Title : Mechanisms of potentiation of Angiotensin II-induced contractile response of isolated rat aorta by hydrogen peroxide and tert-butyryl hydroperoxide.

Pub. Date : 2009 Jun

PMID : 20442823






5 Functional Relationships(s)
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1 OBJECTIVE: To study the mechanism involved in hydrogen peroxide (H(2)O(2)) or tert-butyl hydroperoxide (t-BHP)-induced potentiation of the Ang II-mediated contraction of isolated rat thoracic aorta. tert-Butylhydroperoxide angiogenin Rattus norvegicus
2 OBJECTIVE: To study the mechanism involved in hydrogen peroxide (H(2)O(2)) or tert-butyl hydroperoxide (t-BHP)-induced potentiation of the Ang II-mediated contraction of isolated rat thoracic aorta. tert-Butylhydroperoxide angiogenin Rattus norvegicus
3 To explore the probable mechanism of H(2)O(2) and t-BHP-induced potentiation of Ang II-mediated contractile response, different blockers such as losartan (AT(1) receptor blocker; 1 muM), catalase (H(2)O(2) scavenger; 500 U/ml), lercanidipine (L-type calcium channel blocker; 1 muM), geinistein (tyrosine kinase inhibitor; 100 muM), and indomethacin (cyclo-oxygenase inhibitor; 10 muM) were used. tert-Butylhydroperoxide angiogenin Rattus norvegicus
4 CONCLUSION: From the above-mentioned results, we can reasonably conclude that H(2)O(2) and t-BHP potentiated the contraction induced by the Ang II. tert-Butylhydroperoxide angiogenin Rattus norvegicus
5 H(2)O(2)-induced potentiation of Ang II response may be mediated through tyrosine kinase activation and t-BHP through the activation of cyclo-oxygenase enzyme. tert-Butylhydroperoxide angiogenin Rattus norvegicus