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Ma X, Yamaguchi A, Maeshige N, Tanida K, Uemura M, Lu F, Kondo H, Fujino H. Facilitatory effect of low-pulse repetition frequency ultrasound on release of extracellular vesicles from cultured myotubes. J Med Ultrason (2001) 2024:10.1007/s10396-024-01429-9. [PMID: 38575766 DOI: 10.1007/s10396-024-01429-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 02/11/2024] [Indexed: 04/06/2024]
Abstract
PURPOSE Extracellular vesicles (EVs) serve as carriers of intracellular factors with therapeutic effects, including tissue regeneration and attenuation of inflammatory responses. The majority of EVs in vivo are derived from skeletal muscle, which is reported to have anti-inflammatory effects. While high-intensity pulsed ultrasound (US) irradiation has been shown to promote EV secretion from myotubes, the impact of pulse repetition frequency, a US parameter affecting pulse length, on EV release remains unclear. This study aimed to investigate the impact of pulse repetition frequency of US on the release of EVs from myotubes. METHODS C2C12 myoblasts were used in this study. After differentiation into C2C12 myotubes, US was performed for 5 min at an intensity of 3.0 W/cm2, duty cycle of 20%, acoustic frequency of 1 MHz, and different pulse repetition frequencies (100 Hz, 10 Hz, or 1 Hz). After 12 h, EVs and cells were collected for subsequent analyses. RESULTS US did not cause a reduction in cell viability across all US groups compared to the control. The concentration of EVs was significantly higher in all US groups compared to the control group. In particular, the highest increase was observed in the 1-Hz group on EV concentration as well as intracellular Ca2+ level. CONCLUSION This study investigated the effect of three different pulse repetition frequencies of US on the release of EVs from cultured myotubes. It is concluded that a low-pulse repetition frequency of 1 Hz is the most effective for enhancing EV release from cultured myotubes with pulsed ultrasound.
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Affiliation(s)
- Xiaoqi Ma
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 10-2 Tomogaoka 7-chome, Suma-ku, Kobe, Hyogo, 654-0142, Japan
| | - Atomu Yamaguchi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 10-2 Tomogaoka 7-chome, Suma-ku, Kobe, Hyogo, 654-0142, Japan
| | - Noriaki Maeshige
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 10-2 Tomogaoka 7-chome, Suma-ku, Kobe, Hyogo, 654-0142, Japan.
| | - Kento Tanida
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 10-2 Tomogaoka 7-chome, Suma-ku, Kobe, Hyogo, 654-0142, Japan
| | - Mikiko Uemura
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 10-2 Tomogaoka 7-chome, Suma-ku, Kobe, Hyogo, 654-0142, Japan
| | - Fuwen Lu
- Shanghai Yangzhi Rehabilitation Hospital (Shanghai Sunshine Rehabilitation Center), Tongji University School of Medicine, 2209 Guangxing Rd., Songjiang District, Shanghai, 201619, China
| | - Hiroyo Kondo
- Faculty of Health and Nutrition, Shubun University, 72 Momo Higashiyashiki, Yamato-cho, Ichinomiya, Aichi, 491-0932, Japan
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 10-2 Tomogaoka 7-chome, Suma-ku, Kobe, Hyogo, 654-0142, Japan
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Yamaguchi A, Maeshige N, Noguchi H, Yan J, Ma X, Uemura M, Su D, Kondo H, Sarosiek K, Fujino H. Pulsed ultrasound promotes secretion of anti-inflammatory extracellular vesicles from skeletal myotubes via elevation of intracellular calcium level. eLife 2023; 12:RP89512. [PMID: 38054662 PMCID: PMC10699803 DOI: 10.7554/elife.89512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023] Open
Abstract
The regulation of inflammatory responses is an important intervention in biological function and macrophages play an essential role during inflammation. Skeletal muscle is the largest organ in the human body and releases various factors which mediate anti-inflammatory/immune modulatory effects. Recently, the roles of extracellular vesicles (EVs) from a large variety of cells are reported. In particular, EVs released from skeletal muscle are attracting attention due to their therapeutic effects on dysfunctional organs and tissues. Also, ultrasound (US) promotes release of EVs from skeletal muscle. In this study, we investigated the output parameters and mechanisms of US-induced EV release enhancement and the potential of US-treated skeletal muscle-derived EVs in the regulation of inflammatory responses in macrophages. High-intensity US (3.0 W/cm2) irradiation increased EV secretion from C2C12 murine muscle cells via elevating intracellular Ca2+ level without negative effects. Moreover, US-induced EVs suppressed expression levels of pro-inflammatory factors in macrophages. miRNA sequencing analysis revealed that miR-206-3p and miR-378a-3p were especially abundant in skeletal myotube-derived EVs. In this study we demonstrated that high-intensity US promotes the release of anti-inflammatory EVs from skeletal myotubes and exert anti-inflammatory effects on macrophages.
