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Hypotensive and Bradycardic Effects of dl-Tetrahydropalmatine Mediated by Decrease in Hypothalamic Serotonin Release in the Rat

机译:降低下丘脑5-羟色胺释放所介导的dl-四氢巴马汀的降压和心动过缓作用

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References(15) Cited-By(7) In anesthetized rats, intravenous administration of dl-tetrahydropalmatine (dl-THP, 1-10 mg/kg) elicited proportional hypotension, bradycardia and decreases in hypothalamic serotonin (5-HT) release (measured by carbon-fiber electrodes in combination with voltammetry). In addition, postsynaptic blockade of 5-HT2 receptors with cyproheptadine (2-5 mg/kg, i.v.) or ketanserin (2-5 mg/kg, i.v.) produced both hypotension and bradycardia, while stimulation of 5-HT2 receptors with 1-(2, 5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI) (10-250 mg/kg, i.v.) produced both hypertension and tachycardia. The dl-THP-induced hypotension and bradycardia could be reversed by DOI treatment. The data indicate that dl-THP decreases both arterial pressure and heart rate through a serotonergic release process in the hypothalamus.
机译:参考文献(15)被引用(7)在麻醉的大鼠中,静脉内注射dl-四氢巴马汀(dl-THP,1-10 mg / kg)引起比例低血压,心动过缓和下丘脑5-羟色胺(5-HT)释放的降低(已测量)碳纤维电极与伏安法结合使用)。此外,用赛庚啶(2-5 mg / kg,静脉内)或酮色林(2-5 mg / kg,静脉内)对5-HT2受体进行突触后阻断会产生低血压和心动过缓,而用1-刺激了5-HT2受体。 (2,5-二甲氧基-4-碘苯基)-2-氨基丙烷(DOI)(10-250 mg / kg,iv)产生高血压和心动过速。 dl-THP引起的低血压和心动过缓可以通过DOI治疗来逆转。数据表明dl-THP通过下丘脑的血清素能释放过程降低动脉压和心率。

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