1
|
Williams AS, Crown SB, Lyons SP, Koves TR, Wilson RJ, Johnson JM, Slentz DH, Kelly DP, Grimsrud PA, Zhang GF, Muoio DM. Ketone flux through BDH1 supports metabolic remodeling of skeletal and cardiac muscles in response to intermittent time-restricted feeding. Cell Metab 2024; 36:422-437.e8. [PMID: 38325337 PMCID: PMC10961007 DOI: 10.1016/j.cmet.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/20/2023] [Accepted: 01/10/2024] [Indexed: 02/09/2024]
Abstract
Time-restricted feeding (TRF) has gained attention as a dietary regimen that promotes metabolic health. This study questioned if the health benefits of an intermittent TRF (iTRF) schedule require ketone flux specifically in skeletal and cardiac muscles. Notably, we found that the ketolytic enzyme beta-hydroxybutyrate dehydrogenase 1 (BDH1) is uniquely enriched in isolated mitochondria derived from heart and red/oxidative skeletal muscles, which also have high capacity for fatty acid oxidation (FAO). Using mice with BDH1 deficiency in striated muscles, we discover that this enzyme optimizes FAO efficiency and exercise tolerance during acute fasting. Additionally, iTRF leads to robust molecular remodeling of muscle tissues, and muscle BDH1 flux does indeed play an essential role in conferring the full adaptive benefits of this regimen, including increased lean mass, mitochondrial hormesis, and metabolic rerouting of pyruvate. In sum, ketone flux enhances mitochondrial bioenergetics and supports iTRF-induced remodeling of skeletal muscle and heart.
Collapse
Affiliation(s)
- Ashley S Williams
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA
| | - Scott B Crown
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA
| | - Scott P Lyons
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA
| | - Timothy R Koves
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA; Department of Medicine, Division of Geriatrics, Duke University Medical Center, Durham, NC 27710, USA
| | - Rebecca J Wilson
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA
| | - Jordan M Johnson
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA
| | - Dorothy H Slentz
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA
| | - Daniel P Kelly
- Cardiovascular Institute and Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Paul A Grimsrud
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA; Department of Medicine, Division of Endocrinology, Metabolism, and Nutrition, Duke University Medical Center, Durham, NC 27710, USA
| | - Guo-Fang Zhang
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA; Department of Medicine, Division of Endocrinology, Metabolism, and Nutrition, Duke University Medical Center, Durham, NC 27710, USA
| | - Deborah M Muoio
- Duke Molecular Physiology Institute and Sarah W. Stedman Nutrition and Metabolism Center, Duke University Medical Center, Durham, NC 27701, USA; Department of Medicine, Division of Endocrinology, Metabolism, and Nutrition, Duke University Medical Center, Durham, NC 27710, USA; Department of Pharmacology and Cancer Biology, Duke University Medical Center, Durham, NC 27710, USA.
| |
Collapse
|
2
|
Effects of long-term treatment with dietary theobromine on rat skeletal muscles. Mol Biol Rep 2022; 49:3965-3973. [DOI: 10.1007/s11033-022-07248-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 02/09/2022] [Indexed: 10/19/2022]
|
3
|
Kitaoka Y, Watanabe D, Nonaka Y, Yagishita K, Kano Y, Hoshino D. Effects of clenbuterol administration on mitochondrial morphology and its regulatory proteins in rat skeletal muscle. Physiol Rep 2019; 7:e14266. [PMID: 31599131 PMCID: PMC6785658 DOI: 10.14814/phy2.14266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/18/2019] [Accepted: 09/20/2019] [Indexed: 12/14/2022] Open
Abstract
Clenbuterol induces a slow-to-fast fiber type transition in skeletal muscle. This muscle fiber transition decreased mitochondrial oxidative capacity and respiratory function. We hypothesized that the clenbuterol-mediated reduction in oxidative capacity is associated with the alteration in mitochondrial morphology. To verify this hypothesis, we examined whether clenbuterol alters mitochondrial morphology and mitochondrial regulatory proteins in rat skeletal muscle. Clenbuterol was administered to rats via drinking water (30 mg/L) for 3 weeks. Myosin heavy chain (MHC) isoform composition, mitochondrial morphology, and fusion and fission regulatory protein levels in deep region and superficial region in tibialis anterior (TA) muscles were assessed. Clenbuterol induced the fiber type transition from slow to fast in both the regions of TA. The levels of optic atrophy protein 1, mitofusin 2, and mitochondrial fission 1, but not of dynamin-related protein 1, significantly decreased in deep and superficial muscles after clenbuterol administration (P < 0.01). Also, observation using the transmission electron microscopy showed a decrease in mitochondrial volume (P < 0.05) and an increase in proportion of continuous or interacting mitochondria across Z-lines (P < 0.05). We showed that clenbuterol administration induces a transition in the muscle fiber type composition toward fast phenotype and causes alterations in mitochondrial morphology with a concomitant decrease in mitochondrial fusion and fission regulatory protein levels. These mitochondrial morphological alterations may influence deleterious effects on skeletal muscle metabolism.
