Glyt-1 expression in cultured human Müller cells and intact retinae.

In this study, we demonstrate that Müller cells cultured from human retinas are capable of strongly expressing the glycine transporter Glyt-1 as assessed by immunocytochemistry. By contrast, intact normal and pathological human retinas exhibit Glyt-1 immunoreactivity only in neurons. These data suggest that Glyt-1 expression in cultured Müller cells is an epiphenomenon associated with culturing in vitro, rather than a normal physiological or even pathophysiological phenomenon in vivo.