Abstract
RAB7, a member of RAS oncogene family–like 1 (RAB7L1), is a GTPase belonging to the Rab family and acts as an upstream regulator to regulate the kinase activity of leucine-rich repeat kinase 2 (LRRK2). Although LRRK2 has been shown to aggravate secondary brain injury (SBI) after intracerebral hemorrhage (ICH), it is unknown whether RAB7L1 is also involved in this process. The purpose of the present study was to investigate the role of RAB7L1 in ICH-induced SBI in vivo. Autologous blood was injected into adult male Sprague-Dawley rats to induce an ICH model in vivo. The results showed that the protein levels of RAB7L1 increased after ICH. Overexpression of RAB7L1 induced neuronal apoptosis and damage, as demonstrated by TUNEL-positive and FJB-positive cells, and exacerbated ICH-induced learning and cognitive dysfunctions; in contrast, downregulation of RAB7L1 via RNA interference yielded comparatively opposite changes in these parameters. In summary, this study demonstrates that RAB7L1 promotes SBI after ICH and may represent a potential target for ICH therapy.
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Funding
This work was supported by the National Key R&D Program of China (No. 2018YFC1312600 and 2018YFC1312601), Project of Jiangsu Provincial Medical Innovation Team (No. CXTDA2017003), Jiangsu Provincial Medical Youth Talent (No. QNRC2016728), Suzhou Key Medical Centre (No. Szzx201501), Scientific Department of Jiangsu Province (No. BE2017656), the Natural Science Foundation of Jiangsu Province under grant (No. BK20180204 & No.BK20170363), and the Suzhou Government (LCZX201601).
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Tan, X., Wei, Y., Cao, J. et al. RAB7L1 Participates in Secondary Brain Injury Induced by Experimental Intracerebral Hemorrhage in Rats. J Mol Neurosci 71, 9–18 (2021). https://doi.org/10.1007/s12031-020-01619-3
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DOI: https://doi.org/10.1007/s12031-020-01619-3