Single-cell RNA-seq analysis reveals dual sensing of HIV-1 in blood Axl+ dendritic cells

Biological sciences; Clinical microbiology; Microbiology; Molecular biology; Transcriptomics.
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Flavien Brouiller, Francesca Nadalin, Pierre-Emmanuel Bonté, Ouardia Ait-Mohamed, Constance Delaugerre, Jean-Daniel Lelièvre, Florent Ginhoux, Nicolas Ruffin, Philippe Benaroch

  • iScience
  • 6.107
  • 2023 Jan 20;26(2):106019.
  • Human
  • 流式
  • 病毒/微生物
  • 树突状细胞
  • HIV
  • CD14,CD141,CD3,CD33,CD34,Clec9A (CD370)

Abstract

Sensing of incoming viruses is a pivotal task of dendritic cells (DCs). Human primary blood DCs encompass various subsets that are diverse in their susceptibility and response to HIV-1. The recent identification of the blood Axl+DC subset, endowed with unique capacities to bind, replicate, and transmit HIV-1 prompted us to evaluate its anti-viral response. We demonstrate that HIV-1 induced two main broad and intense transcriptional programs in different Axl+DCs potentially induced by different sensors; an NF-κB-mediated program that led to DC maturation and efficient CD4+ T cell activation, and a program mediated by STAT1/2 that activated type I IFN and ISG responses. These responses were absent from cDC2 exposed to HIV-1 except when viral replication was allowed. Finally, Axl+DCs actively replicating HIV-1 identified by quantification of viral transcripts exhibited a mixed NF-κB/ISG innate response. Our results suggest that the route of HIV-1 entry may dictate different innate sensing pathways by DCs.Keywords: Biological sciences; Clinical microbiology; Microbiology; Molecular biology; Transcriptomics.
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