circRNA Acbd6 promotes neural stem cell differentiation into cholinergic neurons via the miR-320-5p-Osbpl2 axis.

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  • Additional Information
    • Source:
      Publisher: Elsevier Inc. on behalf of American Society for Biochemistry and Molecular Biology Country of Publication: United States NLM ID: 2985121R Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1083-351X (Electronic) Linking ISSN: 00219258 NLM ISO Abbreviation: J Biol Chem Subsets: MEDLINE
    • Publication Information:
      Publication: 2021- : [New York, NY] : Elsevier Inc. on behalf of American Society for Biochemistry and Molecular Biology
      Original Publication: Baltimore, MD : American Society for Biochemistry and Molecular Biology
    • Subject Terms:
    • Abstract:
      Neural stem cells (NSCs) persist in the dentate gyrus of the hippocampus into adulthood and are essential for both neurogenesis and neural circuit integration. Exosomes have also been shown to play vital roles in regulating biological processes of receptor cells as a medium for cell-to-cell communication signaling molecules. The precise molecular mechanisms of exosome-mediated signaling, however, remain largely unknown. Here, we found that exosomes produced by denervated hippocampi following fimbria-fornix transection could promote the differentiation of hippocampal neural precursor cells into cholinergic neurons in coculture with NSCs. Furthermore, we found that 14 circular RNAs (circRNAs) were upregulated in hippocampal exosomes after fimbria-fornix transection using high-throughput RNA-Seq technology. We further characterized the function and mechanism by which the upregulated circRNA Acbd6 (acyl-CoA-binding domain-containing 6) promoted the differentiation of NSCs into cholinergic neurons using RT-quantitative PCR, Western blot, ELISA, flow cytometry, immunohistochemistry, and immunofluorescence assay. By luciferase reporter assay, we demonstrated that circAcbd6 functioned as an endogenous miR-320-5p sponge to inhibit miR-320-5p activity, resulting in increased oxysterol-binding protein-related protein 2 expression with subsequent facilitation of NSC differentiation. Taken together, our results suggest that circAcbd6 promotes differentiation of NSCs into cholinergic neurons via miR-320-5p/oxysterol-binding protein-related protein 2 axis, which contribute important insights to our understanding of how circRNAs regulate neurogenesis.
      Competing Interests: Conflict of interest The authors declare that they have no conflicts of interest with the contents of this article.
      (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)
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    • Contributed Indexing:
      Keywords: cholinergic neurons; circAcbd6; exosomes; hippocampus; neural stem cells
    • Accession Number:
      0 (MIRN320 microRNA, rat)
      0 (MicroRNAs)
      0 (RNA, Circular)
      0 (Receptors, Steroid)
      0 (oxysterol binding protein)
    • Publication Date:
      Date Created: 20220320 Date Completed: 20220426 Latest Revision: 20220716
    • Publication Date:
      20240105
    • Accession Number:
      PMC9018392
    • Accession Number:
      10.1016/j.jbc.2022.101828
    • Accession Number:
      35305988