Article: Synergism between hydrogen sulfide (H(2)S) and nitric oxide (NO) in vasorelaxation induced by stonustoxin (SNTX), a lethal and hypotensive protein factor isolated from stonefish Synanceja horrida venom.
2007 Volume 80, Issue 18, Page(s) 1664–1668
Abstract: ... inhibited SNTX-induced vasorelaxation, indicating that H(2)S may also play a part in the effect of SNTX ... The combined use of L-NAME with PAG or BCA showed that H(2)S and NO act synergistically in effecting SNTX ...
Abstract | Stonustoxin (SNTX) is a 148 kDa, dimeric, hypotensive and lethal protein factor isolated from the venom of the stonefish Synanceja horrida. SNTX (10-320 ng/ml) progressively causes relaxation of endothelium-intact, phenylephrine (PE)-precontracted rat thoracic aortic rings. The SNTX-induced vasorelaxation was inhibited by L-N(G)-nitro arginine methyl ester (L-NAME), suggesting that nitric oxide (NO) contributes to the SNTX-induced response. Interestingly, D, L-proparglyglycine (PAG) and beta-cyano-L-alanine (BCA), irreversible and competitive inhibitors of cystathionine-gamma-lyase (CSE) respectively, also inhibited SNTX-induced vasorelaxation, indicating that H(2)S may also play a part in the effect of SNTX. The combined use of L-NAME with PAG or BCA showed that H(2)S and NO act synergistically in effecting SNTX-induced vasorelaxation. |
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MeSH term(s) | Animals ; Aorta, Thoracic/metabolism ; Cystathionine gamma-Lyase/antagonists & inhibitors ; Enzyme Inhibitors/pharmacology ; Fish Venoms/isolation & purification ; Fish Venoms/pharmacology ; Fishes, Poisonous ; Hydrogen Sulfide/agonists ; Hydrogen Sulfide/metabolism ; Male ; Nitric Oxide/agonists ; Nitric Oxide/metabolism ; Organ Culture Techniques ; Phenylephrine/pharmacology ; Rats ; Rats, Sprague-Dawley ; Vasoconstrictor Agents/pharmacology ; Vasodilation/drug effects |
Chemical Substances | Enzyme Inhibitors ; Fish Venoms ; Vasoconstrictor Agents ; stonustoxin (137803-80-6) ; Phenylephrine (1WS297W6MV) ; Nitric Oxide (31C4KY9ESH) ; Cystathionine gamma-Lyase (EC 4.4.1.1) ; Hydrogen Sulfide (YY9FVM7NSN) |
Language | English |
Publishing date | 2007-04-10 |
Publishing country | Netherlands |
Document type | Journal Article |
ZDB-ID | 3378-9 |
ISSN | 1879-0631 ; 0024-3205 |
ISSN (online) | 1879-0631 |
ISSN | 0024-3205 |
DOI | 10.1016/j.lfs.2007.01.058 |
Database | MEDical Literature Analysis and Retrieval System OnLINE |
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