Department of Pharmaceutical Chemistry, Bharati Vidyapeeth University, Poona College of Pharmacy, Pune, 411038, India.
Department of Pharmacology, Bharati Vidyapeeth University, Poona College of Pharmacy, Pune, 411038, India.
Biomed Pharmacother. 2017 Sep;93:543-553. doi: 10.1016/j.biopha.2017.06.072. Epub 2017 Jul 4.
The study aimed at the investigation of neuroprotective activity of macerated ethanolic extract of Indian propolis (MEEP) against β-Amyloid 25-35 (Aβ) induced memory impairment in Alzheimer's disease. MEEP was administrated orally to Wistar rats at doses of 100, 200 and 300mg/kg. Behavioral performances were evaluated using morris water maze and radial arm maze. At the end of behavioral study, the brains were removed and antioxidant parameters and brain monoamines were estimated. Further acetylcholinesterase (AchE) inhibition and brain-derived neurotropic factor (BDNF) were evaluated. In addition hematological parameters and histopathological tests were also carried out. In behavioral models, MEEP significantly (P<0.05) reversed the cognitive impairment of β amyloid-induced rats. The antioxidant potential was significantly increased (P<0.05) after administration of MEEP. Malondialdehyde levels were significantly (P<0.01) decreased in brain homogenate after treatment with MEEP extract as compared with diseased control group (group III). MEEP showed dose-dependent AChE inhibition and increased the levels of brain monoamines (P<0.05) as compared with group III. MEEP improved memory deficits by increasing BDNF in plasma (P<0.05). The study concludes that MEEP has anti-Alzheimer potential in rats through multiple mechanisms and further studies are ongoing for fractionation and biological screening.
本研究旨在探讨印度蜂胶(MEEP)的醇提物对β-淀粉样蛋白 25-35(Aβ)诱导的阿尔茨海默病记忆障碍的神经保护活性。MEEP 以 100、200 和 300mg/kg 的剂量口服给予 Wistar 大鼠。使用 Morris 水迷宫和放射臂迷宫评估行为表现。在行为研究结束时,取出大脑并估计抗氧化参数和脑单胺。进一步评估乙酰胆碱酯酶(AchE)抑制和脑源性神经营养因子(BDNF)。此外,还进行了血液学参数和组织病理学检查。在行为模型中,MEEP 显著(P<0.05)逆转了β淀粉样蛋白诱导的大鼠认知障碍。MEEP 给药后抗氧化能力显著增加(P<0.05)。与疾病对照组(第 III 组)相比,MEEP 处理后脑匀浆中的丙二醛水平显著降低(P<0.01)。MEEP 表现出剂量依赖性的 AchE 抑制作用,并增加了脑单胺的水平(P<0.05)与第 III 组相比。MEEP 通过增加血浆中的 BDNF 改善记忆缺陷(P<0.05)。研究结论认为,MEEP 通过多种机制在大鼠中具有抗阿尔茨海默病的潜力,正在进行进一步的分离和生物筛选研究。