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Yoshida S, Fujimoto T, Takahashi T, Sugimoto K, Akasaka H, Tanaka M, Huang Y, Yasunobe Y, Xie K, Ohnishi Y, Minami T, Takami Y, Yamamoto K, Rakugi H. IL-15RA regulates IL-15 localization and protein expression in skeletal muscle cells. Exp Physiol 2022; 107:222-232. [PMID: 35100657 DOI: 10.1113/ep090205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/24/2022] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? How are the dynamics of IL-15 and its receptors altered during the differentiation of myoblasts into myotubes, and how is IL-15 regulated? What is the main finding and its importance? ABSTRACT Interleukin-15 (IL-15) is a myokine in the Interleukin-2 (IL-2) family that is generated in the skeletal muscle during exercise. The functional effect of IL-15 involves muscle regeneration and metabolic regulation in skeletal muscle. Reports have indicated that the mechanism of Interleukin-15 receptor subunit alpha (IL-15RA) regulates IL-15 localization in immune cells. However, the dynamic of IL-15 and its receptors, which regulate the IL-15 pathway in skeletal muscle differentiation, have not yet been clarified. This study investigated the mechanism of IL-15 regulation using a mouse skeletal muscle cell line, C2C12 cells. We found that the mRNA expression of IL-15, Interleukin 2 Receptor Subunit Beta (IL-2RB) (CD122), and Interleukin 2 Receptor Subunit Gamma (IL-2RG) (CD132) increased, but that IL-15RA exhibits different kinetics as differentiation progresses. We also found that IL-15, mainly localized in the cytosol, preassembled with IL-15RA in the cytosol and fused to the plasma membrane. Moreover, IL-15RA increased IL-15 protein levels. Our findings suggest that genes comprising the IL-15 signaling complex are enhanced with the differentiation of myotubes and that IL-15RA regulates the protein kinetics of IL-15 signaling in skeletal muscle. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Shino Yoshida
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Taku Fujimoto
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan.,Institute for Biogenesis Research, Department of Anatomy Biochemistry and Physiology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, 96813, USA
| | - Toshimasa Takahashi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Ken Sugimoto
- Department of General and Geriatric Medicine, Kawasaki Medical University, Okayama, 700-8505, Japan
| | - Hiroshi Akasaka
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Minoru Tanaka
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan.,Department of Rehabilitation Science, Graduate School of Health Sciences, Kobe University, Kobe, Hyogo, 654-0142, Japan.,Department of Rehabilitation Science, Osaka Health Science University, Osaka, 530-0043, Japan
| | - Yibin Huang
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Yukiko Yasunobe
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Keyu Xie
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Yuri Ohnishi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Tomohiro Minami
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Yoichi Takami
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Koichi Yamamoto
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
| | - Hiromi Rakugi
- Department of Geriatric and General Medicine, Osaka University Graduate School of Medicine, Suita, Osaka, 565-0871, Japan
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Zumbaugh MD, Yen CN, Bodmer JS, Shi H, Gerrard DE. Skeletal Muscle O-GlcNAc Transferase Action on Global Metabolism Is Partially Mediated Through Interleukin-15. Front Physiol 2021; 12:682052. [PMID: 34326778 PMCID: PMC8313823 DOI: 10.3389/fphys.2021.682052] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 06/24/2021] [Indexed: 01/11/2023] Open
Abstract
Besides its roles in locomotion and thermogenesis, skeletal muscle plays a significant role in global glucose metabolism and insulin sensitivity through complex nutrient sensing networks. Our previous work showed that the muscle-specific ablation of O-GlcNAc transferase (OGT) led to a lean phenotype through enhanced interleukin-15 (IL-15) expression. We also showed OGT epigenetically modified and repressed the Il15 promoter. However, whether there is a causal relationship between OGT ablation-induced IL-15 secretion and the lean phenotype remains unknown. To address this question, we generated muscle specific OGT and interleukin-15 receptor alpha subunit (IL-15rα) double knockout mice (mDKO). Deletion of IL-15rα in skeletal muscle impaired IL-15 secretion. When fed with a high-fat diet, mDKO mice were no longer protected against HFD-induced obesity compared to wild-type mice. After 22 weeks of HFD feeding, mDKO mice had an intermediate body weight and glucose sensitivity compared to wild-type and OGT knockout mice. Taken together, these data suggest that OGT action is partially mediated by muscle IL-15 production and provides some clarity into how disrupting the O-GlcNAc nutrient signaling pathway leads to a lean phenotype. Further, our work suggests that interfering with the OGT-IL15 nutrient sensing axis may provide a new avenue for combating obesity and metabolic disorders.
