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The Role of Retinal Pigment Epithelial Cells in Regulation of Macrophages/Microglial Cells in Retinal Immunobiology

Andrew W. Taylor, Samuel Hsu, Tat Fong Ng2021Frontiers in ImmunologyReview
10.3389/fimmu.2021.724601PubMedFree full text
Immune/InnateNeurologicalOcular

Abstract

The ocular tissue microenvironment is immune privileged and uses several mechanisms of immunosuppression to prevent the induction of inflammation. Besides being a blood-barrier and source of photoreceptor nutrients, the retinal pigment epithelial cells (RPE) regulate the activity of immune cells within the retina. These mechanisms involve the expression of immunomodulating molecules that make macrophages and microglial cells suppress inflammation and promote immune tolerance. The RPE have an important role in ocular immune privilege to regulate the behavior of immune cells within the retina. Reviewed is the current understanding of how RPE mediate this regulation and the changes seen under pathological conditions.

Cited By (2)

  • Ocular immune privilege and retinal pigment epithelial cellsJournal of Leukocyte Biology · 2023
  • Alpha-Melanocyte-Stimulating Hormone Maintains Retinal Homeostasis after Ischemia/ReperfusionBiomolecules · 2024

References (5)

  • The immunomodulating neuropeptide alpha-melanocyte-stimulating hormone (α-MSH) suppresses LPS-stimulated TLR4 with IRAK-M in macrophagesJournal of Neuroimmunology · 2005
  • Identification of alpha-melanocyte stimulating hormone as a potential immunosuppressive factor in aqueous humorCurrent Eye Research · 1992
  • Neuropeptide Regulation of Immunity: The Immunosuppressive Activity of Alpha‐Melanocyte‐Stimulating Hormone (α‐MSH)Annals of the New York Academy of Sciences · 2000
  • Melanocortin 5 Receptor Expression and Recovery of Ocular Immune Privilege after UveitisOcular Immunology and Inflammation · 2021

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