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. 2011 May;65(5):388-92.
doi: 10.1002/syn.20856. Epub 2010 Oct 8.

Distribution of CB2 Cannabinoid Receptor in Adult Rat Retina

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Distribution of CB2 Cannabinoid Receptor in Adult Rat Retina

Ester M López et al. Synapse. .

Abstract

Cannabinoid effects are mediated through two receptors, CB1 and CB2. In the retina CB1 has been reported in bipolar cells, gabaergic amacrine cells, horizontal cells, and inner plexiform layer. CB2 receptor mRNA localization was shown in photoreceptors, inner nuclear layer, and ganglion cell layer by using RT-PCR. The aim of this work was to localize CB2 receptor in the rat retina by using immunocytochemistry. Our results showed that CB2 receptor was localized in retinal pigmentary epithelium, inner photoreceptor segments, horizontal and amacrine cells, cells localized in ganglion cell layer, and in fibers of inner plexiform layer. These results are in agreement with studies using RT-PCR and provide some additional information about the distribution of CB2 receptor. Further studies are needed to clarify the role of this cannabinoid receptor in the retina.

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