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Affiliation(s)
- Morgan D Zumbaugh
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Con-Ning Yen
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Jocelyn S Bodmer
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - Hao Shi
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
| | - David E Gerrard
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States
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He Y, Yu Y, Li Y, Duan W, Sun Z, Yang J, Kastin AJ, Pan W, Zhang Y, Wang K. Phenotypic Resemblance to Neuropsychiatric Disorder and Altered mRNA Profiles in Cortex and Hippocampus Underlying IL15Rα Knockout. Front Neurosci 2021; 14:582279. [PMID: 33613171 PMCID: PMC7887313 DOI: 10.3389/fnins.2020.582279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Accepted: 12/23/2020] [Indexed: 01/05/2023] Open
Abstract
Background Previous studies of the functions of IL15Rα have been limited to immune activities and skeletal muscle development. Immunological factors have been identified as one of the multiple causes of psychosis, and neurological symptoms have been described in IL15Rα knockout (KO) mice. Seeking to explore possible mechanisms for this in the IL15Rα-/- mouse brain, we analyzed gene expression patterns in the cortex and hippocampus using the RNA-seq technique. Methods IL15Rα KO mice were generated and littermate wildtype (WT) mice were used as a control group. A Y-maze was used to assess behavior differences between the two groups. The cortex and hippocampus of 3-month-old male mice were prepared and RNA-seq and transcriptome analysis were performed by gene set enrichment analysis (GSEA). Results Compared with the WT group, IL15Rα KO animals showed higher speed in the novel arm and more entrance frequency in the old arm in the Y-maze experiment. GSEA indicated that 18 pathways were downregulated and 13 pathways upregulated in both cortex and hippocampus from the GO, KEGG, and Hallmark gene sets. The downregulated pathways formed three clusters: respiratory chain and electron transport, regulation of steroid process, and skeletal muscle development. Conclusion IL15Rα KO mice exhibit altered expression of multiple pathways, which could affect many functions of the brain. Lipid biosynthesis and metabolism in the central nervous system (CNS) should be investigated to provide insights into the effect of IL15Rα on psychosis in this murine model.
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Affiliation(s)
- Yi He
- The National Clinical Research Center for Mental Disorders, Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China.,Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Yuxin Yu
- Department of Endocrinology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanan Li
- Department of Gastrointestinal Surgery, Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Weicheng Duan
- Department of Forensic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zuoli Sun
- The National Clinical Research Center for Mental Disorders, Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China.,Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Jian Yang
- The National Clinical Research Center for Mental Disorders, Beijing Key Laboratory of Mental Disorders, Beijing Anding Hospital, Capital Medical University, Beijing, China.,Advanced Innovation Center for Human Brain Protection, Capital Medical University, Beijing, China
| | - Abba J Kastin
- Pennington Biomedical Research Center, Baton Rouge, LA, United States
| | - Weihong Pan
- BioPotentials Consult, Sedona, AZ, United States
| | - Yan Zhang
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kang Wang
- Department of Forensic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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Nadeau L, Aguer C. Interleukin-15 as a myokine: mechanistic insight into its effect on skeletal muscle metabolism. Appl Physiol Nutr Metab 2019; 44:229-238. [DOI: 10.1139/apnm-2018-0022] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Interleukin (IL)-15 is a cytokine with important immunological functions. It is highly expressed in skeletal muscle and is believed to be a myokine, a hypothesis supported by the rapid increase in circulating levels of IL-15 in response to exercise. Treatment with high doses of IL-15 results in metabolic adaptations such as improved insulin sensitivity and whole-body fatty acid oxidation and protection from high-fat-diet-induced obesity and insulin resistance. IL-15 secreted by contracting muscle may therefore act as an endocrine factor to improve adiposity and energy metabolism in different tissues. Most studies have used supraphysiological doses of IL-15 that do not represent circulating IL-15 in response to exercise. However, evidence shows that IL-15 levels are higher in muscle interstitium and that IL-15 might improve muscle glucose homeostasis and oxidative metabolism in an autocrine/paracrine manner. Nevertheless, how IL-15 signals in skeletal muscle to improve muscle energy metabolism is not understood completely, especially because the absence of the α subunit of the IL-15 receptor (IL-15Rα) results in a phenotype similar to that of overexpressing/oversecreting IL-15 in mice. In this article, we review the literature to propose a model for the regulation of IL-15 by the soluble form of IL-15Rα to explain why some findings in the literature seem, at first glance, to be contradictory.
