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Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes

PURPOSE: The expression of silent information regulator (SIRT) 1 is reduced in diabetic retinopathy (DR). Previous studies showed that alterations in SIRT1 messenger RNA (mRNA) and protein expression are implicated in progressive inflammation and formation of retinal acellular capillaries. Treatment...

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Autores principales: Adu-Agyeiwaah, Yvonne, Vieira, Cristiano P., Asare-Bediako, Bright, Li Calzi, Sergio, DuPont, Mariana, Floyd, Jason, Boye, Sanford, Chiodo, Vince, Busik, Julia V., Grant, Maria B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Association for Research in Vision and Ophthalmology 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10123324/
https://www.ncbi.nlm.nih.gov/pubmed/37070938
http://dx.doi.org/10.1167/tvst.12.4.20
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author Adu-Agyeiwaah, Yvonne
Vieira, Cristiano P.
Asare-Bediako, Bright
Li Calzi, Sergio
DuPont, Mariana
Floyd, Jason
Boye, Sanford
Chiodo, Vince
Busik, Julia V.
Grant, Maria B.
author_facet Adu-Agyeiwaah, Yvonne
Vieira, Cristiano P.
Asare-Bediako, Bright
Li Calzi, Sergio
DuPont, Mariana
Floyd, Jason
Boye, Sanford
Chiodo, Vince
Busik, Julia V.
Grant, Maria B.
author_sort Adu-Agyeiwaah, Yvonne
collection PubMed
description PURPOSE: The expression of silent information regulator (SIRT) 1 is reduced in diabetic retinopathy (DR). Previous studies showed that alterations in SIRT1 messenger RNA (mRNA) and protein expression are implicated in progressive inflammation and formation of retinal acellular capillaries. Treatment with the SIRT1 agonist, SRT1720, improved visual response by restoration of a- and b-wave responses on electroretinogram scotopic measurements in diabetic (db/db) mice. In this study, we investigated the effects of intravitreal SIRT1 delivery on diabetic retinal pathology. METHODS: Nine-month-old db/db mice received one intravitreal injection of either AAV2-SIRT1 or AAV2-GFP control virus, and after 3 months, electroretinography and optomotor responses were measured. Their eyes were then removed and analyzed by immunohistochemistry and flow cytometry. RESULTS: SIRT1 mRNA and protein levels were increased following AAV2-SIRT1 administration compared to control virus AAV2-GFP injected mice. IBA1(+) and caspase 3 expression were decreased in retinas of db/db mice injected with AAV2-SIRT1, and reductions in scotopic a- and b-waves and high spatial frequency in optokinetic response were prevented. Retinal hypoxia inducible factor 1α (HIF-1α) protein levels were reduced in the AAV2-SIRT1–injected mice compared to control-injected mice. Using flow cytometry to assess changes in intracellular HIF-1α levels, endothelial cells (CD31(+)) from AAV-2 SIRT1 injected mice demonstrated reduced HIF-1α expression compared to db/db mice injected with the control virus. CONCLUSIONS: Intravitreal AAV2-SIRT1 delivery increased retina SIRT1 and transduced neural and endothelial cells, thus reversing functional damage and improving overall visual function. TRANSLATIONAL RELEVANCE: AAV2-SIRT1 gene therapy represents a beneficial approach for the treatment of chronic retinal conditions such as DR.
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spelling pubmed-101233242023-04-25 Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes Adu-Agyeiwaah, Yvonne Vieira, Cristiano P. Asare-Bediako, Bright Li Calzi, Sergio DuPont, Mariana Floyd, Jason Boye, Sanford Chiodo, Vince Busik, Julia V. Grant, Maria B. Transl Vis Sci Technol Retina PURPOSE: The expression of silent information regulator (SIRT) 1 is reduced in diabetic retinopathy (DR). Previous studies showed that alterations in SIRT1 messenger RNA (mRNA) and protein expression are implicated in progressive inflammation and formation of retinal acellular capillaries. Treatment with the SIRT1 agonist, SRT1720, improved visual response by restoration of a- and b-wave responses on electroretinogram scotopic measurements in diabetic (db/db) mice. In this study, we investigated the effects of intravitreal SIRT1 delivery on diabetic retinal pathology. METHODS: Nine-month-old db/db mice received one intravitreal injection of either AAV2-SIRT1 or AAV2-GFP control virus, and after 3 months, electroretinography and optomotor responses were measured. Their eyes were then removed and analyzed by immunohistochemistry and flow cytometry. RESULTS: SIRT1 mRNA and protein levels were increased following AAV2-SIRT1 administration compared to control virus AAV2-GFP injected mice. IBA1(+) and caspase 3 expression were decreased in retinas of db/db mice injected with AAV2-SIRT1, and reductions in scotopic a- and b-waves and high spatial frequency in optokinetic response were prevented. Retinal hypoxia inducible factor 1α (HIF-1α) protein levels were reduced in the AAV2-SIRT1–injected mice compared to control-injected mice. Using flow cytometry to assess changes in intracellular HIF-1α levels, endothelial cells (CD31(+)) from AAV-2 SIRT1 injected mice demonstrated reduced HIF-1α expression compared to db/db mice injected with the control virus. CONCLUSIONS: Intravitreal AAV2-SIRT1 delivery increased retina SIRT1 and transduced neural and endothelial cells, thus reversing functional damage and improving overall visual function. TRANSLATIONAL RELEVANCE: AAV2-SIRT1 gene therapy represents a beneficial approach for the treatment of chronic retinal conditions such as DR. The Association for Research in Vision and Ophthalmology 2023-04-18 /pmc/articles/PMC10123324/ /pubmed/37070938 http://dx.doi.org/10.1167/tvst.12.4.20 Text en Copyright 2023 The Authors https://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
Adu-Agyeiwaah, Yvonne
Vieira, Cristiano P.
Asare-Bediako, Bright
Li Calzi, Sergio
DuPont, Mariana
Floyd, Jason
Boye, Sanford
Chiodo, Vince
Busik, Julia V.
Grant, Maria B.
Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes
title Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes
title_full Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes
title_fullStr Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes
title_full_unstemmed Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes
title_short Intravitreal Administration of AAV2-SIRT1 Reverses Diabetic Retinopathy in a Mouse Model of Type 2 Diabetes
title_sort intravitreal administration of aav2-sirt1 reverses diabetic retinopathy in a mouse model of type 2 diabetes
topic Retina
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10123324/
https://www.ncbi.nlm.nih.gov/pubmed/37070938
http://dx.doi.org/10.1167/tvst.12.4.20
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