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Comparison of Plasma Lipoprotein Composition and Function in Cerebral Amyloid Angiopathy and Alzheimer’s Disease

机译:血浆脂蛋白组合物的比较及在脑淀粉样血管病和阿尔茨海默病中的作用

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摘要

Cerebral amyloid angiopathy (CAA) refers to beta-amyloid (Aβ) deposition in brain vessels and is clinically the main cause of lobar intracerebral hemorrhage (ICH). Aβ can also accumulate in brain parenchyma forming neuritic plaques in Alzheimer’s disease (AD). Our study aimed to determine whether the peripheral lipid profile and lipoprotein composition are associated with cerebral beta-amyloidosis pathology and may reflect biological differences in AD and CAA. For this purpose, lipid and apolipoproteins levels were analyzed in plasma from 51 ICH-CAA patients (collected during the chronic phase of the disease), 60 AD patients, and 60 control subjects. Lipoproteins (VLDL, LDL, and HDL) were isolated and their composition and pro/antioxidant ability were determined. We observed that alterations in the lipid profile and lipoprotein composition were remarkable in the ICH-CAA group compared to control subjects, whereas the AD group presented no specific alterations compared with controls. ICH-CAA patients presented an atheroprotective profile, which consisted of lower total and LDL cholesterol levels. Plasma from chronic ICH-CAA patients also showed a redistribution of ApoC-III from HDL to VLDL and a higher ApoE/ApoC-III ratio in HDL. Whether these alterations reflect a protective response or have a causative effect on the pathology requires further investigation.
机译:脑淀粉样血管病(CAA)是指脑血管中的β-淀粉样蛋白(Aβ)沉积,在临床上是肺叶脑出血(ICH)的主要原因。 Aβ还可以在阿尔茨海默病(AD)中形成神经炎神经炎斑块的脑实质中。我们的研究旨在确定外周血脂型和脂蛋白组合物是否与脑β-淀粉样蛋白病理学有关,并反映AD和CAA的生物差异。为此目的,在51伊希-CAA患者(疾病慢性阶段收集),60名AD患者和60名对照受试者,在血浆中分析脂质和载脂蛋白水平。分离脂蛋白(VLDL,LDL和HDL),并测定它们的组成和PRO /抗氧化能力。我们观察到,与对照对象相比,ICH-CAA组中,脂质型材和脂蛋白组合物的改变显着,而AD组与对照相比没有具体的改变。 Ich-Caa患者呈现出一种动脉保护性剖面,其包括较低的总和LDL胆固醇水平。来自慢性ICH-CAA患者的血浆还表现出从HDL到VLDL的APOC-III和HDL中较高的APOE / APOC-III比率的再分布。这些改变是否反映了保护反应或对病理学的致病效果需要进一步调查。

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