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Nakanishi R, Hashimoto N, Takuwa M, Xing J, Uemura M, un Nisa B, Tanaka M, Hirabayashi T, Tanaka M, Fujino H. High Concentrations of Nucleotides Prevent Capillary Regression during Hindlimb Unloading by Inhibiting Oxidative Stress and Enhancing Mitochondrial Metabolism of Soleus Muscles in Rats. Acta Histochem Cytochem 2023; 56:95-104. [PMID: 38318105 PMCID: PMC10838627 DOI: 10.1267/ahc.23-00029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 10/09/2023] [Indexed: 02/07/2024] Open
Abstract
Prolonged inactivity in skeletal muscles decreases muscle capillary development because of an imbalance between pro- and antiangiogenic signals, mitochondrial metabolism disorders, and increased oxidative stress. Nucleotides have been shown to exert a dose-dependent effect on disuse-induced muscle atrophy. However, the dose-dependent effect on capillary regression in disused muscles remains unclear. Therefore, this study investigated the dose-dependent effect of nucleotides on capillary regression due to disuse. For this purpose, Wistar rats were divided into five groups as follows: control rats fed nucleotide-free diets (CON), hindlimb-unloaded rats fed nucleotide-free diets (HU), and hindlimb-unloaded rats fed 1.0%, 2.5%, and 5.0% nucleotide diets, (HU + 1.0% NT), (HU + 2.5% NT), and (HU + 5.0% NT), respectively. Unloading increased reactive oxygen species (ROS) production and decreased mitochondrial enzyme activity, thereby decreasing the number of muscle capillaries. In contrast, 5.0% nucleotide-containing diet prevented increases in ROS production and reductions in the expression levels of NAMPT, PGC-1α, and CPT-1b proteins. Moreover, 5.0% nucleotide-containing diet prevented mitochondrial enzyme activity (such as citrate synthase and beta-hydroxy acyl-CoA dehydrogenase activity) via NAMPT or following PGC-1α upregulation, thereby preventing capillary regression. Therefore, 5.0% nucleotide-containing diet is likely to prevent capillary regression by decreasing oxidative stress and increasing mitochondrial metabolism.
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Affiliation(s)
- Ryosuke Nakanishi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
- Department of Physical Therapy, Kobe International University, 9–1–6, Koyocho-naka, Higashinada-ku, Kobe, Hyogo 658–0032, Japan
| | - Nagisa Hashimoto
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
| | - Miho Takuwa
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
| | - Jihao Xing
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
| | - Mikiko Uemura
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
- Department of Physical Therapy, Kansai University of Welfare Sciences, 3–11–1, Asahigaoka, Kashihara, Osaka, 582–0026, Japan
| | - Badur un Nisa
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
| | - Masayuki Tanaka
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
- Department of Physical Therapy, Okayama Healthcare Professional University, 3-2-18, Daiku Kita-ku, Okayama, Okayama, 700-0913, Japan
| | - Takumi Hirabayashi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
| | - Minoru Tanaka
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
- Department of Rehabilitation, Osaka Health Science University, 1-9-27, Tenma Kita-ku, Osaka, 530-0043, Japan
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7–10–2, Tomogaoka, Suma-ku, Kobe, Hyogo, 654–0142, Japan
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Nakanishi R, Tanaka M, Nisa BU, Shimizu S, Hirabayashi T, Tanaka M, Maeshige N, Roy RR, Fujino H. Alternating current electromagnetic field exposure lessens intramyocellular lipid accumulation due to high-fat feeding via enhanced lipid metabolism in mice. PLoS One 2023; 18:e0289086. [PMID: 38011220 PMCID: PMC10681264 DOI: 10.1371/journal.pone.0289086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Accepted: 07/11/2023] [Indexed: 11/29/2023] Open
Abstract
Long-term high-fat feeding results in intramyocellular lipid accumulation, leading to insulin resistance. Intramyocellular lipid accumulation is related to an energy imbalance between excess fat intake and fatty acid consumption. Alternating current electromagnetic field exposure has been shown to enhance mitochondrial metabolism in the liver and sperm. Therefore, we hypothesized that alternating current electromagnetic field exposure would ameliorate high-fat diet-induced intramyocellular lipid accumulation via activation of fatty acid consumption. C57BL/6J mice were either fed a normal diet (ND), a normal diet and exposed to an alternating current electromagnetic field (ND+EMF), a high-fat diet (HFD), or a high-fat diet and exposed to an alternating current electromagnetic field (HFD+EMF). Electromagnetic field exposure was administered 8 hrs/day for 16 weeks using an alternating current electromagnetic field device (max.180 mT, Hokoen, Utatsu, Japan). Tibialis anterior muscles were collected for measurement of intramyocellular lipids, AMPK phosphorylation, FAT/CD-36, and carnitine palmitoyltransferase (CPT)-1b protein expression levels. Intramyocellular lipid levels were lower in the HFD + EMF than in the HFD group. The levels of AMPK phosphorylation, FAT/CD-36, and CPT-1b protein levels were higher in the HFD + EMF than in the HFD group. These results indicate that alternating current electromagnetic field exposure decreases intramyocellular lipid accumulation via increased fat consumption.
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Affiliation(s)
- Ryosuke Nakanishi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
- Department of Physical Therapy, Kobe International University, Kobe, Japan
| | - Masayuki Tanaka
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
- Department of Physical Therapy, Okayama Healthcare Professional University, Okayama, Japan
| | - Badur un Nisa
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Sayaka Shimizu
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Takumi Hirabayashi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Minoru Tanaka
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
- Department of Rehabilitation Science, Osaka Health Science University, Osaka, Japan
| | - Noriaki Maeshige
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Roland R. Roy
- Brain Research Institute and Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA, United States of America
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
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