PLX248956

GSE125044: Single cell analysis of diverse pathogen responses defines a molecular roadmap for generating antigen-specific immunity

• Organsim mouse
• Type RNASEQ
• Target gene
• Project ARCHS4

The immune system generates pathogen-tailored responses. The precise innate immune cell types and pathways that direct robust adaptive immune responses have not been fully characterized. By using fluorescent pathogens combined with massively parallel single cell RNA-seq, we comprehensively characterized the initial 48 hours of the innate immune response to diverse pathogens. We found that across all pathogens tested, most of the lymph node cell types and states showed little pathogen-specificity. In contrast, the rare antigen-positive cells displayed pathogen-specific transcriptional programs as early as 24 hours after immunization. In addition, mycobacteria activated a specific NK driven IFN response. Depletion of NK cells and IFN showed that IFN initiated a monocyte specific signaling cascade, leading to production of major chemokines and cytokines that promote Th1 development. Our systems immunology approach sheds light on early events in innate immune responses and may help further development of safe and efficient vaccines. SOURCE: Ido Amit (ido.amit@weizmann.ac.il) - Weizmann Institute of Science