Gastroenterology, Hepatology and Nutrition, Boston Children's Hospital, Boston, MA, USA
| | - Leo D Wang
- Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA.,Section on Islet Cell and Regenerative Biology, Joslin Diabetes Center, Boston, MA, USA.,Division of Pediatric Hematology/Oncology/Stem Cell Transplantation, Dana-Farber/Boston Children's Center for Cancer and Blood Disorders, Boston, MA, USA
| | - Young C Jang
- Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA.,Section on Islet Cell and Regenerative Biology, Joslin Diabetes Center, Boston, MA, USA
| | - Thomas Thomou
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Boston, MA, USA
| | - Olivier Bezy
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Boston, MA, USA
| | - Rohit N Kulkarni
- Section on Islet Cell and Regenerative Biology, Joslin Diabetes Center, Boston, MA, USA
| | - C Ronald Kahn
- Section on Integrative Physiology and Metabolism, Joslin Diabetes Center, Boston, MA, USA
| | - Amy J Wagers
- Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA .,Section on Islet Cell and Regenerative Biology, Joslin Diabetes Center, Boston, MA, USA
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26
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Kwong JQ, Huo J, Bround MJ, Boyer JG, Schwanekamp JA, Ghazal N, Maxwell JT, Jang YC, Khuchua Z, Shi K, Bers DM, Davis J, Molkentin JD. The mitochondrial calcium uniporter underlies metabolic fuel preference in skeletal muscle. JCI Insight 2018; 3:121689. [PMID: 30429366 DOI: 10.1172/jci.insight.121689] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 10/04/2018] [Indexed: 01/17/2023] Open
Abstract
The mitochondrial Ca2+ uniporter (MCU) complex mediates acute mitochondrial Ca2+ influx. In skeletal muscle, MCU links Ca2+ signaling to energy production by directly enhancing the activity of key metabolic enzymes in the mitochondria. Here, we examined the role of MCU in skeletal muscle development and metabolic function by generating mouse models for the targeted deletion of Mcu in embryonic, postnatal, and adult skeletal muscle. Loss of Mcu did not affect muscle growth and maturation or otherwise cause pathology. Skeletal muscle-specific deletion of Mcu in mice also did not affect myofiber intracellular Ca2+ handling, but it did inhibit acute mitochondrial Ca2+ influx and mitochondrial respiration stimulated by Ca2+, resulting in reduced acute exercise performance in mice. However, loss of Mcu also resulted in enhanced muscle performance under conditions of fatigue, with a preferential shift toward fatty acid metabolism, resulting in reduced body fat with aging. Together, these results demonstrate that MCU-mediated mitochondrial Ca2+ regulation underlies skeletal muscle fuel selection at baseline and under enhanced physiological demands, which affects total homeostatic metabolism.
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Affiliation(s)
- Jennifer Q Kwong
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA.,Department of Pediatrics, Division of Cardiovascular Biology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Jiuzhou Huo
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Michael J Bround
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Justin G Boyer
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Jennifer A Schwanekamp
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA
| | - Nasab Ghazal
- Department of Pediatrics, Division of Cardiovascular Biology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Joshua T Maxwell
- Department of Pediatrics, Division of Cardiovascular Biology, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, Georgia, USA
| | - Zaza Khuchua
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA.,Sechenov University, Moscow, Russia
| | - Kevin Shi
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
| | - Donald M Bers
- Department of Pharmacology, University of California, Davis, California, USA
| | - Jennifer Davis
- Department of Bioengineering, University of Washington, Seattle, Washington, USA
| | - Jeffery D Molkentin
- Department of Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati, Cincinnati, Ohio, USA.,Howard Hughes Medical Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA
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27
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Sago CD, Lokugamage MP, Paunovska K, Vanover DA, Monaco CM, Shah NN, Gamboa Castro M, Anderson SE, Rudoltz TG, Lando GN, Munnilal Tiwari P, Kirschman JL, Willett N, Jang YC, Santangelo PJ, Bryksin AV, Dahlman JE. High-throughput in vivo screen of functional mRNA delivery identifies nanoparticles for endothelial cell gene editing. Proc Natl Acad Sci U S A 2018; 115:E9944-E9952. [PMID: 30275336 PMCID: PMC6196543 DOI: 10.1073/pnas.1811276115] [Citation(s) in RCA: 157] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Dysfunctional endothelium causes more disease than any other cell type. Systemically administered RNA delivery to nonliver tissues remains challenging, in large part because there is no high-throughput method to identify nanoparticles that deliver functional mRNA to cells in vivo. Here we report a system capable of simultaneously quantifying how >100 lipid nanoparticles (LNPs) deliver mRNA that is translated into functional protein. Using this system (named FIND), we measured how >250 LNPs delivered mRNA to multiple cell types in vivo and identified 7C2 and 7C3, two LNPs that efficiently deliver siRNA, single-guide RNA (sgRNA), and mRNA to endothelial cells. The 7C3 delivered Cas9 mRNA and sgRNA to splenic endothelial cells as efficiently as hepatocytes, distinguishing it from LNPs that deliver Cas9 mRNA and sgRNA to hepatocytes more than other cell types. These data demonstrate that FIND can identify nanoparticles with novel tropisms in vivo.