Collapse
Affiliation(s)
- Yu Kitaoka
- Department of Human SciencesKanagawa UniversityYokohamaJapan
| | - Daiki Watanabe
- Graduate School of Integrated Arts and SciencesHiroshima UniversityHiroshimaJapan
| | - Yudai Nonaka
- Department of Engineering ScienceThe University of Electro‐communicationsChofuTokyoJapan
| | - Kazuyoshi Yagishita
- Clinical Center for Sports Medicine and Sports DentistryHyperbaric Medical Center/Sports Medicine Clinical CenterMedical Hospital of Tokyo Medical and Dental UniversityBunkyo‐kuTokyoJapan
| | - Yutaka Kano
- Department of Engineering ScienceThe University of Electro‐communicationsChofuTokyoJapan
| | - Daisuke Hoshino
- Department of Engineering ScienceThe University of Electro‐communicationsChofuTokyoJapan
| |
Collapse
|
4
|
Brown DM, Williams H, Ryan KJP, Wilson TL, Daniel ZCTR, Mareko MHD, Emes RD, Harris DW, Jones S, Wattis JAD, Dryden IL, Hodgman TC, Brameld JM, Parr T. Mitochondrial phosphoenolpyruvate carboxykinase (PEPCK-M) and serine biosynthetic pathway genes are co-ordinately increased during anabolic agent-induced skeletal muscle growth. Sci Rep 2016; 6:28693. [PMID: 27350173 PMCID: PMC4923900 DOI: 10.1038/srep28693] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 06/08/2016] [Indexed: 02/04/2023] Open
Abstract
We aimed to identify novel molecular mechanisms for muscle growth during administration of anabolic agents. Growing pigs (Duroc/(Landrace/Large-White)) were administered Ractopamine (a beta-adrenergic agonist; BA; 20 ppm in feed) or Reporcin (recombinant growth hormone; GH; 10 mg/48 hours injected) and compared to a control cohort (feed only; no injections) over a 27-day time course (1, 3, 7, 13 or 27-days). Longissimus Dorsi muscle gene expression was analyzed using Agilent porcine transcriptome microarrays and clusters of genes displaying similar expression profiles were identified using a modified maSigPro clustering algorithm. Anabolic agents increased carcass (p = 0.002) and muscle weights (Vastus Lateralis: p < 0.001; Semitendinosus: p = 0.075). Skeletal muscle mRNA expression of serine/one-carbon/glycine biosynthesis pathway genes (Phgdh, Psat1 and Psph) and the gluconeogenic enzyme, phosphoenolpyruvate carboxykinase-M (Pck2/PEPCK-M), increased during treatment with BA, and to a lesser extent GH (p < 0.001, treatment x time interaction). Treatment with BA, but not GH, caused a 2-fold increase in phosphoglycerate dehydrogenase (PHGDH) protein expression at days 3 (p < 0.05) and 7 (p < 0.01), and a 2-fold increase in PEPCK-M protein expression at day 7 (p < 0.01). BA treated pigs exhibit a profound increase in expression of PHGDH and PEPCK-M in skeletal muscle, implicating a role for biosynthetic metabolic pathways in muscle growth.
