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Blood amyloid-β protein isoforms are affected by HIV-1 in a subtype-dependent pattern.
Journal of Neurovirology ( IF 3.2 ) Pub Date : 2019-07-07 , DOI: 10.1007/s13365-019-00783-6
Sérgio M de Almeida 1 , Clea E Ribeiro 1 , Indianara Rotta 1 , Scott Letendre 2 , Michael Potter 2 , Bin Tang 2 , Meiri Batistela 1 , Florin Vaida 2 , Ronald J Ellis 2 ,
Affiliation  

This study aimed to compare serum amyloid processing biomarkers among HIV subtype B (n = 25), HIV subtype C (n = 26), healthy HIV-negative controls (n = 18), and patients with Alzheimer's disease (AD; n = 24). Immunoassays were used to measure main soluble Aβ isoforms Aβ38, Aβ40, Aβ42, and Aβ-total in serum and cerebrospinal fluid (CSF). People living with HIV (PLWH) and HIV(-) samples, including AD samples, were compared for gender and age, while HIV subtypes were compared for nadir CD4 and plasma viral load suppression. CSF/serum ratios of Aβ40, Aβ42, and Aβ-total were lower in HIV-1C group than in HIV-1B group (p = 0.020, 0.025, and 0.050, respectively). In serum, these biomarkers were comparable. Serum Aβ isoforms were significantly lower in PLWH than in AD. Serum Aβ42 levels in PLWH were decreased compared to those in control group, thus similar to Aβ42 alterations in CSF; these results were different from those observed in AD. Impaired cellular immunity, low CD4 cell count (nadir or current) influences serum Aβ metabolism in HIV-1B but not HIV-1C. However, in PLWH overall, but not in individual HIV subtype groups, greater CD4 recovery, calculated as the difference between current and nadir CD4, correlated with Aβ42/Aβ40 ratio in serum (rs 0.246; p = 0.0479). No significant correlation was found with global deficit score (GDS), an index of neurocognitive performance, age, or duration of infection. These findings are consistent with those of subtype-dependent amyloid processing in blood in chronic HIV disease.

中文翻译:

血液淀粉样β蛋白同工型以亚型依赖的方式受HIV-1的影响。

这项研究旨在比较B型亚型(n = 25),C型亚型(n = 26),健康HIV阴性对照(n = 18)和阿尔茨海默氏病(AD; n = 24)患者的血清淀粉样蛋白加工生物标志物)。免疫测定法用于测定血清和脑脊髓液(CSF)中的主要可溶性Aβ亚型Aβ38,Aβ40,Aβ42和Aβ-总含量。比较了感染HIV(PLWH)和HIV(-)样本(包括AD样本)的人的性别和年龄,同时比较了HIV亚型的最低CD4和血浆病毒载量抑制。HIV-1C组的Aβ40,Aβ42和Aβ-总CSF /血清比率低于HIV-1B组(分别为p = 0.020、0.025和0.050)。在血清中,这些生物标记物具有可比性。PLWH中的血清Aβ亚型显着低于AD。与对照组相比,PLWH的血清Aβ42水平降低,因此类似于CSF中的Aβ42改变;这些结果与AD中观察到的结果不同。细胞免疫力受损,CD4细胞计数低(最低或当前)会影响HIV-1B中的血清Aβ代谢,但不会影响HIV-1C。然而,总体上,在艾滋病病毒感染者中,而不是在个别的艾滋病亚型人群中,以当前和最低CD4之间的差异计算的更高的CD4回收率与血清中Aβ42/Aβ40的比例相关(rs 0.246; p = 0.0479)。与总体缺陷评分(GDS)(神经认知表现,年龄或感染持续时间的指标)没有发现显着相关性。这些发现与慢性HIV疾病血液中依赖亚型的淀粉样蛋白加工过程的发现一致。CD4细胞计数低(最低或当前)会影响HIV-1B中的血清Aβ代谢,但不会影响HIV-1C。然而,总体上,在艾滋病病毒感染者中,而不是在个别的艾滋病亚型人群中,以当前和最低CD4之间的差异计算的更高的CD4回收率与血清中Aβ42/Aβ40的比例相关(rs 0.246; p = 0.0479)。与总体缺陷评分(GDS)(神经认知表现,年龄或感染持续时间的指标)没有发现显着相关性。这些发现与慢性HIV疾病血液中依赖亚型的淀粉样蛋白加工过程的发现一致。CD4细胞计数低(最低或当前)会影响HIV-1B中的血清Aβ代谢,但不会影响HIV-1C。然而,总体上,在艾滋病病毒感染者中,而不是在个别的艾滋病亚型人群中,以当前和最低CD4之间的差异计算的更高的CD4回收率与血清中Aβ42/Aβ40的比例相关(rs 0.246; p = 0.0479)。与总体缺陷评分(GDS)(神经认知表现,年龄或感染持续时间的指标)没有发现显着相关性。这些发现与慢性HIV疾病血液中亚型依赖性淀粉样蛋白加工的发现一致。与总体缺陷评分(GDS)(神经认知表现,年龄或感染持续时间的指标)没有发现显着相关性。这些发现与慢性HIV疾病血液中依赖亚型的淀粉样蛋白加工过程的发现一致。与总体缺陷评分(GDS)(神经认知表现,年龄或感染持续时间的指标)没有发现显着相关性。这些发现与慢性HIV疾病血液中依赖亚型的淀粉样蛋白加工过程的发现一致。
更新日期:2020-04-13
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