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Brain l-glutamine (Gln) accumulation and increased activity of the NO/cGMP pathway are immediate consequences of acute exposure to ammonia. This study tested whether excess Gln may influence NO and/or cGMP synthesis. Intrastriatal administration of the glutaminase inhibitor 6-diazo-5-oxo-l-norleucine or the system A-specific Gln uptake inhibitor methylaminoisobutyrate increased microdialysate Gln...
Lubeluzole is a newly designed neuroprotectant which has proved effective in the treatment of experimental stroke in rats, mainly by inhibition of the glutamate-activated NO pathway, but also by counteracting osmotic stress by a mechanism associated with the release of the osmotically active amino acid taurine (Tau). Here we show that lubeluzole administered i.p. decreases by 25% the high (50 mM)...
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