Collapse
Affiliation(s)
- D M Brown
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - H Williams
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK.,School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - K J P Ryan
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - T L Wilson
- VMRD Global Therapeutics Research, Zoetis, Kalamazoo, MI, 49007, USA
| | - Z C T R Daniel
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - M H D Mareko
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - R D Emes
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - D W Harris
- VMRD Global Therapeutics Research, Zoetis, Kalamazoo, MI, 49007, USA
| | - S Jones
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - J A D Wattis
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - I L Dryden
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - T C Hodgman
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - J M Brameld
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| | - T Parr
- School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK
| |
Collapse
|
5
|
Sato S, Shirato K, Mitsuhashi R, Inoue D, Kizaki T, Ohno H, Tachiyashiki K, Imaizumi K. Intracellular β2-adrenergic receptor signaling specificity in mouse skeletal muscle in response to single-dose β2-agonist clenbuterol treatment and acute exercise. J Physiol Sci 2013; 63:211-8. [PMID: 23508836 PMCID: PMC3633781 DOI: 10.1007/s12576-013-0253-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 02/24/2013] [Indexed: 01/05/2023]
Abstract
The aim of this study was to clarify the intracellular β2-adrenergic receptor signaling specificity in mouse slow-twitch soleus and fast-twitch tibialis anterior (TA) muscles, resulting from single-dose β2-agonist clenbuterol treatment and acute exercise. At 1, 4, and 24 h after single-dose treatment with clenbuterol or after acute running exercise, the soleus and TA muscles were isolated and subjected to analysis. The phosphorylation of p38 mitogen-activated protein kinase (MAPK) increased after single-dose clenbuterol treatment and acute exercise in the soleus muscle but not in the TA muscle. Although there was no change in the phosphorylation of Akt after acute exercise in either muscle, phosphorylation of Akt in the soleus muscle increased after single-dose clenbuterol treatment, whereas that in the TA muscle remained unchanged. These results suggest that p38 MAPK and Akt pathways play a functional role in the adaptation to clenbuterol treatment and exercise, particularly in slow-twitch muscles.
Collapse
Affiliation(s)
- Shogo Sato
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Ken Shirato
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Ryosuke Mitsuhashi
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Daisuke Inoue
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Takako Kizaki
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University, School of Medicine, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611 Japan
| | - Hideki Ohno
- Department of Molecular Predictive Medicine and Sport Science, Kyorin University, School of Medicine, 6-20-2 Shinkawa, Mitaka, Tokyo 181-8611 Japan
| | - Kaoru Tachiyashiki
- Department of Natural and Living Sciences, Graduate School of Education, Joetsu University of Education, 1 Yamayashiki, Joetsu, Niigata 943-8512 Japan
| | - Kazuhiko Imaizumi
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
- Global COE Doctoral Program, Graduate School of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| |
Collapse
|
6
|
Hoshino D, Yoshida Y, Holloway GP, Lally J, Hatta H, Bonen A. Clenbuterol, a β2-adrenergic agonist, reciprocally alters PGC-1 alpha and RIP140 and reduces fatty acid and pyruvate oxidation in rat skeletal muscle. Am J Physiol Regul Integr Comp Physiol 2012; 302:R373-84. [DOI: 10.1152/ajpregu.00183.2011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Clenbuterol, a β2-adrenergic agonist, reduces mitochondrial content and enzyme activities in skeletal muscle, but the mechanism involved has yet to be identified. We examined whether clenbuterol-induced changes in the muscles' metabolic profile and the intrinsic capacity of mitochondria to oxidize substrates are associated with reductions in the nuclear receptor coactivator PGC-1 alpha and/or an increase in the nuclear corepressor RIP140. In rats, clenbuterol was provided in the drinking water (30 mg/l). In 3 wk, this increased body (8%) and muscle weights (12–17%). In red (R) and white (W) muscles, clenbuterol induced reductions in mitochondrial content (citrate synthase: R, 27%; W, 52%; cytochrome- c oxidase: R, 24%; W, 34%), proteins involved in fatty acid transport (fatty acid translocase/CD36: R, 36%; W, 35%) and oxidation [β-hydroxyacyl CoA dehydrogenase (β-HAD): R, 33%; W, 62%], glucose transport (GLUT4: R, 8%; W, 13%), lactate transport monocarboxylate transporter (MCT1: R, 61%; W, 37%), and pyruvate oxidation (PDHE1α, R, 18%; W, 12%). Concurrently, only red muscle lactate dehydrogenase activity (25%) and MCT4 (31%) were increased. Palmitate oxidation was reduced in subsarcolemmal (SS) (R, 30%; W, 52%) and intermyofibrillar (IMF) mitochondria (R, 17%; W, 44%) along with reductions in β-HAD activity (SS: R, 17%; W, 51%; IMF: R, 20%; W, 57%). Pyruvate oxidation was only reduced in SS mitochondria (R, 20%; W, 28%), but this was not attributable solely to PDHE1α, which was reduced in both SS (R, 21%; W, 20%) and IMF mitochondria (R, 15%; W, 43%). These extensive metabolic changes induced by clenbuterol were associated with reductions in PGC-1α (R, 37%; W, 32%) and increases in RIP140 (R, 23%; W, 21%). This is the first evidence that clenbuterol appears to exert its metabolic effects via simultaneous and reciprocal changes in the nuclear receptor coactivator PGC-1α and the nuclear corepressor RIP140.
