July 2018
Volume 59, Issue 9
Open Access
ARVO Annual Meeting Abstract  |   July 2018
Synergistic neuroprotective effect of rasagiline and idebenone against retinal ischemia-reperfusion injury via the Lin28-let-7-Dicer pathway
Author Affiliations & Notes
  • Huiping Yuan
    Department of Ophthalmology, Harbin Medical University, Harbin,, HEILONGJIANG, China
  • Dawei Lei
    Department of Ophthalmology, Harbin Medical University, Harbin,, HEILONGJIANG, China
  • Zhengbo Shao
    Department of Ophthalmology, Harbin Medical University, Harbin,, HEILONGJIANG, China
  • Xinrong Zhou
    Department of Ophthalmology, Harbin Medical University, Harbin,, HEILONGJIANG, China
  • Footnotes
    Commercial Relationships   Huiping Yuan, None; Dawei Lei, None; Zhengbo Shao, None; Xinrong Zhou, None
  • Footnotes
    Support  NSFC 81470634
Investigative Ophthalmology & Visual Science July 2018, Vol.59, 6123. doi:
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      Huiping Yuan, Dawei Lei, Zhengbo Shao, Xinrong Zhou; Synergistic neuroprotective effect of rasagiline and idebenone against retinal ischemia-reperfusion injury via the Lin28-let-7-Dicer pathway. Invest. Ophthalmol. Vis. Sci. 2018;59(9):6123.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : Retinal ischemia-reperfusion (RIR) injury causes neuronal degeneration and initiates various optic nerve diseases. This study investigated the synergistic neuroprotective mechanisms of rasagiline and idebenone against RIR injury.

Methods : Acute ocular hypertension was induced as the RIR model. A combination of rasagiline and idebenone was administered intraperitoneally immediately after establishment of the RIR. Apoptosis of retinal ganglion cells was evaluated by TUNEL assay. Western blot and qPCR were performed for mechanistic analyses.

Results : Treatment with the combination of the two drugs resulted in a significant restoration of retinal thickness and retinal ganglion cells (P<0.001, n= 6/group). Apoptosis of cells in ganglion cell layers was also ameliorated (P<0.001, n= 6/group), suggesting that the effect of the two drugs was synergistic and the expression of brain-derived neurotrophic factor increased. Furthermore, rasagiline and idebenone induced the expression of Lin28B and Lin28A (P<0.001, n= 6/group), respectively, which resulted in a reduced expression of microRNAs in the let-7 family and an increased protein output of Dicer (P<0.001, n= 6/group). The data obtained from gene overexpression and knockdown experiments indicated that let-7 and Dicer were necessary for the synergistic neuroprotective effect of the two drugs.

Conclusions : Our findings suggested that combination therapy with rasagiline and idebenone produced a synergistic effect that ameliorated RIR injury. In addition, the combined treatment provided neuroprotection via enhancement of the selective regulation of let-7 by Lin28A/B. These findings implied that a treatment with the combination of rasagiline and idebenone is a feasible treatment option for optic nerve diseases.

This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.

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