Cited by 305Retinal Diseases and TreatmentsOcular Diseases and Behçet’s SyndromeNeuroinflammation and Neurodegeneration Mechanisms

Immune Regulation in the Aging Retina

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Chen, Mei, Luo, Chang, Zhao, Jiawu, Devarajan, Gayathri, Xu, Heping·2019·Progress in Retinal and Eye Research

Abstract

The retina is an immune privileged tissue, which is protected from external and internal insults by its blood-retina barriers and immune suppressive microenvironment. Apart from the avoidance and tolerance strategies, the retina is also protected by its own defense system, i.e., microglia and the complement system. The immune privilege and defense mechanisms work together to maintain retinal homeostasis. During aging, the retina is at an increased risk of developing various degenerative diseases such as age-related macular degeneration, diabetic retinopathy, and glaucomatous retinopathy. Previously, we have shown that aging induces a para-inflammatory response in the retina. In this review, we explore the impact of aging on retinal immune regulation and the connection between homeostatic control of retinal immune privilege and para-inflammation under aging conditions and present a view that may explain why aging puts the retina at risk of developing degenerative diseases.

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Crossref · 10.1016/j.preteyeres.2018.10.003

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  • The blood-retina barrier acts as a physical and immune bulwark, blocking entry of circulating immune cells inside the retina and preventing antigens from escaping the retina.

    “The blood-retina barrier, which is partly composed by tight junctions (depicted in yellow) between RPE cells, acts as a physical and immune bulwark.It blocks the entry of circulating immune cells inside the retina and prevents antigens from escaping the retina [14][15][16].”

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Authors
Chen, M., Luo, C., Zhao, J., Devarajan, G., & Xu, H.
Affiliations
  • Queen's University Belfast (GB)
  • University of Aberdeen (GB)
Corresponding author
Xu, Heping
Venue
Progress in Retinal and Eye Research
Publisher
Elsevier BV
Published
2019-03
Volume
69
Pages
159-172
ISSN
1350-9462 (ISSN-L)
OpenAlex
W2897831960
Cited by
305
References
166
Citations by year
2026: 29 · 2025: 58 · 2024: 76 · 2023: 45 · 2022: 34 · 2021: 32 · 2020: 25 · 2019: 6
FWCI
2.70
Type
journal article
Language
en
Open access
Locations
  • Progress in Retinal and Eye Research (publishedVersion)
  • PubMed (publishedVersion)
  • Research Portal (Queen's University Belfast) (publishedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Fight for Sight (1361/1362, 1425/1426, 1574/1574, 5057/5058)
  • Dunhill Medical Trust (R188/0211)
  • National Eye Research Centre (SCIAD 061)
Topics
  • Health Sciences › Medicine › Ophthalmology › Retinal Diseases and Treatments
  • Health Sciences › Medicine › Ophthalmology › Ocular Diseases and Behçet’s Syndrome
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
retinal aging, immune privilege, blood-retinal barrier, microglia, complement system, retinal homeostasis, age-related macular degeneration, diabetic retinopathy, retinal degeneration
MeSH terms
Immune Privilege, Aging, Animals, Blood-Retinal Barrier, Epithelial Cells, Humans, Inflammation, Neurons, Retina, Retinal Diseases, Microglia, Retinal Pigment Epithelium

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