Figure 1. Expression of retinal glial cell marker genes in Moorfields/Institute of Ophthalmology-Müller 1 (MIO-M1) cells. The expression of the following genes was determined with reverse-transcription PCR: glutamine synthetase (GLUL), vimentin (VIM), glial fibrillary acidic protein (GFAP), cellular retinaldehyde-binding protein (RLBP1), the glial high-affinity glutamate transporter (SLC1A), aquaporin-4 (AQP4), and the inwardly rectifying potassium channel Kir4.1 (Kir4.1), and β-actin (ACTB). The data from two independent experiments (1, 2) are shown. The negative control (-) was done by adding double-distilled water instead of cDNA.