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Diurnal variation of brain derived neurotrophic factor and its importance

机译:脑源性神经营养因子的日变化及其重要性

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Background: Previous studies have shown the importance of Brain Derived Neurotrophic Factor (BDNF) in different cognitive processes including learning and memory. Some previous studies have showed variations of BDNF protein during the day. But still there is no data that shows any circadian variation of BDNF in the brain of rodents. So, this study was aimed to determine any circadian variation of BDNF protein in brain structures involved in cognitive processes. Methods: Male Arvicanthis ansorgei diurnal rats were sacrificed at different zeitgeber times (ZT21, ZT17, ZT13, ZT9, ZT5 and ZT1). ZT12 and ZT0 defining lights off and on respectively. The brains were removed and brain homogenates were prepared from hippocampus and cortex tissues. The amount of BDNF protein was assessed using ELISA technique on the brain supernatants. Results: Both the structures i.e. cortex and hippocampus showed a circadian variation of BDNF protein. In cortex, two peaks were observed i.e. at ZT5 and ZT17. Post-hoc analysis showed a significant effect between ZT5 and ZT13 (P0.05). Hippocampus, also showed two peaks i.e. at ZT9 and ZT21. Post-hoc analysis showed a significant effect between ZT1 and ZT21 (P0.05). Conclusion: Our novel results showed that both brain structures of diurnal rodents follow a circadian rhythms of BDNF protein. This study provides a focus for designing experiments and techniques that are based logically how circadian rhythms of different proteins contribute in pathology and how we can treat.
机译:背景:先前的研究表明脑源性神经营养因子(BDNF)在不同的认知过程(包括学习和记忆)中的重要性。先前的一些研究表明BDNF蛋白在白天会发生变化。但是仍然没有数据显示啮齿动物大脑中BDNF的昼夜节律变化。因此,本研究旨在确定参与认知过程的脑结构中BDNF蛋白的昼夜节律变化。方法:在不同的时代时间(ZT21,ZT17,ZT13,ZT9,ZT5和ZT1)处死雄性Anvicorgis昼夜大鼠。 ZT12和ZT0定义指示灯分别熄灭和点亮。取出大脑并从海马和皮层组织中制备脑匀浆。使用ELISA技术评估脑上清液中BDNF蛋白的量。结果:皮质和海马的结构均显示出BDNF蛋白的昼夜节律变化。在皮质中,观察到两个峰,即在ZT5和ZT17。事后分析显示ZT5和ZT13之间有显着影响(P <0.05)。海马也显示了两个峰,即ZT9和ZT21。事后分析显示ZT1和ZT21之间有显着影响(P <0.05)。结论:我们的新结果表明,昼间啮齿动物的两个大脑结构都遵循BDNF蛋白的昼夜节律。这项研究为设计实验和技术提供了重点,这些实验和技术在逻辑上基于不同蛋白质的昼夜节律在病理学中的作用以及我们如何治疗。

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