Silicone oil-induced ocular hypertension in mouse models glaucomatous neurodegeneration and neuroprotection
Hannah C. Webber,
Peter H. Tang,
Vinit B. Mahajan,
Jeffrey Louis Goldberg,
Posted 13 Feb 2019
bioRxiv DOI: 10.1101/547661
Posted 13 Feb 2019
Understanding the molecular mechanism of glaucoma and development of neuroprotectants are significantly hindered by the lack of a reliable animal model that accurately recapitulates human glaucoma. Here we sought to develop a mouse model for the secondary glaucoma that is often observed in humans after silicone oil (SO) blocks the pupil or migrates into the anterior chamber following vitreoretinal surgery. We observed similar intraocular pressure (IOP) elevation after intracameral injection into mouse eyes of SO, and removing the SO allows the IOP level to quickly return to normal. This simple, inducible and reversible mouse model showed dynamic changes of visual function that correlate with progressive RGC loss and axon degeneration. We also used a single AAV vector for the first time to co-express miRNA-based shRNA and a neuroprotective transgene and further validated this model as an effective in vivo means to test neuroprotective therapies by targeting neuronal endoplasmic reticulum stress.
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