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Differential developmental deficits in retinal function in the absence of either protein tyrosine sulfotransferase-1 or -2. | LitMetric

AI Article Synopsis

Article Abstract

To investigate the role(s) of protein-tyrosine sulfation in the retina and to determine the differential role(s) of tyrosylprotein sulfotransferases (TPST) 1 and 2 in vision, retinal function and structure were examined in mice lacking TPST-1 or TPST-2. Despite the normal histologic retinal appearance in both Tpst1(-/-) and Tpst2(-/-) mice, retinal function was compromised during early development. However, Tpst1(-/-) retinas became electrophysiologically normal by postnatal day 90 while Tpst2(-/-) mice did not functionally normalize with age. Ultrastructurally, the absence of TPST-1 or TPST-2 caused minor reductions in neuronal plexus. These results demonstrate the functional importance of protein-tyrosine sulfation for proper development of the retina and suggest that the different phenotypes resulting from elimination of either TPST-1 or -2 may reflect differential expression patterns or levels of the enzymes. Furthermore, single knock-out mice of either TPST-1 or -2 did not phenocopy mice with double-knockout of both TPSTs, suggesting that the functions of the TPSTs are at least partially redundant, which points to the functional importance of these enzymes in the retina.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3382163PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0039702PLOS

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