Collapse
Affiliation(s)
- Daisuke Hoshino
- Department of Sports Sciences, The University of Tokyo, Tokyo, Japan; and
| | - Yuko Yoshida
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Graham P. Holloway
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - James Lally
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| | - Hideo Hatta
- Department of Sports Sciences, The University of Tokyo, Tokyo, Japan; and
| | - Arend Bonen
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
| |
Collapse
|
7
|
Sato S, Shirato K, Kizaki T, Ohno H, Tachiyashiki K, Imaizumi K. Effects of β2-agonists and exercise on β2-adrenergic receptor signaling in skeletal muscles. JOURNAL OF PHYSICAL FITNESS AND SPORTS MEDICINE 2012. [DOI: 10.7600/jpfsm.1.139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
8
|
Muscle plasticity and β₂-adrenergic receptors: adaptive responses of β₂-adrenergic receptor expression to muscle hypertrophy and atrophy. J Biomed Biotechnol 2011; 2011:729598. [PMID: 22190857 PMCID: PMC3228688 DOI: 10.1155/2011/729598] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Accepted: 08/23/2011] [Indexed: 02/04/2023] Open
Abstract
We discuss the functional roles of β2-adrenergic receptors in skeletal
muscle hypertrophy and atrophy as well as
the adaptive responses of β2-adrenergic receptor expression to anabolic and catabolic conditions. β2-Adrenergic receptor stimulation using
anabolic drugs increases muscle mass by promoting
muscle protein synthesis and/or attenuating
protein degradation. These effects are prevented
by the downregulation of the receptor. Endurance
training improves oxidative performance partly
by increasing β2-adrenergic receptor density in
exercise-recruited slow-twitch muscles. However,
excessive stimulation of β2-adrenergic receptors negates their beneficial effects. Although the preventive effects of β2-adrenergic receptor stimulation on
atrophy induced by muscle disuse and catabolic
hormones or drugs are observed, these catabolic
conditions decrease β2-adrenergic receptor expression in
slow-twitch muscles. These findings present
evidence against the use of β2-adrenergic agonists in therapy for muscle wasting and weakness. Thus, β2-adrenergic receptors in the skeletal
muscles play an important physiological role in
the regulation of protein and energy balance.
