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Updated: Feb 28, 2026
Digestion of Whole Mouse Eyes for Multi-Parameter Flow Cytometric Analysis of Mononuclear Phagocytes
Published on: June 17, 2020
On phagocytes and macular degeneration
Xavier Guillonneau1, Chiara M Eandi2, Michel Paques3
1Institut de la Vision, 17 rue Moreau, Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, 75012, Paris, France.
Abstract:
Age related macular degeneration (AMD) is a complex multifactorial disease caused by the interplay of age and genetic and environmental risk factors. A common feature observed in early and both forms of late AMD is the breakdown of the physiologically immunosuppressive subretinal environment and the protracted accumulation of mononuclear phagocytes (MP). We here discuss the origin and nature of subretinal MPs, the mechanisms that lead to their accumulation, the inflammatory mediators they produce as well as the consequences of their chronic presence on photoreceptors, retinal pigment epithelium and choroid. Recent advances highlight how both genetic and environmental risk factors directly promote subretinal inflammation and tip the balance from a beneficial inflammation that helps control debris accumulation to detrimental chronic inflammation and destructive late AMD. Finally, we discuss how changes in life style or pharmacological intervention can help to break the vicious cycle of inflammation and degeneration, restore the immunosuppressive properties of the subretinal space, and reestablish homeostasis.
Insights
Age related macular degeneration (AMD) involves immune cell accumulation in the eye. Understanding these immune cells and inflammation is key to developing treatments for this degenerative eye disease.
Area of Science:
- Ophthalmology
- Immunology
- Genetics
Background:
- Age-related macular degeneration (AMD) is a complex disease influenced by aging, genetics, and environment.
- A hallmark of AMD is the breakdown of the subretinal immunosuppressive environment and accumulation of mononuclear phagocytes (MPs).
Purpose of the Study:
- To discuss the origin, nature, and accumulation mechanisms of subretinal MPs in AMD.
- To explore the inflammatory mediators produced by MPs and their consequences on retinal tissues.
- To examine how genetic and environmental factors contribute to AMD pathogenesis and discuss potential interventions.
Main Methods:
- Literature review and synthesis of current research on subretinal inflammation and AMD.
- Analysis of the role of mononuclear phagocytes in the disease progression.
- Discussion of therapeutic strategies targeting inflammation and degeneration.
Main Results:
- Subretinal MPs accumulate due to a breakdown in immune tolerance, driven by genetic and environmental factors.
- Chronic inflammation mediated by MPs leads to photoreceptor, RPE, and choroid degeneration.
- Both lifestyle changes and pharmacological interventions show potential in restoring homeostasis.
Conclusions:
- Subretinal inflammation and MP accumulation are central to AMD progression.
- Targeting inflammatory pathways and modifying risk factors may offer therapeutic benefits.
- Restoring the subretinal immunosuppressive environment is crucial for halting AMD.
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