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Affiliation(s)
- Lucien Nadeau
- Institut du Savoir Montfort – Recherche, 713 Montreal Road, Ottawa, ON K1K 0T2, Canada
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Céline Aguer
- Institut du Savoir Montfort – Recherche, 713 Montreal Road, Ottawa, ON K1K 0T2, Canada
- Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
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Pérez-López A, Calbet JAL. Discussion of "Interleukin-15 as a myokine: mechanistic insight into its effect on skeletal muscle metabolism" - Interleukin-15 and interleukin-15Rα-dependent/-independent functions in human skeletal muscle are largely unknown. Appl Physiol Nutr Metab 2019; 44:336-337. [PMID: 30789310 DOI: 10.1139/apnm-2018-0769] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Alberto Pérez-López
- a Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Alcalá de Henares, Madrid 28871, Spain
| | - Jose A L Calbet
- b Research Institute of Biomedical and Health Sciences (IUIBS), Las Palmas de Gran Canaria, Spain.,c Department of Physical Education, Faculty of Physical Education, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
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Wilson HE, Rhodes KK, Rodriguez D, Chahal I, Stanton DA, Bohlen J, Davis M, Infante AM, Hazard-Jenkins H, Klinke DJ, Pugacheva EN, Pistilli EE. Human Breast Cancer Xenograft Model Implicates Peroxisome Proliferator-activated Receptor Signaling as Driver of Cancer-induced Muscle Fatigue. Clin Cancer Res 2018; 25:2336-2347. [PMID: 30559167 DOI: 10.1158/1078-0432.ccr-18-1565] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 10/19/2018] [Accepted: 12/12/2018] [Indexed: 01/06/2023]
Abstract
PURPOSE This study tested the hypothesis that a patient-derived orthotopic xenograft (PDOX) model would recapitulate the common clinical phenomenon of breast cancer-induced skeletal muscle (SkM) fatigue in the absence of muscle wasting. This study additionally sought to identify drivers of this condition to facilitate the development of therapeutic agents for patients with breast cancer experiencing muscle fatigue. EXPERIMENTAL DESIGN Eight female BC-PDOX-bearing mice were produced via transplantation of tumor tissue from 8 female patients with breast cancer. Individual hind limb muscles from BC-PDOX mice were isolated at euthanasia for RNA-sequencing, gene and protein analyses, and an ex vivo muscle contraction protocol to quantify tumor-induced aberrations in SkM function. Differentially expressed genes (DEG) in the BC-PDOX mice relative to control mice were identified using DESeq2, and multiple bioinformatics platforms were employed to contextualize the DEGs. RESULTS We found that SkM from BC-PDOX-bearing mice showed greater fatigability than control mice, despite no differences in absolute muscle mass. PPAR, mTOR, IL6, IL1, and several other signaling pathways were implicated in the transcriptional changes observed in the BC-PDOX SkM. Moreover, 3 independent in silico analyses identified PPAR signaling as highly dysregulated in the SkM of both BC-PDOX-bearing mice and human patients with early-stage nonmetastatic breast cancer. CONCLUSIONS Collectively, these data demonstrate that the BC-PDOX model recapitulates the expected breast cancer-induced SkM fatigue and further identify aberrant PPAR signaling as an integral factor in the pathology of this condition.
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Affiliation(s)
- Hannah E Wilson
- MD/PhD Medical Scientist Program, West Virginia University School of Medicine, Morgantown, West Virginia.,Cancer Institute, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Kacey K Rhodes
- Cancer Institute, West Virginia University School of Medicine, Morgantown, West Virginia.,Department of Biochemistry, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Daniel Rodriguez
- Statler College of Engineering and Mineral Resources, West Virginia University, Morgantown, West Virginia
| | - Ikttesh Chahal
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, West Virginia
| | - David A Stanton
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Joseph Bohlen
- Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Mary Davis
- Department of Physiology, Pharmacology and Neuroscience, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Aniello M Infante
- Genomics Core Facility, West Virginia University, Morgantown, West Virginia
| | - Hannah Hazard-Jenkins
- Department of Surgery, West Virginia University School of Medicine, Morgantown, West Virginia
| | - David J Klinke
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Elena N Pugacheva
- Cancer Institute, West Virginia University School of Medicine, Morgantown, West Virginia.,Department of Biochemistry, West Virginia University School of Medicine, Morgantown, West Virginia
| | - Emidio E Pistilli
- Cancer Institute, West Virginia University School of Medicine, Morgantown, West Virginia. .,Division of Exercise Physiology, Department of Human Performance, West Virginia University School of Medicine, Morgantown, West Virginia.,Department of Microbiology, Immunology, and Cell Biology, West Virginia University School of Medicine, Morgantown, West Virginia.,West Virginia Clinical and Translational Sciences Institute, West Virginia University School of Medicine, Morgantown, West Virginia
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7