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Affiliation(s)
- Atomu Yamaguchi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Noriaki Maeshige
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Hikari Noguchi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Jiawei Yan
- School of Life Sciences and Technology, ShanghaiTech University, Shanghai, China
| | - Xiaoqi Ma
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Mikiko Uemura
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Dongming Su
- Department of Pathology, Nanjing Medical University, Nanjing, China
| | - Hiroyo Kondo
- Department of Health and Nutrition , Shubun University, Ichinomiya, Japan
| | - Kristopher Sarosiek
- John B. Little Center for Radiation Sciences, Harvard University T.H. Chan School of Public Health, Boston, United States
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, 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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Yamaguchi A, Maeshige N, Ma X, Uemura M, Noguchi H, Matsuda M, Nishimura Y, Hasunuma T, Kondo H, Fujino H. Pulsed-Ultrasound Irradiation Induces the Production of Itaconate and Attenuates Inflammatory Responses in Macrophages. J Inflamm Res 2022; 15:2387-2395. [PMID: 35444446 PMCID: PMC9013924 DOI: 10.2147/jir.s361609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Accepted: 04/07/2022] [Indexed: 12/30/2022] Open
Abstract
Background Itaconate is a key metabolite in the innate immune system and exerts strong anti-inflammatory effects in macrophages. For the production of itaconate in macrophages, immune-responsive gene 1 (IRG1) is an imperative enzyme, and activating the IRG1-itaconate pathway is reported to alleviate inflammatory diseases by upregulating nuclear factor-erythroid 2-related factor 2 (NRF2). However, there are very few reports on strategies to increase itaconate production. Ultrasound therapy is a widely used intervention for anti-inflammatory and soft-tissue regeneration purposes. Here we show the effect of ultrasound irradiation on the production of itaconate in macrophages. Methods Murine bone marrow-derived macrophages (BMDMs) were exposed to pulsed ultrasound (3.0 W/cm2) for 5 minutes. Three hours after irradiation, the intracellular levels of metabolites and mRNA expression levels of Irg1 and Nrf2 were measured using CE/MS and qPCR, respectively. To evaluate macrophage inflammation status, 3 h after irradiation, the cells were stimulated with 100 ng/mL lipopolysaccharide (LPS) for 1.5 h and the mRNA expression levels of pro-inflammatory factors (Il-1β, Il-6, and Tnf-α) were measured. Student’s t-test, one-way ANOVA and Tukey’s multiple comparison test were used for statistical processing, and the significance level was set to less than 5%. Results Ultrasound irradiation significantly increased the intracellular itaconate level and the expression levels of Irg1 and Nrf2 in BMDMs. Upregulation of Il-1β, Il-6, and Tnf-α by LPS was significantly suppressed in BMDMs treated with ultrasound. Ultrasound irradiation did not affect cell viability and apoptosis. Conclusion Ultrasound irradiation induces the production of itaconate by upregulating Irg1 expression and attenuates inflammatory responses in macrophages via Nrf2. These results suggest that ultrasound is a potentially useful method to increase itaconate production in macrophages.
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Affiliation(s)
- Atomu Yamaguchi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Noriaki Maeshige
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
- Correspondence: Noriaki Maeshige, Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, 7-10-2 Tomogaoka, Kobe, 654-0142, Hyogo, Japan, Tel +81 78 796 4582, Email
| | - Xiaoqi Ma
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Mikiko Uemura
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Hikari Noguchi
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
| | - Mami Matsuda
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Yuya Nishimura
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
| | - Tomohisa Hasunuma
- Graduate School of Science, Technology and Innovation, Kobe University, Kobe, Japan
- Engineering Biology Research Center, Kobe University, Kobe, Japan
| | - Hiroyo Kondo
- Department of Food Science and Nutrition, Nagoya Women’s University, Nagoya, Japan
| | - Hidemi Fujino
- Department of Rehabilitation Science, Kobe University Graduate School of Health Sciences, Kobe, Japan
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