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Coenen I, de Jong E, Jones AC, Khoo SK, Foo S, Howland SW, Ginhoux F, Le Souëf PN, Holt PG, Strickland DH, Laing IA, Leffler J. Impaired interferon response in plasmacytoid dendritic cells from children with persistent wheeze. J Allergy Clin Immunol 2024; 153:1083-1094. [PMID: 38110059 DOI: 10.1016/j.jaci.2023.11.920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 10/31/2023] [Accepted: 11/24/2023] [Indexed: 12/20/2023]
Abstract
BACKGROUND Impaired interferon response and allergic sensitization may contribute to virus-induced wheeze and asthma development in young children. Plasmacytoid dendritic cells (pDCs) play a key role in antiviral immunity as critical producers of type I interferons. pDCs also express the high-affinity IgE receptor through which type I interferon production may be negatively regulated. Whether antiviral function of pDCs is associated with recurrent episodes of wheeze in young children is not well understood. OBJECTIVE We sought to evaluate the phenotype and function of circulating pDCs in children with a longitudinally defined wheezing phenotype. METHODS We performed multiparameter flow cytometry on PBMCs from 38 children presenting to the emergency department with an acute episode of respiratory wheeze and 19 controls. RNA sequencing on isolated pDCs from the same individuals was also performed. For each subject, their longitudinal exacerbation phenotype was determined using the Western Australia public hospital database. RESULTS We observed a significant depletion of circulating pDCs in young children with a persistent phenotype of wheeze. The same individuals also displayed upregulation of the FcεRI on their pDCs. Based on transcriptomic analysis, pDCs from these individuals did not mount a robust systemic antiviral response as observed in children who displayed a nonrecurrent wheezing phenotype. CONCLUSIONS Our data suggest that circulating pDC phenotype and function are altered in young children with a persistent longitudinal exacerbation phenotype. Expression of high-affinity IgE receptor is increased and their function as major interferon producers is impaired during acute exacerbations of wheeze.
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Affiliation(s)
- Isabelle Coenen
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Emma de Jong
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Anya C Jones
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia; School of Medicine, University of Western Australia, Perth, Australia
| | - Siew-Kim Khoo
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Shihui Foo
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), Singapore, Republic of Singapore
| | - Shanshan Wu Howland
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), Singapore, Republic of Singapore
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A∗STAR), Singapore, Republic of Singapore
| | - Peter N Le Souëf
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia; School of Medicine, University of Western Australia, Perth, Australia
| | - Patrick G Holt
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Deborah H Strickland
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia
| | - Ingrid A Laing
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia; School of Medicine, University of Western Australia, Perth, Australia
| | - Jonatan Leffler
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia.
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Lee WWL, Puan KJ, Lee B, Chua C, Koh SM, Yusof N, Tan KP, Luis BS, Ong J, Merid SK, Ang R, Chan XY, Hui LJ, Terenzani E, Lum J, Foo S, Zolezzi F, Yan ATS, Melen E, Yi SJ, Rotzschke O, Andiappan AK. Eosinophilic allergic rhinitis is strongly associated with the CD45RB lo subset of CD161 + Th2 cells that secretes IL-2, IL-3, IL-4, IL-5, IL-9, and IL-13. Allergy 2023; 78:2794-2798. [PMID: 37551093 DOI: 10.1111/all.15846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/26/2023] [Accepted: 07/30/2023] [Indexed: 08/09/2023]
Affiliation(s)
- Wendy W L Lee
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Kia Joo Puan
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Shanghai Junshi Biosciences Co Ltd, Shanghai, China
| | - Bernett Lee
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Centre for Biomedical Informatics, Nanyang Technological University, Singapore, Singapore
| | - Celine Chua
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Ser Mei Koh
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Nurhashikin Yusof
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Kim Peng Tan
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Boris San Luis
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