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Bohlen J, McLaughlin SL, Hazard‐Jenkins H, Infante AM, Montgomery C, Davis M, Pistilli EE. Dysregulation of metabolic-associated pathways in muscle of breast cancer patients: preclinical evaluation of interleukin-15 targeting fatigue. J Cachexia Sarcopenia Muscle 2018; 9:701-714. [PMID: 29582584 PMCID: PMC6104109 DOI: 10.1002/jcsm.12294] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 11/27/2017] [Accepted: 01/31/2018] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Breast cancer patients report a perception of increased muscle fatigue, which can persist following surgery and standardized therapies. In a clinical experiment, we tested the hypothesis that pathways regulating skeletal muscle fatigue are down-regulated in skeletal muscle of breast cancer patients and that different muscle gene expression patterns exist between breast tumour subtypes. In a preclinical study, we tested the hypothesis that mammary tumour growth in mice induces skeletal muscle fatigue and that overexpression of the cytokine interleukin-15 (IL-15) can attenuate mammary tumour-induced muscle fatigue. METHODS Early stage non-metastatic female breast cancer patients (n = 14) and female non-cancer patients (n = 6) provided a muscle biopsy of the pectoralis major muscle during mastectomy, lumpectomy, or breast reconstruction surgeries. The breast cancer patients were diagnosed with either luminal (ER+ /PR+ , n = 6), triple positive (ER+ /PR+ /Her2/neu+ , n = 5), or triple negative (ER- /PR- /Her2/neu- , n = 3) breast tumours and were being treated with curative intent either with neoadjuvant chemotherapy followed by surgery or surgery followed by standard post-operative therapy. Biopsies were used for RNA-sequencing to compare the skeletal muscle gene expression patterns between breast cancer patients and non-cancer patients. The C57BL/6 mouse syngeneic mammary tumour cell line, E0771, was used to induce mammary tumours in immunocompetent mice, and isometric muscle contractile properties and fatigue properties were analysed following 4 weeks of tumour growth. RESULTS RNA-sequencing and subsequent bioinformatics analyses revealed a dysregulation of canonical pathways involved in oxidative phosphorylation, mitochondrial dysfunction, peroxisome proliferator-activated receptor signalling and activation, and IL-15 signalling and production. In a preclinical mouse model of breast cancer, the rate of muscle fatigue was greater in mice exposed to mammary tumour growth for 4 weeks, and this greater muscle fatigue was attenuated in transgenic mice that overexpressed the cytokine IL-15. CONCLUSIONS Our data identify novel genes and pathways dysregulated in the muscles of breast cancer patients with early stage non-metastatic disease, with particularly aberrant expression among genes that would predispose these patients to greater muscle fatigue. Furthermore, we demonstrate that IL-15 overexpression can attenuate muscle fatigue associated with mammary tumour growth in a preclinical mouse model of breast cancer. Therefore, we propose that skeletal muscle fatigue is an inherent consequence of breast tumour growth, and this greater fatigue can be targeted therapeutically.
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Affiliation(s)
- Joseph Bohlen
- Division of Exercise Physiology, Department of Human PerformanceWest Virginia University School of MedicineMorgantownWV26506USA
| | - Sarah L. McLaughlin
- Cancer InstituteWest Virginia University School of MedicineMorgantownWV26506USA
| | - Hannah Hazard‐Jenkins
- Department of SurgeryWest Virginia University School of MedicineMorgantownWV26506USA
| | | | - Cortney Montgomery
- Cancer InstituteWest Virginia University School of MedicineMorgantownWV26506USA
| | - Mary Davis
- Department of Physiology and PharmacologyWest Virginia University School of MedicineMorgantownWV26506USA
| | - Emidio E. Pistilli
- Division of Exercise Physiology, Department of Human PerformanceWest Virginia University School of MedicineMorgantownWV26506USA
- Cancer InstituteWest Virginia University School of MedicineMorgantownWV26506USA
- Department of Microbiology, Immunology and Cell BiologyWest Virginia University School of MedicineMorgantownWV26506USA
- West Virginia Clinical and Translational Sciences InstituteWest Virginia University School of MedicineMorgantownWV26506USA
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Johnson JM, Ferrara PJ, Verkerke ARP, Coleman CB, Wentzler EJ, Neufer PD, Kew KA, de Castro Brás LE, Funai K. Targeted overexpression of catalase to mitochondria does not prevent cardioskeletal myopathy in Barth syndrome. J Mol Cell Cardiol 2018; 121:94-102. [PMID: 30008435 DOI: 10.1016/j.yjmcc.2018.07.001] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 06/20/2018] [Accepted: 07/01/2018] [Indexed: 12/25/2022]
Abstract
Barth Syndrome (BTHS) is an X-linked recessive disorder characterized by cardiomyopathy and muscle weakness. The underlying cause of BTHS is a mutation in the tafazzin (TAZ) gene, a key enzyme of cardiolipin biosynthesis. The lack of CL arising from loss of TAZ function results in destabilization of the electron transport system, promoting oxidative stress that is thought to contribute to development of cardioskeletal myopathy. Indeed, in vitro studies demonstrate that mitochondria-targeted antioxidants improve contractile capacity in TAZ-deficient cardiomyocytes. The purpose of the present study was to determine if resolving mitochondrial oxidative stress would be sufficient to prevent cardiomyopathy and skeletal myopathy in vivo using a mouse model of BTHS. To this end we crossed mice that overexpress catalase in the mitochondria (MCAT mice) with TAZ-deficient mice (TAZKD) to produce TAZKD mice that selectively overexpress catalase in the mitochondria (TAZKD+MCAT mice). TAZKD+MCAT mice exhibited decreased mitochondrial H2O2 emission and lipid peroxidation compared to TAZKD littermates, indicating decreased oxidative stress. Despite the improvements in oxidative stress, TAZKD+MCAT mice developed cardiomyopathy and mild muscle weakness similar to TAZKD littermates. These findings indicate that resolving oxidative stress is not sufficient to suppress cardioskeletal myopathy associated with BTHS.
