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  • Title: Hoe 140 a new potent and long acting bradykinin-antagonist: in vivo studies.
    Author: Wirth K, Hock FJ, Albus U, Linz W, Alpermann HG, Anagnostopoulos H, Henk S, Breipohl G, König W, Knolle J.
    Journal: Br J Pharmacol; 1991 Mar; 102(3):774-7. PubMed ID: 1364852.
    Abstract:
    1. The potency, duration of action and tolerability of Hoe 140, a novel and highly potent bradykinin (BK) antagonist in vitro, has been tested in different in vivo models and compared with the well-known BK antagonist D-Arg-[Hyp2, Thi5,8, D-Phe7]BK. 2. Hoe 140 is highly potent and long acting in inhibiting BK-induced hypotensive responses in the rat. Four hours after s.c. administration of 20 nmol kg-1, inhibition still amounted to 60% whereas the effect of 200 nmol kg-1 of D-Arg-[Hyp2, Thi5,8, D-Phe7]BK was not significant. 3. BK-induced bronchoconstriction in guinea-pigs was strongly inhibited by Hoe 140. The magnitude and duration of inhibition confirmed the findings obtained in the blood pressure experiments in the rat. 4. Carrageenin-induced inflammatory oedema of the rat paw was considerably inhibited at i.v. doses between 0.1 and 1 mg kg-1. 5. In conscious dogs, intravenous doses of 0.01 and 0.1 mg kg-1 of Hoe 140 and D-Arg-[Hyp2, Thi5,8, D-Phe7]BK were well tolerated. At doses of 1 mg kg-1 adverse effects occurred that were attributed to the residual BK agonistic activity of both compounds. 6. Hoe 140 has been shown to be a highly potent and long acting BK antagonist in vivo in different animal species and models. This makes it appropriate to investigate further the physiological and pathophysiological role of BK.
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