GFAP expression in the retina after unilateral IRI and Argon inhalation.

<p>Cross-sections of the retinae 7 days after unilateral IRI. In controls with and without immediate Argon 75 Vol% inhalation, GFAP was only positive in Müller cells and astrocytes in the GCL. After ischemia, GFAP was upregulated in Müller cells. Their processes, extending through all retinal layers, became GFAP positive. Scale bar, 50 µm.