Downregulation of microRNA-100 protects apoptosis and promotes neuronal growth in retinal ganglion cells.

Abstract:

BACKGROUND:Retinal ganglion cells (RGCs) are preferentially lost in glaucoma or optic neuritis. In the present study, we investigated the protective effect of mircoRNA 100 (miR-100) against oxidative stress induced apoptosis in RGC-5 cells. RESULTS:Rat RGC-5 cells were cultured in plates and H2O2 was added to induce oxidative stress. TUNEL assay and qRT-PCR showed H2O2 induced apoptosis and up-regulated miR-100 in a dose-dependent manner in RGC-5 cells. Conversely, lentiviral-mediated miR-100 down-regulation protected H2O2 induced apoptosis, promoted neurite growth and activated AKT/ERK and TrkB pathways through phosphorylation. Luciferase assay confirmed that IGF1R was directly regulated by miR-100 in RGC-5 cells, and siRNA-mediated IGF1R knockdown activated AKT protein through phosphorylation, down-regulated miR-100, therefore exerted a protective effect on RGC-5 apoptosis. CONCLUSION:Down-regulating miR-100 is an effective method to protect H2O2 induced apoptosis in RGC-5 cells, possible associated with IGF1R regulation.

journal_name

BMC Mol Biol

journal_title

BMC molecular biology

authors

Kong N,Lu X,Li B

doi

10.1186/s12867-014-0025-1

subject

Has Abstract

pub_date

2014-11-18 00:00:00

pages

25

issn

1471-2199

pii

s12867-014-0025-1

journal_volume

15

pub_type

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