在真正的潜伏CD4+T细胞克隆中,HIV-1的转录是异质的
Cintia Bittar1, Ana Rafaela Teixeira1, Thiago Y Oliveira1,2
1Laboratory of Molecular Immunology, The Rockefeller University , New York, NY, USA.
The Journal of experimental medicine
|December 31, 2025
概括
了解CD4+T细胞中潜伏的HIV-1储存体是开发治疗方法的关键. 这项研究描述了潜伏的HIV-1前病毒,揭示了整合部位和低表达,对潜伏逆转剂的反应很温和.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 抗逆转录病毒疗法 (ART) 抑制HIV-1,但不能消除潜伏的病毒储备,主要是在CD4+T细胞中.
- 准确了解这种潜伏的储备对于开发治愈HIV-1的策略至关重要.
- 潜伏水库的异质性给有效根除带来了挑战.
研究的目的:
- 描述 CD4+ T 细胞克隆的特性,这些克隆体内含有完整的潜伏HIV-1 前病毒.
- 为了研究这些克隆体内的潜伏前病毒的集成部位和表达水平.
- 评估潜伏逆转剂 (LRAs) 对复活潜伏HIV-1的影响.
主要方法:
- 从接受ART的HIV-1感染者获得的单细胞中扩展CD4+T细胞克隆.
- 对宿主细胞基因组内的前病毒集成部位的分析.
- 在没有和存在LRA的情况下,量化HIV-1表达水平.
- 对宿主基因转录组变化的评估.
主要成果:
- 潜伏前病毒被发现集成到ZNF基因,非遗传卫星和中心区域中,通常与潜伏相关.
- 尽管来自克隆,但只有很小一部分 (0.4-14%) 的细胞表达了低水平的HIV-1,没有显著的宿主转录组变化.
- LRAs诱导HIV-1表达的变化和适度增加,这取决于特定的克隆和使用的LRA.
结论:
- 潜伏的HIV-1储库在前病毒集成和表达方面表现出显著的克隆内和克隆间多样性.
- 目前的LRAs具有适度和特定的效果,突出显示了对优化治疗策略的需求.
- 未来的药理学和免疫学方法必须考虑到这种多样性,以有效清除HIV-1储存库.
相关概念视频
Size and Structure of Viral Genomes
616
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
616
T Cell Activation and Clonal Selection
14.5K
T cells are integral to our adaptive immune system, recognizing and effectively responding to foreign antigens. T cell activation and clonal selection are pivotal in orchestrating this immune response. This article elucidates these mechanisms, detailing the roles of cluster of differentiation (CD) markers, major histocompatibility complex (MHC) molecules, costimulatory signals, and the process of clonal selection.
Naive T cells that have not yet encountered an antigen express two primary CD...
Naive T cells that have not yet encountered an antigen express two primary CD...
14.5K
Retrovirus Life Cycles
49.1K
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the...
49.1K
Viruses with RNA Genomes
714
RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
714