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Affiliation(s)
- Cory D Sago
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Melissa P Lokugamage
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Kalina Paunovska
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Daryll A Vanover
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Christopher M Monaco
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332
| | - Nirav N Shah
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332
| | - Marielena Gamboa Castro
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Shannon E Anderson
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Tobi G Rudoltz
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Gwyneth N Lando
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Pooja Munnilal Tiwari
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Jonathan L Kirschman
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Nick Willett
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332
- Department of Orthopaedics, Emory University, Atlanta, GA 30322
- Atlanta Veterans Affairs Medical Center, Decatur, GA 30033
| | - Young C Jang
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332
| | - Philip J Santangelo
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332
| | - Anton V Bryksin
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332
| | - James E Dahlman
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, GA 30332;
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28
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Han WM, Anderson SE, Mohiuddin M, Barros D, Nakhai SA, Shin E, Amaral IF, Pêgo AP, García AJ, Jang YC. Synthetic matrix enhances transplanted satellite cell engraftment in dystrophic and aged skeletal muscle with comorbid trauma. Sci Adv 2018; 4:eaar4008. [PMID: 30116776 PMCID: PMC6093653 DOI: 10.1126/sciadv.aar4008] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Accepted: 07/11/2018] [Indexed: 05/29/2023]
Abstract
Muscle satellite cells (MuSCs) play a central role in muscle regeneration, but their quantity and function decline with comorbidity of trauma, aging, and muscle diseases. Although transplantation of MuSCs in traumatically injured muscle in the comorbid context of aging or pathology is a strategy to boost muscle regeneration, an effective cell delivery strategy in these contexts has not been developed. We engineered a synthetic hydrogel-based matrix with optimal mechanical, cell-adhesive, and protease-degradable properties that promotes MuSC survival, proliferation, and differentiation. Furthermore, we establish a biomaterial-mediated cell delivery strategy for treating muscle trauma, where intramuscular injections may not be applicable. Delivery of MuSCs in the engineered matrix significantly improved in vivo cell survival, proliferation, and engraftment in nonirradiated and immunocompetent muscles of aged and dystrophic mice compared to collagen gels and cell-only controls. This platform may be suitable for treating craniofacial and limb muscle trauma, as well as postoperative wounds of elderly and dystrophic patients.
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Affiliation(s)
- Woojin M. Han
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Shannon E. Anderson
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Mahir Mohiuddin
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Daniela Barros
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Shadi A. Nakhai
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Eunjung Shin
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Isabel Freitas Amaral
- Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Ana Paula Pêgo
- Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia, Universidade do Porto, Porto, Portugal
| | - Andrés J. García
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Young C. Jang
- Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA 30332, USA
- Coulter Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
- School of Biological Sciences, Georgia Institute of Technology, Atlanta, GA 30332, USA
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29
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Kwon I, Jang Y, Cho JY, Jang YC, Lee Y. Long-term resistance exercise-induced muscular hypertrophy is associated with autophagy modulation in rats. J Physiol Sci 2018; 68:269-280. [PMID: 28213823 PMCID: PMC10718009 DOI: 10.1007/s12576-017-0531-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Accepted: 02/08/2017] [Indexed: 01/06/2023]
Abstract
Elevation of anabolism and concurrent suppression of catabolism are critical metabolic adaptations for muscular hypertrophy in response to resistance exercise (RE). Here, we investigated if RE-induced muscular hypertrophy is acquired by modulating a critical catabolic process autophagy. Male Wistar Hannover rats (14 weeks old) were randomly assigned to either sedentary control (SC, n = 10) or resistance exercise (RE, n = 10). RE elicited significant hypertrophy of flexor digitorum profundus (FDP) muscles in parallel with enhancement in anabolic signaling pathways (phosphorylation of AKT, mTOR, and p70S6K). Importantly, RE-treated FDP muscle exhibited a significant decline in autophagy evidenced by diminished phosphorylation levels of AMPK, a decrease in LC3-II/LC3-I ratio, an increase in p62 level, and a decline in active form of lysosomal protease CATHEPSIN L in the absence of alterations of key autophagy proteins: ULK1 phosphorylation, BECLIN1, and BNIP3. Our study suggests that RE-induced hypertrophy is achieved by potentiating anabolism and restricting autophagy-induced catabolism.
