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Mahmassani ZS, Reidy PT, McKenzie AI, Stubben C, Howard MT, Drummond MJ. Disuse-induced insulin resistance susceptibility coincides with a dysregulated skeletal muscle metabolic transcriptome. J Appl Physiol (1985) 2019; 126:1419-1429. [PMID: 30763167 DOI: 10.1152/japplphysiol.01093.2018] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Short-term muscle disuse is characterized by skeletal muscle insulin resistance, although this response is divergent across subjects. The mechanisms regulating inactivity-induced insulin resistance between populations that are more or less susceptible to disuse-induced insulin resistance are not known. RNA sequencing was conducted on vastus lateralis muscle biopsies from subjects before and after bed rest (n = 26) to describe the transcriptome of inactivity-induced insulin resistance. Subjects were separated into Low (n = 14) or High (n = 12) Susceptibility Groups based on the magnitude of change in insulin sensitivity after 5 days of bed rest. Both groups became insulin-resistant after bed rest, and there were no differences between groups in nonmetabolic characteristics (body mass, body mass index, fat mass, and lean mass). The High Susceptibility Group had more genes altered >1.5-fold (426 high versus 391 low) and more than twofold (73 high versus 55 low). Twenty-four genes were altered more than twofold in the High Susceptibility Group that did not change in the Low Susceptibility Group. 95 gene changes correlated with the changes in insulin sensitivity; 6 of these genes changed more than twofold in the High Susceptibility Group. Participants in the High Susceptibility Group were uniquely characterized with muscle gene responses described by a decrease in pathways responsible for lipid uptake and oxidation, decreased capacity for triglyceride export (APOB), increased lipogenesis (i.e., PFKFB3, FASN), and increased amino acid export (SLC43A1). These transcriptomic data provide a comprehensive examination of pathways and genes that may be useful biomarkers, or novel targets to offset muscle disuse-induced insulin resistance. NEW & NOTEWORTHY Short-term muscle disuse results in skeletal muscle insulin resistance through mechanisms that are not fully understood. Following a 5-day bed rest intervention, subjects were divided into High and Low Susceptibility Groups to inactivity-induced insulin resistance. This was followed by a genome-wide transcriptional analysis on muscle biopsy samples to gain insight on divergent insulin sensitivity responses. Our primary finding was that the skeletal muscle of subjects who experienced the most inactivity-induced insulin resistance (high susceptibility) was characterized by a decreased preference for lipid oxidation, increased lipogenesis, and increased amino acid export.
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Affiliation(s)
- Ziad S Mahmassani
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | - Paul T Reidy
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | - Alec I McKenzie
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
| | - Chris Stubben
- Bioinformatics Shared Resource at the Huntsman Cancer Institute , Salt Lake City, Utah
| | - Michael T Howard
- Department of Genetics, University of Utah , Salt Lake City, Utah
| | - Micah J Drummond
- Department of Physical Therapy and Athletic Training, University of Utah , Salt Lake City, Utah
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Fuxjager MJ, Lee JH, Chan TM, Bahn JH, Chew JG, Xiao X, Schlinger BA. Research Resource: Hormones, Genes, and Athleticism: Effect of Androgens on the Avian Muscular Transcriptome. Mol Endocrinol 2016; 30:254-71. [PMID: 26745669 DOI: 10.1210/me.2015-1270] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Male vertebrate social displays vary from physically simple to complex, with the latter involving exquisite motor command of the body and appendages. Studies of these displays have, in turn, provided substantial insight into neuromotor mechanisms. The neotropical golden-collared manakin (Manacus vitellinus) has been used previously as a model to investigate intricate motor skills because adult males of this species perform an acrobatic and androgen-dependent courtship display. To support this behavior, these birds express elevated levels of androgen receptors (AR) in their skeletal muscles. Here we use RNA sequencing to explore how testosterone (T) modulates the muscular transcriptome to support male manakin courtship displays. In addition, we explore how androgens influence gene expression in the muscles of the zebra finch (Taenopygia guttata), a model passerine bird with a limited courtship display and minimal muscle AR. We identify androgen-dependent, muscle-specific gene regulation in both species. In addition, we identify manakin-specific effects that are linked to muscle use during the manakin display, including androgenic regulation of genes associated with muscle fiber contractility, cellular homeostasis, and energetic efficiency. Overall, our results point to numerous genes and gene networks impacted by androgens in male birds, including some that underlie optimal muscle function necessary for performing acrobatic display routines. Manakins are excellent models to explore gene regulation promoting athletic ability.
