[Age-dependent expression of HSP90 in the hippocampus of APP/PS1 mice].

Q3 Medicine
生理学报 Pub Date : 2024-04-25
Bing-Yi Wang, Si-Yu Liu, Kai-Min Hao, Wen-Xiu Qi
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引用次数: 0

Abstract

The present study aims to observe the change in expression of heat shock protein 90 (HSP90) along with amyloid-β (Aβ) and phosphorylated Tau (p-Tau) protein levels in the hippocampus tissue of Alzheimer's disease (AD) transgenic animal model with age. APP/PS1 transgenic mice at age of 6-, 9- and 12-month and C57BL/6J mice of the same age were used. The cognitive abilities of these animals were evaluated using a Morris water maze. Western blot or immunohistochemistry was used to detect the expressions of HSP90 and Aβ1-42, as well as the phosphorylation levels of Tau protein in the hippocampus. The hsp90 mRNA levels and the morphology and number of cells in the hippocampus were detected with real-time quantitative polymerase chain reaction (qRT-PCR) and Nissl staining, respectively. The results showed that compared with C57BL/6J mice of the same age, HSP90 and hsp90 mRNA expression were decreased (P < 0.05 or P < 0.01), while Aβ1-42 and p-Tau protein levels were increased (P < 0.05 or P < 0.01) in the hippocampal tissue of APP/PS1 transgenic mice. Meanwhile, the decrease in HSP90 and hsp90 mRNA expression (P < 0.05 or P < 0.01), the increase in Aβ1-42 and p-Tau levels (P < 0.01 or P < 0.05) in hippocampal tissue and the reduction in behavioral ability showed a progressive development with the advancing of age in the APP/PS1 transgenic mice. In conclusion, in the hippocampal tissue of APP/PS1 mice, the decrease in HSP90 expression and the increase in Aβ1-42 and p-Tau levels together with the decline of their cognitive ability are age-dependent.

[APP/PS1小鼠海马中HSP90的表达随年龄变化]。
本研究旨在观察阿尔茨海默病(AD)转基因动物模型海马组织中热休克蛋白90(HSP90)的表达以及淀粉样蛋白-β(Aβ)和磷酸化Tau(p-Tau)蛋白水平随年龄的变化。研究对象为6、9和12月龄的APP/PS1转基因小鼠以及同龄的C57BL/6J小鼠。这些动物的认知能力通过莫里斯水迷宫进行评估。用 Western 印迹法或免疫组化法检测海马中 HSP90 和 Aβ1-42 的表达以及 Tau 蛋白的磷酸化水平。实时定量聚合酶链式反应(qRT-PCR)和Nissl染色分别检测了海马中hsp90 mRNA的水平以及细胞的形态和数量。结果显示,与同龄的C57BL/6J小鼠相比,APP/PS1转基因小鼠海马组织中HSP90和hsp90 mRNA表达量减少(P<0.05或P<0.01),而Aβ1-42和p-Tau蛋白水平升高(P<0.05或P<0.01)。同时,随着年龄的增长,APP/PS1转基因小鼠海马组织中HSP90和hsp90 mRNA表达量减少(P<0.05或P<0.01),Aβ1-42和p-Tau水平升高(P<0.01或P<0.05),行为能力下降。总之,在APP/PS1小鼠的海马组织中,HSP90表达的降低、Aβ1-42和p-Tau水平的升高及其认知能力的下降是年龄依赖性的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
生理学报
生理学报 Medicine-Medicine (all)
CiteScore
1.20
自引率
0.00%
发文量
4820
期刊介绍: Acta Physiologica Sinica (APS) is sponsored by the Chinese Association for Physiological Sciences and Shanghai Institutes of Biological Sciences, Chinese Academy of Sciences (CAS), and is published bimonthly by the Science Press, China. APS publishes original research articles in the field of physiology as well as research contributions from other biomedical disciplines and proceedings of conferences and symposia of physiological sciences. Besides “Original Research Articles”, the journal also provides columns as “Brief Review”, “Rapid Communication”, “Experimental Technique”, and “Letter to the Editor”. Articles are published in either Chinese or English according to authors’ submission.
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