期刊
FRONTIERS IN IMMUNOLOGY
卷 11, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2020.01474
关键词
rheumatoid arthritis; microRNA; FOXO signaling pathway; programmed cell death 1 (PD-1); memory T cell; CD8(+)T cell
类别
资金
- Swedish Research Council [521-2011-2414, 521-2014-2637]
- Medical Society of Gothenburg
- Swedish Rheumatology Association [R-566961, R-477321]
- King Gustaf V's 80-Year Foundation [FAI-2014-0016]
- Torsten Soderberg's Foundation
- Rune and Ulla Amlov's Trust [2018-167]
- Lundberg's Foundation
- Tore Nilsson's Foundation [2019-00742]
- [ALFGBG-671631]
Objective:Smoking suppresses PD-1 expression in patients with rheumatoid arthritis (RA). In this study, we assess if smoking changed the epigenetic control over CD8(+)T cell memory formation through a microRNA (miR) dependent mechanism. Methods:Phenotypes of CD8(+)T cells from smokers and non-smokers, RA and healthy, were analyzed by flow cytometry. A microarray analysis was used to screen for differences in miR expression. Sorted CD8(+)cells werein vitrostimulated with nicotine and analyzed for transcription of miRs and genes related to memory programming by qPCR. Results:CD27(+)CD107a(-)CD8(+)T cells, defining a naive-memory population, had low expression of PD-1. Additionally, the CD27(+)population was more frequent in smokers (p= 0.0089). Smokers were recognized by differential expression of eight miRs. Let-7c-5p, let-7d-5p and let-7e-5p, miR-92a-3p, miR-150-5p, and miR-181-5p were up regulated, while miR-3196 and miR-4723-5p were down regulated. These miRs were predicted to target proteins within the FOXO-signaling pathway involved in CD8(+)memory programming. Furthermore, miR-92a-3p was differentially expressed in CD8(+)cells with naive-memory predominance. Nicotine exposure of CD8(+)cells induced the expression of miR-150-5p and miR-181a-5p in the naive-memory cellsin vitro. Additionally, nicotine exposure inverted the ratio between mRNAs of proteins in the FOXO pathway and their targeting miRs. Conclusions:Smokers have a high prevalence of CD8(+)T cells with a naive-memory phenotype. These cells express a miR profile that interacts with the memory programming conducted through the FOXO pathway.
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