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Affiliation(s)
- Jordan M Johnson
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA; Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA; Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, UT, USA; East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, NC, USA; Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Patrick J Ferrara
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA; Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA; Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, UT, USA; East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, NC, USA; Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Anthony R P Verkerke
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA; Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA; Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, UT, USA; East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, NC, USA; Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Chanel B Coleman
- East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, NC, USA; Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - Edward J Wentzler
- East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, NC, USA; Department of Kinesiology, East Carolina University, Greenville, NC, USA
| | - P Darrell Neufer
- East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, NC, USA; Department of Kinesiology, East Carolina University, Greenville, NC, USA; Department of Physiology, East Carolina University, Greenville, NC, USA
| | - Kimberly A Kew
- Department of Chemistry, East Carolina University, Greenville, NC, USA
| | | | - Katsuhiko Funai
- Diabetes & Metabolism Research Center, University of Utah, Salt Lake City, UT, USA; Department of Nutrition & Integrative Physiology, University of Utah, Salt Lake City, UT, USA; Department of Physical Therapy & Athletic Training, University of Utah, Salt Lake City, UT, USA; East Carolina Diabetes & Obesity Institute, East Carolina University, Greenville, NC, USA; Department of Kinesiology, East Carolina University, Greenville, NC, USA; Department of Physiology, East Carolina University, Greenville, NC, USA; Program in Molecular Medicine, University of Utah, Salt Lake City, UT, USA.
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9
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Loro E, Ramaswamy G, Chandra A, Tseng WJ, Mishra MK, Shore EM, Khurana TS. IL15RA is required for osteoblast function and bone mineralization. Bone 2017; 103:20-30. [PMID: 28602725 PMCID: PMC5598756 DOI: 10.1016/j.bone.2017.06.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 06/02/2017] [Accepted: 06/02/2017] [Indexed: 12/12/2022]
Abstract
Interleukin-15 receptor alpha (IL15RA) is an important component of interleukin-15 (IL15) pro-inflammatory signaling. In addition, IL15 and IL15RA are present in the circulation and are detected in a variety of tissues where they influence physiological functions such as muscle contractility and overall metabolism. In the skeletal system, IL15RA was previously shown to be important for osteoclastogenesis. Little is known, however, about its role in osteoblast function and bone mineralization. In this study, we evaluated bone structural and mechanical properties of an Il15ra whole-body knockout mouse (Il15ra-/-) and used in vitro and bioinformatic analyses to understand the role IL15/IL15RA signaling on osteoblast function. We show that lack of IL15RA decreased bone mineralization in vivo and in isolated primary osteogenic cultures, suggesting a cell-autonomous effect. Il15ra-/- osteogenic cultures also had reduced Rankl/Opg mRNA ratio, indicating defective osteoblast/osteoclast coupling. We analyzed the transcriptome of primary pre-osteoblasts from normal and Il15ra-/- mice and identified 1150 genes that were differentially expressed at a FDR of 5%. Of these, 844 transcripts were upregulated and 306 were downregulated in Il15ra-/- cells. The largest functional clusters, highlighted using DAVID analysis, were related to metabolism, immune response, bone mineralization and morphogenesis. The transcriptome analysis was validated by qPCR of some of the most significant hits. Using bioinformatic approaches, we identified candidate genes, including Cd200 and Enpp1, that could contribute to the reduced mineralization. Silencing Il15ra using shRNA in the calvarial osteoblast MC3T3-E1 cell line decreased ENPP1 activity. Taken together, these data support that IL15RA plays a cell-autonomous role in osteoblast function and bone mineralization.
