Related Experiment Video
Updated: Sep 27, 2025
Assessing Retinal Microglial Phagocytic Function In Vivo Using a Flow Cytometry-based Assay
Published on: October 18, 2016
Retinal microglia: Functions and diseases
Wei Fan1,2,3,4, Weidi Huang1,5, Jiayi Chen1
1The First Affiliated Hospital of Chongqing Medical University, Chongqing, China.
Abstract:
Microglia, the resident immune cells in the retina and nervous system, make irreplaceable contributions to the maintenance of normal homeostasis and immune surveillance of these systems. Recently, great progress has been made in determining the origin, distribution, features and functions of retinal microglia and in identifying their roles in retinal diseases. In the retinal microenvironment, microglia constantly monitor changes in their surroundings and maintain balanced functions by communicating with other retinal cells. When disturbed, activated microglia may kill degenerated neurons and photoreceptors through phagocytosis and exacerbate retinal injury by producing multiple proinflammatory mediators. Numerous animal studies and in situ analyses of human tissue have shown that retinal microglia are involved in multiple retinal diseases. The functions and mechanisms of activated microglia in retinal disorders are gradually being elucidated. Increasing evidence points towards the dual roles of microglia in the retina and they are regulated by many factors. How to inhibit the detrimental effects of microglia and promote beneficial effects are worth studying. This review focuses primarily on the features and functions of microglia and how they participate in retinal diseases based on existing research findings. We also discuss current opinions about microglial transdifferentiation.
Insights
Retinal microglia are crucial for eye health, acting as immune cells that maintain homeostasis. Dysfunctional microglia can worsen retinal diseases, highlighting the need to understand and modulate their dual roles.
Area of Science:
- Neuroimmunology
- Ophthalmology
- Cell Biology
Background:
- Microglia are essential resident immune cells in the retina and nervous system.
- They play vital roles in maintaining retinal homeostasis and immune surveillance.
- Recent research has advanced understanding of their origin, distribution, and function in retinal diseases.
Purpose of the Study:
- To review the features and functions of microglia in the retina.
- To elucidate their participation in various retinal diseases.
- To discuss current perspectives on microglial transdifferentiation and their dual roles.
Main Methods:
- Review of existing research findings on retinal microglia.
- Analysis of animal studies and human tissue data.
- Examination of microglial roles in retinal disease pathogenesis.
Main Results:
- Microglia constantly monitor the retinal microenvironment and communicate with other retinal cells.
- Activated microglia can contribute to retinal injury through phagocytosis and inflammation.
- Evidence indicates microglia have dual roles in the retina, influenced by regulatory factors.
Conclusions:
- Understanding microglial functions is key to addressing retinal diseases.
- Further research is needed to inhibit detrimental microglial effects and promote beneficial ones.
- Modulating microglial activity presents a potential therapeutic strategy for retinal disorders.
