Mechanism of Anmeidan in Ameliorating Cognitive Impairment in Geriatric Sleep Deprivation Model Based on Cyt C Signaling Pathway on Apoptosis
10.13422/j.cnki.syfjx.20241104
- VernacularTitle:基于Cyt C调节细胞凋亡途径探讨安寐丹改善老年睡眠剥夺模型致认知损伤的作用机制
- Author:
Junlu ZHANG
1
;
Kang SUN
1
;
Yixuan WU
1
;
Ping WANG
2
;
Guangjing XIE
2
Author Information
1. School of Basic Medical Sciences，Hubei University of Chinese Medicine，Wuhan 430065，China
2. Ministry of Education Engineering Research Centre of Chinese Medicine Protection Technology and New Product Development for Elderly Brain Health，Hubei University of Chinese Medicine， Wuhan 430065，China
- Publication Type:Journal Article
- Keywords:
Anmeidan;
geriatric sleep deprivation;
apoptosis;
mitochondria;
cytochrome C （Cyt C） signaling pathway
- From:
Chinese Journal of Experimental Traditional Medical Formulae
2024;30(19):1-9
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo investigate the effects of Anmeidan （AMD） on cognitive function， cytochrome C （Cyt C） signaling pathway protein expression， and apoptosis in a geriatric sleep deprivation model. MethodSixty aged C57 mice were randomly divided into a blank group， a model group， AMD high， medium， and low dose （26.26， 13.13， 6.565 g·kg-1·d-1） groups， and a melatonin group （1.3 mg·kg-1·d-1）， with 10 mice in each group. Continuous sleep deprivation was performed for 4 weeks using a homemade sleep deprivation box. Cognitive function was assessed using the Morris water maze， and morphological changes in pyramidal cells in the CA1 area of the hippocampus were observed by hematoxylin-eosin （HE） staining and Nissl staining. Transmission electron microscopy was used to observe the mitochondrial morphology and structure of hippocampal neurons. Western blot was used to detect Cyt C， cysteine-aspartate protease-3 （Caspase-3）， cysteine-aspartate protease-9 （Caspase-9）， brain-derived neurotrophic factor （BDNF）， mitochondrial transcription factor A （TFAM）， and voltage-dependent anion channel 1 （VDAC1） protein expression. Immunohistochemistry was used to detect protein expression levels of Cyt C， Caspase-3， and Caspase-9， and immunofluorescence was used to detect the protein expression of B-cell lymphoma 2 （Bcl-2） and Bcl-2-associated X protein （Bax）. ResultCompared with the blank group， the model group showed prolonged platform latency （P<0.01）， reduced number of platform crossings， and reduced time and distance in the target quadrant （P<0.01）. The mitochondrial structure was damaged， with disappearance or breakage of cristae， and increased swelling and deformation. The protein expression levels of Cyt C， Caspase-3， Caspase-9， Bax， and VDAC1 were significantly increased （P<0.01）， while BDNF， TFAM， and Bcl-2 protein expression levels were decreased （P<0.01）. Compared with the model group， the AMD high， medium， and low dose groups improved spatial exploration and navigation abilities in geriatric sleep-deprived mice （P<0.05， P<0.01）， alleviated mitochondrial damage， and increased the number of Nissl bodies. Additionally， the expression levels of Cyt C， Caspase-3， Caspase-9， Bax， and VDAC1 proteins were significantly reduced （P<0.05， P<0.01）， while the expression levels of BDNF， TFAM， and Bcl-2 proteins were significantly increased （P<0.05， P<0.01）. ConclusionAMD improved the cognitive function of geriatric sleep-deprived mice， and its effect may be related to the reduction of apoptosis mediated by the Cyt C signaling pathway.
