Stroke:血脑屏障渗漏和微血管病变与脑-淀粉样血管病造成的脑损伤有关

2019-02-17 不详 MedSci原创

脑淀粉样血管病(CAA)是一种常见的小血管疾病,可影响老年人的认知。 但是目前对于CAA和CAA相关出血的病理生理学机理仍然知之甚少。在本项研究中研究人员探讨了血脑屏障渗漏是否与CAA和微血管病变相关。

背景和目的
脑淀粉样血管病(CAA)是一种常见的小血管疾病,可影响老年人的认知。 但是目前对于CAA和CAA相关出血的病理生理学机理仍然知之甚少。在本项研究中研究人员探讨了血脑屏障渗漏是否与CAA和微血管病变相关。

方法
研究人员纳入了11例CAA病例,其中8例是男性。从所有患者的每个脑叶皮质中取样并切片,并用免疫组织化学评估IgG和纤维蛋白外渗(血脑屏障渗漏的标志物)。研究人员假设与对照组相比,CAA病例中IgG和纤维蛋白外渗会增加且枕大脑区更为明显,并用离体磁共振成像分辨大脑微出血和脑微小梗死的数量。

结果
结果表明,与对照组相比,CAA病例的额颞叶(P = 0.044)和枕叶(P = 0.001)皮质中IgG阳性率增加。在CAA病例中,与额颞部脑区相比,枕叶脑区的纤维蛋白和IgG阳性均增加(分别为P = 0.005和P = 0.006)。纤维蛋白和IgG的阳性血管百分比与淀粉样蛋白-β阳性血管的百分比相关(Spearmanρ= 0.71,P = 0.015,Spearmanρ= 0.73,P = 0.011)。此外,纤维蛋白和IgG阳性血管,而非淀粉样蛋白-β阳性血管的百分比与磁共振成像中的脑微出血数量相关(Spearmanρ= 0.77,P = 0.005和Spearmanρ= 0.70,P =分别为0.017)。最后,研究人员在脑微出血的血管壁中观察到纤维蛋白沉积。

结论
本项研究结果指出血脑屏障渗漏可能是CAA相关脑损伤的原因。

原始出处:

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    2019-02-19 mgqwxj
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