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  • Approaches to Potentiated Neuroprotective Treatment in the Rodent Model of Ischemic Optic Neuropathy
    UMB Dataset

    Authors
    Zara Mehrabian
    Yan Guo
    Neil R. Miller
    Amanda D. Henderson
    2 more author(s)...
    Description

    Nonarthritic anterior ischemic optic neuropathy (NAION) commonly causes sudden optic nerve (ON)-related vision loss. The rodent NAION model (rAION) closely resembles NAION in presentation and physiological responses. Researchers hypothesized that blocking pro-inflammatory prostaglandin (PGE2) production by inhibiting monoacylglycerol lipase or cyclooxygenase activity and co-administering PGJ2 would potentiate RGC survival following ischemic neuropathy. This study identified early rAION-associated optic nerve head (ONH) inflammatory gene expression responses and the anti-inflammatory prostaglandin PGJ2’s effects on those responses. Deep sequencing was performed on vehicle- and PGJ2-treated ONHs 3d post-rAION induction. Results were compared against responses from a retinal ischemia model. Animals were treated with PGJ2 and MAGL inhibitor KML29, or PGJ2 + COX inhibitor meloxicam. RGC survival was quantified by stereology.

    Subject
    Optic Nerve Diseases
    Timeframe
    2021
    Access Rights
    Unrestricted access

  • Biomarkers of lesion severity in a rodent model of nonarthritic anterior ischemic optic neuropathy (rNAION)
    UMB Dataset

    Authors
    Yan Guo
    Zara Mehrabian
    Mary A. Johnson
    Neil R. Miller
    3 more author(s)...
    Description

    The rodent model of nonarthritic anterior ischemic optic neuropathy (rNAION) is similar in many of its pathophysiological responses to clinical NAION. Like human NAION, there is significant variability in the severity of the lesion produced, and little is known of the parameters associated with rNAION induction severity or if pre- or early post-induction biomarkers can be identified that enable prediction of lesion severity and ultimate loss of retinal ganglion cells (RGCs). Adult male Sprague-Dawley outbred rats were evaluated for various parameters including physiological characteristics (heart rate, respiratory rate, temperature, hematocrit [Hct]), optic nerve head (ONH) appearance, pre- and post-induction mean diameter, and intravenous fluorescein and indocyanine green angiographic patterns of vascular leakage at 5 hours post-induction, performed using a spectral domain-optical coherence tomography (SD-OCT) instrument.

    Subject
    Optic Nerve Diseases
    Access Rights
    Unrestricted access

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