PMID: 24366150Dec 25, 2013Paper

Canine amino acid transport system Xc(-): cDNA sequence, distribution and cystine transport activity in lens epithelial cells

The Journal of Veterinary Medical Science
Takuya MaruoHideharu Ochiai

Abstract

The cystine transport activity of a lens epithelial cell line originated from a canine mature cataract was investigated. The distinct cystine transport activity was observed, which was inhibited to 28% by extracellular 1 mM glutamate. The cDNA sequences of canine cysteine/glutamate exchanger (xCT) and 4F2hc were determined. The predicted amino acid sequences were 527 and 533 amino acid polypeptides, respectively. The amino acid sequences of canine xCT and 4F2hc showed high similarities (>80%) to those of humans. The expression of xCT in lens epithelial cell line was confirmed by western blot analysis. RT-PCR analysis revealed high level expression only in the brain, and it was below the detectable level in other tissues.

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Citations

Feb 5, 2015·The Journal of Veterinary Medical Science·Kikumi OgiharaHideharu Ochiai

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