title: Regulation of the class II and class I MHC pathways in human THP-1 monocytic cells by interleukin-27.
abstract: Interleukin-27 (IL-27) is an IL-12-related cytokine that can promote both anti- and pro-inflammatory immune responses. In this study, we used the promonocytic cell line THP-1, an established model for monocytes to investigate if the immunoregulatory role of IL-27 is in part due to effects on major histocompatibility complex (MHC) Ag presentation. We find that IL-27 induces mRNA and surface expression of class II MHC in THP-1 cells. IL-27 also increases class I MHC heavy chain, beta2m, and TAP-1 transcripts, leading to an increased surface expression of class I MHC. In addition, IL-27 enhances expression of costimulatory molecules CD80 and CD86 and adhesion molecule CD54. Expression of the class II transactivator (CIITA) isoforms III and IV, but not I, transcripts increases in response to IL-27. Our data suggest that the pro-inflammatory role of IL-27 is mediated in part through increased expression of key molecules involved in the class II and class I MHC pathways.
authors.affiliation: State Key Laboratory of Experimental Hematology, Institute of Hematology & Hospital of Blood Diseases, Chinese Academy of Medical Sciences & Peking Union Medical College, 288 Nanjing Road, Tianjin 300020, PR China.
authors.forename: Xiao Ming
authors.initials: XM
authors.lastname: Feng
authors.forename: Na
authors.initials: N
authors.lastname: Liu
authors.forename: Shao Guang
authors.initials: SG
authors.lastname: Yang
authors.forename: Li Yan
authors.initials: LY
authors.lastname: Hu
authors.forename: Xiao Li
authors.initials: XL
authors.lastname: Chen
authors.forename: Zhi Hong
authors.initials: ZH
authors.lastname: Fang
authors.forename: Qian
authors.initials: Q
authors.lastname: Ren
authors.forename: Shi Hong
authors.initials: SH
authors.lastname: Lu
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Zhong Chao
authors.initials: ZC
authors.lastname: Han
mesh_terms: D018122:B7-1 Antigen / Q000378:metabolism; D051940:B7-2 Antigen / Q000378:metabolism; D045744:Cell Line, Tumor; D005786:Gene Expression Regulation / Q000187:drug effects / Q000276:immunology*; D015395:Histocompatibility Antigens Class I / Q000235:genetics / Q000378:metabolism*; D000949:Histocompatibility Antigens Class II / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D018799:Intercellular Adhesion Molecule-1 / Q000378:metabolism; D050856:Interferon Regulatory Factor-1 / Q000096:biosynthesis / Q000235:genetics; D020381:Interleukin-17 / Q000494:pharmacology / Q000502:physiology*; D009000:Monocytes / Q000166:cytology / Q000187:drug effects / Q000276:immunology*; D009687:Nuclear Proteins / Q000235:genetics / Q000378:metabolism*; D020033:Protein Isoforms / Q000235:genetics / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D015534:Trans-Activators / Q000235:genetics / Q000378:metabolism*
chemical_list: D018122:B7-1 Antigen; D051940:B7-2 Antigen; D015395:Histocompatibility Antigens Class I; D000949:Histocompatibility Antigens Class II; D050856:Interferon Regulatory Factor-1; D020381:Interleukin-17; C083728:MHC class II transactivator protein; D009687:Nuclear Proteins; D020033:Protein Isoforms; D012333:RNA, Messenger; D015534:Trans-Activators; D018799:Intercellular Adhesion Molecule-1