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Affiliation(s)
- Insu Kwon
- Molecular and Cellular Exercise Physiology Laboratory, Department of Exercise Science and Community Health, College of Health, University of West Florida, Pensacola, FL, USA
| | - Yongchul Jang
- Molecular and Cellular Exercise Physiology Laboratory, Department of Exercise Science and Community Health, College of Health, University of West Florida, Pensacola, FL, USA
| | - Joon-Yong Cho
- Exercise Biochemistry Laboratory, Korea National Sport University, Seoul, Korea
| | - Young C Jang
- School of Applied Physiology and Parker H. Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Youngil Lee
- Molecular and Cellular Exercise Physiology Laboratory, Department of Exercise Science and Community Health, College of Health, University of West Florida, Pensacola, FL, USA.
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30
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Han WM, Jang YC, García AJ. Engineered matrices for skeletal muscle satellite cell engraftment and function. Matrix Biol 2016; 60-61:96-109. [PMID: 27269735 DOI: 10.1016/j.matbio.2016.06.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Revised: 05/22/2016] [Accepted: 06/02/2016] [Indexed: 12/12/2022]
Abstract
Regeneration of traumatically injured skeletal muscles is severely limited. Moreover, the regenerative capacity of skeletal muscle declines with aging, further exacerbating the problem. Recent evidence supports that delivery of muscle satellite cells to the injured muscles enhances muscle regeneration and reverses features of aging, including reduction in muscle mass and regenerative capacity. However, direct delivery of satellite cells presents a challenge at a translational level due to inflammation and donor cell death, motivating the need to develop engineered matrices for muscle satellite cell delivery. This review will highlight important aspects of satellite cell and their niche biology in the context of muscle regeneration, and examine recent progresses in the development of engineered cell delivery matrices designed for skeletal muscle regeneration. Understanding the interactions of muscle satellite cells and their niche in both native and engineered systems is crucial to developing muscle pathology-specific cell- and biomaterial-based therapies.
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Affiliation(s)
- Woojin M Han
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, United States; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States
| | - Young C Jang
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States; School of Applied Physiology, Georgia Institute of Technology, Atlanta, GA, United States
| | - Andrés J García
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, United States; Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, United States.
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31
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Rao TN, Marks-Bluth J, Sullivan J, Gupta MK, Chandrakanthan V, Fitch SR, Ottersbach K, Jang YC, Piao X, Kulkarni RN, Serwold T, Pimanda JE, Wagers AJ. High-level Gpr56 expression is dispensable for the maintenance and function of hematopoietic stem and progenitor cells in mice. Stem Cell Res 2015; 14:307-22. [PMID: 25840412 PMCID: PMC4439311 DOI: 10.1016/j.scr.2015.02.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Revised: 02/04/2015] [Accepted: 02/06/2015] [Indexed: 12/20/2022] Open
Abstract
Blood formation by hematopoietic stem cells (HSCs) is regulated by a still incompletely defined network of general and HSC-specific regulators. In this study, we analyzed the role of G-protein coupled receptor 56 (Gpr56) as a candidate HSC regulator based on its differential expression in quiescent relative to proliferating HSCs and its common targeting by core HSC regulators. Detailed expression analysis revealed that Gpr56 is abundantly expressed by HSPCs during definitive hematopoiesis in the embryo and in the adult bone marrow, but its levels are reduced substantially as HSPCs differentiate. However, despite enriched expression in HSPCs, Gpr56-deficiency did not impair HSPC maintenance or function during steady-state or myeloablative stress-induced hematopoiesis. Gpr56-deficient HSCs also responded normally to physiological and pharmacological mobilization signals, despite the reported role of this GPCR as a regulator of cell adhesion and migration in neuronal cells. Moreover, Gpr56-deficient bone marrow engrafted with equivalent efficiency as wild-type HSCs in primary recipients; however, their reconstituting ability was reduced when subjected to serial transplantation. These data indicate that although GPR56 is abundantly and selectively expressed by primitive HSPCs, its high level expression is largely dispensable for steady-state and regenerative hematopoiesis.
