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Effect of LPS in the absence or presence of melatonin on retinal GFAP immunoreactivity. At 8 days after the injection, LPS increased GFAP (+) immunoreactivity in Müller cell bodies and processes, whereas both treatments with melatonin reduced GFAP immunoreactivity, showing only few positive Müller cells in the Mel 24 h group. Shown are photomicrographs representative of four animals per group. Scale bar: 50 μm.
