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  • Title: Effects of trapidil and trapidil derivatives on arachidonic acid and prostaglandin endoperoxide analogue U 46619-induced blood pressure changes in rats.
    Author: Heinroth-Hoffmann I, Hauser A, Taube C, Mest HJ.
    Journal: Biomed Biochim Acta; 1988; 47(10-11):S145-8. PubMed ID: 3248102.
    Abstract:
    The influence of trapidil (T) and two selected 5,7-disubstituted s-triazolo (1,5-a)pyrimidine derivatives (TD: AR 12456 and AR 12463) on arachidonic acid(AA)- and prostaglandin endoperoxide analogue U 46619-induced blood pressure changes in normotensive rats was investigated in comparison with the cyclooxygenase inhibitor acetylsalicylic acid (ASA) and the thromboxane A2 (TXA2) antagonist BM 13177. ASA and AR 12456 completely eliminated the second blood pressure depression after injection of AA and simultaneously diminished TXA2, TXB2 and 6-keto-PGF1a formation in murine blood, whereas BM 13177 prevented the return of the blood pressure to preinjection level after the initial brief fall in arterial pressure. BM 13177 and AR 12463 reduced the rise in U 46619-provoked blood pressure by 75% and 58%, respectively. Trapidil had no effect on blood pressure changes stimulated by AA and U 46619.
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