Single Cell RNA-Seq Characterization of an Adaptive Population of NK Cells after Primary CMV Infection in Rhesus Macaques
Blood(2021)
Abstract
By virtue of their direct cytotoxicity to transformed and virus infected cells, Natural Killer (NK) cells play crucial roles in immunity. NK cells modulate and coordinate innate and adaptive responses through the release of chemokines and cytokines. Although NK cells are endowed only with germ-line encoded receptors, evidence has been accumulating, that subsets of NK cells can bestow adoptively transferable, long-lasting and antigen-specific immune responses to certain haptens and viruses. Growing evidence suggests that adaptive immune responses lie on a spectrum. Rechallenge of cells, canonically belonging to the innate immune system, can result in enhanced responsiveness - a process termed ‘trained immunity’ and thought to be maintained by epigenetic and metabolic reprogramming. In previous work, our lab studied the role of NK cell responses to rhesus cytomegalovirus (rhCMV) in a genetic barcoding model. We found that new clones arose in the CD16 + NK compartment after primary rhCMV infection. There was rapid clearance without the emergence of new clones in subsequent rechallenge with rhCMV.
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Key words
primary cmv infection,nk cells,rna-seq
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