CD14 ++ CD16 +单核细胞易受HIV-1感染,并能穿过血脑屏障。与 HIV-1B 相比,HIV-1 C 亚型 (HIV-1C) 显示 Tat 蛋白趋化活性降低,这可能会影响单核细胞转运至 CNS。我们假设HIV-1C组脑脊液中单核细胞的比例低于HIV-1B组。我们试图评估 HIV 感染者 (PWH) 和未感染 HIV 者 (PWoH) 以及 HIV-1B 和 -C 亚型之间脑脊液 (CSF) 和外周血 (PB) 中单核细胞比例的差异。通过流式细胞术进行免疫表型分析,对 CD45 + 和 CD64 + 门控区域内的单核细胞进行分析,并将其分为经典型 (CD14 ++ CD16 - )、中间型 (CD14 ++ CD16 + ) 和非经典型 (CD14 low CD16 + )。在 PWH 中,中位 [IQR] CD4 最低点为 219 [32–531] 个细胞/mm 3 ;血浆 HIV RNA (log 10 ) 为 1.60 [1.60–3.21],68% 正在接受抗逆转录病毒治疗 (ART)。患有 HIV-1C 和 -B 的参与者在年龄、感染持续时间、CD4 最低值、血浆 HIV RNA 和 ART 方面具有可比性。 HIV-1C 患者的 CSF CD14 ++ CD16 +单核细胞比例高于 HIV-1B 患者 [分别为 2.00(0.00–2.80) vs. 0.00(0.00–0.60),BH 校正后 p = 0.03 p = 0.10 ]。尽管病毒受到抑制,但由于 CD14 ++ CD16 +和 CD14低CD16 +单核细胞的增加,PB 中单核细胞总数的比例在 PWH 中有所增加。 HIV-1C Tat 取代 (C30S31) 不会干扰 CD14 ++ CD16 +单核细胞向 CNS 的迁移。 这是第一项评估 CSF 和 PB 中的单核细胞并根据 HIV 亚型比较它们的比例的研究。
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Cerebrospinal fluid CD14++CD16+ monocytes in HIV-1 subtype C compared with subtype B
CD14++CD16+ monocytes are susceptible to HIV-1 infection, and cross the blood–brain barrier. HIV-1 subtype C (HIV-1C) shows reduced Tat protein chemoattractant activity compared to HIV-1B, which might influence monocyte trafficking into the CNS. We hypothesized that the proportion of monocytes in CSF in HIV-1C is lower than HIV-1B group. We sought to assess differences in monocyte proportions in cerebrospinal fluid (CSF) and peripheral blood (PB) between people with HIV (PWH) and without HIV (PWoH), and by HIV-1B and -C subtypes. Immunophenotyping was performed by flow cytometry, monocytes were analyzed within CD45 + and CD64 + gated regions and classified in classical (CD14++CD16−), intermediate (CD14++CD16+), and non-classical (CD14lowCD16+). Among PWH, the median [IQR] CD4 nadir was 219 [32–531] cell/mm3; plasma HIV RNA (log10) was 1.60 [1.60–3.21], and 68% were on antiretroviral therapy (ART). Participants with HIV-1C and -B were comparable in terms of age, duration of infection, CD4 nadir, plasma HIV RNA, and ART. The proportion of CSF CD14++CD16+ monocytes was higher in participants with HIV-1C than those with HIV-1B [2.00(0.00–2.80) vs. 0.00(0.00–0.60) respectively, p = 0.03 after BH correction p = 0.10]. Despite viral suppression, the proportion of total monocytes in PB increased in PWH, due to the increase in CD14++CD16+ and CD14lowCD16+ monocytes. The HIV-1C Tat substitution (C30S31) did not interfere with the migration of CD14++CD16+ monocytes to the CNS. This is the first study to evaluate these monocytes in the CSF and PB and compare their proportions according to HIV subtype.