- Institute of Molecular and Cell Biology (IMCB) A*STAR, Proteos, Singapore, Singapore
| | - Jocelyn Ong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Simon Kebede Merid
- Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - Rachel Ang
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Xue Ying Chan
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Low Jing Hui
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Elisa Terenzani
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Josephine Lum
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Shihui Foo
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Francesca Zolezzi
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Annabelle Tay Sok Yan
- Department of Otolaryngology, National University Hospital, Singapore, Singapore
- Department of Otolaryngology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Erik Melen
- Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
- Department of Paediatrics, Sachs' Children's Hospital, Stockholm, Sweden
| | - Soh Jian Yi
- Department of Paediatrics, National University Hospital, Singapore, Singapore
| | - Olaf Rotzschke
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Anand Kumar Andiappan
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
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3
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Foo S, Canavan M, Marzaioli V, Veale D, Wade S, Macdermott E, Deely D, Foley C, Killeen O, Fearon U. POS0495 CYTOKINE SYNERGY ENHANCES SYNOVIAL FIBROBLAST ACTIVATION IN CHILDREN WITH DOWN’S SYNDROME-ASSOCIATED ARTHRITIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.1996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundWe have previously shown that children with Down’s syndrome-associated arthritis (DA) display a more aggressive form of inflammatory arthritis compared to that of Juvenile Idiopathic Arthritis (Shih et al., 2019). DA is associated with an increase in polyfunctional T-cells coexpressing TNF-α DA is associated with an increase in polyfunctional T-cells coexpressing TNF-fibroblasts (FLS) (Foley et al., 2019).ObjectivesIn this study we examine the effect of cytokine synergy on primary DA FLS function.MethodsPrimary DA FLS were cultured and stimulated with TNF-α (0.1 and 1ng/ml), IL-17A (20 and 50ng/ml), IFN-ɣ (10 and 50ng/ml) and GM-CSF (20 and 100ng/ml) or a combination of these cytokines and the following functional experiments performed. Chemokine and adhesion molecule cell surface expression were quantified by flow cytometry, in addition to quantification of leukocyte-DA-FLS adhesion assays. Gene and protein expression of proinflammatory and metabolic mediators were quantified by ELISA and RT-PCR. Furthermore, real-time metabolic activity in response to cytokine stimulation was assessed by measuring the two major energy pathways: glycolysis (ECAR) and oxidative phosphorylation (OCR), by the Seahorse XFe96 Analyser.ResultsWe examined the effects of T cell derived cytokines, TNF-α, IL-17A, IFN-γ and GM-CSF, alone and in combination on DA FLS function. TNF-α, IL-17A and IFN-γ induced IL-6, RANTES and MCP-1 production, with no effect observed for GM-CSF. Furthermore, TNF-α, IFN-ɣ and IL-17A increased leukocyte adhesion to DA FLS. TNF-α and IFN-ɣ induced cell surface expression of CXCR3, CXCR4, ICAM-1 and VCAM-1 on DA FLS. Next, we investigated the potential synergistic relationship that these cytokines could have on proinflammatory mediators. IL-17A and IFN-ɣ potentiated the effects TNF-α on IL-6 and MCP-1 secretion compared to stimulation alone. Furthermore, cytokine synergy significantly induced IL-6, IL-8, RANTES and LDHA mRNA expression compared to basal. IL-17A and IFN-αL-17A and IFN- eeased ts TNF-α on IL-6 and MCP-1 secretion compared to stimulation alone. Additionally, IFN the ECAR:OCR ratio demonstrating a shift in the metabolic profile of DA FLS to glycolysis. Overall DA FLS are transformed from a quiescent metabolic state to an energetic phenotype.ConclusionTNF-αNF-lusion:OCR ratio demonstrating a shift in the metabolhe aggressive phenotype of DA FLS through increased cytokine, adhesion molecule and chemokine expression, which is pathways for the treatment of DA.References[1]Foley, C. et al. (2019) ‘Increased T cell plasticity with dysregulation of T follicular helper, T peripheral helper and T regulatory cell responses in children with JIA and Down syndrome-associated arthritis’, Arthritis & Rheumatology, pp. 0–1. doi: 10.1002/art.41150.[2]Shih, Y. J. et al. (2019) ‘Enthesitis-related arthritis is the most common category of juvenile idiopathic arthritis in Taiwan and presents persistent active disease’, Pediatric Rheumatology. Pediatric Rheumatology. doi: 10.1186/s12969-019-0363-0.Disclosure of InterestsNone declared.