Collapse
|
9
|
Sato S, Nomura S, Kawano F, Tanihata J, Tachiyashiki K, Imaizumi K. Adaptive effects of the beta2-agonist clenbuterol on expression of beta2-adrenoceptor mRNA in rat fast-twitch fiber-rich muscles. J Physiol Sci 2010; 60:119-27. [PMID: 20033361 PMCID: PMC10716947 DOI: 10.1007/s12576-009-0075-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Accepted: 11/23/2009] [Indexed: 10/20/2022]
Abstract
Administration of the beta(2)-agonist clenbuterol has been shown to reduce the expression of beta(2)-adrenoceptor (AR) mRNA in fast-twitch fiber-rich (extensor digitorum longus, EDL) muscle without changing that in slow-twitch fiber-rich (soleus, SOL) muscle in rats. However, the regulatory mechanism for muscle fiber type-dependent down-regulation of the expression of beta(2)-AR mRNA induced by clenbuterol is still unclear. Therefore, mRNA expression of transcriptional and post-transcriptional regulatory factors for beta(2)-AR mRNA levels in fast-twitch fiber-rich (EDL and plantaris, PLA) and slow-twitch fiber-rich (SOL) muscles in clenbuterol-administered (1.0 mg/kg body weight/day for 10 days, subcutaneous) rats was studied by real-time reverse transcription-polymerase chain reaction. Administration of clenbuterol significantly reduced expression of beta(2)-AR mRNA in EDL and PLA muscles without changing that in SOL muscle. Administration of clenbuterol also significantly reduced the mRNA expression of transcriptional regulatory factor (glucocorticoid receptor) and mRNA stabilizing factor (Hu antigen R) in EDL and PLA muscles without changing those in SOL muscle. These results suggest that muscle fiber type-dependent effects of clenbuterol on expression of beta(2)-AR mRNA are closely related to the down-regulation of mRNA expression of transcriptional and post-transcriptional regulatory factors for beta(2)-AR mRNA levels.
Collapse
MESH Headings
- Adaptation, Physiological/drug effects
- Adaptation, Physiological/physiology
- Adrenergic beta-Agonists/pharmacology
- Animals
- Cells, Cultured
- Clenbuterol/pharmacology
- Gene Expression Regulation/drug effects
- Gene Expression Regulation/physiology
- Male
- Muscle Fibers, Fast-Twitch/drug effects
- Muscle Fibers, Fast-Twitch/physiology
- RNA, Messenger/metabolism
- Rats
- Rats, Sprague-Dawley
- Receptors, Adrenergic, beta-3/genetics
- Receptors, Adrenergic, beta-3/metabolism
Collapse
Affiliation(s)
- Shogo Sato
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Sachiko Nomura
- Graduate School of Medicine, Osaka University, 1-17 Machikaneyama, Toyonaka, Osaka 560-0043 Japan
| | - Fuuun Kawano
- Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo, 153-8902 Japan
| | - Jun Tanihata
- Laboratory of Rehabilitation Biomedical Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Kaoru Tachiyashiki
- Department of Living and Health Sciences, Graduate School of Joetsu University of Education, 1 Yamayashiki, Joetsu, Niigata 943-8512 Japan
| | - Kazuhiko Imaizumi
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| |
Collapse
|
10
|
Kawano F, Tanihata J, Sato S, Nomura S, Shiraishi A, Tachiyashiki K, Imaizumi K. Effects of dexamethasone on the expression of beta(1)-, beta (2)- and beta (3)-adrenoceptor mRNAs in skeletal and left ventricle muscles in rats. J Physiol Sci 2009; 59:383-90. [PMID: 19585216 PMCID: PMC10717288 DOI: 10.1007/s12576-009-0046-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2008] [Accepted: 06/02/2009] [Indexed: 10/20/2022]
Abstract
Glucocorticoids are known to increase the density and mRNA levels of beta-adrenoceptors (beta-AR) via the glucocorticoid receptor (GR) in many tissues. However, the effects of these changes in the skeletal and cardiac muscles remain relatively unknown. We have investigated the effects of dexamethasone on the expression of the beta(1)-, beta(2)-, and beta(3)-AR mRNAs and GR mRNA in fast-twitch fiber-rich extensor digitorum longus (EDL), slow-twitch fiber-rich soleus (SOL), and left ventricle (LV) muscles by real-time quantitative RT-PCR. Male rats were divided into a dexamethasone group and control group. The weight, RNA concentration, and total RNA content of EDL muscle were 0.76-, 0.85-, and 0.65-fold lower, respectively, in the dexamethasone group than in the control group. The weight, RNA concentration, and total RNA content of SOL muscle were 0.92-, 0.87-, and 0.81-fold lower, respectively, in the dexamethasone group than in the control group; these differences were significant. However, the weight/body weight and total RNA content/body weight of LV muscle were 1.38- and 1.39-fold higher, respectively, in the dexamethasone group than in the control group, respectively; these differences were also significant. Dexamethasone significantly decreased GR mRNA expression in EDL muscle without changing the expression of the beta(1)-, beta(2)-, and beta(3)-AR mRNAs. However, dexamethasone significantly decreased the expressions of beta(2)-AR and GR mRNAs in SOL muscle and significantly increased beta(1)-AR mRNA expression in LV muscle-without changing GR mRNA expression. These results suggest that the effects of dexamethasone on the expression of beta(1)- and beta(2)-AR mRNAs and muscle mass depend on the muscle contractile and/or constructive types.
