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  • Title: Role of I(1)-imidazoline receptors and alpha2-adrenoceptors in hemodynamic effects of moxonidine administration into the rostroventrolateral medulla.
    Author: Khokhlova ON, Murashev AN, Medvedev OS.
    Journal: Bull Exp Biol Med; 2001 Apr; 131(4):336-9. PubMed ID: 11550020.
    Abstract:
    Local injection of 4 nmol moxonidine (unilaterally) into the rostroventrolateral medulla of spontaneously hypertensive rats (SHR-SP) decreased mean blood pressure and heart rate by 24+/-3 and 3+/-4%, respectively. Pretreatment with the I1/alpha2-receptor antagonist efaroxan abolished the moxonidine-induced decrease in mean blood pressure, but had no effect on heart rate. Yohimbine blocked hypotension, delayed bradycardia (8 nmol), or completely inhibited the effects of moxonidine (16 nmol). Our results indicate that both I1-imidazoline receptors and alpha2-adrenoceptors of the rostroventrolateral medulla are involved in the realization of moxonidine-induced changes.
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