首页> 外文期刊>Pharmacology, Biochemistry and Behavior >Isobolographic assessment of the effects of combinations of phenylpropanolamine and fenfluramine on food intake in rats.
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Isobolographic assessment of the effects of combinations of phenylpropanolamine and fenfluramine on food intake in rats.

机译:等效线描记法评估苯丙醇胺和芬氟拉明对大鼠食物摄入的影响。

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摘要

Phenylpropanolamine (PPA) suppresses appetite in rats via activation of alpha 1-adrenergic receptors within the paraventricular hypothalamus (PVN). The serotonergic (5-HT) agonist fenfluramine (FEN) is thought to suppress appetite via stimulation of 5-HT release within the PVN rather than activation of adrenergic receptors. Whether a mixture of these neurochemically distinct anorexic drugs will serve as an effective appetite suppressant is unknown. In the present experiment, drug-drug interactions between PPA and FEN were explored using an isobologram technique. Fixed doses of PPA (0 vs. 5 mg/kg) were combined with various doses of FEN (1.25, 2.5, and 5.0 mg/kg) and fixed doses of FEN (0 vs. 2.5 mg/kg) were combined with various doses of PPA (0, 5, 10, and 15 mg/kg). Drug combinations were injected IP 30 min before a 1-h feeding trial in 16-h food-deprived rats. PPA and FEN were dose-additive in this paradigm, an outcome that supports the feasibility of a new appetite suppressant composed of a mixture of PPA and FEN.
机译:苯丙醇胺(PPA)通过激活脑室下丘脑(PVN)中的α1-肾上腺素能受体来抑制食欲。血清素能(5-HT)激动剂芬氟拉明(FEN)被认为可以通过刺激PVN中的5-HT释放而不是激活肾上腺素受体来抑制食欲。这些神经化学上不同的厌食药的混合物是否可以作为有效的食欲抑制剂尚不清楚。在本实验中,使用等效线图技术探索了PPA和FEN之间的药物相互作用。固定剂量的PPA(0 vs. 5 mg / kg)与各种剂量的FEN(1.25、2.5和5.0 mg / kg)结合,固定剂量的FEN(0 vs. 2.5 mg / kg)与各种剂量的结合PPA(0、5、10和15 mg / kg)。在16小时食物匮乏的大鼠进行1小时喂养试验之前,在30分钟IP注射药物组合。 PPA和FEN在此范例中是剂量加性的,这一结果支持了由PPA和FEN的混合物组成的新型食欲抑制剂的可行性。

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