Cargando…

Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes

Progressive rod-cone degeneration (PRCD) is a small protein localized to photoreceptor outer segment (OS) disc membranes. Several mutations in PRCD are linked to retinitis pigmentosa (RP) in canines and humans, and while recent studies have established that PRCD is required for high fidelity disc mo...

Descripción completa

Detalles Bibliográficos
Autores principales: Sechrest, Emily R., Murphy, Joseph, Senapati, Subhadip, Goldberg, Andrew F. X., Park, Paul S.-H., Kolandaivelu, Saravanan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7577997/
https://www.ncbi.nlm.nih.gov/pubmed/33087780
http://dx.doi.org/10.1038/s41598-020-74628-2
_version_ 1783598279333773312
author Sechrest, Emily R.
Murphy, Joseph
Senapati, Subhadip
Goldberg, Andrew F. X.
Park, Paul S.-H.
Kolandaivelu, Saravanan
author_facet Sechrest, Emily R.
Murphy, Joseph
Senapati, Subhadip
Goldberg, Andrew F. X.
Park, Paul S.-H.
Kolandaivelu, Saravanan
author_sort Sechrest, Emily R.
collection PubMed
description Progressive rod-cone degeneration (PRCD) is a small protein localized to photoreceptor outer segment (OS) disc membranes. Several mutations in PRCD are linked to retinitis pigmentosa (RP) in canines and humans, and while recent studies have established that PRCD is required for high fidelity disc morphogenesis, its precise role in this process remains a mystery. To better understand the part which PRCD plays in disease progression as well as its contribution to photoreceptor OS disc morphogenesis, we generated a Prcd-KO animal model using CRISPR/Cas9. Loss of PRCD from the retina results in reduced visual function accompanied by slow rod photoreceptor degeneration. We observed a significant decrease in rhodopsin levels in Prcd-KO retina prior to photoreceptor degeneration. Furthermore, ultrastructural analysis demonstrates that rod photoreceptors lacking PRCD display disoriented and dysmorphic OS disc membranes. Strikingly, atomic force microscopy reveals that many disc membranes in Prcd-KO rod photoreceptor neurons are irregular, containing fewer rhodopsin molecules and decreased rhodopsin packing density compared to wild-type discs. This study strongly suggests an important role for PRCD in regulation of rhodopsin incorporation and packaging density into disc membranes, a process which, when dysregulated, likely gives rise to the visual defects observed in patients with PRCD-associated RP.
format Online
Article
Text
id pubmed-7577997
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-75779972020-10-23 Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes Sechrest, Emily R. Murphy, Joseph Senapati, Subhadip Goldberg, Andrew F. X. Park, Paul S.-H. Kolandaivelu, Saravanan Sci Rep Article Progressive rod-cone degeneration (PRCD) is a small protein localized to photoreceptor outer segment (OS) disc membranes. Several mutations in PRCD are linked to retinitis pigmentosa (RP) in canines and humans, and while recent studies have established that PRCD is required for high fidelity disc morphogenesis, its precise role in this process remains a mystery. To better understand the part which PRCD plays in disease progression as well as its contribution to photoreceptor OS disc morphogenesis, we generated a Prcd-KO animal model using CRISPR/Cas9. Loss of PRCD from the retina results in reduced visual function accompanied by slow rod photoreceptor degeneration. We observed a significant decrease in rhodopsin levels in Prcd-KO retina prior to photoreceptor degeneration. Furthermore, ultrastructural analysis demonstrates that rod photoreceptors lacking PRCD display disoriented and dysmorphic OS disc membranes. Strikingly, atomic force microscopy reveals that many disc membranes in Prcd-KO rod photoreceptor neurons are irregular, containing fewer rhodopsin molecules and decreased rhodopsin packing density compared to wild-type discs. This study strongly suggests an important role for PRCD in regulation of rhodopsin incorporation and packaging density into disc membranes, a process which, when dysregulated, likely gives rise to the visual defects observed in patients with PRCD-associated RP. Nature Publishing Group UK 2020-10-21 /pmc/articles/PMC7577997/ /pubmed/33087780 http://dx.doi.org/10.1038/s41598-020-74628-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Sechrest, Emily R.
Murphy, Joseph
Senapati, Subhadip
Goldberg, Andrew F. X.
Park, Paul S.-H.
Kolandaivelu, Saravanan
Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes
title Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes
title_full Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes
title_fullStr Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes
title_full_unstemmed Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes
title_short Loss of PRCD alters number and packaging density of rhodopsin in rod photoreceptor disc membranes
title_sort loss of prcd alters number and packaging density of rhodopsin in rod photoreceptor disc membranes
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7577997/
https://www.ncbi.nlm.nih.gov/pubmed/33087780
http://dx.doi.org/10.1038/s41598-020-74628-2
work_keys_str_mv AT sechrestemilyr lossofprcdaltersnumberandpackagingdensityofrhodopsininrodphotoreceptordiscmembranes
AT murphyjoseph lossofprcdaltersnumberandpackagingdensityofrhodopsininrodphotoreceptordiscmembranes
AT senapatisubhadip lossofprcdaltersnumberandpackagingdensityofrhodopsininrodphotoreceptordiscmembranes
AT goldbergandrewfx lossofprcdaltersnumberandpackagingdensityofrhodopsininrodphotoreceptordiscmembranes
AT parkpaulsh lossofprcdaltersnumberandpackagingdensityofrhodopsininrodphotoreceptordiscmembranes
AT kolandaivelusaravanan lossofprcdaltersnumberandpackagingdensityofrhodopsininrodphotoreceptordiscmembranes