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SIRT1 activation by resveratrol reverses atrophy of apical dendrites of hippocampal CA1 pyramidal neurons and neurobehavioral impairments in moderate grade hepatic encephalopathy rats
Journal of Chemical Neuroanatomy ( IF 2.8 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.jchemneu.2020.101797
Archita Khanna 1 , Anamika 1 , Suwarna Chakraborty 2 , Sunil Jamuna Tripathi 2 , Arup Acharjee 1 , Shankaranarayana Rao Bs 2 , Surendra K Trigun 1
Affiliation  

A preliminary observation about resveratrol (RSV) dependent normalization of inflammatory and apoptotic factors in the cortex of hyperammonemic rat model of moderate grade hepatic encephalopathy (MoHE) led us to evaluate whether RSV is ultimately able to confer neuroprotection against MoHE pathogenesis and that it does so by activating its bonafide molecular target SIRT1. The present study compared the profile of relevant neurobehavioral pattern vs neuromorphometry of hippocampal CA1 neurons and SIRT1 activity in the hippocampus of the chronic liver failure (CLF) model of moderate grade HE (MoHE) rats induced by administration of 100 mg/kg body weight of thioacetamide i.p. for 10 days and in the CLF/MoHE rats treated with 10 mg/kg body weight RSV i.p. for 7 days. As compared to the control group rats, the MoHE rats showed significantly deranged pattern of memory and motor functions on MWM and rota rod tests, respectively. These behavioural deficits were associated with a significant reduction in apical dendrite length and number of branching points in the CA1 pyramidal neurons. Interestingly, all these parameters were found to be recovered back to their normal levels in the MoHE rats treated with RSV. Concordantly, MoHE associated declined SIRT1 activity in the hippocampus could be normalized back due to RSV treatment to those MoHE rats. Our findings suggest that RSV is able to normalize MoHE associated memory impairments and motor deficits vis a vis reversal of CA1 dendritic atrophy via SIRT1 activation.

中文翻译:

白藜芦醇激活 SIRT1 逆转中度肝性脑病大鼠海马 CA1 锥体神经元顶端树突萎缩和神经行为障碍

对中度肝性脑病 (MoHE) 高氨血症大鼠模型皮层中白藜芦醇 (RSV) 依赖性炎症和凋亡因子的正常化的初步观察使我们评估 RSV 是否最终能够赋予针对 MoHE 发病机制的神经保护作用,并且确实如此通过激活其真正的分子靶标 SIRT1。本研究比较了中度 HE (MoHE) 大鼠慢性肝衰竭 (CLF) 模型海马中海马 CA1 神经元的相关神经行为模式与神经形态计量学的特征以及 SIRT1 活性,该模型由给予 100 mg/kg 体重的硫代乙酰胺 ip 10 天,并在 CLF/MoHE 大鼠中使用 10 mg/kg 体重 RSV ip 治疗 7 天。与对照组大鼠相比,MoHE 大鼠分别在 MWM 和旋转棒测试中显示出显着的记忆和运动功能紊乱模式。这些行为缺陷与 CA1 锥体神经元中顶端树突长度和分支点数量的显着减少有关。有趣的是,发现所有这些参数在用 RSV 治疗的 MoHE 大鼠中恢复到正常水平。一致地,由于对那些 MoHE 大鼠进行 RSV 治疗,MoHE 相关的海马 SIRT1 活性下降可以恢复正常。我们的研究结果表明,通过 SIRT1 激活逆转 CA1 树突状萎缩,RSV 能够使 MoHE 相关的记忆障碍和运动障碍正常化。这些行为缺陷与 CA1 锥体神经元中顶端树突长度和分支点数量的显着减少有关。有趣的是,发现所有这些参数在用 RSV 治疗的 MoHE 大鼠中恢复到正常水平。一致地,由于对那些 MoHE 大鼠进行 RSV 治疗,MoHE 相关的海马 SIRT1 活性下降可以恢复正常。我们的研究结果表明,通过 SIRT1 激活逆转 CA1 树突状萎缩,RSV 能够使 MoHE 相关的记忆障碍和运动障碍正常化。这些行为缺陷与 CA1 锥体神经元中顶端树突长度和分支点数量的显着减少有关。有趣的是,发现所有这些参数在用 RSV 治疗的 MoHE 大鼠中恢复到正常水平。一致地,由于对那些 MoHE 大鼠进行 RSV 治疗,MoHE 相关的海马 SIRT1 活性下降可以恢复正常。我们的研究结果表明,通过 SIRT1 激活逆转 CA1 树突状萎缩,RSV 能够使 MoHE 相关的记忆障碍和运动障碍正常化。由于对那些 MoHE 大鼠进行 RSV 治疗,MoHE 相关的海马 SIRT1 活性下降可以恢复正常。我们的研究结果表明,通过 SIRT1 激活逆转 CA1 树突状萎缩,RSV 能够使 MoHE 相关的记忆障碍和运动障碍正常化。由于对那些 MoHE 大鼠进行 RSV 治疗,MoHE 相关的海马 SIRT1 活性下降可以恢复正常。我们的研究结果表明,通过 SIRT1 激活逆转 CA1 树突状萎缩,RSV 能够使 MoHE 相关的记忆障碍和运动障碍正常化。
更新日期:2020-07-01
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