PMID- 32629985 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200928 IS - 2076-3425 (Print) IS - 2076-3425 (Electronic) IS - 2076-3425 (Linking) VI - 10 IP - 7 DP - 2020 Jun 30 TI - Ultrasound Stimulation Increases Neurite Regeneration in Injured Dorsal Root Ganglion Neurons through Mammalian Target of Rapamycin Activation. LID - 10.3390/brainsci10070409 [doi] LID - 409 AB - Ultrasound stimulation (US) is reported to be a safe and useful technology for improving injured nerve regeneration. However, the intracellular mechanisms underlying its stimulatory effects are only partially understood. Mammalian target of rapamycin (mTOR) signaling is involved in neuronal survival and axonal outgrowth. In this study, we investigated the effect of US on regeneration of injured dorsal root ganglion (DRG) neurons and activation of the mTOR pathway. We showed that US significantly increased neurite regeneration and enhanced mTOR activation. Moreover, the expression of growth-associated protein-43 (GAP-43), a crucial factor for axonal outgrowth and regeneration in neurons, was significantly increased by US. These data suggest that US-induced neurite regeneration is mediated by upregulation of mTOR activity, which promotes the regeneration of injured DRG neurons. FAU - Han, Sungmin AU - Han S AUID- ORCID: 0000-0003-2762-668X AD - Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Korea. FAU - Park, Jinyoung AU - Park J AD - Molecular Recognition Research Center, Korea Institute of Science and Technology, Hwarangno 14-gil 5, Seongbuk-gu, Seoul 02792, Korea. FAU - Choi, Won Seok AU - Choi WS AD - Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Korea. FAU - Youn, Inchan AU - Youn I AD - Biomedical Research Institute, Korea Institute of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Korea. AD - Division of Bio-Medical Science &Technology, KIST School, Korea University of Science and Technology, 5, Hwarang-ro 14-gil, Seongbuk-gu, Seoul 02792, Korea. LA - eng GR - CAP-18-01-KIST/National Research Council of Science and Technology/ PT - Journal Article DEP - 20200630 PL - Switzerland TA - Brain Sci JT - Brain sciences JID - 101598646 PMC - PMC7407506 OTO - NOTNLM OT - dorsal root ganglion OT - mammalian target of rapamycin OT - neurite regeneration OT - ultrasound stimulation COIS- The authors declare no conflicts of interest. EDAT- 2020/07/08 06:00 MHDA- 2020/07/08 06:01 PMCR- 2020/07/01 CRDT- 2020/07/08 06:00 PHST- 2020/06/02 00:00 [received] PHST- 2020/06/23 00:00 [revised] PHST- 2020/06/30 00:00 [accepted] PHST- 2020/07/08 06:00 [entrez] PHST- 2020/07/08 06:00 [pubmed] PHST- 2020/07/08 06:01 [medline] PHST- 2020/07/01 00:00 [pmc-release] AID - brainsci10070409 [pii] AID - brainsci-10-00409 [pii] AID - 10.3390/brainsci10070409 [doi] PST - epublish SO - Brain Sci. 2020 Jun 30;10(7):409. doi: 10.3390/brainsci10070409.