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Affiliation(s)
- Tata Nageswara Rao
- Howard Hughes Medical Institute, USA; Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA; Joslin Diabetes Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02215, USA
| | - Jonathan Marks-Bluth
- Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW 2052, Australia; Prince of Wales Clinical School, University of New South Wales, Sydney, NSW 2052, Australia
| | - Jessica Sullivan
- Howard Hughes Medical Institute, USA; Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA; Joslin Diabetes Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02215, USA
| | - Manoj K Gupta
- Joslin Diabetes Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02215, USA
| | - Vashe Chandrakanthan
- Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW 2052, Australia; Prince of Wales Clinical School, University of New South Wales, Sydney, NSW 2052, Australia
| | - Simon R Fitch
- Department of Haematology, Cambridge Institute for Medical Research University of Cambridge, Cambridge CB2 0XY, UK; Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0XY, UK
| | - Katrin Ottersbach
- Department of Haematology, Cambridge Institute for Medical Research University of Cambridge, Cambridge CB2 0XY, UK; Wellcome Trust - Medical Research Council Stem Cell Institute, University of Cambridge, Cambridge CB2 0XY, UK
| | - Young C Jang
- Howard Hughes Medical Institute, USA; Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA; Joslin Diabetes Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02215, USA
| | - Xianhua Piao
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, MA, USA
| | - Rohit N Kulkarni
- Joslin Diabetes Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02215, USA
| | - Thomas Serwold
- Joslin Diabetes Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02215, USA
| | - John E Pimanda
- Lowy Cancer Research Centre, University of New South Wales, Sydney, NSW 2052, Australia; Prince of Wales Clinical School, University of New South Wales, Sydney, NSW 2052, Australia
| | - Amy J Wagers
- Howard Hughes Medical Institute, USA; Department of Stem Cell and Regenerative Biology, Harvard Stem Cell Institute, Harvard University, Cambridge, MA, USA; Joslin Diabetes Center, Boston, MA 02215, USA; Harvard Medical School, Boston, MA 02215, USA.
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32
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Sinha M, Jang YC, Oh J, Khong D, Wu EY, Manohar R, Miller C, Regalado SG, Loffredo FS, Pancoast JR, Hirshman MF, Lebowitz J, Shadrach JL, Cerletti M, Kim MJ, Serwold T, Goodyear LJ, Rosner B, Lee RT, Wagers AJ. Restoring systemic GDF11 levels reverses age-related dysfunction in mouse skeletal muscle. Science 2014; 344:649-52. [PMID: 24797481 DOI: 10.1126/science.1251152] [Citation(s) in RCA: 605] [Impact Index Per Article: 60.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Parabiosis experiments indicate that impaired regeneration in aged mice is reversible by exposure to a young circulation, suggesting that young blood contains humoral "rejuvenating" factors that can restore regenerative function. Here, we demonstrate that the circulating protein growth differentiation factor 11 (GDF11) is a rejuvenating factor for skeletal muscle. Supplementation of systemic GDF11 levels, which normally decline with age, by heterochronic parabiosis or systemic delivery of recombinant protein, reversed functional impairments and restored genomic integrity in aged muscle stem cells (satellite cells). Increased GDF11 levels in aged mice also improved muscle structural and functional features and increased strength and endurance exercise capacity. These data indicate that GDF11 systemically regulates muscle aging and may be therapeutically useful for reversing age-related skeletal muscle and stem cell dysfunction.
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Affiliation(s)
- Manisha Sinha
- Harvard Stem Cell Institute and Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
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33
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Jang YC, Liu Y, Hayworth CR, Bhattacharya A, Lustgarten MS, Muller FL, Chaudhuri A, Qi W, Li Y, Huang JY, Verdin E, Richardson A, Van Remmen H. Dietary restriction attenuates age-associated muscle atrophy by lowering oxidative stress in mice even in complete absence of CuZnSOD. Aging Cell 2012; 11:770-82. [PMID: 22672615 DOI: 10.1111/j.1474-9726.2012.00843.x] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
Age-related loss of muscle mass and function, sarcopenia, has a major impact on the quality of life in the elderly. Among the proposed causes of sarcopenia are mitochondrial dysfunction and accumulated oxidative damage during aging. Dietary restriction (DR), a robust dietary intervention that extends lifespan and modulates age-related pathology in a variety of species, has been shown to protect from sarcopenia in rodents. Although the mechanism(s) by which DR modulates aging are still not defined, one potential mechanism is through modulation of oxidative stress and mitochondrial dysfunction. To directly test the protective effect of DR against oxidative stress-induced muscle atrophy in vivo, we subjected mice lacking a key antioxidant enzyme, CuZnSOD (Sod1) to DR (60% of ad libitum fed diet). We have previously shown that the Sod1(-/-) mice exhibit an acceleration of sarcopenia associated with high oxidative stress, mitochondrial dysfunction, and severe neuromuscular innervation defects. Despite the dramatic atrophy phenotype in the Sod1(-/-) mice, DR led to a reversal or attenuation of reduced muscle function, loss of innervation, and muscle atrophy in these mice. DR improves mitochondrial function as evidenced by enhanced Ca2+ regulation and reduction of mitochondrial reactive oxygen species (ROS). Furthermore, we show upregulation of SIRT3 and MnSOD in DR animals, consistent with reduced mitochondrial oxidative stress and reduced oxidative damage in muscle tissue measured as F2-isoprostanes. Collectively, our results demonstrate that DR is a powerful mediator of mitochondrial function, mitochondrial ROS production, and oxidative damage, providing a solid protection against oxidative stress-induced neuromuscular defects and muscle atrophy in vivo even under conditions of high oxidative stress.