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Fong SW, Yeo NKW, Chan YH, Goh YS, Amrun SN, Ang N, Rajapakse MP, Lum J, Foo S, Lee CYP, Carissimo G, Chee RSL, Torres-Ruesta A, Tay MZ, Chang ZW, Poh CM, Young BE, Tambyah PA, Kalimuddin S, Leo YS, Lye DC, Lee B, Biswas S, Howland SW, Renia L, Ng LFP. Robust Virus-Specific Adaptive Immunity in COVID-19 Patients with SARS-CoV-2 Δ382 Variant Infection. J Clin Immunol 2021; 42:214-229. [PMID: 34716845 PMCID: PMC8556776 DOI: 10.1007/s10875-021-01142-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 09/17/2021] [Indexed: 01/08/2023]
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOCs) that have become dominant as the pandemic progresses bear the ORF8 mutation together with multiple spike mutations. A 382-nucleotide deletion (Δ382) in the ORF7b and ORF8 regions has been associated with milder disease phenotype and less systemic inflammation in COVID-19 patients. However, its impact on host immunity against SARS-CoV-2 remains undefined. Here, RNA-sequencing was performed to elucidate whole blood transcriptomic profiles and identify contrasting immune signatures between patients infected with either wildtype or Δ382 SARS-CoV-2 variant. Interestingly, the immune landscape of Δ382 SARS-CoV-2 infected patients featured an increased adaptive immune response, evidenced by enrichment of genes related to T cell functionality, a more robust SARS-CoV-2-specific T cell immunity, as well as a more rapid antibody response. At the molecular level, eukaryotic initiation factor 2 signaling was found to be upregulated in patients bearing Δ382, and its associated genes were correlated with systemic levels of T cell-associated and pro-inflammatory cytokines. This study provides more in-depth insight into the host–pathogen interactions of ORF8 with great promise as a therapeutic target to combat SARS-CoV-2 infection.
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Affiliation(s)
- Siew-Wai Fong
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Nicholas Kim-Wah Yeo
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Yi-Hao Chan
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Yun Shan Goh
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Siti Naqiah Amrun
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Nicholas Ang
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | | | - Josephine Lum
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Shihui Foo
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Cheryl Yi-Pin Lee
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Guillaume Carissimo
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Rhonda Sin-Ling Chee
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Anthony Torres-Ruesta
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
| | - Matthew Zirui Tay
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Zi Wei Chang
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Chek Meng Poh
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Barnaby Edward Young
- National Centre for Infectious Diseases, Singapore City, Singapore
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore City, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore City, Singapore
| | - Paul A Tambyah
- National Centre for Infectious Diseases, Singapore City, Singapore
- Department of Medicine, National University Hospital, Singapore City, Singapore
- Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore
| | - Shirin Kalimuddin
- Department of Infectious Diseases, Singapore General Hospital, Singapore City, Singapore
- Programme in Emerging Infectious Diseases, Duke-NUS Medical School, Singapore City, Singapore
| | - Yee-Sin Leo
- National Centre for Infectious Diseases, Singapore City, Singapore
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore City, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore City, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore City, Singapore
| | - David C Lye
- National Centre for Infectious Diseases, Singapore City, Singapore
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore City, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore City, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore and National University Health System, Singapore City, Singapore
| | - Bernett Lee
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Subhra Biswas
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Shanshan Wu Howland
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Laurent Renia
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
- Singapore Immunology Network, Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore
| | - Lisa F P Ng
- A*STAR Infectious Diseases Labs (A*STAR ID Labs), Agency for Science, Technology and Research (A*STAR), Singapore City, Singapore.
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore City, Singapore.
- NIHR Health Protection Research Unit in Emerging and Zoonotic Infections, University of Liverpool, Liverpool, UK.
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK.
