Sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa
Abstract Retinitis pigmentosa (RP) is a group of blinding disorders caused by diverse mutations, including in rhodopsin (RHO). Effective therapies have yet to be discovered. The I307N Rho mouse is a light-inducible model of autosomal dominant RP. Our purpose was to describe the glial response in thi...
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2020-10-01
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doaj-f3d8f5a58325402db4213209766158902020-12-08T10:46:30ZengNature Publishing GroupScientific Reports2045-23222020-10-0110111510.1038/s41598-020-73749-ySectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosaMichael T. Massengill0Neil F. Ash1Brianna M. Young2Cristhian J. Ildefonso3Alfred S. Lewin4Department of Molecular Genetics and Microbiology, University of Florida College of MedicineDepartment of Molecular Genetics and Microbiology, University of Florida College of MedicineDepartment of Ophthalmology, University of Florida College of MedicineDepartment of Ophthalmology, University of Florida College of MedicineDepartment of Molecular Genetics and Microbiology, University of Florida College of MedicineAbstract Retinitis pigmentosa (RP) is a group of blinding disorders caused by diverse mutations, including in rhodopsin (RHO). Effective therapies have yet to be discovered. The I307N Rho mouse is a light-inducible model of autosomal dominant RP. Our purpose was to describe the glial response in this mouse model to educate future experimentation. I307N Rho mice were exposed to 20,000 lx of light for thirty minutes to induce retinal degeneration. Immunofluorescence staining of cross-sections and flat-mounts was performed to visualize the response of microglia and Müller glia. Histology was correlated with spectral-domain optical coherence tomography imaging (SD-OCT). Microglia dendrites extended between photoreceptors within two hours of induction, withdrew their dendrites between twelve hours and one day, appeared ameboid by three days, and assumed a ramified morphology by one month. Glial activation was more robust in the inferior retina and modulated across the boundary of light damage. SD-OCT hyper-reflectivity overlapped with activated microglia. Finally, microglia transiently adhered to the RPE before which RPE cells appeared dysmorphic. Our data demonstrate the spatial and temporal pattern of glial activation in the I307N Rho mouse, and correlate these patterns with SD-OCT images, assisting in interpretation of SD-OCT images in preclinical models and in human RP.https://doi.org/10.1038/s41598-020-73749-y |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Michael T. Massengill Neil F. Ash Brianna M. Young Cristhian J. Ildefonso Alfred S. Lewin |
spellingShingle |
Michael T. Massengill Neil F. Ash Brianna M. Young Cristhian J. Ildefonso Alfred S. Lewin Sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa Scientific Reports |
author_facet |
Michael T. Massengill Neil F. Ash Brianna M. Young Cristhian J. Ildefonso Alfred S. Lewin |
author_sort |
Michael T. Massengill |
title |
Sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa |
title_short |
Sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa |
title_full |
Sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa |
title_fullStr |
Sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa |
title_full_unstemmed |
Sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa |
title_sort |
sectoral activation of glia in an inducible mouse model of autosomal dominant retinitis pigmentosa |
publisher |
Nature Publishing Group |
series |
Scientific Reports |
issn |
2045-2322 |
publishDate |
2020-10-01 |
description |
Abstract Retinitis pigmentosa (RP) is a group of blinding disorders caused by diverse mutations, including in rhodopsin (RHO). Effective therapies have yet to be discovered. The I307N Rho mouse is a light-inducible model of autosomal dominant RP. Our purpose was to describe the glial response in this mouse model to educate future experimentation. I307N Rho mice were exposed to 20,000 lx of light for thirty minutes to induce retinal degeneration. Immunofluorescence staining of cross-sections and flat-mounts was performed to visualize the response of microglia and Müller glia. Histology was correlated with spectral-domain optical coherence tomography imaging (SD-OCT). Microglia dendrites extended between photoreceptors within two hours of induction, withdrew their dendrites between twelve hours and one day, appeared ameboid by three days, and assumed a ramified morphology by one month. Glial activation was more robust in the inferior retina and modulated across the boundary of light damage. SD-OCT hyper-reflectivity overlapped with activated microglia. Finally, microglia transiently adhered to the RPE before which RPE cells appeared dysmorphic. Our data demonstrate the spatial and temporal pattern of glial activation in the I307N Rho mouse, and correlate these patterns with SD-OCT images, assisting in interpretation of SD-OCT images in preclinical models and in human RP. |
url |
https://doi.org/10.1038/s41598-020-73749-y |
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