期刊
EXPERIMENTAL NEUROLOGY
卷 367, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.expneurol.2023.114467
关键词
Traumatic brain injury; Human bone marrow mesenchymal stem cell; Extracellular vesicles; Brain delivery; Cis p-tau
This study investigated the therapeutic effects of clonal mesenchymal stem cell-derived extracellular vesicles (cMSC-EVs) in traumatic brain injury (TBI) treatment. The results showed that cMSC-EVs efficiently improved cognitive function in TBI animal models, reduced cis p-tau and cleaved caspase3 protein expression, and increased p-PI3K expression. Moreover, cMSC-EVs were able to effectively load an anti-cis p-tau antibody, suggesting their potential use in antibody delivery for passive immunotherapy.
Objective: Traumatic brain injury (TBI) is a major risk factor for disabilities globally with no effective treatment thus far. Recently, homogenous population of clonal mesenchymal stem cells (cMSC) and their derived extra-cellular vesicles (cMSC-EVs) have been proposed as a promising TBI treatment strategy. We herein investigated possible therapeutic effect of cMSC-EVs in TBI treatment and the underlying mechanisms considering cis p-tau as an early hallmark of TBI.Methods: We examined the EVs morphology, size distribution, marker expression, and uptake. Moreover, the EVs neuroprotective effects were studied in both in-vitro and in-vivo model. We also examined the anti-cis p-tau antibody-loading characteristics of the EVs. We treated TBI mouse model with EVs; prepared from cMSC-conditioned media. TBI mice were given cMSC-EVs intravenously and their cognitive functions were analyzed two months of the treatment. We employed immunoblot analysis to study the underlying molecular mechanisms.Results: We observed a profound cMSC-EVs uptake by primary cultured neurons. We found a remarkable neu-roprotective effect of cMSC-EVs upon nutritional deprivation stress. Furthermore, cMSC-EVs were effectively loaded with an anti-cis p-tau antibody. There was a significant improvement in cognitive function in TBI animal models treated with cMSC-EVs compared to the saline-treated group. There was a decreased cis p-tau and cleaved caspase3 as well as increased p-PI3K in all treated animals.Conclusions: The results revealed that cMSC-EVs efficiently improved animal behaviors after TBI by reducing cistauosis and apoptosis. Moreover, the EVs can be employed as an effective strategy for antibody delivery during passive immunotherapy.
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