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- W1991221605 abstract "We describe the regulation mechanisms of the Na+-dependent neutral amino acid transporter ASCT2 via nitric oxide (NO) in the human intestinal cell line, Caco-2. Exposure of Caco-2 cells to S-nitrosothiol, such as S-nitroso-N-acetyl-dl-penicillamine (SNAP) and S-nitrosoglutathione, and the NO-donor, NOC12, concentration- and time-dependently increased Na+-dependent alanine uptake. Kinetic analyses indicated that SNAP increases the maximal velocity (V max) of Na+-dependent alanine uptake in Caco-2 cells without affecting the Michaelis–Menten constant (K t). The stimulatory effect was partially eliminated by actinomycin D and cycloheximide. Increased Na+-dependent alanine uptake by SNAP was partially abolished by the NO scavengers, 2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl 3-oxide sodium salt (carboxy-PTIO) and N-(dithiocarboxy)sarcosine disodium salts (DTCS), as well as the NADPH oxidase inhibitor, diphenyleneiodonium. RT-PCR revealed that Caco-2 cells expressed the Na+-dependent neutral amino acid transporter ASCT2, but not the other Na+-dependent neutral amino acid transporters ATB0,+ and B0AT1. These results suggested that functional up-regulation of ASCT2 by SNAP might be partially associated with an increase in the density of transporter protein via de novo synthesis." @default.
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- W1991221605 date "2005-04-07" @default.
- W1991221605 modified "2023-09-26" @default.
- W1991221605 title "Functional regulation of Na<sup>+</sup>-dependent neutral amino acid transporter ASCT2 by<i>S</i>-nitrosothiols and nitric oxide in Caco-2 cells" @default.
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- W1991221605 doi "https://doi.org/10.1016/j.febslet.2005.03.065" @default.
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