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Affiliation(s)
- Young C Jang
- Department of Cellular and Structural Biology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
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34
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Jang YC, Sinha M, Cerletti M, Dall'Osso C, Wagers AJ. Skeletal muscle stem cells: effects of aging and metabolism on muscle regenerative function. Cold Spring Harb Symp Quant Biol 2011; 76:101-11. [PMID: 21960527 DOI: 10.1101/sqb.2011.76.010652] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Homeostatic and regenerative replacement of skeletal muscle fibers requires the activity of a dedicated pool of myogenic stem cells, called satellite cells, that are activated by muscle injury and act as a renewable source of muscle-forming cells throughout adult life. Satellite cell function is controlled by both intrinsic and extrinsic regulatory cues, whose integration determines the success of muscle regenerative responses. Pathological deregulation of satellite cell function through perturbation of these signaling pathways appears to play an important role in age-dependent deterioration of muscle function and in muscle dystrophic disease. The regenerative activity of skeletal muscle also appears to be tightly linked to metabolism, and alterations in metabolic state can directly influence the activity of these tissue-specific stem cells. Here, we review recent and emerging insights into the molecular and biochemical signals that control satellite cell function and discuss these in the context of muscle degenerative diseases such as dystrophy and sarcopenia. Novel discoveries from this ongoing work bring new opportunities to enhance or restore muscle repair and are likely to facilitate satellite cell transplantation in clinical applications.
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Affiliation(s)
- Y C Jang
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, Massachusetts 02138
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35
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Lustgarten MS, Jang YC, Song W, Liu Y, Pierce A, deWaal E, Chaudhuri A, Qi W, Van Remmen H. The Effect of Voluntary Wheel Running on Muscle Mass, Mitochondrial Function and Oxidative Damage in Sod1???/???mice. Med Sci Sports Exerc 2006. [DOI: 10.1249/00005768-200611001-00045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Abstract
The steam burn caused by an electric rice-cooker is a unique mode of burn injury in Asian countries, especially Korea and Japan. This type of burn injury is characterized by 1) occurring most frequently on the volar aspect of the hand in toddlers younger than 2 years of age (92.8%); 2) the depth of burns are normally deep second-degree to third-degree (98%) and usually need surgery at the time of injury; 3) flexion contractures of multiple finger joints and web space contracture are common sequelae. We hypothesized that primary full-thickness skin graft (FTSG) would give more reliable results and eliminate the late reconstructive procedures. Between January 1997 and September 1999, 36 patients underwent primary FTSG, and the results of this primary FTSG group were compared with 124 patients who were treated with split-thickness skin graft (STSG; 79/124; 63.7%) or by conservative management (45/124; 36.3%), and readmitted for the correction of hand deformities between September 1995 and September 1999. In the primary FTSG group, 11.1% (4/36) of mild web contractures and 5.5% (2/36) of finger joint contractures were documented, and these did not require the reconstructive procedure during a follow-up period of 8.8 +/- 4.8 months. In 124 patients of the primary STSG or conservative group, the mean time interval to reoperation was 8.9 +/- 4.0 months and all patients received FTSG for correction of late hand deformities. In a retrospective study of the primary STSG group, 42 of 53 patients (79.2%) received reconstructive procedure during a 5-year follow-up period. In this report, we introduce the nature of steam burn caused by electric rice-cooker and propose that primary FTSG may be a reliable method for the treatment of this more severe type of acute burn in pediatric patients.
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Affiliation(s)
- Y C Jang
- Department of Plastic and Reconstructive Surgery, Hallym University, Hangang Sacred Heart Hospital, Seoul, Korea
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37
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Abstract
The objective of this study was to characterize recovered soil fines from construction and demolition (C&D) waste recycling facilities for trace organic pollutants. Over a period of 18 months, five sampling trips were made to 14 C&D waste recycling facilities in Florida. Screened soil fines were collected from older stockpiles and newly generated piles at the sites. The samples were analyzed for the total concentration (mg/kg) of a series of volatile organic compound (VOCs) and semi-volatile organic compounds (semi-VOCs). The synthetic precipitation leaching procedure (SPLP) test was also performed to evaluate the leachability of the trace organic chemicals. During the total analysis only a few volatile organic compounds were commonly found in the samples (trichlorofluoromethane, toluene, 4-isopropyltoluene, trimethylbenzene, xylenes, and methylene chloride). A total of nine VOCs were detected in the leaching test. Toluene showed the highest leachability among the compounds (61.3-92.0%), while trichlorofluoromethane, the most commonly detected compound from both the total and leaching tests, resulted in the lowest leachability (1.4-39.9%). For the semi-VOC analysis, three base-neutral semi-VOC compounds (bis(2-ethylhexyl)phthalate, butyl benzyl phthalate, and di-n-butyl phthalate) and several PAHs (acenaphthene, pyrene, fluoranthene, and phenanthrene) were commonly detected in C&D fines samples. These compounds also leached during the SPLP leaching test (0.1-25%). No acid extractable compounds, pesticides, or PCBs were detected. The results of this study were further investigated to assess risk from land applied recovered soil fines by comparing total and leaching concentrations of recovered soil fines samples to risk-based standards. The results of this indicate that the organic chemicals in recovered soil fines from C&D debris recycling facilities were not of a major concern in terms of human risk and leaching risk to groundwater under reuse and contact scenarios.
