The amino acid glycine is an inhibitory neurotransmitter in the spinal cord, brain stem, and vertebrate retina. The effective synaptic concentrations of glycine are regulated by at least two transporters: glycine transporter 1 and glycine transporter 2. Here, we show retinal expression of glycine transporter 1 by in-situ hybridization and of glycine transporter 2 by reverse transcriptase-PCR and in-situ hybridization. In-situ hybridization signals were observed in the ganglionar and inner nuclear layer as well as in the outer nuclear layer of the frog and rat retinas. In addition, accumulation of 3 H-glycine was observed in isolated photoreceptor cells. The expression of these transporters in nonglycinergic cells suggests that they may also modulate electrical signals. NeuroReport 19:1295-1299 (c) 2008 Wolters Kluwer Health vertical bar Lippincott Williams & Wilkins.
Última actualización: 23/03/2018