Glial cell proliferation in human retinal detachment with massive periretinal proliferation

Area of Science:

• Ophthalmology
• Cell Biology
• Materials Science

Background:

• Epiretinal membranes (ERMs) are a common complication of rhegmatogenous retinal detachment.
• Understanding the cellular and molecular composition of ERMs is crucial for developing effective treatments.

Purpose of the Study:

• To characterize the ultrastructure of epiretinal membranes obtained from human eyes with rhegmatogenous retinal detachment.
• To investigate the cellular composition and extracellular matrix of newly formed ERMs.
• To identify crystalline deposits within ERMs.

Main Methods:

• Transmission electron microscopy (TEM) was used to examine 38 human epiretinal membranes.
• Energy-dispersive X-ray analysis (EDX) was employed to identify crystalline structures.

Main Results:

• Two ERMs were primarily composed of glial cell processes with filaments and microtubules.
• Microvilli and junctional complexes were observed on the vitreal surface of glial cells.
• Newly formed ERMs contained large cells with extensive rough endoplasmic reticulum, collagen, fibrin, and pigment granules.
• Spicule-like crystals, identified as calcium phosphates, were found between cells in glial membranes.

Conclusions:

• Epiretinal membranes exhibit diverse cellular compositions, including glial cells and reactive cells.
• The presence of calcium phosphate crystals in ERMs warrants further investigation.
• These findings contribute to understanding the pathogenesis of epiretinal membranes in retinal detachment.