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Affiliation(s)
- Emanuele Loro
- Department of Physiology and Pennsylvania Muscle Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Girish Ramaswamy
- Department of Orthopedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Abhishek Chandra
- Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA; Division of Geriatric Medicine and Gerontology, Mayo Clinic, Rochester, MN, USA
| | - Wei-Ju Tseng
- Department of Orthopedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Manoj K Mishra
- Department of Physiology and Pennsylvania Muscle Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Eileen M Shore
- Department of Orthopedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
| | - Tejvir S Khurana
- Department of Physiology and Pennsylvania Muscle Institute, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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10
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Abstract
Muscle is primarily known for its mechanical roles in locomotion, maintenance of posture, and regulation of cardiac and respiratory function. There are numerous medical conditions that adversely affect muscle, myopathies that disrupt muscle development, regeneration and protein turnover to detrimental effect. Skeletal muscle is also a vital secretory organ that regulates thermogenesis, inflammatory signaling and directs context specific global metabolic changes in energy substrate preference on a daily basis. Myopathies differ in the causative factors that drive them but share common features including severe reduction in quality of life and significantly increased mortality all due irrefutably to the loss of muscle mass. Thus far clinically viable approaches for preserving muscle proteins and stimulating new muscle growth without unwanted side effects or limited efficacy has been elusive. Over the last few decades, evidence has emerged through in vitro and in vivo studies that suggest the nuclear receptors REV-ERB and ROR might modulate pathways involved in myogenesis and mitochondrial biogenesis. Hinting that REV-ERB and ROR might be targeted to treat myopathies. However there is still a need for substantial investigation into the roles of these nuclear receptors in in vivo rodent models of degenerative muscle diseases and acute injury. Although exciting, REV-ERB and ROR have somewhat confounding roles in muscle physiology and therefore more studies utilizing in vivo models of skeletal muscle myopathies are needed. In this review we highlight the molecular forces driving some of the major degenerative muscular diseases and showcase two promising molecular targets that may have the potential to treat myopathies: ROR and REV-ERB.
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Affiliation(s)
- Ryan D Welch
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, MO, United States of America
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11
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Pérez-López A, McKendry J, Martin-Rincon M, Morales-Alamo D, Pérez-Köhler B, Valadés D, Buján J, Calbet JAL, Breen L. Skeletal muscle IL-15/IL-15Rα and myofibrillar protein synthesis after resistance exercise. Scand J Med Sci Sports 2017; 28:116-125. [PMID: 28449327 DOI: 10.1111/sms.12901] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/21/2017] [Indexed: 01/20/2023]
Abstract
In vitro and in vivo studies described the myokine IL-15 and its receptor IL-15Rα as anabolic/anti-atrophy agents, however, the protein expression of IL-15Rα has not been measured in human skeletal muscle and data regarding IL-15 expression remain inconclusive. The purpose of the study was to determine serum and skeletal muscle IL-15 and IL-15Rα responses to resistance exercise session and to analyze their association with myofibrillar protein synthesis (MPS). Fourteen participants performed a bilateral leg resistance exercise composed of four sets of leg press and four sets of knee extension at 75% 1RM to task failure. Muscle biopsies were obtained at rest, 0, 4 and 24 hours post-exercise and blood samples at rest, mid-exercise, 0, 0.3, 1, 2, 4 and 24 hours post-exercise. Serum IL-15 was increased by ~5.3-fold immediately post-exercise, while serum IL-15Rα decreased ~75% over 1 hour post-exercise (P<.001). Skeletal muscle IL-15Rα mRNA and protein expression were increased at 4 hours post-exercise by ~2-fold (P<.001) and ~1.3-fold above rest (P=.020), respectively. At 24 hours post-exercise, IL-15 (P=.003) and IL-15Rα mRNAs increased by ~2-fold (P=.002). Myofibrillar fractional synthetic rate between 0-4 hours was associated with IL-15Rα mRNA at rest (r=.662, P=.019), 4 hours (r=.612, P=.029), and 24 hours post-exercise (r=.627, P=.029). Finally, the muscle IL-15Rα protein up-regulation was related to Leg press 1RM (r=.688, P=.003) and total weight lifted (r=.628, P=.009). In conclusion, IL-15/IL-15Rα signaling pathway is activated in skeletal muscle in response to a session of resistance exercise.
