PMID- 28939348 OWN - NLM STAT- MEDLINE DCOM- 20181010 LR - 20181017 IS - 1876-4754 (Electronic) IS - 1876-4754 (Linking) VI - 10 IP - 6 DP - 2017 Nov-Dec TI - Transcranial ultrasound stimulation promotes brain-derived neurotrophic factor and reduces apoptosis in a mouse model of traumatic brain injury. PG - 1032-1041 LID - S1935-861X(17)30895-1 [pii] LID - 10.1016/j.brs.2017.09.003 [doi] AB - BACKGROUND: The protein expressions of brain-derived neurotrophic factor (BDNF) can be elevated by transcranial ultrasound stimulation in the rat brain. OBJECTIVE: The purpose of this study was to investigate the effects and underlying mechanisms of BDNF enhancement by low-intensity pulsed ultrasound (LIPUS) on traumatic brain injury (TBI). METHODS: Mice subjected to controlled cortical impact injury were treated with LIPUS in the injured region daily for a period of 4 days. Western blot analysis and immunohistochemistry were performed to assess the effects of LIPUS. RESULTS: The results showed that the LIPUS treatment significantly promoted the neurotrophic factors BDNF and vascular endothelial growth factor (VEGF) at day 4 after TBI. Meanwhile, LIPUS also enhanced the phosphorylation of Tropomyosin-related kinase B (TrkB), Akt, and cAMP-response element binding protein (CREB). Furthermore, treatment with LIPUS significantly decreased the level of cleaved caspase-3. The reduction of apoptotic process was inhibited by the anti-BDNF antibody. CONCLUSIONS: In short, post-injury LIPUS treatment increased BDNF protein levels and inhibited the progression of apoptosis following TBI. The neuroprotective effects of LIPUS may be associated with enhancements of the protein levels of neurotrophic factors, at least partially via the TrkB/Akt-CREB signaling pathway. CI - Copyright (c) 2017 Elsevier Inc. All rights reserved. FAU - Su, Wei-Shen AU - Su WS AD - Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan. FAU - Wu, Chun-Hu AU - Wu CH AD - Graduate Institute of Life Sciences, National Defense Medical Center, Taipei, Taiwan. FAU - Chen, Szu-Fu AU - Chen SF AD - Departments of Physiology and Biophysics, National Defense Medical Center, Taipei, Taiwan; Department of Physical Medicine and Rehabilitation, Cheng Hsin General Hospital, Taipei, Taiwan. Electronic address: szufuchen@yahoo.com.tw. FAU - Yang, Feng-Yi AU - Yang FY AD - Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei, Taiwan; Biophotonics and Molecular Imaging Research Center, National Yang-Ming University, Taipei, Taiwan. Electronic address: fyyang@ym.edu.tw. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20170907 PL - United States TA - Brain Stimul JT - Brain stimulation JID - 101465726 RN - 0 (Brain-Derived Neurotrophic Factor) SB - IM MH - Animals MH - Apoptosis/*physiology MH - Brain Injuries, Traumatic/*metabolism/therapy MH - Brain-Derived Neurotrophic Factor/*biosynthesis MH - *Disease Models, Animal MH - Male MH - Mice MH - Mice, Inbred C57BL MH - Ultrasonic Therapy/*methods MH - *Ultrasonic Waves OTO - NOTNLM OT - Apoptosis OT - BDNF OT - Neurotrophic factor OT - Traumatic brain injury OT - Ultrasound EDAT- 2017/09/25 06:00 MHDA- 2018/10/12 06:00 CRDT- 2017/09/24 06:00 PHST- 2017/03/31 00:00 [received] PHST- 2017/07/31 00:00 [revised] PHST- 2017/09/02 00:00 [accepted] PHST- 2017/09/25 06:00 [pubmed] PHST- 2018/10/12 06:00 [medline] PHST- 2017/09/24 06:00 [entrez] AID - S1935-861X(17)30895-1 [pii] AID - 10.1016/j.brs.2017.09.003 [doi] PST - ppublish SO - Brain Stimul. 2017 Nov-Dec;10(6):1032-1041. doi: 10.1016/j.brs.2017.09.003. Epub 2017 Sep 7.