Long-term photoreceptor rescue in two rodent models of retinitis pigmentosa by adeno-associated virus delivery of Stanniocalcin-1

Gavin W. Roddy, Douglas Yasumura, Michael T. Matthes, Marcel V. Alavi, Sanford L. Boye, Robert H. Rosa, Michael P Fautsch, William W. Hauswirth, Matthew M. LaVail

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Abstract

Retinal degenerations, including age-related macular degeneration and the retinitis pigmentosa family of diseases, are among the leading causes of legal blindness in the United States. We previously found that Stanniocalcin-1 (STC-1) reduced photoreceptor loss in the S334ter-3 and Royal College of Surgeons rat models of retinal degeneration. The results were attributed in part to a reduction in oxidative stress. Herein, we tested the hypothesis that long-term delivery of STC-1 would provide therapeutic rescue in more chronic models of retinal degeneration. To achieve sustained delivery, we produced an adeno-associated virus (AAV) construct to express STC-1 (AAV-STC-1) under the control of a retinal ganglion cell targeting promoter human synapsin 1 (hSYN1). AAV-STC-1 was injected intravitreally into the P23H-1 and S334ter-4 rhodopsin transgenic rats at postnatal day 10. Tissues were collected at postnatal day 120 for confirmation of STC-1 overexpression and histologic and molecular analysis. Electroretinography (ERG) was performed in a cohort of animals at that time. Overexpression of STC-1 resulted in a significant preservation of photoreceptors as assessed by outer nuclear thickness in the P23H-1 (P < 0.05) and the S334ter-4 (P < 0.005) models compared to controls. Additionally, retinal function was significantly improved in the P23H-1 model with overexpressed STC-1 as assessed by ERG analysis (scotopic b-wave P < 0.005 and photopic b-wave P < 0.05). Microarray analysis identified common downstream gene expression changes that occurred in both models. Genes of interest based on their function were selected for validation by quantitative real-time PCR and were significantly increased in the S334ter-4 model.

Original languageEnglish (US)
Pages (from-to)175-181
Number of pages7
JournalExperimental Eye Research
Volume165
DOIs
StatePublished - Dec 1 2017

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Keywords

  • Neuroprotection
  • P23H
  • Retinal degeneration
  • Rhodopsin
  • S334ter
  • Stanniocalcin-1

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Roddy, G. W., Yasumura, D., Matthes, M. T., Alavi, M. V., Boye, S. L., Rosa, R. H., Fautsch, M. P., Hauswirth, W. W., & LaVail, M. M. (2017). Long-term photoreceptor rescue in two rodent models of retinitis pigmentosa by adeno-associated virus delivery of Stanniocalcin-1. Experimental Eye Research, 165, 175-181. https://doi.org/10.1016/j.exer.2017.09.011