Fig. 1

LILRA3 induction by TLRs. a Induction of LILRA3 and IL6 expression by a panel of TLR agonists. LILRA3 and IL6 expression was measured, using qPCR, as fold change to the unstimulated control from PBMCs stimulated for 24 h with Pam3CSK4 (P3C), heat killed Listeria monocytogenes (HKLM), polyinosinic-polycytidylic acid (Poly I:C) in high molecular weight (HMW) and low molecular weight (LMW) forms, lipopolysaccharide (LPS), flagellin, synthetic diacylated lipoprotein FSL-1, Imiquimod (R837), ssRNA40/LyoVec and CpG oligonucleotide ODN 2006. b Induction of LILRA3 by ssRNA40 on the transcriptional level. LILRA3 expression was measured as fold change to the unstimulated control from PBMCs stimulated for 24 h with uridine-rich HIV-derived ssRNA40, using ssRNA41 as control (n = 8). Wilcoxon matched-pairs signed rank test was used to compare the median between ssRNA41 and ssRNA40 stimulated LILRA3 expression. Scatter dot plot overlayed on bar graph displayed as median with interquartile range. c Induction of LILRA3 in PBMCS by ssRNA40 on the protein level. 30 × 10⁶/mL PBMCs from LILRA3 ^+/+ and LILRA3 ^−/− donors were stimulated with 5 μg/mL ssRNA40. 40 µL from each supernatant was loaded and Ponceau S staining was used as loading control. The membrane was blotted for LILRA3 and IL6, using recombinant LILRA3 as protein control. d Expression of ssRNA40-induced LILRA3 by monocytes. PBMCs stimulated overnight with ssRNA40 and LPS were purified for CD14⁺ monocytes using magnetic-activated cell sorting. The resulting CD14⁺ positive and depleted fractions were analysed via qPCR for LILRA3 expression, normalized to RPLP0 and relatively quantified to calibrator cDNA (*p < 0.05; **p < 0.01)