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5
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Foo S, Floudas A, Wade S, O’ Brien A, Ansboro S, Mullan R, Veale D, MacDermott E, Deely D, Foley C, Killeen O, Fearon U. POS0069 INCREASED T CELL RESPONSES, METABOLIC ACTIVITY AND FIBROBLAST INVASIVE CAPACITY IN CHILDREN WITH DOWN’S SYNDROME-ASSOCIATED ARTHRITIS COMPARED TO JUVENILE IDIOPATHIC ARTHRITIS. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.2104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:Juvenile idiopathic arthritis (JIA) was thought to be the most common inflammatory arthritis in children (Shih et al., 2019). However an aggressive, erosive arthritis of little-known immunologic mechanism occurs 20 times more frequently in children with Down’s syndrome (Foley et al., 2019).Objectives:This study was undertaken to characterize immune cell responses and synovial fibroblast invasiveness in children with Down’s syndrome-associated arthritis (DA).Methods:Multiparametric flow cytometric analysis was used to examine peripheral blood T cell, B cell and monocyte populations. In addition, T cell cytokine responses and their metabolic profile in children with DA, JIA, Down’s Syndrome (trisomy 21 [T21]), and in healthy controls were assessed. The function of DA primary synovial fibroblasts (FLS) was assessed in response to stimulation with pro-inflammatory mediators alone and in combination (TNF-α, IL-17a, IFN-γ, GM-CSF). The two major energy pathways glycolysis (ECAR) and oxidative phosphorylation (OCR) were quantified by the Seahorse XFe96 Analyser. Migration, adhesion, invasion and cytokine/chemokine secretion were quantified by wound repair scratch assays, Transwell collagen invasion chambers, adhesion binding assays, and ELISAs.Results:T cell frequencies were higher in DA compared to JIA and T21 in contrast to B cell frequencies which were decreased. T cell responses in DA were characterized by increased frequencies of CD4+ and CD8+ TNF- α, IFN- γ and GM-CSF producing T cells. The frequency of T peripheral helper (Tph) cells were elevated in children with DA compared to all other groups. In parallel, an increase in their metabolic profile evident by higher phosphorylation of mTOR pathway components AKT, mTOR and S6. Comparison of DA and JIA FLS demonstrated that DA FLS display a more invasive/migratory capacity and are more metabolically active. Based on the increased cytokine responses in DA T cells, we next examined the effect T cell derived cytokines TNF-α, IL-17A, IFN-γ and GM-CSF alone and in combination on DA FLS function. TNF-α, IL-17a and IFN-γ induced IL-6, RANTES and MCP-1 secretion, with no effect observed for GM-CSF. Furthermore, TNF-α and IL-17A induced DA FLS migration and PBMC adhesion to DA FLS. Finally IL17A and IFN-γ potentiated the effect of TNF-α on IL-6 and MCP-1 secretion compared to stimulations alone.Conclusion:DA is a more common and aggressive form of arthritis compared to JIA. It is characterized by increased T cell responses and a more invasive FLS phenotype compared to that of JIA, with T cell derived cytokine alone and in combination further inducing DA FLS pathogenic mechanisms. These effects mirror the increased erosive disease observed clinically.References:[1]Foley, C. et al. (2019) ‘Increased T cell plasticity with dysregulation of T follicular helper, T peripheral helper and T regulatory cell responses in children with JIA and Down syndrome-associated arthritis’, Arthritis & Rheumatology, pp. 0–1. doi: 10.1002/art.41150.[2]Shih, Y. J. et al. (2019) ‘Enthesitis-related arthritis is the most common category of juvenile idiopathic arthritis in Taiwan and presents persistent active disease’, Pediatric Rheumatology. Pediatric Rheumatology. doi: 10.1186/s12969-019-0363-0.Disclosure of Interests:None declared.
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Andiappan AK, Puan KJ, Lee B, Yeow PT, Yusof N, Merid SK, Kumar D, Lum J, Foo S, Koh G, Poidinger M, Zolezzi F, Wang DY, Melén E, Rotzschke O. Inverse association of FCER1A allergy variant in monocytes and plasmacytoid dendritic cells. J Allergy Clin Immunol 2020; 147:1510-1513.e8. [PMID: 33160967 DOI: 10.1016/j.jaci.2020.10.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 10/22/2020] [Accepted: 10/29/2020] [Indexed: 10/23/2022]
Affiliation(s)
- Anand Kumar Andiappan
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Kia Joo Puan
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Bernett Lee
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Poh Tuang Yeow
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Nurhashikin Yusof
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Simon Kebede Merid
- Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - Dilip Kumar
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Josephine Lum
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Shihui Foo
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Geraldine Koh
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Michael Poidinger
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore; Murdoch Children's Research Institute, Victoria, Australia
| | - Francesca Zolezzi
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | | | | | - De Yun Wang
- Department of Otalaryngology, National University of Singapore, Singapore
| | - Erik Melén
- Department of Clinical Science and Education Södersjukhuset, Karolinska Institutet, Stockholm, Sweden; Department of Paediatrics, Sachs' Children's Hospital, Stockholm, Sweden; Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Olaf Rotzschke
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore.
