Changes in antigen densities on leukocyte subsets correlate with progression of HIV disease.

Changes in antigen densities on leukocyte subsets correlate with progression of HIV disease.
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白细胞亚群抗原密度的变化与艾滋病毒疾病的进展相关。

DOI:
10.1093/intimm/8.1.1
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发表时间:
1996
影响因子:
4.4
通讯作者:
Herzenberg,LA
Herzenberg,LA
中科院分区:
医学3区
文献类型:
--
作者:
Roederer,M;Herzenberg,LA;Herzenberg,LA

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在154例HIV感染者和33例未感染的健康成人的横断面研究中,我们发现HIV感染者的白细胞表面抗原表达水平发生了特征性变化。这些变化,共同发生在几乎每一个白细胞亚群,是特定的:一个特定的抗原可能增加或减少的一个子集的PBMC,但保持不变的另一个。此外,在任何特定亚组内,一种或多种抗原的水平可以改变,而相同细胞上的其他表面抗原的水平保持恒定。以前已经注意到这些抗原密度变化中的一些,例如B细胞上的CD 20增加,以及CD 8 T细胞上的CD 38和HLA-DR增加。然而,这里使用的多参数流式细胞术方法揭示了大量表面标志物的变化,其中一些仅限于PBMC的精细亚群,如幼稚或记忆T细胞亚群。对于这些抗原中的许多抗原,表达的变化与绝对CD 4计数相关;然而,一些抗原在CD 4计数>500/μl的个体中差异最大;其他抗原仅在计数<100/μl的个体中差异最大。我们在B和T细胞上观察到的抗原密度的变化与HIV感染个体中这些细胞的持续准活化状态的观察结果一致。类似地,我们为NK细胞证明的信号转导分子CD 7和CD 16的表达改变可能与先前在NK细胞中证明的功能缺陷相关。因此,抗原密度的测量,如这里所展示的那些,可以提供HIV感染个体中PBMC亚群功能能力改变的替代标志物,从而可以提供比体外功能测定简单得多的免疫活性测定。
In a cross-sectional study of 154 HIV-infected and 33 uninfected healthy adults, we show that characteristic changes in the levels of expression of leukocyte surface antigens occur in the HIV-infected individuals. These changes, which collectively occur on virtually every leukocyte subset, are specific: a particular antigen may increase or decrease on one subset of PBMC but remain constant on another. Furthermore, within any particular subset, the levels of one or more antigens may change, while the levels of other surface antigens on the same cells remain constant. Some of these antigen density changes have been noted before, e.g. increased CD20 on B cells, and increased CD38 and HLA-DR on CD8 T cells. However, the multiparameter flow cytometry methodology used here reveals changes in a substantially larger number of surface markers, some of which are restricted to fine subsets of PBMC, such as naive or memory T cell subsets. For many of these antigens, the change in expression correlates with absolute CD4 counts; however, some antigens tend to differ most in individuals with CD4 counts >500/μl; others differ only in those with counts <100/μl. The changes in antigen densities we observe on B and T cells are consistent with the observation of a persistent quasi-activated state of these cells in HIV-infected individuals. Similarly, the altered expression of the signal-transducing molecules CD7 and CD16 that we demonstrate for NK cells may correlate with the functional defects previously demonstrated in NK cells. Thus, measurements of antigen densities such as those demonstrated here may provide surrogate markers for the altered functional capacities of PBMC subsets in HIV-infected individuals, and may thereby provide a much simpler assay for immunocompetence than in vitro functional assays.
DOI: --
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