PMID- 27942989 OWN - NLM STAT- MEDLINE DCOM- 20180216 LR - 20220410 IS - 1435-604X (Electronic) IS - 0268-8921 (Print) IS - 0268-8921 (Linking) VI - 32 IP - 9 DP - 2017 Dec TI - Efficacy of femtosecond lasers for application of acupuncture therapy. PG - 2167-2171 LID - 10.1007/s10103-016-2124-3 [doi] AB - Acupuncture treatment utilizes the stimulation of metal acupuncture needles that are manually inserted into a living body. In the last decades, laser light has been used as an alternative to needles to stimulate acupuncture points. We previously reported suppression of myostatin (Mstn) gene expression in skeletal muscle by means of femtosecond laser (FL) irradiation, after electroacupuncture, in which acupuncture needles are stimulated with a low-frequency microcurrent. The purpose of the study here was to investigate the efficacy of FL irradiation in mouse skeletal muscle with regard to protein synthesis. After irradiation of the hindlimbs, we first analyzed Mstn gene expression and Mstn protein level in the skeletal muscle. We then evaluated phosphorylation of the mammalian target of rapamycin (mTOR) and its downstream target 70-kDa ribosomal protein S6 kinase (p70S6K). The results showed that FL irradiation significantly reduced the amount of Mstn protein and enhanced the phosphorylation of p70S6K in of the mTOR/S6K signaling pathway. We suggest that FL irradiation activated the protein synthetic pathway in the skeletal muscle. In conclusion, we determined that FL irradiation can serve as an alternative for acupuncture needles and has the potential of being a new non-invasive acupuncture treatment of skeletal muscle. FAU - Ohta, Mika AU - Ohta M AD - Division of Medical Informatics and Bioinformatics, Kobe University Hospital, Kobe, 650-0017, Japan. AD - Genome Science Research Unit, Life Science Research Center, Kobe Tokiwa University, Kobe, 653-0838, Japan. FAU - Hosokawa, Yoichiroh AU - Hosokawa Y AD - Graduate School of Materials Science, Nara Institute of Science and Technology, Nara, 630-0912, Japan. FAU - Hatano, Naoya AU - Hatano N AD - The Integrated Center for Mass Spectrometry, Kobe University Graduate School of Medicine, Kobe, 650-0017, Japan. FAU - Sugano, Aki AU - Sugano A AD - Division of Medical Informatics and Bioinformatics, Kobe University Hospital, Kobe, 650-0017, Japan. AD - Genome Science Research Unit, Life Science Research Center, Kobe Tokiwa University, Kobe, 653-0838, Japan. FAU - Ito, Akihiko AU - Ito A AD - Department of Pathology, Kindai University Faculty of Medicine, Osaka, 589-8511, Japan. FAU - Takaoka, Yutaka AU - Takaoka Y AD - Division of Medical Informatics and Bioinformatics, Kobe University Hospital, Kobe, 650-0017, Japan. ytakaoka@med.kobe-u.ac.jp. AD - Genome Science Research Unit, Life Science Research Center, Kobe Tokiwa University, Kobe, 653-0838, Japan. ytakaoka@med.kobe-u.ac.jp. LA - eng PT - Journal Article DEP - 20161210 PL - England TA - Lasers Med Sci JT - Lasers in medical science JID - 8611515 RN - 0 (Mstn protein, mouse) RN - 0 (Myostatin) RN - EC 2.7.11.1 (Ribosomal Protein S6 Kinases, 70-kDa) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.1 (ribosomal protein S6 kinase, 70kD, polypeptide 2) RN - EC 2.7.3.2 (Creatine Kinase) SB - IM MH - Acupuncture Therapy/*methods MH - Animals MH - Creatine Kinase/blood MH - Gene Expression Regulation MH - *Lasers MH - Male MH - Mice, Inbred C57BL MH - Muscle, Skeletal/metabolism MH - Myostatin/genetics/metabolism MH - Phosphorylation MH - Ribosomal Protein S6 Kinases, 70-kDa/metabolism MH - Signal Transduction MH - TOR Serine-Threonine Kinases/metabolism MH - Treatment Outcome PMC - PMC5682856 OTO - NOTNLM OT - Acupuncture therapy OT - Femtosecond laser OT - Myostatin OT - Skeletal muscle OT - mTOR OT - p70S6K COIS- CONFLICT OF INTEREST: The authors declare that they have no conflict of interest. FUNDING: This work was partly supported by the Japan Society for the Promotion of Science KAKENHI (Grant Numbers 24590884 and 15K08916, both for M.O.) and a 25th Grant-in-Aid from the Nakatomi Foundation (M.O.). ETHICAL APPROVAL: This study was approved by the Committee for Safe Handling of Living Modified Organisms at Nara Institute of Science and Technology (Permission number 1132) and was carried out according to the guidelines of the committee. EDAT- 2016/12/13 06:00 MHDA- 2018/02/17 06:00 PMCR- 2016/12/10 CRDT- 2016/12/13 06:00 PHST- 2016/05/29 00:00 [received] PHST- 2016/11/30 00:00 [accepted] PHST- 2016/12/13 06:00 [pubmed] PHST- 2018/02/17 06:00 [medline] PHST- 2016/12/13 06:00 [entrez] PHST- 2016/12/10 00:00 [pmc-release] AID - 10.1007/s10103-016-2124-3 [pii] AID - 2124 [pii] AID - 10.1007/s10103-016-2124-3 [doi] PST - ppublish SO - Lasers Med Sci. 2017 Dec;32(9):2167-2171. doi: 10.1007/s10103-016-2124-3. Epub 2016 Dec 10.