南方医科大学学报2024，Vol.44Issue(3)：447-454,8.DOI:10.12122/j.issn.1673-4254.2024.03.05
黄蒲通窍胶囊改善Wilson病铜负荷大鼠的认知损害:基于抑制内质网应激介导的凋亡途径
Huangpu Tongqiao Capsule improves cognitive impairment in rats with Wilson disease by inhibiting endoplasmic reticulum stress-mediated apoptosis pathway
摘要
Abstract
Objective To investigate the neuroprotective effect of Huangpu Tongqiao Capsule(HPTQ)in a rat model of Wilson disease(WD)and explore the underlying mechanisms.Methods SD rat models of WD were established by feeding of copper-supplemented chow diet and drinking water for 12 weeks,and starting from the 9th week,the rats were treated with low-,moderate-and high-dose HPTQ,penicillamine,or normal saline by gavage on a daily basis for 3 weeks.Copper levels in the liver and 24-h urine of the rats were detected,and their learning and memory abilities were evaluated using Morris water maze test.HE staining was used to observe morphological changes of CA1 region neurons in the hippocampus,and neuronal apoptosis was detected with TUNEL staining.Hippocampal expressions of endoplasmic reticulum stress(ERS)-mediated apoptosis pathway-related proteins GRP78,CHOP,caspase-12,cleaved caspase-9,and cleaved caspase-3 at both the mRNA and protein levels were detected using RT-qPCR,immunofluorescence assay or Western blotting.Results Compared with normal control rats,the rat models with copper overload-induced WD exhibited significantly increased copper levels in both the liver and 24-h urine,impaired learning and memory abilities,obvious hippocampal neuronal damage in the CA1 region and increased TUNEL-positive neurons(P<0.01),with also lowered mRNA and protein expressions of GRP78,CHOP,caspase-12,cleaved caspase-9,and cleaved caspase-3 in the hippocampus(all P<0.01).Treatments with HPTQ and penicillamine significantly lowered copper level in the liver but increased urinary copper level,improved learning and memory ability,alleviated neuronal damage and apoptosis in the hippocampus,and decreased hippocampal expressions of GRP78,CHOP,caspase-12,cleaved caspase-9,and cleaved caspase-3 in the rat models(P<0.01 or 0.05).Conclusion HPTQ Capsule has neuroprotective effects in rat models of WD possibly by inhibiting ERS-mediated apoptosis pathway.关键词
Wilson病/黄蒲通窍胶囊/认知损害/内质网应激/凋亡Key words
Wilson disease/Huangpu Tongqiao Capsule/cognitive impairment/endoplasmic reticulum stress/apoptosis引用本文复制引用
张笑颜,王谢,王杰,邵楠,蔡标,谢道俊..黄蒲通窍胶囊改善Wilson病铜负荷大鼠的认知损害:基于抑制内质网应激介导的凋亡途径[J].南方医科大学学报,2024,44(3):447-454,8.基金项目
国家自然科学基金(81874389)Supported by National Natural Science Foundation of China(81874389). （81874389）