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7
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Foo S, Lewis F, Velangi S, Walsh S, Calonje JE. Vulval acne: a case series describing clinical features and management. Clin Exp Dermatol 2020; 46:319-323. [PMID: 32803767 DOI: 10.1111/ced.14424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/13/2020] [Indexed: 12/17/2022]
Abstract
Intermittent inflammation of the vulval pilosebaceous units is common and usually self-limiting, but some patients experience recurrent and more troublesome symptoms. There is a scarcity of information on this problem. We describe the clinical and histological features in these patients and the response to treatment. A retrospective, observational study of 16 patients with this phenomenon of recurrent, protracted folliculocentric inflammation of the vulval pilosebaceous unit was performed. Details on the clinical features, histology and response to treatment were collected. Mean age at presentation was 32 years (range 21-45). All patients reported recurrent painful papules and pustules on the labia majora and labia minora. Nine patients reported a cyclical pattern to the development of lesions, with premenstrual exacerbation being most common. Histological examination of these lesions showed a folliculocentric microabscess formation surrounded by an acute and chronic inflammatory cell infiltrate, with a focal foreign-body granulomatous reaction. All our patients responded well to tetracycline, antiandrogenic or retinoid therapy. We propose the term 'vulval acne' for this condition and propose a stepwise approach to its management. We hope to highlight this as a common but underreported entity.
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Affiliation(s)
- S Foo
- Department of Dermatology, Walsall Healthcare NHS Trust, Manor Hospital, Walsall, West Midlands, UK
| | - F Lewis
- St John's Institute of Dermatology, Guy's & St Thomas' NHS Foundation Trust, London, UK
| | - S Velangi
- University Hospital, Birmingham, West Midlands, UK
| | - S Walsh
- King's College Hospital, London, UK
| | - J E Calonje
- St John's Institute of Dermatology, Guy's & St Thomas' NHS Foundation Trust, London, UK
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8
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Chakarov S, Lim HY, Tan L, Lim SY, See P, Lum J, Zhang XM, Foo S, Nakamizo S, Duan K, Kong WT, Gentek R, Balachander A, Carbajo D, Bleriot C, Malleret B, Tam JKC, Baig S, Shabeer M, Toh SAES, Schlitzer A, Larbi A, Marichal T, Malissen B, Chen J, Poidinger M, Kabashima K, Bajenoff M, Ng LG, Angeli V, Ginhoux F. Two distinct interstitial macrophage populations coexist across tissues in specific subtissular niches. Science 2019; 363:363/6432/eaau0964. [PMID: 30872492 DOI: 10.1126/science.aau0964] [Citation(s) in RCA: 524] [Impact Index Per Article: 104.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Accepted: 02/08/2019] [Indexed: 12/12/2022]
Abstract
Macrophages are a heterogeneous cell population involved in tissue homeostasis, inflammation, and various pathologies. Although the major tissue-resident macrophage populations have been extensively studied, interstitial macrophages (IMs) residing within the tissue parenchyma remain poorly defined. Here we studied IMs from murine lung, fat, heart, and dermis. We identified two independent IM subpopulations that are conserved across tissues: Lyve1loMHCIIhiCX3CR1hi (Lyve1loMHCIIhi) and Lyve1hiMHCIIloCX3CR1lo (Lyve1hiMHCIIlo) monocyte-derived IMs, with distinct gene expression profiles, phenotypes, functions, and localizations. Using a new mouse model of inducible macrophage depletion (Slco2b1 flox/DTR), we found that the absence of Lyve1hiMHCIIlo IMs exacerbated experimental lung fibrosis. Thus, we demonstrate that two independent populations of IMs coexist across tissues and exhibit conserved niche-dependent functional programming.
