Journal
MICROSCOPY RESEARCH AND TECHNIQUE
Volume 86, Issue 4, Pages 439-451Publisher
WILEY
DOI: 10.1002/jemt.24284
Keywords
coculture; GFAP; HUVECs; MIO-M1 cells; oxidative stress
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The aim of this study was to optimize a coculture in vitro model between human Muller glial cells and human umbilical vein endothelial cells to mimic the inner blood-retinal barrier and assess its resistance to oxidative stress-induced damage. The coculture maintained distinct cell types and tight cell-cell junctions up to the 8th passage, but only acquired a slight resistance to oxidative stress induction over passages. The MIO-M1/HUVECs coculture is a simple, reproducible, and affordable model for studying oxidative stress-induced retinal damages in vitro.
The aim of this study was to optimize a coculture in vitro model established between the human Muller glial cells and human umbilical vein endothelial cells, mimicking the inner blood-retinal barrier, and to explore its resistance to damage induced by oxidative stress. A spontaneously immortalized human Muller cell line MIO-M1 and human umbilical vein endothelial cells (HUVEC) were plated together at a density ratio 1:1 and maintained up to the 8th passage (p8). The MIO-M1/HUVECs p1 through p8 were treated with increasing concentrations (range 200-800 mu M) of H2O2 to evaluate oxidative stress induced damage and comparing data with single cell cultures. The following features were assayed p1 through p8: doubling time maintenance, cell viability using MTS assay, ultrastructure of cell-cell contacts, immunofluorescence for Vimentin and GFAP, molecular biology (q-PCR) for GFAP and CD31 mRNA. MIO-M1/HUVECs cocultures maintained distinct cell cytotype up to p8 as shown by flow cytometry analysis, without evidence of cross activation, displaying cell-cell tight junctions mimicking those found in human retina, only acquiring a slight resistance to oxidative stress induction over the passages. This MIO-M1/HUVECs coculture represents a simple, reproducible and affordable model for in vitro studies on oxidative stress-induced retinal damages.
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