Nootropic and Antihypoxic Properties of Novel Derivatives of 1,2-Dihydro-3H-1,4-Benzodiazepin-2-one
作者:S. A. Andronati、T. L. Karaseva、Ya. R. Krivenko、V. I. Pavlovsky、O. V Onufrienko、A. A. Shandra
DOI:10.1007/s11062-018-9703-9
日期:2017.12
Among eight recently synthesized 3-phthalimidoacyloxy- and phthalimidoacyloxyethoxy-1,2-dihydro-3H-1,4-benzodiazepin-2-ones, three compounds that enhanced the indices of cognitive functions in albino rats by 24-43%, as compared with those in control animals, were found. In the Morris water maze test, these agents used in doses of 10 mg/kg positively influenced the index of long-term memory in contrast to the hormone leptin (10 nM) that enhanced the index of short-term memory but did not influence long-term memory. Pyracetam enhanced the indices of both short-term memory and long-term memory, but only in a much greater dose (400 mg/kg). Injections of the above-mentioned three tested compounds into rats resulted in a decrease in the power of the delta EEG rhythm and also in rises in the powers of theta and (especially) beta oscillations. All eight tested compounds (in doses 10 mg/kg) demonstrated clearly pronounced antihypoxic effects under conditions of acute hypoxia in a closed space test in experiments on mice. Two compounds showed the maximum efficiency; those increased the survival time of mice by 76% and 50%, respectively, as compared with the control. Therefore, the eight tested compounds demonstrate, along with high antihypoxic efficiency, a specific aspect of pharmacological activity somewhat unusual for benzodiazepins; these compounds improve the long-term memory and learning capability and exert specific effects on the EEG characteristics. These compounds are characterized by low toxicity; their LD50 exceeds 550 mg/kg.
在最近合成的八种3-邻苯二甲酰亚胺酰氧基和邻苯二甲酰亚胺酰氧基乙氧基-1,2-二氢-3H-1,4-苯二氮䓬-2-酮中,有三种化合物在与对照组动物相比时,提高了白化大鼠的认知功能指数24-43%。在莫里斯水迷宫测试中,这些以10 mg/kg剂量使用的药物对长期记忆指数产生了积极影响,而激素瘦素(10 nM)则增强了短期记忆指数,但对长期记忆没有影响。吡拉西坦增强了短期记忆和长期记忆的指数,但需要更大的剂量(400 mg/kg)。上述三种经过测试的化合物注射到大鼠中,导致δ脑电图节律的强度下降,同时θ波和(特别是)β波的强度上升。所有八种测试化合物(剂量10 mg/kg)在小鼠的急性缺氧闭合空间试验中显示出明显的抗缺氧作用。两种化合物表现出最大的效率,分别使小鼠的生存时间提高了76%和50%,与对照组相比。因此,这八种测试化合物不仅显示出高效的抗缺氧效果,还展现出一种对苯二氮䓬类药物而言稍显独特的药理活性;这些化合物改善了长期记忆和学习能力,并对脑电图特征产生了特定影响。这些化合物具有低毒性,其LD50超过550 mg/kg。