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Affiliation(s)
- Svetoslav Chakarov
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Hwee Ying Lim
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
| | - Leonard Tan
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Sheau Yng Lim
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
| | - Peter See
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Josephine Lum
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Xiao-Meng Zhang
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Shihui Foo
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Satoshi Nakamizo
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Kaibo Duan
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Wan Ting Kong
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Rebecca Gentek
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, 13288 Marseille, France
| | - Akhila Balachander
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Daniel Carbajo
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Camille Bleriot
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Benoit Malleret
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore.,Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
| | - John Kit Chung Tam
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, Singapore 119228, Singapore
| | - Sonia Baig
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, 119228 Singapore, Singapore
| | - Muhammad Shabeer
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, 119228 Singapore, Singapore
| | - Sue-Anne Ee Shiow Toh
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, 119228 Singapore, Singapore
| | - Andreas Schlitzer
- Myeloid Cell Biology, Life & Medical Sciences Institute, University of Bonn, 53115 Bonn, Germany
| | - Anis Larbi
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Thomas Marichal
- Laboratory of Cellular and Molecular Immunology, GIGA Research, University of Liège, 4000 Liège, Belgium.,Faculty of Veterinary Medicine, Liège University, 4000 Liège, Belgium.,WELBIO, Walloon Excellence in Life Sciences and Biotechnology, 1300 Wallonia, Belgium
| | - Bernard Malissen
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, 13288 Marseille, France.,Centre d'Immunophénomique, Aix Marseille Université, INSERM, CNRS UMR, 13288 Marseille, France
| | - Jinmiao Chen
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Michael Poidinger
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Kenji Kabashima
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore.,Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
| | - Marc Bajenoff
- Centre d'Immunologie de Marseille-Luminy, Aix Marseille Université, INSERM, CNRS, 13288 Marseille, France
| | - Lai Guan Ng
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore
| | - Veronique Angeli
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Singapore
| | - Florent Ginhoux
- Singapore Immunology Network (SIgN), A*STAR, 8A Biomedical Grove, Immunos Building, Level 3, Singapore 138648, Singapore.
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9
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Xu W, Monaco G, Wong EH, Tan WLW, Kared H, Simoni Y, Tan SW, How WZY, Tan CTY, Lee BTK, Carbajo D, K G S, Low ICH, Mok EWH, Foo S, Lum J, Tey HL, Tan WP, Poidinger M, Newell E, Ng TP, Foo R, Akbar AN, Fülöp T, Larbi A. Mapping of γ/δ T cells reveals Vδ2+ T cells resistance to senescence. EBioMedicine 2018; 39:44-58. [PMID: 30528453 PMCID: PMC6354624 DOI: 10.1016/j.ebiom.2018.11.053] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 11/20/2018] [Accepted: 11/27/2018] [Indexed: 12/13/2022] Open
Abstract
Background Immune adaptation with aging is a major of health outcomes. Studies in humans have mainly focus on αβ T cells while γδ T cells have been neglected despite their role in immunosurveillance. We investigated the impact of aging on γδ T cell subsets phenotypes, functions, senescence and their molecular response to stress. Methods Peripheral blood of young and old donors in Singapore have been used to assess the phenotype, functional capacity, proliferation capacity and gene expression of the various γδ T cell subsets. Peripheral blood mononuclear cells from apheresis cones and young donors have been used to characterize the telomere length, epigenetics profile and DNA damage response of the various γδ T cell subsets phenotype. Findings Our data shows that peripheral Vδ2+ phenotype, functional capacity (cytokines, cytotoxicity, proliferation) and gene expression profile are specific when compared against all other αβ and γδ T cells in aging. Hallmarks of senescence including telomere length, epigenetic profile and DNA damage response of Vδ2+ also differs against all other αβ and γδ T cells. Interpretation Our results highlight the differential impact of lifelong stress on γδ T cells subsets, and highlight possible mechanisms that enable Vδ2+ to be resistant to cellular aging. The new findings reinforce the concept that Vδ2+ have an “innate-like” behavior and are more resilient to the environment as compared to “adaptive-like” Vδ1+ T cells.
