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完整的艾滋病毒DNA在有或没有完全抑制病毒载量的儿童中衰变

Daniel B Reeves^1,2, Morgan Litchford³, Carolyn S Fish³

¹Vaccine and Infectious Diseases, Fred Hutchinson Cancer Center, Seattle, Washington, United States of America.

|April 4, 2025

概括

了解在接受抗逆转录病毒疗法 (ART) 的儿童中艾滋病毒的持续性,是找到治愈的关键. 这项研究表明,随着时间的推移,HIV DNA 衰变的速度会减慢,短暂的ART 中断可能不会显著地扩大儿童的病毒储存库.

科学领域:

病毒学病毒学
免疫学免疫学免疫学
儿童传染病儿童传染病

背景情况:

在抗逆转录病毒治疗 (ART) 期间,艾滋病毒的持续性是治愈儿童艾滋病毒的主要障碍.
了解儿童艾滋病毒储存库的动态对于开发有效的治疗策略至关重要.

研究的目的:

在ART期间阐明艾滋病毒持续性在艾滋病毒感染儿童 (CWH) 的动态和机制.
研究完整和缺陷的HIVDNA的衰变动力学及其与免疫反应的关系.

主要方法:

对120名肯尼亚CWH进行长度研究,在1-12个月之间启动ART.
测量血HIVRNA,CD4+T细胞计数和完整/缺陷的HIVDNA,使用交叉亚型完整前病毒性DNA测定 (CS-IPDA).
数学建模分析HIVRNA和DNA以及T细胞受体 (TCR) β克隆的衰变动力学.

主要成果:

早期ART (0-1年) 显示了血RNA和HIVDNA的快速衰变,半衰期为3个月 (完整) 和9个月 (有缺陷).
经过病毒抑制 (1-8年),完整的HIVDNA衰变速度减慢 (22个月半衰期),而缺陷的DNA衰变则停止.
个别的CD4+TCRβ克隆有所不同,但平均动力学与缺陷的DNA和CD4数量保持一致,这表明选择性压力影响完整的DNA衰变.
短暂的ART中断与短暂的HIVDNA上升有关,但没有显著影响长期完整的水库.

结论:

在接受ART治疗的儿童中,HIV DNA 衰变动力学是双相的,在较长时间内,完整的前病毒的衰变速度较慢.
完整和缺陷的HIVDNA的不同衰变速率受到CD4+T细胞的选择性压力的影响.
短暂的ART中断可能不会显著增加儿童的HIV储量,为治疗策略和潜在的治愈干预提供了洞察力.

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