Collapse
MESH Headings
- Animals
- Body Weight/physiology
- Dexamethasone/pharmacology
- Dose-Response Relationship, Drug
- Drinking/physiology
- Eating/physiology
- Glucocorticoids/pharmacology
- Heart Ventricles/metabolism
- Male
- Muscle, Skeletal/metabolism
- Myocardium/metabolism
- RNA, Messenger/metabolism
- Rats
- Rats, Sprague-Dawley
- Receptors, Adrenergic, beta-1/drug effects
- Receptors, Adrenergic, beta-1/metabolism
- Receptors, Adrenergic, beta-2/drug effects
- Receptors, Adrenergic, beta-2/metabolism
- Receptors, Adrenergic, beta-3/drug effects
- Receptors, Adrenergic, beta-3/metabolism
Collapse
Affiliation(s)
- Fuuun Kawano
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Jun Tanihata
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Shogo Sato
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
| | - Sachiko Nomura
- Consolidated Research Institute for Advanced Science and Medical Care, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku Tokyo, 162-0041 Japan
| | - Akira Shiraishi
- Faculty of Budo and Sport Studies, Tenri University, 80 Tainosho-cho, Tenri Nara, 632-0071 Japan
| | - Kaoru Tachiyashiki
- Department of Natural and Health Sciences, Joetsu University of Education, 1 Yamayashiki, Joetsu Niigata, 943-8512 Japan
| | - Kazuhiko Imaizumi
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192 Japan
- Consolidated Research Institute for Advanced Science and Medical Care, Waseda University, 513 Wasedatsurumaki-cho, Shinjuku Tokyo, 162-0041 Japan
| |
Collapse
|
11
|
Maybaum S, Kamalakannan G, Murthy S. Cardiac Recovery During Mechanical Assist Device Support. Semin Thorac Cardiovasc Surg 2008; 20:234-46. [DOI: 10.1053/j.semtcvs.2008.08.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/21/2008] [Indexed: 11/11/2022]
|
12
|
Sato S, Nomura S, Kawano F, Tanihata J, Tachiyashiki K, Imaizumi K. Effects of the beta2-agonist clenbuterol on beta1- and beta2-adrenoceptor mRNA expressions of rat skeletal and left ventricle muscles. J Pharmacol Sci 2008; 107:393-400. [PMID: 18678986 DOI: 10.1254/jphs.08097fp] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
The beta2-agonist clenbuterol [4-amino-alpha(t-butyl-amino)methyl-3,5-dichlorobenzyl alcohol] is used as a non-steroidal anabolic drug for sports doping. The effects of clenbuterol on the transcriptional process and mRNA stability of beta-adrenoceptor (beta-AR) in skeletal and cardiac muscles are still unknown. Therefore, we investigated the effects of clenbuterol on beta1- and beta2-AR mRNA expressions of fast-twitch fiber-rich extensor digitorum longus (EDL), slow-twitch fiber-rich soleus (SOL), and left ventricle (LV) muscles by real-time RT-PCR. Adult male Sprague Dawley rats were divided into the clenbuterol-administered group and control group. The administration (dose = 1.0 mg/kg body weight/day, s.c.) of clenbuterol was maintained for 10 days. The administration of clenbuterol significantly increased the weight, RNA concentration, and total RNA content of EDL muscle. No effects of clenbuterol on those of SOL and LV muscles, however, were observed. The administration of clenbuterol significantly decreased beta1-AR mRNA expression of LV muscle. Furthermore, the administration of clenbuterol significantly decreased beta2-AR mRNA expression of EDL and LV muscles. No effect of clenbuterol on beta2-AR mRNA expression of SOL muscle, however, was observed. These results suggest that the effects of clenbuterol on beta1- and beta2-AR mRNA expressions and muscle hypertrophy depend on muscle fiber types.
