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Glial Cells

Glial Cells

The Retina

The Retina

The retina is a layer of nervous tissue at the back of the eye that transduces light into neural signals. This process, called phototransduction, is carried out by rod and cone photoreceptor cells in the back of the retina.

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Related Experiment Video

Updated: May 30, 2025

In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma

In Vivo Dynamics of Retinal Microglial Activation During Neurodegeneration: Confocal Ophthalmoscopic Imaging and Cell Morphometry in Mouse Glaucoma

Published on: May 11, 2015

Glia Modulates Immune Responses in the Retina Through Distinct MHC Pathways.

Simona Intonti^1,2, Despina Kokona², Martin S Zinkernagel²

¹Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy.

|January 28, 2025

Summary

Retinal glial cells, including microglia and Müller cells, act as antigen-presenting cells (APCs) during retinal degeneration. They modulate immune responses through distinct pathways, crucial for understanding and treating retinal pathologies.

Keywords:

Müller cells T‐cells antigen‐presenting cells microglia retina

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Last Updated: May 30, 2025

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Müller Glia Cell Activation in a Laser-induced Retinal Degeneration and Regeneration Model in Zebrafish

Müller Glia Cell Activation in a Laser-induced Retinal Degeneration and Regeneration Model in Zebrafish

Published on: October 27, 2017

Area of Science:

Neuroimmunology
Ophthalmology
Cellular Immunology

Background:

Glial cells are key to retinal immune surveillance and homeostasis.
Mechanisms of glial cell activation and coordination in retinal injury are not fully understood.
Antigen presentation by glia plays a critical role in retinal degeneration (RD).

Purpose of the Study:

To investigate the role of glial antigen-presenting cells (APCs) in retinal degeneration.
To elucidate the distinct mechanisms of antigen presentation by microglia and Müller cells.
To understand the impact of glial APCs on T-cell responses in the retina.

Main Methods:

Animal models of retinal injury
Retrospective analysis of human retinas
In vitro assays with glial cells and T-cells

Main Results:

Microglia function as APCs via MHC Class II, upregulating Csf1r and cytokines.
Müller cells act via MHC Class I, promoting CD8+ T-cell responses.
Glial activation and MHC expression correlate with retinal degenerative changes in human samples.
Distinct cytokine pathways (TNF-α, IFN Type I) regulate immune balance.

Conclusions:

Retinal glial cells (microglia and Müller cells) are crucial antigen-presenting cells in RD.
These cells differentially modulate immune responses, influencing T-cell interactions.
Understanding glia-mediated antigen presentation is vital for developing therapies for retinal diseases.