Abstract：
:Transplanted neural stem cells promote neural tissue regeneration and functional recovery primarily by releasing paracrine factors. Exosomes act as important secreted paracrine molecules to deliver therapeutic agents involved in cellular functions. Here, we focused on the role of exosomes (hNSC-Exo) derived from human neural stem cells (hNSCs). We utilized the pro-inflammatory factor interferon gamma (IFN-γ) to induce the generation of altered exosomes (IFN-γ-hNSC-Exo), and compared their roles with those of hNSC-Exo and explored the potential mechanism. Importantly, IFN-γ preconditioning did not affect the secretion, but significantly altered the ability of exosomes derived from hNSCs. Moreover, IFN-γ-hNSC-Exo was functionally superior to hNSC-Exo; showed increased cell proliferation and cell survival and decreased cell apoptosis in vitro. Furthermore, IFN-γ-hNSC-Exo further exerted therapeutic effects (showed better behavioral and structural outcomes) compared to those of hNSCs-Exo in an ischemic stroke rat model. Next-generation sequencing (NGS) revealed specific exosomal miRNAs (hsa-miR-206, hsa-miR-133a-3p and hsa-miR-3656) in IFN-γ-hNSC-Exo with important roles in cell survival. Thus, our findings demonstrate that the inflammatory factor IFN-γ can regulate the functions of exosomes and highlight its role in regulating the application of neural stem cell-derived exosomes.
journal_name
J Adv Resjournal_title
Journal of advanced researchauthors
Zhang G,Zhu Z,Wang H,Yu Y,Chen W,Waqas A,Wang Y,Chen Ldoi
10.1016/j.jare.2020.05.017subject
Has Abstractpub_date
2020-05-25 00:00:00pages
435-445eissn
2090-1232issn
2090-1224pii
S2090-1232(20)30099-0journal_volume
24pub_type
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