PMID- 24789737 OWN - NLM STAT- MEDLINE DCOM- 20141209 LR - 20201226 IS - 1097-0215 (Electronic) IS - 0020-7136 (Linking) VI - 135 IP - 12 DP - 2014 Dec 15 TI - Lung tumours reprogram pulmonary dendritic cell immunogenicity at the microRNA level. PG - 2868-77 LID - 10.1002/ijc.28945 [doi] AB - Lung cancer arises in a context of tumour-induced immune suppression. Dendritic cells (DCs) are central players in the induction of anti-tumoural immunity, providing critical signals that drive the induction of cytotoxic T-cell responses. Meanwhile, microRNAs are associated with tumour development as well as immune regulation. We postulated that lung tumours escape immune control by reprogramming DC immunogenicity at the microRNA level. Using an orthotopic model of lung cancer, we first identified the DC population responsible for transport and cross-presentation of lung tumour-derived antigens to naive T cells in the draining mediastinal lymph nodes (LNs). Profiling the full microRNA repertoire of these DCs revealed a restricted set of microRNAs that was consistently dysregulated in the presence of lung tumours, with miR-301a as one of the top upregulated transcripts. Overexpression of miR-301a in DCs suppressed IL-12 secretion, decreased IFN-gamma release from antigen-specific cytotoxic T cells, and shifted antigen-specific T helper cytokine profile away from IFN-gamma towards IL-13 and IL-17A-secreting T cells. Strikingly, DC-selective Dicer1 gene deletion resulted in delayed lung tumour growth and a survival benefit. Taken together, our data reveal that lung tumours induce an immunosuppressive microRNA signature in pulmonary DCs. Interfering with the DC-intrinsic capacity to remodel microRNA repertoires affects lung tumour outcome. CI - (c) 2014 UICC. FAU - Pyfferoen, Lotte AU - Pyfferoen L AD - Department of Respiratory Medicine, Tumor Immunology Laboratory, Ghent University Hospital, Ghent, Belgium; VIB Inflammation Research Center, Ghent, Belgium; Department of Respiratory Medicine, Ghent University, Ghent, Belgium. FAU - Mestdagh, Pieter AU - Mestdagh P FAU - Vergote, Karl AU - Vergote K FAU - De Cabooter, Nancy AU - De Cabooter N FAU - Vandesompele, Jo AU - Vandesompele J FAU - Lambrecht, Bart N AU - Lambrecht BN FAU - Vermaelen, Karim Y AU - Vermaelen KY LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140514 PL - United States TA - Int J Cancer JT - International journal of cancer JID - 0042124 RN - 0 (Antigens, Neoplasm) RN - 0 (Cytokines) RN - 0 (Interleukin-13) RN - 0 (Interleukin-17) RN - 0 (MIRN301 microRNA, mouse) RN - 0 (MicroRNAs) RN - 187348-17-0 (Interleukin-12) RN - 82115-62-6 (Interferon-gamma) RN - EC 3.1.26.3 (DICER1 protein, human) RN - EC 3.1.26.3 (Ribonuclease III) RN - EC 3.6.4.13 (DEAD-box RNA Helicases) SB - IM MH - Animals MH - Antigens, Neoplasm/metabolism MH - Bone Marrow Cells/cytology MH - Cell Proliferation MH - Cytokines/metabolism MH - DEAD-box RNA Helicases/*metabolism MH - Dendritic Cells/*cytology MH - Gene Deletion MH - Humans MH - Interferon-gamma/metabolism MH - Interleukin-12/metabolism MH - Interleukin-13/metabolism MH - Interleukin-17/metabolism MH - Lung Neoplasms/*immunology/therapy MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - MicroRNAs/*metabolism MH - Neoplasm Transplantation MH - Ribonuclease III/*metabolism MH - T-Lymphocytes, Cytotoxic/cytology/*metabolism MH - T-Lymphocytes, Helper-Inducer/cytology OTO - NOTNLM OT - Dicer OT - dendritic cells OT - lung cancer OT - microRNAs EDAT- 2014/05/03 06:00 MHDA- 2014/12/15 06:00 CRDT- 2014/05/03 06:00 PHST- 2013/11/26 00:00 [received] PHST- 2014/04/15 00:00 [accepted] PHST- 2014/05/03 06:00 [entrez] PHST- 2014/05/03 06:00 [pubmed] PHST- 2014/12/15 06:00 [medline] AID - 10.1002/ijc.28945 [doi] PST - ppublish SO - Int J Cancer. 2014 Dec 15;135(12):2868-77. doi: 10.1002/ijc.28945. Epub 2014 May 14.