RGD Reference Report - Protein kinase C-mediated modulation of glutamate transporter activity in rat retina. - Rat Genome Database

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Protein kinase C-mediated modulation of glutamate transporter activity in rat retina.

Authors: Bull, ND  Wood, JP  Osborne, NN  Barnett, NL 
Citation: Bull ND, etal., Curr Eye Res. 2007 Feb;32(2):123-31.
RGD ID: 1642541
Pubmed: PMID:17364745   (View Abstract at PubMed)
DOI: DOI:10.1080/02713680601139200   (Journal Full-text)

It has previously been shown that inhibitors of protein kinase C (PKC) attenuate retinal glutamate uptake in situ. The aim of the current study was to determine whether PKCdelta-mediated inhibition differentially reduces the transport of glutamate into retinal Muller cells when compared with retinal neurons. The influence of two different types of PKC inhibitors on the uptake of [3H]D-aspartate was therefore compared in the intact retina, mixed retinal cultures, and Muller cell-enriched retinal cultures. It was found that 25 microM of the pan-isoform PKC inhibitor, chelerythrine, reduced [3H]D-aspartate uptake by 78%, 71%, and 68% in isolated retinas, mixed neuronal/glial cultures, and Muller cell-enriched cultures, respectively. Importantly, 20 microM of the PKCdelta-selective inhibitor rottlerin also reduced the uptake of D-aspartate to similar extents in all three systems, and the reductions were statistically similar to those found for the pan-specific PKC inhibitor. Neither pan-isoform nor PKCdelta-selective activators stimulated glutamate uptake in either culture system or the intact retina. The current results suggest that specific PKC inhibitors are quantitatively similar in reducing the uptake of glutamate into retinal neurons and Muller cells.



Gene Ontology Annotations    

Biological Process

Objects Annotated

Genes (Rattus norvegicus)
Prkcd  (protein kinase C, delta)


Additional Information