Collapse
Affiliation(s)
- Shogo Sato
- Laboratory of Physiological Sciences, Faculty of Human Sciences, Waseda University, Tokorozawa, Saitama, Japan
| | | | | | | | | | | |
Collapse
|
13
|
Kim SH, Lee GM. Down-regulation of lactate dehydrogenase-A by siRNAs for reduced lactic acid formation of Chinese hamster ovary cells producing thrombopoietin. Appl Microbiol Biotechnol 2006; 74:152-9. [PMID: 17086415 DOI: 10.1007/s00253-006-0654-5] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Revised: 08/23/2006] [Accepted: 09/04/2006] [Indexed: 11/30/2022]
Abstract
Lactate, one of the major waste products in mammalian cell culture, can inhibit cell growth and affect cellular metabolism at high concentrations. To reduce lactate formation, lactate dehydrogenase-A (LDH-A), an enzyme catalyzing the conversion of glucose-derived pyruvate to lactate, was down-regulated by an expression vector of small interfering RNAs (siRNA) in recombinant Chinese hamster ovary (rCHO) cells producing human thrombopoietin (hTPO). Three clones expressing low levels of LDH-A, determined by reverse transcription-PCR and an enzyme activity test, were established in addition to a negative control cell line. LDH-A activities in the three clones were decreased by 75-89%, compared with that of the control CHO cell line, demonstrating that the effect of siRNA is more significant than that of other traditional methods such as homologous recombination (30%) and antisense mRNA (29%). The specific glucose consumption rates of the three clones were reduced to 54-87% when compared to the control cell line. Similarly, the specific lactate production rates were reduced to 45-79% of the control cell line level. In addition, reduction of LDH-A did not impair either cell proliferation or hTPO productivity. Taken together, these results show that the lactate formation rate in rCHO cell culture can be efficiently reduced through the down-regulation of LDH via siRNA.
Collapse
Affiliation(s)
- Sung Hyun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 373-1 Guseong-Dong, Yuseong-Gu, Daejeon 305-701, South Korea
| | | |
Collapse
|
14
|
Hashimoto T, Kambara N, Nohara R, Yazawa M, Taguchi S. Expression of MHC-beta and MCT1 in cardiac muscle after exercise training in myocardial-infarcted rats. J Appl Physiol (1985) 2004; 97:843-51. [PMID: 15133008 DOI: 10.1152/japplphysiol.01193.2003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
To evaluate the hypothesis that increasing the potential for glycolytic metabolism would benefit the functioning of infarcted myocardium, we investigated whether mild exercise training would increase the activities of oxidative enzymes, expression of carbohydrate-related transport proteins (monocarboxylate transporter MCT1 and glucose transporter GLUT4), and myosin heavy chain (MHC) isoforms. Myocardial infarction (MI) was produced by occluding the proximal left coronary artery in rat hearts for 30 min. After the rats performed 6 wk of run training on a treadmill, the wall of the left ventricle was dissected and divided into the anterior wall (AW; infarcted region) and posterior wall (PW; noninfarcted region). MI impaired citrate synthase and 3-hydroxyacyl-CoA dehydrogenase activities in the AW (P < 0.01) but not in the noninfarcted PW. No differences in the expression of MCT1 were found in either tissues of AW and PW after MI, whereas exercise training significantly increased the MCT1 expression in all conditions, except AW in the MI rats. Exercise training resulted in an increased expression of GLUT4 protein in the AW in the sham rats and in the PW in the MI rats. The relative amount of MHC-beta was significantly increased in the AW and PW in MI rats compared with sham rats. However, exercise training resulted in a significant increase of MHC-alpha expression in both AW and PW in both sham and MI rats (P < 0.01). These findings suggest that mild exercise training enhanced the potential for glycolytic metabolism and ATPase activity of the myocardium, even in the MI rats, ensuring a beneficial role in the remodeling of the heart.