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Affiliation(s)
- A Pérez-López
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Madrid, Spain.,Biomedical Research Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain.,Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Madrid, Spain.,School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK.,Department of Physical Education, Faculty of Physical Education, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - J McKendry
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK.,MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, UK
| | - M Martin-Rincon
- Department of Physical Education, Faculty of Physical Education, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.,Research Institute of Biomedical and Health Sciences (IUIBS), Las Palmas de Gran Canaria, Spain
| | - D Morales-Alamo
- Department of Physical Education, Faculty of Physical Education, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.,Research Institute of Biomedical and Health Sciences (IUIBS), Las Palmas de Gran Canaria, Spain
| | - B Pérez-Köhler
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Madrid, Spain.,Biomedical Research Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - D Valadés
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Alcalá, Madrid, Spain
| | - J Buján
- Department of Medicine and Medical Specialities, Faculty of Medicine and Health Sciences, University of Alcalá, Madrid, Spain.,Biomedical Research Networking Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - J A L Calbet
- Department of Physical Education, Faculty of Physical Education, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain.,Research Institute of Biomedical and Health Sciences (IUIBS), Las Palmas de Gran Canaria, Spain
| | - L Breen
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK.,MRC-ARUK Centre for Musculoskeletal Ageing Research, University of Birmingham, Birmingham, UK
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12
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Nguyen L, Bohlen J, Stricker J, Chahal I, Zhang H, Pistilli EE. Hippocampus-specific deficiency of IL-15Rα contributes to greater anxiety-like behaviors in mice. Metab Brain Dis 2017; 32:297-302. [PMID: 27837366 DOI: 10.1007/s11011-016-9930-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Accepted: 11/08/2016] [Indexed: 02/06/2023]
Abstract
A hippocampus-specific IL15RαKO mouse (hipIl15ra fl/fl /Cre+) was generated to test the hypothesis that the targeted deletion of interleukin-15 receptor alpha (IL-15Rα) in the hippocampus contributes to altered behavior, including greater levels of anxiety and ambulatory activity. Using Cre-loxP, exons 2 and 3 of the IL-15Rα gene were excised within the hippocampus, while normal expression was maintained within the rest of the brain. In the open field test (OFT), hipIl15ra fl/fl /Cre+ spent a greater amount of time in the periphery and less time in the central portions of the chamber, and there was also a noticeable trend for decreased rearing activity; these behaviors are consistent with greater levels of anxiety-like behavior in these mice. However, there were no differences in the overall locomotor counts in the OFT when comparing hipIl15ra fl/fl /Cre+ mice to their littermate controls. These data implicate IL-15-related signaling within the hippocampus has a role in anxiety-like behavior.
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Affiliation(s)
- Linda Nguyen
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University School of Medicine, Morgantown, WV, 26506, USA
| | - Joseph Bohlen
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, 26506, USA
| | - Janelle Stricker
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, 26506, USA
| | - Ikttesh Chahal
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, 26506, USA
| | - Hanting Zhang
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, West Virginia University School of Medicine, Morgantown, WV, 26506, USA
| | - Emidio E Pistilli
- Division of Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, 26506, USA.
- West Virginia University Cancer Institute, West Virginia University, Morgantown, WV, 26506, USA.
- West Virginia Clinical and Translational Sciences Institute, West Virginia University School of Medicine, Morgantown, WV, 26506, USA.
- Division of Exercise Physiology, Department of Human Performance and Applied Exercise Physiology, West Virginia University School of Medicine, Morgantown, WV, 26506-9227, USA.
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13
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Anderson BG, Quinn LS. Free IL-15 Is More Abundant Than IL-15 Complexed With Soluble IL-15 Receptor-α in Murine Serum: Implications for the Mechanism of IL-15 Secretion. Endocrinology 2016; 157:1315-20. [PMID: 26812159 DOI: 10.1210/en.2015-1746] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
IL-15 is a cytokine that is part of the innate immune system, as well as a proposed myokine released from skeletal muscle during physical exercise that mediates many of the positive physiological effects of exercise. Many of the immune functions of IL-15 are mediated by juxtacrine signaling via externalized IL-15 bound to membrane-associated IL-15 receptor-α (IL-15Rα). Serum and plasma samples also contain measurable concentrations of IL-15, believed to arise from proteolytic cleavage of membrane-associated IL-15/IL-15Rα complexes to generate soluble IL-15/IL-15Rα species. Here, we validate commercial assays that can distinguish the free form of IL-15 and IL-15/IL-15Rα complexes. These assays showed that most (86%) IL-15 in mouse serum resides in the free state, with a minor proportion (14%) residing in complex with IL-15Rα. Given the much shorter half-life of free IL-15 compared with IL-15/IL-15Rα complexes, these findings cast doubt on the currently accepted model for IL-15 secretion from cleavage of membrane-bound IL-15/IL-15Rα and suggest that IL-15 is released as a free molecule by an unknown mechanism.
