PMID- 28424684 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230201 IS - 1664-3224 (Print) IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 8 DP - 2017 TI - Modulation of Human Leukocyte Antigen-C by Human Cytomegalovirus Stimulates KIR2DS1 Recognition by Natural Killer Cells. PG - 298 LID - 10.3389/fimmu.2017.00298 [doi] LID - 298 AB - The interaction of inhibitory killer cell Ig-like receptors (KIRs) with human leukocyte antigen (HLA) class I molecules has been characterized in detail. By contrast, activating members of the KIR family, although closely related to inhibitory KIRs, appear to interact weakly, if at all, with HLA class I. KIR2DS1 is the best studied activating KIR and it interacts with C2 group HLA-C (C2-HLA-C) in some assays, but not as strongly as KIR2DL1. We used a mouse 2B4 cell reporter system, which carries NFAT-green fluorescent protein with KIR2DS1 and a modified DAP12 adaptor protein. KIR2DS1 reporter cells were not activated upon coculture with 721.221 cells transfected with different HLA-C molecules, or with interferon-gamma stimulated primary dermal fibroblasts. However, KIR2DS1 reporter cells and KIR2DS1(+) primary natural killer (NK) cells were activated by C2-HLA-C homozygous human fetal foreskin fibroblasts (HFFFs) but only after infection with specific clones of a clinical strain of human cytomegalovirus (HCMV). Active viral gene expression was required for activation of both cell types. Primary NKG2A(-)KIR2DS1(+) NK cell subsets degranulated after coculture with HCMV-infected HFFFs. The W6/32 antibody to HLA class I blocked the KIR2DS1 reporter cell interaction with its ligand on HCMV-infected HFFFs but did not block interaction with KIR2DL1. This implies a differential recognition of HLA-C by KIR2DL1 and KIR2DS1. The data suggest that modulation of HLA-C by HCMV is required for a potent KIR2DS1-mediated NK cell activation. FAU - van der Ploeg, Kattria AU - van der Ploeg K AD - Department of Pathology, University of Cambridge, Cambridge, UK. FAU - Chang, Chiwen AU - Chang C AD - Department of Pathology, University of Cambridge, Cambridge, UK. FAU - Ivarsson, Martin A AU - Ivarsson MA AD - Department of Pathology, University of Cambridge, Cambridge, UK. FAU - Moffett, Ashley AU - Moffett A AD - Department of Pathology, University of Cambridge, Cambridge, UK. FAU - Wills, Mark R AU - Wills MR AD - Department of Medicine, University of Cambridge, Cambridge, UK. FAU - Trowsdale, John AU - Trowsdale J AD - Department of Pathology, University of Cambridge, Cambridge, UK. LA - eng GR - G0701279/MRC_/Medical Research Council/United Kingdom GR - MR/K021087/1/MRC_/Medical Research Council/United Kingdom PT - Journal Article DEP - 20170329 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 PMC - PMC5372792 OTO - NOTNLM OT - HLA-C OT - KIR2DS1 OT - human cytomegalovirus OT - killer Ig-like receptor OT - natural killer cells EDAT- 2017/04/21 06:00 MHDA- 2017/04/21 06:01 PMCR- 2017/01/01 CRDT- 2017/04/21 06:00 PHST- 2017/01/20 00:00 [received] PHST- 2017/03/03 00:00 [accepted] PHST- 2017/04/21 06:00 [entrez] PHST- 2017/04/21 06:00 [pubmed] PHST- 2017/04/21 06:01 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2017.00298 [doi] PST - epublish SO - Front Immunol. 2017 Mar 29;8:298. doi: 10.3389/fimmu.2017.00298. eCollection 2017.