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Learn MoreWe employed the single-cell RNA sequencing (scRNA-seq) technology to study HIV-induced transcriptomic change in innate immune cells in lymphoid organs. We performed scRNA-seq on hCD45+hCD3-hCD19- human leukocytes isolated from spleens of humanized NOD/Rag2-/- /c-/- (NRG) mice transplanted with human CD34+ hematopoietic stem-progenitor cells (NRG-hu HSC mice). We identified major populations of innate immune cells including plasmacytoid dendritic cells (pDC), myeloid dendritic cells (mDC), macrophage, nature killer (NK) cells and innate lymphoid cells (ILC). HIV-1 infection significantly upregulated genes involved in type-I interferon inflammatory pathways in each of the innate immune subsets. Interestingly, we found that the TNF-related apoptosis-inducing ligand (TRAIL) was upregulated in the innate immune populations including pDC, mDC, macrophage, NK and ILC. In summary, we characterized HIV-induced transcriptomic changes of innate immune cells in the spleen at single-cell levels, identified the TRAIL+ innate immune cells and defined an important role of TRAIL signaling pathway in HIV-1 induced CD4+ T cell depletion in vivo. SOURCE: Lishan Su (lishan_su@med.unc.edu) - University of North Carolina
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