RGD Reference Report - Vanilloid receptor like 1 (VRL1) immunoreactivity in mammalian retina: colocalization with somatostatin and purinergic P2X1 receptors. - Rat Genome Database

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Vanilloid receptor like 1 (VRL1) immunoreactivity in mammalian retina: colocalization with somatostatin and purinergic P2X1 receptors.

Authors: Yazulla, S  Studholme, KM 
Citation: Yazulla S and Studholme KM, J Comp Neurol. 2004 Jun 28;474(3):407-18.
RGD ID: 1581710
Pubmed: PMID:15174083   (View Abstract at PubMed)
DOI: DOI:10.1002/cne.20144   (Journal Full-text)

The distribution of vanilloid receptor like1 immunoreactivity (VRL1-IR) in the retinas of rat, cat, and monkey was studied by single- and double-labeling immunocytochemistry. The patterns were similar for all three species in that VRL1-IR was most prominent in the inner plexiform layer, with scattered compact projections to the outer plexiform layer (OPL). VRL1-immunoreactive cell bodies were present throughout the rat retina, represented by amacrine cells in the inner nuclear layer and ganglion cell layer (GCL). In cat and monkey retinas, VRL1-immunoreactive cell bodies were restricted to the GCL in the inferior retina. Occasional cell bodies were associated with retinal blood vessels, but their identity as pericytes, glia, or neurons is uncertain. All VRL1-immunoreactive cells and processes colocalized with somatostatin and purinergic P2X1 receptor-IR but not with tyrosine hydroxylase-IR. VRL1-immunoreactive processes in the OPL did not label with antisera against synaptic vesicle 2 (SV2), suggesting that they were dendritic and did not derive from interplexiform cells. However, VRL1-immunoreactive processes in the far periphery toward the pars plana labeled for SV2, suggesting that these processes were presynaptic. The VRL1-immunoreactive cell bodies in the monkey GCL were not calbindin-immunoreactive, demonstrating that they were not displaced H2 horizontal cells. The VRL1-immunoreactive cells in cat and monkey could represent biplexiform and/or associational ganglion cells that receive input in the OPL throughout the retina and direct output to the far periphery. The presence of P2X1 receptors and vanilloid receptor like 1 protein on somatostatin-containing neurons in mammalian retina adds to the growing complexity regarding the chemical control of retinal function that is likely to include the microcirculation.

Objects referenced in this article
Gene P2rx1 purinergic receptor P2X 1 Rattus norvegicus

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