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Affiliation(s)
- Weili Xu
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore; School of Biological Sciences, Nanyang Technological University, Singapore, Singapore
| | - Gianni Monaco
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore; Department of Biomedicine, University Hospital Basel, Basel, Switzerland
| | - Eleanor Huijin Wong
- Genome Institute of Singapore (GIS), Agency for Science Technology and Research (A*STAR), Genome Building, Biopolis, Singapore, Singapore
| | - Wilson Lek Wen Tan
- Genome Institute of Singapore (GIS), Agency for Science Technology and Research (A*STAR), Genome Building, Biopolis, Singapore, Singapore
| | - Hassen Kared
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Yannick Simoni
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Shu Wen Tan
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore; Immunology Programme, Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, Life Sciences Institute, National University of Singapore, Singapore, Singapore
| | - Wilson Zhi Yong How
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Crystal Tze Ying Tan
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Bernett Teck Kwong Lee
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Daniel Carbajo
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Srinivasan K G
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Ivy Chay Huang Low
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Esther Wing Hei Mok
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Shihui Foo
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Josephine Lum
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | | | | | - Michael Poidinger
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Evan Newell
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore
| | - Tze Pin Ng
- Gerontology Research Programme, Department of Psychological Medicine, National University Health System, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Roger Foo
- Genome Institute of Singapore (GIS), Agency for Science Technology and Research (A*STAR), Genome Building, Biopolis, Singapore, Singapore
| | - Arne N Akbar
- Institute of Immunity and Transplantation, University College London, London, United Kingdom
| | - Tamas Fülöp
- Research Center on Aging, Graduate Program in Immunology, Faculty of Medicine and Health Sciences, University of Sherbrooke, Sherbrooke, Quebec, Canada
| | - Anis Larbi
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore; School of Biological Sciences, Nanyang Technological University, Singapore, Singapore; Department of Microbiology, National University of Singapore, Singapore, Singapore; Department of Biology, Faculty of Science, University Tunis El Manar, Tunis, Tunisia.
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10
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Dillon M, Bergerhoff K, Pedersen M, Whittock H, Patin E, Smith H, Paget J, Patel R, Bozhanova G, Foo S, Campbell J, Ragulan C, Fontana E, Wilkins A, Sadanandam A, Melcher A, McLaughlin M, Harrington K. ATR inhibition with radiation creates an inflammatory tumour microenvironment. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy303.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Zelante T, Wong AYW, Mencarelli A, Foo S, Zolezzi F, Lee B, Poidinger M, Ricciardi-Castagnoli P, Fric J. Impaired calcineurin signaling in myeloid cells results in downregulation of pentraxin-3 and increased susceptibility to aspergillosis. Mucosal Immunol 2017; 10:470-480. [PMID: 27301880 DOI: 10.1038/mi.2016.52] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Accepted: 05/08/2016] [Indexed: 02/04/2023]
Abstract
Treatment of post-transplant patients with immunosuppressive drugs targeting the calcineurin-nuclear factor of activated T cells (NFAT) pathway, including cyclosporine A or tacrolimus, is commonly associated with a higher incidence of opportunistic infections, such as Aspergillus fumigatus, which can lead to severe life-threatening conditions. A component of the A. fumigatus cell wall, β-glucan, is recognized by dendritic cells (DCs) via the Dectin-1 receptor, triggering downstream signaling that leads to calcineurin-NFAT binding, NFAT translocation, and transcription of NFAT-regulated genes. Here, we address the question of whether calcineurin signaling in CD11c-expressing cells, such as DCs, has a specific role in the innate control of A. fumigatus. Impairment of calcineurin in CD11c-expressing cells (CD11ccrecnb1loxP) significantly increased susceptibility to systemic A. fumigatus infection and to intranasal infection in irradiated mice undergoing bone marrow transplant. Global expression profiling of bone marrow-derived DCs identified calcineurin-regulated processes in the immune response to infection, including expression of pentraxin-3, an important antifungal defense protein. These results suggest that calcineurin inhibition directly impairs important immunoprotective functions of myeloid cells, as shown by the higher susceptibility of CD11ccrecnbloxP mice in models of systemic and invasive pulmonary aspergillosis, including after allogeneic bone marrow transplantation. These findings are relevant to the clinical management of transplant patients with severe Aspergillus infections.
