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Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment
PURPOSE: Gasdermin D (GSDMD) is crucial in neuronal pyroptosis. GSDMD-N and GSDMD-C are two subdomains of the protein GSDMD. GSDMD-N is an executor of pyroptosis, and GSDMD-C has an inhibitory effect on pyroptotic cell death. This study evaluated the role of GSDMD in photoreceptor cell pyroptosis ca...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7425730/ https://www.ncbi.nlm.nih.gov/pubmed/32697303 http://dx.doi.org/10.1167/iovs.61.8.31 |
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author | Li, Xiaomeng Liu, Yang Sun, Mengsha Gao, Min Li, Tong Liang, Jian Zhai, Yuanqi Xu, Mengqiao She, Xiangjun Yang, Shiqi Liu, Wenjia Luo, Xueting Sun, Xiaodong |
author_facet | Li, Xiaomeng Liu, Yang Sun, Mengsha Gao, Min Li, Tong Liang, Jian Zhai, Yuanqi Xu, Mengqiao She, Xiangjun Yang, Shiqi Liu, Wenjia Luo, Xueting Sun, Xiaodong |
author_sort | Li, Xiaomeng |
collection | PubMed |
description | PURPOSE: Gasdermin D (GSDMD) is crucial in neuronal pyroptosis. GSDMD-N and GSDMD-C are two subdomains of the protein GSDMD. GSDMD-N is an executor of pyroptosis, and GSDMD-C has an inhibitory effect on pyroptotic cell death. This study evaluated the role of GSDMD in photoreceptor cell pyroptosis caused by retinal detachment (RD). METHODS: RD models were established in rats, and GSDMD cleavage was detected by western blotting. The morphology of photoreceptors was assessed by transmission electron microscopy. Some rats were given subretinal injections of recombinant adeno-associated virus 2/8 (rAAV2/8)–GSDMD-C before RD surgery. We documented the expression of caspase-1 and GSDMD-N in retinas by western blot. Levels of IL-1β, TNF-α, and monocyte chemoattractant protein-1 (MCP-1) were detected by quantitative RT-PCR. The membrane integrity of photoreceptors was evaluated by TOTO-3 iodide staining. Retinal function was measured by electroretinography, and the thickness of the outer nuclear layer was also recorded. We measured the activation of glial fibrillary acidic protein (GFAP), F4/80, and ionized calcium binding adaptor molecule 1 (Iba-1) by immunofluorescence. RESULTS: The cleavage of GSDMD peaked at 1 day after RD. The administration of rAAV2/8–GSDMD-C reduced the pyroptosis and subsequent apoptosis of photoreceptors and preserved the retinal function after RD. Expression of IL-1, TNF-α, and MCP-1 was decreased in the rAAV2/8–GSDMD-C group. In addition, the activation of GFAP, Iba-1, and F4/80 in retinas was alleviated by administering rAAV2/8–GSDMD-C after RD. CONCLUSIONS: GSDMD participates in the pyroptosis of photoreceptor after RD. Overexpression of GSDMD-C may block GSDMD cleavage and attenuate photoreceptor degeneration. |
format | Online Article Text |
id | pubmed-7425730 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-74257302020-08-26 Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment Li, Xiaomeng Liu, Yang Sun, Mengsha Gao, Min Li, Tong Liang, Jian Zhai, Yuanqi Xu, Mengqiao She, Xiangjun Yang, Shiqi Liu, Wenjia Luo, Xueting Sun, Xiaodong Invest Ophthalmol Vis Sci Retina PURPOSE: Gasdermin D (GSDMD) is crucial in neuronal pyroptosis. GSDMD-N and GSDMD-C are two subdomains of the protein GSDMD. GSDMD-N is an executor of pyroptosis, and GSDMD-C has an inhibitory effect on pyroptotic cell death. This study evaluated the role of GSDMD in photoreceptor cell pyroptosis caused by retinal detachment (RD). METHODS: RD models were established in rats, and GSDMD cleavage was detected by western blotting. The morphology of photoreceptors was assessed by transmission electron microscopy. Some rats were given subretinal injections of recombinant adeno-associated virus 2/8 (rAAV2/8)–GSDMD-C before RD surgery. We documented the expression of caspase-1 and GSDMD-N in retinas by western blot. Levels of IL-1β, TNF-α, and monocyte chemoattractant protein-1 (MCP-1) were detected by quantitative RT-PCR. The membrane integrity of photoreceptors was evaluated by TOTO-3 iodide staining. Retinal function was measured by electroretinography, and the thickness of the outer nuclear layer was also recorded. We measured the activation of glial fibrillary acidic protein (GFAP), F4/80, and ionized calcium binding adaptor molecule 1 (Iba-1) by immunofluorescence. RESULTS: The cleavage of GSDMD peaked at 1 day after RD. The administration of rAAV2/8–GSDMD-C reduced the pyroptosis and subsequent apoptosis of photoreceptors and preserved the retinal function after RD. Expression of IL-1, TNF-α, and MCP-1 was decreased in the rAAV2/8–GSDMD-C group. In addition, the activation of GFAP, Iba-1, and F4/80 in retinas was alleviated by administering rAAV2/8–GSDMD-C after RD. CONCLUSIONS: GSDMD participates in the pyroptosis of photoreceptor after RD. Overexpression of GSDMD-C may block GSDMD cleavage and attenuate photoreceptor degeneration. The Association for Research in Vision and Ophthalmology 2020-07-22 /pmc/articles/PMC7425730/ /pubmed/32697303 http://dx.doi.org/10.1167/iovs.61.8.31 Text en Copyright 2020 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. |
spellingShingle | Retina Li, Xiaomeng Liu, Yang Sun, Mengsha Gao, Min Li, Tong Liang, Jian Zhai, Yuanqi Xu, Mengqiao She, Xiangjun Yang, Shiqi Liu, Wenjia Luo, Xueting Sun, Xiaodong Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment |
title | Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment |
title_full | Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment |
title_fullStr | Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment |
title_full_unstemmed | Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment |
title_short | Photoreceptors Degenerate Through Pyroptosis After Experimental Retinal Detachment |
title_sort | photoreceptors degenerate through pyroptosis after experimental retinal detachment |
topic | Retina |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7425730/ https://www.ncbi.nlm.nih.gov/pubmed/32697303 http://dx.doi.org/10.1167/iovs.61.8.31 |
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