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Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen
PURPOSE: Choroidal vascular changes occur with normal aging and age-related macular degeneration (AMD). Here, we evaluate choroidal thickness and vascularity in aged rhesus macaques to better understand the choroid's role in this nonhuman primate model of AMD. METHODS: We analyzed optical coher...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Association for Research in Vision and Ophthalmology
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10547013/ https://www.ncbi.nlm.nih.gov/pubmed/37773500 http://dx.doi.org/10.1167/iovs.64.12.44 |
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author | Sazhnyev, Yevgeniy Sin, Tzu-Ni Ma, Anthony Chang, Ellie Huynh, Leon Roszak, Karolina Park, Sangwan Choy, Kevin Farsiu, Sina Moshiri, Ala Thomasy, Sara M. Yiu, Glenn |
author_facet | Sazhnyev, Yevgeniy Sin, Tzu-Ni Ma, Anthony Chang, Ellie Huynh, Leon Roszak, Karolina Park, Sangwan Choy, Kevin Farsiu, Sina Moshiri, Ala Thomasy, Sara M. Yiu, Glenn |
author_sort | Sazhnyev, Yevgeniy |
collection | PubMed |
description | PURPOSE: Choroidal vascular changes occur with normal aging and age-related macular degeneration (AMD). Here, we evaluate choroidal thickness and vascularity in aged rhesus macaques to better understand the choroid's role in this nonhuman primate model of AMD. METHODS: We analyzed optical coherence tomography (OCT) images of 244 eyes from 122 rhesus macaques (aged 4–32 years) to measure choroidal thickness (CT) and choroidal vascularity index (CVI). Drusen number, size, and volume were measured by semiautomated annotation and segmentation of OCT images. We performed regression analyses to determine any association of CT or CVI with age, sex, and axial length and to determine if the presence and volume of soft drusen impacted these choroidal parameters. RESULTS: In rhesus macaques, subfoveal CT decreased with age at 3.2 µm/y (R(2) = 0.481, P < 0.001), while CVI decreased at 0.66% per year (R(2) = 0.257, P < 0.001). Eyes with soft drusen exhibited thicker choroid (179.9 ± 17.5 µm vs. 162.0 ± 27.9 µm, P < 0.001) and higher CVI (0.612 ± 0.051 vs. 0.577 ± 0.093, P = 0.005) than age-matched control animals. Neither CT or CVI appeared to be associated with drusen number, size, or volume in this cohort. However, some drusen in macaques were associated with underlying choroidal vessel enlargement resembling pachydrusen in human patients with AMD. CONCLUSIONS: Changes in the choroidal vasculature in rhesus macaques resemble choroidal changes in human aging, but eyes with drusen exhibit choroidal thickening, increased vascularity, and phenotypic characteristics of pachydrusen observed in some patients with AMD. |
format | Online Article Text |
id | pubmed-10547013 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Association for Research in Vision and Ophthalmology |
record_format | MEDLINE/PubMed |
spelling | pubmed-105470132023-10-04 Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen Sazhnyev, Yevgeniy Sin, Tzu-Ni Ma, Anthony Chang, Ellie Huynh, Leon Roszak, Karolina Park, Sangwan Choy, Kevin Farsiu, Sina Moshiri, Ala Thomasy, Sara M. Yiu, Glenn Invest Ophthalmol Vis Sci Retina PURPOSE: Choroidal vascular changes occur with normal aging and age-related macular degeneration (AMD). Here, we evaluate choroidal thickness and vascularity in aged rhesus macaques to better understand the choroid's role in this nonhuman primate model of AMD. METHODS: We analyzed optical coherence tomography (OCT) images of 244 eyes from 122 rhesus macaques (aged 4–32 years) to measure choroidal thickness (CT) and choroidal vascularity index (CVI). Drusen number, size, and volume were measured by semiautomated annotation and segmentation of OCT images. We performed regression analyses to determine any association of CT or CVI with age, sex, and axial length and to determine if the presence and volume of soft drusen impacted these choroidal parameters. RESULTS: In rhesus macaques, subfoveal CT decreased with age at 3.2 µm/y (R(2) = 0.481, P < 0.001), while CVI decreased at 0.66% per year (R(2) = 0.257, P < 0.001). Eyes with soft drusen exhibited thicker choroid (179.9 ± 17.5 µm vs. 162.0 ± 27.9 µm, P < 0.001) and higher CVI (0.612 ± 0.051 vs. 0.577 ± 0.093, P = 0.005) than age-matched control animals. Neither CT or CVI appeared to be associated with drusen number, size, or volume in this cohort. However, some drusen in macaques were associated with underlying choroidal vessel enlargement resembling pachydrusen in human patients with AMD. CONCLUSIONS: Changes in the choroidal vasculature in rhesus macaques resemble choroidal changes in human aging, but eyes with drusen exhibit choroidal thickening, increased vascularity, and phenotypic characteristics of pachydrusen observed in some patients with AMD. The Association for Research in Vision and Ophthalmology 2023-09-29 /pmc/articles/PMC10547013/ /pubmed/37773500 http://dx.doi.org/10.1167/iovs.64.12.44 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 Sazhnyev, Yevgeniy Sin, Tzu-Ni Ma, Anthony Chang, Ellie Huynh, Leon Roszak, Karolina Park, Sangwan Choy, Kevin Farsiu, Sina Moshiri, Ala Thomasy, Sara M. Yiu, Glenn Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen |
title | Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen |
title_full | Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen |
title_fullStr | Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen |
title_full_unstemmed | Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen |
title_short | Choroidal Changes in Rhesus Macaques in Aging and Age-Related Drusen |
title_sort | choroidal changes in rhesus macaques in aging and age-related drusen |
topic | Retina |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10547013/ https://www.ncbi.nlm.nih.gov/pubmed/37773500 http://dx.doi.org/10.1167/iovs.64.12.44 |
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