The involvement of sirtuins during optic nerve injury of rats

Pei Meng, Jiacong Wei, Jingying Wang, Jiajian Liang, Ye Zhi, Yiqun Geng*

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    1 Citation (Scopus)

    Abstract

    Sirtuins, comprised of seven members, protect cells from injury, possibly through different roles. In this study, we used two young rat optic nerve injury models to analyze the changes in Sirts 1-7 at different time points to better understand the role of sirtuins during optic nerve injury. Twelve-week-old adult male F344 rats (total n=42) were divided randomly into two groups. One group was subjected to optic nerve cut (ON-cut) and the other group was subjected to a peripheral nerve-optic nerve graft (PN-ON graft) on the left eye. At 1 and 3 days and 1, 2, and 4 weeks, rats were euthanized and retinas of both eyes were removed. Total RNA was extracted and first-strand cDNA was synthesized. Sirts 1-7 and housekeeping -actin quantitative real-time PCR were performed. The quantitative real-time PCR profile showed that sirtuin mRNAs in both groups increased following optic nerve injury with and without peripheral nerve grafting. Sirt1 mRNA increased rapidly, reaching its peak at 3 days after surgery. Sirts 2-7 showed an increasing trend and remained high through 4 weeks after surgery. Sirts 4 and 6 were the only Sirts that increased in number in the PN-graft group at 4 weeks after surgery, where neuronal survival should be higher. Our data indicate that Sirt1 and Sirts 2-7 may play different or complementary roles in optic nerve injury and that Sirts 4 and 6 may play a greater role than the remaining Sirts in axon regeneration.

    Original languageEnglish
    Pages (from-to)361-365
    Number of pages5
    JournalNeuroreport
    Volume27
    Issue number5
    DOIs
    Publication statusPublished - 23-Mar-2016

    Keywords

    • neuroprotection
    • optic nerve injury
    • rat
    • sirtuins
    • RETINAL GANGLION-CELLS
    • AXONAL REGENERATION
    • TRANSECTION
    • PROMOTES
    • SURVIVAL
    • STRESS
    • DEGENERATION
    • MACROPHAGES
    • METABOLISM
    • REGROWTH

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