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Affiliation(s)
- Matthew J Fuxjager
- Department of Biology (M.J.F.), Wake Forest University, Winston-Salem, North Carolina 27109; Department of Life and Nanopharmaceutical Sciences (J.-H.L.), and Department of Maxillofacial Biomedical Engineering (J.-H.L.), School of Dentistry, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Integrative Biology and Physiology (M.J.F., J.-H.L., T.-M.C., J.H.B., J.G.C., X.X., B.A.S.) and Laboratory of Neuroendocrinology (M.J.F., B.A.S.), Brain Research Institute, University of California, Los Angeles, Los Angeles, California 90095; and Smithsonian Tropical Research Institute (B.A.S.), 0843-03092 Balboa, Ancón, Panama
| | - Jae-Hyung Lee
- Department of Biology (M.J.F.), Wake Forest University, Winston-Salem, North Carolina 27109; Department of Life and Nanopharmaceutical Sciences (J.-H.L.), and Department of Maxillofacial Biomedical Engineering (J.-H.L.), School of Dentistry, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Integrative Biology and Physiology (M.J.F., J.-H.L., T.-M.C., J.H.B., J.G.C., X.X., B.A.S.) and Laboratory of Neuroendocrinology (M.J.F., B.A.S.), Brain Research Institute, University of California, Los Angeles, Los Angeles, California 90095; and Smithsonian Tropical Research Institute (B.A.S.), 0843-03092 Balboa, Ancón, Panama
| | - Tak-Ming Chan
- Department of Biology (M.J.F.), Wake Forest University, Winston-Salem, North Carolina 27109; Department of Life and Nanopharmaceutical Sciences (J.-H.L.), and Department of Maxillofacial Biomedical Engineering (J.-H.L.), School of Dentistry, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Integrative Biology and Physiology (M.J.F., J.-H.L., T.-M.C., J.H.B., J.G.C., X.X., B.A.S.) and Laboratory of Neuroendocrinology (M.J.F., B.A.S.), Brain Research Institute, University of California, Los Angeles, Los Angeles, California 90095; and Smithsonian Tropical Research Institute (B.A.S.), 0843-03092 Balboa, Ancón, Panama
| | - Jae Hoon Bahn
- Department of Biology (M.J.F.), Wake Forest University, Winston-Salem, North Carolina 27109; Department of Life and Nanopharmaceutical Sciences (J.-H.L.), and Department of Maxillofacial Biomedical Engineering (J.-H.L.), School of Dentistry, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Integrative Biology and Physiology (M.J.F., J.-H.L., T.-M.C., J.H.B., J.G.C., X.X., B.A.S.) and Laboratory of Neuroendocrinology (M.J.F., B.A.S.), Brain Research Institute, University of California, Los Angeles, Los Angeles, California 90095; and Smithsonian Tropical Research Institute (B.A.S.), 0843-03092 Balboa, Ancón, Panama
| | - Jenifer G Chew
- Department of Biology (M.J.F.), Wake Forest University, Winston-Salem, North Carolina 27109; Department of Life and Nanopharmaceutical Sciences (J.-H.L.), and Department of Maxillofacial Biomedical Engineering (J.-H.L.), School of Dentistry, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Integrative Biology and Physiology (M.J.F., J.-H.L., T.-M.C., J.H.B., J.G.C., X.X., B.A.S.) and Laboratory of Neuroendocrinology (M.J.F., B.A.S.), Brain Research Institute, University of California, Los Angeles, Los Angeles, California 90095; and Smithsonian Tropical Research Institute (B.A.S.), 0843-03092 Balboa, Ancón, Panama
| | - Xinshu Xiao
