PMID- 32372213 OWN - NLM STAT- MEDLINE DCOM- 20210712 LR - 20210712 IS - 1432-0738 (Electronic) IS - 0340-5761 (Print) IS - 0340-5761 (Linking) VI - 94 IP - 6 DP - 2020 Jun TI - Electronic cigarette vapour moderately stimulates pro-inflammatory signalling pathways and interleukin-6 production by human monocyte-derived dendritic cells. PG - 2097-2112 LID - 10.1007/s00204-020-02757-8 [doi] AB - Dendritic cells (DCs) are professional antigen presenting cells that play a critical role in bridging innate and adaptive immunity. Numerous studies have shown that tobacco constituents present in conventional cigarettes affect the phenotype and function of DCs; however, no studies have examined the effects of vapour from E-cigarettes on human DCs. Here, the effects of E-cigarette vapour extract (ECVE) on the phenotype and function of DCs were investigated by creating an in vitro cell culture model using human monocyte-derived DCs (MoDCs). Immature DCs were generated from peripheral blood monocytes and mature DCs were then produced by treatment with LPS or Poly I:C for 24 h. For LPS-matured DCs, 3% ECVE treatment slightly suppressed HLA-DR and CD86 expression, whereas 1% ECVE treatment enhanced IL-6 production. The overall expression of 29 signalling molecules and other cytoplasmic proteins (mainly associated with DC activation) was significantly upregulated in immature DCs by 1% ECVE, and in LPS-treated DCs by 3% ECVE. In particular, the condition that induced IL-6 production also upregulated MAPK pathway activation. These findings indicate that E-cigarette vapour moderately affects human DCs, but the effects are less pronounced than those reported for tobacco smoke. FAU - Chen, I-Ling AU - Chen IL AD - School of Life Sciences, University of Nottingham, Life Sciences Building, University Park, Nottingham, NG7 2RD, UK. FAU - Todd, Ian AU - Todd I AD - School of Life Sciences, University of Nottingham, Life Sciences Building, University Park, Nottingham, NG7 2RD, UK. FAU - Tighe, Patrick J AU - Tighe PJ AD - School of Life Sciences, University of Nottingham, Life Sciences Building, University Park, Nottingham, NG7 2RD, UK. FAU - Fairclough, Lucy C AU - Fairclough LC AUID- ORCID: 0000-0003-4581-9741 AD - School of Life Sciences, University of Nottingham, Life Sciences Building, University Park, Nottingham, NG7 2RD, UK. lucy.fairclough@nottingham.ac.uk. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20200505 PL - Germany TA - Arch Toxicol JT - Archives of toxicology JID - 0417615 RN - 0 (E-Cigarette Vapor) RN - 0 (IL6 protein, human) RN - 0 (Inflammation Mediators) RN - 0 (Interleukin-6) SB - IM MH - Cells, Cultured MH - Dendritic Cells/*drug effects/immunology/metabolism MH - E-Cigarette Vapor/*toxicity MH - *Electronic Nicotine Delivery Systems MH - Humans MH - Inflammation Mediators/*metabolism MH - Interleukin-6/*metabolism MH - Phenotype MH - Signal Transduction MH - Up-Regulation MH - Vaping/*adverse effects PMC - PMC7303083 OTO - NOTNLM OT - Dendritic cell OT - Electronic cigarette OT - Interleukin-6 OT - Protein array OT - Signalling molecule COIS- The authors state that they have no conflicts of interest to declare. EDAT- 2020/05/07 06:00 MHDA- 2021/07/13 06:00 PMCR- 2020/05/05 CRDT- 2020/05/07 06:00 PHST- 2020/04/09 00:00 [received] PHST- 2020/04/21 00:00 [accepted] PHST- 2020/05/07 06:00 [pubmed] PHST- 2021/07/13 06:00 [medline] PHST- 2020/05/07 06:00 [entrez] PHST- 2020/05/05 00:00 [pmc-release] AID - 10.1007/s00204-020-02757-8 [pii] AID - 2757 [pii] AID - 10.1007/s00204-020-02757-8 [doi] PST - ppublish SO - Arch Toxicol. 2020 Jun;94(6):2097-2112. doi: 10.1007/s00204-020-02757-8. Epub 2020 May 5.