The astrocytes (2.5 × 105 cells/well) were cultured in normal glucose (5.5 mM) and high glucose (25 mM) DMEM (10% FBS) to a monoconfluent layer in 6-well cell culture plates. Using sterile 200 µl pipette tip scratches were made on the cell layer, the plates were then rinsed with sterile PBS to remove cell debris and replaced with fresh cell culture media. At 0, 24 and 48 hrs after scratch, cells were stained with Calcein AM (10 µM), fluorescent images were obtained randomly using a Zeiss fluorescence microscope.
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