Dopaminergic neurons in the rat retina express dopamine D2/3 receptors

The European Journal of Neuroscience
M L Veruki

Abstract

The localization of dopamine D2 and D3 receptors in the rat retina was studied using a polyclonal antibody raised against a peptide sequence common to the dopamine D2 and D3 receptors (D2/3). The D2/3 receptor antibody labelled a small number of somata in the innermost part of the inner nuclear layer and in the ganglion cell layer and a small number of photoreceptor outer segments. Processes in both plexiform layers were also labelled. Double-labelling experiments with the antibody against the D2/3 receptor and an antibody against tyrosine hydroxylase to label dopaminergic neurons resulted in the co-localization of the two antibodies. This demonstrates directly that dopaminergic neurons in the retina express D2/3 receptors. As previous biochemical and physiological studies have demonstrated that activation of D2-like receptors inhibits the release of dopamine in the retina, the present results suggest that the D2/3 receptors on dopaminergic neurons function as autoreceptors.

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Citations

Sep 24, 1999·Molecular Neurobiology·J Nguyen-LegrosP Vernier
Sep 28, 2004·Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·K-G Schmidt
Mar 1, 2005·Visual Neuroscience·Jianguo XiaoDavid Marshak
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Nov 25, 2021·Journal of Neurophysiology·Michael D Flood, Erika D Eggers

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