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Affiliation(s)
- Y C Jang
- Environmental Engineering Sciences, University of Florida, Gainesville 32611-6450, USA
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Abstract
Hemangiomas appear at birth and undergo gradual regression within several years. Recent published studies have documented increased nerve numbers in port-wine stains and intramuscular vascular tumors. The aim of this study was to establish a relationship between angiogenesis and nerve growth in lesions that undergo neovascular proliferation followed by vessel involution. Twenty-two hemangiomas and arteriovenous malformations were studied using indirect immunocytochemistry with antibodies against the nerve markers protein gene product 9.5 (PGP 9.5) and calcitonin gene-related peptide (CGRP). Nerves and vessels were counted and compared. Our results indicate that PGP 9.5(+) and CGRP(+) nerves were most numerous in growing hemangiomas and numbers were reduced in involuting hemangiomas and vascular malformations. The percentage of CGRP(+) sensory nerves was markedly increased in growing hemangiomas (45.3%) compared with involuting hemangiomas (21.2). These data indicate that hemangiomas with increasing neovascularization have increased sensory nerve growth. Sensory nerve-derived neuropeptides are known to act as endothelial cell mitogens and may contribute to the angiogenesis in these vascular tumors. Conversely, angiogenic endothelial cells may secrete mediators that promote nerve fiber growth. These results suggest that endothelial cell proliferation and sensory nerve fiber growth may be closely related.
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Affiliation(s)
- Y C Jang
- Department of Surgery, Harborview Medical Center, 325 Ninth Avenue, Seattle, Washington 98104, USA
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Jang YC, Tsou R, Gibran NS, Isik FF. Vitronectin deficiency is associated with increased wound fibrinolysis and decreased microvascular angiogenesis in mice. Surgery 2000; 127:696-704. [PMID: 10840366 DOI: 10.1067/msy.2000.105858] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Vitronectin has several putative functions including regulating hemostasis, cell adhesion, and cell migration. However, the targeted deletion of vitronectin in mice results in normal development and normal coagulation parameters. To determine whether vitronectin may be necessary for nondevelopmental processes, we examined the response to tissue injury in vitronectin-null mice. METHODS We examined wound healing in control and vitronectin-null mice by healing rate, zymography, reverse zymography, and Western blots. RESULTS We found that dermal wound healing was slightly delayed in mice lacking vitronectin. More importantly, we found extensive areas of delayed hemorrhage near the sprouting tips of microvessels between days 7 and 14, which temporally coincided with increased urokinase-type plasminogen activator and tissue-type plasminogen activator activity by zymography. Though Western blots confirmed the presence of plasminogen activator inhibitor-1 protein throughout wound repair and reverse zymograms showed decreased plasminogen activator inhibitor-1 activity between days 7 and 14. CONCLUSIONS Loss of vitronectin in mice was associated with changes in the fibrinolytic balance, and this may have led to focal sites of delayed hemorrhage. The mechanism that resulted in decreased angiogenesis and the formation of larger blood vessels in response to tissue injury remains unknown. This study suggests that vitronectin may have several distinct functions that are not required for normal development but are manifested in response to tissue injury.
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Affiliation(s)
- Y C Jang
- Department of Surgery, Puget Sound Health Care System, Seattle, Washington, USA
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Abstract
Angiogenesis, the formation of new blood vessels from pre-existing blood vessels, is thought to be critical for wound repair. Yet few studies have critically examined dermal wound repair in a system in which angiogenesis was impaired. Since alpha(v)-containing integrins are critical for angiogenesis, we administered either an alpha(v) integrin blocking antibody or cyclic Arg-Gly-Asp peptide into a murine excisional wound model to restrict wound angiogenesis. Although both methods markedly decreased wound angiogenesis, decreased angiogenesis had no significant effect on wound epithelization, contraction, or ultimate wound closure. These results suggest that if other cellular components of wound healing are intact, moderate impairment of angiogenesis alone does not necessarily retard normal wound healing.
