Elizabeth C Rosser1, Hannah Lom1, David Bending2, Chantal L Duurland3, Mona Bajaj-Elliott3, Lucy R Wedderburn4. 1. University College London Great Ormond Street Institute of Child Health and Arthritis Research UK Centre for Adolescent Rheumatology at University College London, University College London Hospitals, and Great Ormond Street Hospital, London, UK. 2. Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK. 3. University College London Great Ormond Street Institute of Child Health, London, UK. 4. University College London Great Ormond Street Institute of Child Health, Arthritis Research UK Centre for Adolescent Rheumatology at University College London, University College London Hospitals, and Great Ormond Street Hospital, and NIHR Biomedical Research Centre at Great Ormond Street Hospital, London, UK.
Abstract
OBJECTIVE: Evidence suggests that aberrant function of innate lymphoid cells (ILCs), whose functional and transcriptional profiles overlap with those of Th cell subsets, contributes to immune-mediated pathologies. To date, analysis of juvenile idiopathic arthritis (JIA) immune pathology has concentrated on the contribution of CD4+ T cells; we have previously identified an expansion of Th17 cells within the synovial fluid (SF) of JIA patients. We undertook this study to extend this analysis to further investigate the role of ILCs and other interleukin-17 (IL-17)-producing T cell subsets in JIA. METHODS: ILCs and CD3+ T cell subsets were defined in peripheral blood mononuclear cells (PBMCs) from healthy adults, healthy children, and JIA patients and in SF mononuclear cells (SFMCs) from JIA patients using flow cytometry. Defined subsets in SFMCs were correlated with clinical measures including physician's global assessment of disease activity on a visual analog scale, number of joints with active disease, and erythrocyte sedimentation rate. Transcription factor and cytokine profiles of sorted ILCs were assessed by quantitative reverse transcriptase-polymerase chain reaction. RESULTS: Group 1 ILCs (ILC1s), NKp44- group 3 ILCs (natural cytotoxicity receptor-negative [NCR-] ILC3s), and NKp44+ ILC3s (NCR+ ILC3s) were enriched in JIA SFMCs compared to PBMCs, which corresponded to an increase in transcripts for TBX21, IFNG, and IL17A. Of the ILC subsets, the frequency of NCR- ILC3s in JIA SFMCs displayed the strongest positive association with clinical measures, which was mirrored by an expansion in IL-17A+CD4+, IL-17A+CD8+, and IL-17A+ γδ T cells. CONCLUSION: We demonstrate that the strength of the IL-17A signature in JIA SFMCs is determined by multiple lymphoid cell types, including NCR- ILC3s and IL-17A+CD4+, IL-17A+CD8+, and IL-17A+ γδ T cells. These observations may have important implications for the development of stratified therapeutics.
OBJECTIVE: Evidence suggests that aberrant function of innate lymphoid cells (ILCs), whose functional and transcriptional profiles overlap with those of Th cell subsets, contributes to immune-mediated pathologies. To date, analysis of juvenile idiopathic arthritis (JIA) immune pathology has concentrated on the contribution of CD4+ T cells; we have previously identified an expansion of Th17 cells within the synovial fluid (SF) of JIA patients. We undertook this study to extend this analysis to further investigate the role of ILCs and other interleukin-17 (IL-17)-producing T cell subsets in JIA. METHODS: ILCs and CD3+ T cell subsets were defined in peripheral blood mononuclear cells (PBMCs) from healthy adults, healthy children, and JIA patients and in SF mononuclear cells (SFMCs) from JIA patients using flow cytometry. Defined subsets in SFMCs were correlated with clinical measures including physician's global assessment of disease activity on a visual analog scale, number of joints with active disease, and erythrocyte sedimentation rate. Transcription factor and cytokine profiles of sorted ILCs were assessed by quantitative reverse transcriptase-polymerase chain reaction. RESULTS: Group 1 ILCs (ILC1s), NKp44- group 3 ILCs (natural cytotoxicity receptor-negative [NCR-] ILC3s), and NKp44+ ILC3s (NCR+ ILC3s) were enriched in JIA SFMCs compared to PBMCs, which corresponded to an increase in transcripts for TBX21, IFNG, and IL17A. Of the ILC subsets, the frequency of NCR- ILC3s in JIA SFMCs displayed the strongest positive association with clinical measures, which was mirrored by an expansion in IL-17A+CD4+, IL-17A+CD8+, and IL-17A+ γδ T cells. CONCLUSION: We demonstrate that the strength of the IL-17A signature in JIA SFMCs is determined by multiple lymphoid cell types, including NCR- ILC3s and IL-17A+CD4+, IL-17A+CD8+, and IL-17A+ γδ T cells. These observations may have important implications for the development of stratified therapeutics.
Authors: Laura Maggi; Alessio Mazzoni; Rolando Cimaz; Francesco Liotta; Francesco Annunziato; Lorenzo Cosmi Journal: Front Immunol Date: 2019-03-14 Impact factor: 7.561
Authors: Akul Singhania; Christine M Graham; Leona Gabryšová; Lúcia Moreira-Teixeira; Evangelos Stavropoulos; Jonathan M Pitt; Probir Chakravarty; Annika Warnatsch; William J Branchett; Laura Conejero; Jing-Wen Lin; Sophia Davidson; Mark S Wilson; Gregory Bancroft; Jean Langhorne; Eva Frickel; Abdul K Sesay; Simon L Priestnall; Eleanor Herbert; Marianna Ioannou; Qian Wang; Ian R Humphreys; Jonathan Dodd; Peter J M Openshaw; Katrin D Mayer-Barber; Dragana Jankovic; Alan Sher; Clare M Lloyd; Nicole Baldwin; Damien Chaussabel; Venizelos Papayannopoulos; Andreas Wack; Jacques F Banchereau; Virginia M Pascual; Anne O'Garra Journal: Nat Commun Date: 2019-06-28 Impact factor: 14.919