Multi-color Flow Cytometry Protocol to Characterize Myeloid Cells in Mouse Retina Research
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Updated: Jul 17, 2025
Assessing Retinal Microglial Phagocytic Function In Vivo Using a Flow Cytometry-based Assay
Published on: October 18, 2016
Wei Xiao1,2, Rami A Shahror3, Carol A Morris3
1Vascular Biology Center, Augusta University, Augusta, GA, USA.
Abstract:
Myeloid cells, specifically microglia and macrophages, are activated in retinal diseases and can improve or worsen retinopathy outcomes based on their inflammatory phenotype. However, assessing the myeloid cell response after retinal injury in mice remains challenging due to the small tissue size and the challenges of distinguishing microglia from infiltrating macrophages. In this protocol paper, we describe a flow cytometry-based protocol to assess retinal microglia/macrophage and their inflammatory phenotype after injury. The protocol is amenable to the incorporation of other markers of interest to other researchers. Key features This protocol describes a flow cytometry-based method to analyze the myeloid cell response in retinopathy mouse models. The protocol can distinguish between microglia- and monocyte-derived macrophages. It can be modified to incorporate markers of interest. We show representative results from three different retinopathy models, namely ischemia-reperfusion injury, endotoxin-induced uveitis, and oxygen-induced retinopathy.
Insights
This study presents a flow cytometry protocol to analyze myeloid cell responses in mouse models of retinopathy. The method distinguishes between microglia and macrophages, aiding research into retinal disease mechanisms.
Area of Science:
- Immunology
- Ophthalmology
- Cell Biology
Background:
- Myeloid cells, including microglia and macrophages, play a critical role in retinal diseases.
- Their inflammatory phenotype influences disease progression, but assessing their response in mouse models is difficult.
- Distinguishing between resident microglia and infiltrating macrophages in small retinal tissues is a key challenge.
Purpose of the Study:
- To establish a flow cytometry-based protocol for analyzing myeloid cell populations and their inflammatory status in the retina after injury.
- To provide a method capable of differentiating between microglia and monocyte-derived macrophages.
- To offer a protocol adaptable for incorporating additional markers relevant to various retinal research.
Main Methods:
- Development and application of a flow cytometry protocol using mouse models of retinal injury.
- Utilizing specific markers to distinguish between microglia and infiltrating macrophages.
- Analysis of myeloid cell populations in models including ischemia-reperfusion injury, endotoxin-induced uveitis, and oxygen-induced retinopathy.
Main Results:
- A robust flow cytometry protocol was successfully established for assessing retinal myeloid cells.
- The protocol effectively distinguishes between microglia and monocyte-derived macrophages.
- Representative data were generated from three distinct retinopathy models, demonstrating protocol utility.
Conclusions:
- The described flow cytometry protocol offers a valuable tool for studying myeloid cell responses in retinopathy.
- This method facilitates a deeper understanding of the roles of microglia and macrophages in retinal disease pathogenesis.
- The protocol's adaptability allows for broad application in retinal research investigating myeloid cell involvement.