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Affiliation(s)
- Y C Jang
- Department of Surgery, VA Puget Sound Health Care System and University of Washington Medical Center, Seattle 98108, USA
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Arumugam S, Jang YC, Chen-Jensen C, Gibran NS, Isik FF. Temporal activity of plasminogen activators and matrix metalloproteinases during cutaneous wound repair. Surgery 1999; 125:587-93. [PMID: 10372023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
BACKGROUND Response to tissue injury begins with the deposition of a fibrin-rich clot or the provisional matrix. The provisional matrix consists of plasma-borne matrix molecules that serve as scaffolding for the ensuing migration of cells. During wound repair multiple cell types must migrate through the clot-matrix scaffolding. The migration of these cells through the matrix is dependent on the activity of the fibrinolytic and proteolytic systems, which include the plasminogen activator (PA) system and matrix metalloproteinases (MMP). The aim of this study was to better understand the temporal activity of these enzymes during normal wound repair. METHODS We used the murine excisional wound model and extracted proteins under nonreducing conditions. With use of gelatin and casein zymography, we determined the activity of the MMPs during the course of wound repair. In addition, we quantified the activity of MMP-2 and MMP-9 by a standardized assay. Plasminogen zymograms were used to detect urokinase PA and tissue PA activity. Western blots were used to detect the natural inhibitor of PAs, plasminogen activator inhibitor type 1. RESULTS Our results demonstrate the temporal activity of MMP-2, MMP-3, MMP-7, and MMP-9 during the course of normal dermal repair. The activity of urokinase PA and tissue PA were also determined; it preceded the activity of the MMPs. CONCLUSIONS We demonstrate the temporal activity of the 2 protease families, MMPs and PAs, in the normal process of cutaneous wound healing.
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Affiliation(s)
- S Arumugam
- University of Illinois College of Medicine, Chicago, USA
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Abstract
BACKGROUND Hemangiomas offer an uncommon opportunity to study rapid vessel growth and spontaneous regression of a vascular human tumor. In contrast, venous malformations are another type of vascular tumor that grows slowly without spontaneous involution. Extracellular matrix (ECM) molecules modulate the responsiveness of endothelial cells to mitogenic stimuli such as basic fibroblast growth factor (bFGF), a well-recognized stimulant of angiogenesis. In this study we hypothesized that in hemangiomas, sites of angiogenesis may have a different ECM composition than sites of vascular regression. MATERIALS AND METHODS Using immunohistochemistry, we analyzed proliferating hemangiomas, regressing hemangiomas, venous malformations, and normal skin for the basement membrane ECM molecules collagen IV and laminin and plasma-borne ECM molecules fibronectin and vitronectin. We used metabolic labeling to determine whether primary human dermal microvascular endothelial cells regulated FGFR-1 or FGFR-2 when grown on these different matrices. RESULTS We found that proliferating hemangiomas showed extensive deposition of vitronectin in the subendothelial space. In contrast, regressing hemangiomas or venous malformations did not show vitronectin deposition. Venous malformations, which are composed of ectatic lakes of venous channels, also lacked laminin in their basement membranes. We also found that cultured microvascular endothelial cells grown on vitronectin increased synthesis of FGFR-1 and FGFR-2 protein. CONCLUSIONS Changes in the ECM environment occur in conjunction with the angiogenic state of a vascular human tumor. Furthermore, changes in the ECM environment alone can directly regulate synthesis of angiogenic growth factor receptors.
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Affiliation(s)
- Y C Jang
- Department of Surgery, University of Washington Medical Center, Seattle, Washington, 98108, USA
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Abstract
Angiogenesis after tissue injury occurs in a matrix environment consisting of fibrin, fibronectin, and vitronectin as the major extracellular matrix (ECM) constituents. ECM-integrin interactions is critical for angiogenesis and failure to bind a ligand to certain integrin receptors (alpha[v]beta3 or alpha[v]beta5) inhibits angiogenesis. The ligand that binds to alpha(v)beta3 or alpha(v)beta5 integrin receptors during microvascular angiogenesis has not been identified. Our hypothesis is that provisional matrix molecules provide the environmental context cues to microvascular endothelial cells and promote angiogenesis by decreased programmed cell death. Using cultured human microvascular endothelial cells, we show that vitronectin, in comparison to growth on alternative provisional matrix molecules (fibronectin, fibrinogen plus thrombin), collagen I, and basement membrane molecules (collagen IV), significantly reduces microvascular endothelial cell death in vitro. This reduction was observed using morphologic criteria, TdT-mediated dUTP nick end labeling (TUNEL) assay, histone release into the cytoplasm, and thymidine release into the supernatant. Though our data confirm that vitronectin may bind to more than one integrin receptor to reduce MEC apoptosis, binding to the alpha(v) component appears to be the critical integrin subcomponent for reducing apoptosis.
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Affiliation(s)
- F F Isik
- Department of Surgery, University of Washington Medical Center, Seattle, USA.