- Department of Biology (M.J.F.), Wake Forest University, Winston-Salem, North Carolina 27109; Department of Life and Nanopharmaceutical Sciences (J.-H.L.), and Department of Maxillofacial Biomedical Engineering (J.-H.L.), School of Dentistry, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Integrative Biology and Physiology (M.J.F., J.-H.L., T.-M.C., J.H.B., J.G.C., X.X., B.A.S.) and Laboratory of Neuroendocrinology (M.J.F., B.A.S.), Brain Research Institute, University of California, Los Angeles, Los Angeles, California 90095; and Smithsonian Tropical Research Institute (B.A.S.), 0843-03092 Balboa, Ancón, Panama
| | - Barney A Schlinger
- Department of Biology (M.J.F.), Wake Forest University, Winston-Salem, North Carolina 27109; Department of Life and Nanopharmaceutical Sciences (J.-H.L.), and Department of Maxillofacial Biomedical Engineering (J.-H.L.), School of Dentistry, Kyung Hee University, Dongdaemun-gu, Seoul 130-701, Republic of Korea; Department of Integrative Biology and Physiology (M.J.F., J.-H.L., T.-M.C., J.H.B., J.G.C., X.X., B.A.S.) and Laboratory of Neuroendocrinology (M.J.F., B.A.S.), Brain Research Institute, University of California, Los Angeles, Los Angeles, California 90095; and Smithsonian Tropical Research Institute (B.A.S.), 0843-03092 Balboa, Ancón, Panama
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Cho KA, Kang PB. PLIN2 inhibits insulin-induced glucose uptake in myoblasts through the activation of the NLRP3 inflammasome. Int J Mol Med 2015; 36:839-44. [PMID: 26166692 DOI: 10.3892/ijmm.2015.2276] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 06/29/2015] [Indexed: 11/05/2022] Open
Abstract
Impaired lipid metabolism and inflammatory pathways have individually been implicated in the development of insulin resistance in skeletal muscle; however, little evidence is available to date linking the two in this context. In this study, we explored a potential molecular mechanism underlying insulin resistance in myoblasts mediated by the crosstalk between lipid accumulation and inflammatory pathways. We examined the influence of perilipin 2 (PLIN2), one of the most highly expressed lipid droplet-associated proteins in skeletal muscle, on glucose uptake and on the nucleotide‑binding domain, leucine‑rich repeat containing protein 3 (NLRP3) inflammasome in vitro. PLIN2 overexpression in C2C12 cells led to an increased expression of NLRP3, caspase‑1 and interleukin (IL)‑1β, along with an impaired insulin‑induced glucose uptake. This defect was remedied by the RNAi‑mediated knockdown of NLRP3 expression. We also found that insulin receptor substrate‑1 (IRS‑1), a component of insulin signaling, was negatively regulated by NLRP3 and IL‑1β, and that IL‑1β inhibited insulin‑induced glucose uptake in myoblasts. These results suggest that PLIN2 inhibits insulin‑induced glucose uptake by activating NLRP3, caspase‑1 and IL‑1β, leading to a decreased IRS‑1 expression. This study provides in vitro evidence supporting an association between lipid metabolism and inflammatory pathways in the pathogenesis of insulin resistance in skeletal muscle, and suggests potential therapeutic targets that warrant further investigation.
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Affiliation(s)
- Kyung-Ah Cho
- Division of Pediatric Neurology, Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA
| | - Peter B Kang
- Division of Pediatric Neurology, Department of Pediatrics, University of Florida College of Medicine, Gainesville, FL 32610, USA
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