Abstract:
:Mouse gastric fundus strips were relaxed by ultraviolet light (UV) irradiation, exogenous nitric oxide (NO), isoproterenol, S-nitrosoglutathione, S-nitroso-L-cysteine and S-nitroso-N-acetyl-penicillamine. Glutathione did not affect relaxations in response to UV irradiation, exogenous NO and isoproterenol while inhibiting that with S-nitrosoglutathione. L-Cysteine inhibited responses to UV irradiation and exogenous NO, but not in the presence of exogenous Cu(2+)/Zn(2+) superoxide dismutase. However, L-cysteine alone or in combination with Cu(2+)/Zn(2+) superoxide dismutase did not affect the relaxations in response to S-nitroso-L-cysteine. Ethacrynic acid and diamide inhibited photorelaxations but not the relaxations with exogenous NO and isoproterenol. This inhibition was prevented by glutathione, but not by L-cysteine. S-nitrosoglutathione-induced relaxations were abolished by diamide and ethacrynic acid, whereas responses to S-nitroso-L-cysteine and S-nitroso-N-acetyl-penicillamine were only inhibited by ethacrynic acid. These results suggest that S-nitrosoglutathione may, at least in part, be the putative S-nitrosothiol, which is converted to NO in response to UV irradiation in mouse gastric fundus strips.
journal_name
Eur J Pharmacoljournal_title
European journal of pharmacologyauthors
Ogülener N,Ergün Ydoi
10.1016/s0014-2999(02)02098-8keywords:
subject
Has Abstractpub_date
2002-08-30 00:00:00pages
267-75issue
3eissn
0014-2999issn
1879-0712pii
S0014299902020988journal_volume
450pub_type
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