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Abstract
Vasoactive intestinal peptide (VIP) is known to signal via Gs mediated pathways. VIP stimulated c-fos mRNA expression in a clonal GH3 pituitary tumour cell line, GH3Ca, whereas 8-Br-cAMP only moderately induced c-fos expression. The VIP-induced c-fos expression was inhibited in the presence of EGTA, or the L-type Ca2+ channel blockers verapamil and nifedipine. Measurement of intracellular Ca2+ concentration ([Ca2+]i) by Fura-2 indicates that VIP gradually elevates [Ca2+]i, with the maximum level attained at 4 min following hormone addition. No [Ca2+]i increase could be detected in Ca2+ free buffer or in buffer containing nifedipine or verapamil, which suggests that VIP induced Ca2+ entry from L-type Ca2+ channels. 8-Br-cAMP rapidly increased [Ca2+]i, with a maximum concentration attained within 1 min of its addition and the elevated level maintained for 15 min. In the absence of external Ca2+ or in the presence of verapamil or nifedipine, the sustained Ca2+ increase was abolished whereas the transient Ca2+ peak was unaffected. Depletion of the internal calcium pools by thapsigargin (1 microM, 30 min), on the other hand, blocked the rapid transient [Ca2+], rise, suggesting the biphasic [Ca2+]i elicited by 8-Br-cAMP was due to mobilization from internal Ca2+ pool followed by extracellular flow. Interestingly, pretreatment with thapsigargin greatly potentiated the 8-Br-cAMP-stimulated c-fos expression. Pretreatment of cells with cholera toxin (1 microg/ml, 9 h) to deplete Gs proteins abolished VIP stimulated-[Ca2+] elevation, while it had little effect on the 8-Br-cAMP induced [Ca2+]i rise. Our results show that VIP increased Ca2+ influx from L-type channel through a Gs-mediated mechanism and this Ca2+ entry across the plasma membrane plays a major role in the hormone induced c-fos mRNA expression.
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Affiliation(s)
- Y C Jang
- Institute of Biochemistry, National Yang-Ming University, Taipei, Taiwan, ROC
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Lin JH, Jang YC, Wen DC, Wang FF. Synergistic activation of cAMP and calcium on cAMP-response-element-mediated gene expression in GH3 pituitary tumor cells. Cell Signal 1996; 8:111-5. [PMID: 8730512 DOI: 10.1016/0898-6568(95)02037-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Signals responsible for expression of the vasoactive intestinal peptide (VIP)-stimulated prolactin gene in GH3 pituitary tumor cells were examined. Transfection with a deoxyribonucleic acid (DNA) construct containing the chloramphenicol acetyltransferase (CAT) gene fused to the 2.5-kb prolactin 5'-upstream regulatory sequence indicated that VIP stimulated CAT expression. However, this effect could not be mimicked by 8-bromo-cyclic adenosine monophosphate (8-Br-cAMP), and was inhibited by the L-type Ca(2+)-channel blocker verapamil. While KCl had little effect on CAT activity, combined treatment with KCl and 8-Br-cAMP synergistically activated CAT expression. Potentiation between KCl and 8-Br-c-AMP was also seen with c-fos messenger ribonucleic acid (mRNA) expression. In addition, KCl and 8-Br-cAMP synergistically activated cAMP response element (CRE)-mediated CAT expression, and the synergism was abolished by verapamil. In the presence of okadaic acid, cAMP had no significant activation on CRE-driven CAT expression, whereas KCl-stimulated CAT expression was greatly potentiated. These results indicate that cAMP and Ca2+ synergistically activated CRE-driven gene expression through non-overlapping phosphorylation events in GH3 cells.
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Affiliation(s)
- J H Lin
- Institute of Biochemistry, National Yang-Ming University, Taipei, Taiwan, Republic of China
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Wan WC, Jang YC, Huang LY, Liao CF, Yu JY. Simulatory hypothyroidism pituitary function in vitro: dynamics of TSH release after TRH stimulation in perifused rat hemipituitaries. Proc Natl Sci Counc Repub China B 1984; 8:282-91. [PMID: 6443787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The production of immunoreactive TSH by hemipituitaries (Hps) to the stimulation of TRH in perifusion with negligible influence of the feedback of secretogogues and hormones was analysed. The stimulations were of long term continuous (3 hrs) and short term (15 min), with the dose levels of 1, 10 and 100 ng per ml of medium (for 3 hrs) or in 2 ml (for 15 min). The largest amount in production and the fastest rate in release of TSH found in present report is at 10 ng level. Only total TSH, in tissue plus in medium, after continuous TRH stimulation were dose-related, but not in release alone. We present herein an analysis of pituitary TSH production, in a perifusion system under steady TRH stimulation. This arrangement is believed to be a condition simulating hypothyroidism in pituitary level and suitable for study of the functions of the pituitary with hyperactivated thyrotrophs.
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