Transcranial low-intensity pulsed ultrasound stimulation induces neuronal autophagy

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dc.contributor.authorHuang, X.
dc.contributor.authorNiu, L.
dc.contributor.authorMeng, L.
dc.contributor.authorLin, Z.
dc.contributor.authorZhou, W.
dc.contributor.authorLiu, X.
dc.contributor.authorHuang, J.
dc.contributor.authorAbbott, D.
dc.contributor.authorZheng, H.
dc.date.issued2021
dc.descriptionDate of publication October 5, 2020; date of current version December 23, 2020.
dc.description.abstractAutophagy, or cellular self-digestion, is an essential process for eliminating abnormal protein in mammalian cells. Accumulating evidence indicates that increased neuronal autophagy has a protective effect on neurodegenerative disorders. It has been reported that low-intensity pulsed ultrasound (LIPUS) can non-invasively modulate neural activity in the brain. Yet, the effect of LIPUS on neuronal autophagy is still unclear. The objective of this study was to examine whether LIPUS stimulation could induce neuronal autophagy. Primary neurons were treated by LIPUS with frequency of 0.68 MHz, pulse repetition frequency (PRF) of 500 Hz, spatial peak temporal-average intensities (ISPTA) of 70 and 165 mW/cm2. Then immunofluorescent analysis of LC3B was carried out for evaluating neuronal autophagy. Further, 0.5 MHz LIPUS was non-invasively delivered to the cortex and hippocampus of adult mice (n = 16) with PRF of 500 Hz and ISPTA of 235 mW/cm2. The LC3BII/LC3BI ratio and p62 (autophagic markers) were measured by western blot analysis. In in vitro study, the expression of LC3B in primary neurons was statistically improved after LIPUS stimulation was implemented for 4 hours (p < 0.01). With the increase of irradiation duration or acoustic intensity of LIPUS stimulation, the expression of LC3B in primary neurons was increased. Furthermore, transcranial LIPUS stimulation increased the LC3BII/LC3BI ratio (p < 0.05), and decreased the expression of p62 (p < 0.05) in the cortex and hippocampus. We concluded that LIPUS provides a safe and capable tool for activating neuronal autophagy in vitro and in vivo.
dc.description.statementofresponsibilityXiaowei Huang, Lili Niu, Long Meng, Zhengrong Lin, Wei Zhou, Xiufang Liu, Jiqing Huang, Derek Abbott Fellow, and Hairong Zheng
dc.identifier.citationIEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2021; 68(1):46-53
dc.identifier.doi10.1109/TUFFC.2020.3028619
dc.identifier.issn0885-3010
dc.identifier.issn1525-8955
dc.identifier.orcidAbbott, D. [0000-0002-0945-2674]
dc.identifier.urihttp://hdl.handle.net/2440/129169
dc.language.isoen
dc.publisherIEEE
dc.rights© 2020 IEEE
dc.source.urihttps://doi.org/10.1109/tuffc.2020.3028619
dc.subjectTranscranial ultrasound neuromodulation; Neuronal autophagy; Neurodegenerative disorders
dc.titleTranscranial low-intensity pulsed ultrasound stimulation induces neuronal autophagy
dc.typeJournal article
pubs.publication-statusPublished

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