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Affiliation(s)
- Barbara G Anderson
- Geriatric Research, Education, and Clinical Center (B.G.A., L.S.Q.), and Research Service (L.S.Q.), Veteran's Administration Puget Sound Health Care System, Seattle, Washington 98108; and Division of Gerontology and Geriatric Medicine (B.G.A., L.S.Q.), Department of Medicine, University of Washington, Seattle, Washington 98195
| | - LeBris S Quinn
- Geriatric Research, Education, and Clinical Center (B.G.A., L.S.Q.), and Research Service (L.S.Q.), Veteran's Administration Puget Sound Health Care System, Seattle, Washington 98108; and Division of Gerontology and Geriatric Medicine (B.G.A., L.S.Q.), Department of Medicine, University of Washington, Seattle, Washington 98195
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14
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Ahima RS, Park HK. Connecting Myokines and Metabolism. Endocrinol Metab (Seoul) 2015; 30:235-45. [PMID: 26248861 PMCID: PMC4595346 DOI: 10.3803/enm.2015.30.3.235] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 06/22/2015] [Accepted: 06/29/2015] [Indexed: 12/20/2022] Open
Abstract
Skeletal muscle is the largest organ of the body in non-obese individuals and is now considered to be an endocrine organ. Hormones (myokines) secreted by skeletal muscle mediate communications between muscle and liver, adipose tissue, brain, and other organs. Myokines affect muscle mass and myofiber switching, and have profound effects on glucose and lipid metabolism and inflammation, thus contributing to energy homeostasis and the pathogenesis of obesity, diabetes, and other diseases. In this review, we summarize recent findings on the biology of myokines and provide an assessment of their potential as therapeutic targets.
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Affiliation(s)
- Rexford S Ahima
- Division of Endocrinology, Diabetes and Metabolism, and the Institute for Diabetes, Obesity and Metabolism, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA.
| | - Hyeong Kyu Park
- Department of Internal Medicine, Soonchunhyang University College of Medicine, Seoul, Korea
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15
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Loro E, Seifert EL, Moffat C, Romero F, Mishra MK, Sun Z, Krajacic P, Anokye-Danso F, Summer RS, Ahima RS, Khurana TS. IL-15Rα is a determinant of muscle fuel utilization, and its loss protects against obesity. Am J Physiol Regul Integr Comp Physiol 2015; 309:R835-44. [PMID: 26269523 DOI: 10.1152/ajpregu.00505.2014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 08/12/2015] [Indexed: 12/19/2022]
Abstract
IL-15Rα is the widely expressed primary binding partner for IL-15. Because of the wide distribution in nonlymphoid tissues like skeletal muscle, adipose, or liver, IL-15/IL-15Rα take part in physiological and metabolic processes not directly related to immunity. In fast muscle, lack of IL-15Rα promotes an oxidative switch, with increased mitochondrial biogenesis and fatigue resistance. These effects are predicted to reproduce some of the benefits of exercise and, therefore, improve energy homeostasis. However, the direct effects of IL-15Rα on metabolism and obesity are currently unknown. We report that mice lacking IL-15Rα (IL-15Rα(-/-)) are resistant to diet-induced obesity (DIO). High-fat diet-fed IL-15Rα(-/-) mice have less body and liver fat accumulation than controls. The leaner phenotype is associated with increased energy expenditure and enhanced fatty acid oxidation by muscle mitochondria. Despite being protected against DIO, IL-15Rα(-/-) are hyperglycemic and insulin-resistant. These findings identify novel roles for IL-15Rα in metabolism and obesity.
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Affiliation(s)
- Emanuele Loro
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Physiology and Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Erin L Seifert
- Department of Pathology, Anatomy, and Cell Biology and MitoCare Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Cynthia Moffat
- Department of Pathology, Anatomy, and Cell Biology and MitoCare Center, Thomas Jefferson University, Philadelphia, Pennsylvania
| | - Freddy Romero
- Department of Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania; and
| | - Manoj K Mishra
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Physiology and Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania
| | - Zheng Sun
- Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Philadelphia, Pennsylvania
| | - Predrag Krajacic
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Physiology and Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania; West Virginia School of Osteopathic Medicine, Lewisburg, West Virginia; and
| | - Frederick Anokye-Danso
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Philadelphia, Pennsylvania
| | - Ross S Summer
- Department of Translational Medicine, Thomas Jefferson University, Philadelphia, Pennsylvania; and
| | - Rexford S Ahima
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Medicine, Division of Endocrinology, Diabetes and Metabolism, Philadelphia, Pennsylvania
| | - Tejvir S Khurana
- Perelman School of Medicine at the University of Pennsylvania, Philadelphia, Pennsylvania; Department of Physiology and Pennsylvania Muscle Institute, University of Pennsylvania, Philadelphia, Pennsylvania;
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16
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Interleukin-15 directly stimulates pro-oxidative gene expression in skeletal muscle in-vitro via a mechanism that requires interleukin-15 receptor alpha. Biochem Biophys Res Commun 2015; 458:614-619. [DOI: 10.1016/j.bbrc.2015.02.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 02/04/2015] [Indexed: 01/10/2023]
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