Collapse
Affiliation(s)
- Takeshi Hashimoto
- Department of Environmental Physiology, Graduate School of Human and Environmental Studies, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | | | | | | | | |
Collapse
|
15
|
Bricout VA, Serrurier BD, Bigard AX. Clenbuterol treatment affects myosin heavy chain isoforms and MyoD content similarly in intact and regenerated soleus muscles. ACTA ACUST UNITED AC 2004; 180:271-80. [PMID: 14962009 DOI: 10.1046/j.0001-6772.2003.01246.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS Pharmacological treatment with the beta2-adrenoceptor agonist clenbuterol is known to induce a slow-to-fast fibre type and myosin heavy chain (MHC) isoform transition in intact muscle. This study examined the sensitivity of regenerated soleus muscle to 4 weeks of clenbuterol treatment (2 mg kg-1 day-1). METHODS Female Wistar rats were divided into two groups: vehicle treated (n = 8) and clenbuterol treated (n = 8). The clenbuterol effects on MHC and MyoD expression were examined in soleus muscles either intact, or previously degenerated by venom of the Notechis scutatus scutatus snake. RESULTS Post-treatment body weights and skeletal muscle weights were not affected by clenbuterol treatment. Muscle protein concentration was higher, and body fat lower in clenbuterol-treated rats than in vehicle-treated animals (P < 0.05). Polyacrylamide gel electrophoresis of soleus myofibrillar protein indicated a clenbuterol-induced decrease in the relative percentage of type I MHC with a concomitant increase in type IIa MHC (31%, P < 0.001). No degeneration effect was observed after 28 days of recovery on the MHC isoform content, and regenerated soleus muscles exhibited the same phenotypical profile as intact soleus muscles, whether or not they were treated with clenbuterol. In intact and in regenerated soleus muscles, MyoD protein levels were significantly increased by clenbuterol treatment (90 and 77%, respectively, P < 0.001). CONCLUSION These results show that regenerated soleus muscles, comprising a homogeneous population of fibres deriving from satellite cells, have a similar response to clenbuterol as intact muscle arising from at least two discrete populations of myotubes; it is suggested that the activity of signalling pathways involved in the effects of clenbuterol on MHC transitions is not related to the developmental history of myofibres.
Collapse
Affiliation(s)
- V-A Bricout
- Department of Human Factors, Centre de recherches du service de santé des armées, La Tronche Cedex, France
| | | | | |
Collapse
|
16
|
|
17
|
McClelland GB, Brooks GA. Changes in MCT 1, MCT 4, and LDH expression are tissue specific in rats after long-term hypobaric hypoxia. J Appl Physiol (1985) 2002; 92:1573-84. [PMID: 11896024 DOI: 10.1152/japplphysiol.01069.2001] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Little is known about the effect of chronic hypobaric hypoxia on the enzymes and transporters involved in lactate metabolism. We looked at the protein expression of monocarboxylate transporters MCT 1, MCT 2, and MCT 4, along with total lactate dehydrogenase (LDH) and LDH isozymes in skeletal muscle, cardiac muscle, and liver. Expression of these components of the lactate shuttle affects the ability to transport and oxidize lactate. We hypothesized that the expression of MCTs and LDH would increase after acclimation to high altitude (HA). The response to acclimation to HA was, however, tissue specific. In addition, the response was different in whole muscle (Mu) and mitochondria-enriched (Mi) fractions. Heart, soleus, and plantaris muscles showed the greatest response to HA. Acclimation resulted in a 34% increase in MCT 4 in heart and a decrease in MCT 1 (-47%) and MCT 4 (-47%) in plantaris Mu. In Mi fractions, the heart had an increase (+40%) and soleus a decrease (-40%) in LDH. HA also had a significant effect on the LDH isozyme composition of both the Mu and Mi fractions. Mitochondrial density was decreased in both the soleus (-17%) and plantaris (-44%) as a result of chronic hypoxia. We conclude that chronic hypoxia had a tissue-specific effect on MCTs and LDH (that form the lactate shuttle) but did not produce a consistent increase in these components in all tissues.
Collapse
Affiliation(s)
- Grant B McClelland
- Exercise Physiology Laboratory, Department of Integrative Biology, University of California, Berkeley, California 94720-3140, USA
| | | |
Collapse
|