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Affiliation(s)
- T Zelante
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore.,Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - A Y W Wong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore.,National University of Singapore Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
| | - A Mencarelli
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore.,Emerging Infectious Diseases Programme, Duke-NUS, Singapore
| | - S Foo
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore
| | - F Zolezzi
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore
| | - B Lee
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore
| | - M Poidinger
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore.,Department of Biological Sciences, National University of Singapore, Singapore
| | - P Ricciardi-Castagnoli
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore
| | - J Fric
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Biopolis, Singapore.,Center for Translational Medicine, International Clinical Research Center, St Anne's University Hospital Brno, Brno, Czech Republic
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12
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Kumar D, Puan KJ, Andiappan AK, Lee B, Westerlaken GHA, Haase D, Melchiotti R, Li Z, Yusof N, Lum J, Koh G, Foo S, Yeong J, Alves AC, Pekkanen J, Sun LD, Irwanto A, Fairfax BP, Naranbhai V, Common JEA, Tang M, Chuang CK, Jarvelin MR, Knight JC, Zhang X, Chew FT, Prabhakar S, Jianjun L, Wang DY, Zolezzi F, Poidinger M, Lane EB, Meyaard L, Rötzschke O. A functional SNP associated with atopic dermatitis controls cell type-specific methylation of the VSTM1 gene locus. Genome Med 2017; 9:18. [PMID: 28219444 PMCID: PMC5319034 DOI: 10.1186/s13073-017-0404-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 01/11/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Expression quantitative trait loci (eQTL) databases represent a valuable resource to link disease-associated SNPs to specific candidate genes whose gene expression is significantly modulated by the SNP under investigation. We previously identified signal inhibitory receptor on leukocytes-1 (SIRL-1) as a powerful regulator of human innate immune cell function. While it is constitutively high expressed on neutrophils, on monocytes the SIRL-1 surface expression varies strongly between individuals. The underlying mechanism of regulation, its genetic control as well as potential clinical implications had not been explored yet. METHODS Whole blood eQTL data of a Chinese cohort was used to identify SNPs regulating the expression of VSTM1, the gene encoding SIRL-1. The genotype effect was validated by flow cytometry (cell surface expression), correlated with electrophoretic mobility shift assay (EMSA), chromatin immunoprecipitation (ChIP) and bisulfite sequencing (C-methylation) and its functional impact studied the inhibition of reactive oxygen species (ROS). RESULTS We found a significant association of a single CpG-SNP, rs612529T/C, located in the promoter of VSTM1. Through flow cytometry analysis we confirmed that primarily in the monocytes the protein level of SIRL-1 is strongly associated with genotype of this SNP. In monocytes, the T allele of this SNP facilitates binding of the transcription factors YY1 and PU.1, of which the latter has been recently shown to act as docking site for modifiers of DNA methylation. In line with this notion rs612529T associates with a complete demethylation of the VSTM1 promoter correlating with the allele-specific upregulation of SIRL-1 expression. In monocytes, this upregulation strongly impacts the IgA-induced production of ROS by these cells. Through targeted association analysis we found a significant Meta P value of 1.14 × 10-6 for rs612529 for association to atopic dermatitis (AD). CONCLUSION Low expression of SIRL-1 on monocytes is associated with an increased risk for the manifestation of an inflammatory skin disease. It thus underlines the role of both the cell subset and this inhibitory immune receptor in maintaining immune homeostasis in the skin. Notably, the genetic regulation is achieved by a single CpG-SNP, which controls the overall methylation state of the promoter gene segment.
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Affiliation(s)
- Dilip Kumar
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Kia Joo Puan
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Anand Kumar Andiappan
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Bernett Lee
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Geertje H A Westerlaken
- Laboratory of Translational Immunology, Department of Immunology, University Medical Center Utrecht, P.O. box 85090, Utrecht, 3508 AB, The Netherlands
| | - Doreen Haase
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Rossella Melchiotti
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Zhuang Li
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Nurhashikin Yusof
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Josephine Lum
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Geraldine Koh
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Shihui Foo
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Joe Yeong
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore.,Department of Pathology, Singapore General Hospital, Singapore, Republic of Singapore
| | - Alexessander Couto Alves
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK
| | - Juha Pekkanen
- Department of Environmental Health, National Institute for Health and Welfare, Kuopio, Finland
| | - Liang Dan Sun
- Institute of Dermatology and Department of Dermatology at No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
| | - Astrid Irwanto
- Genome Institute of Singapore (GIS), Agency for Science, Technology and Research of Singapore (A*STAR), Singapore, Republic of Singapore
| | - Benjamin P Fairfax
- Wellcome Trust Centre for Human Genetics, Oxford, UK.,Department of Oncology, Cancer and Haematology Centre, Churchill Hospital, Oxford, UK
| | - Vivek Naranbhai
- Wellcome Trust Centre for Human Genetics, Oxford, UK.,Department of Oncology, Cancer and Haematology Centre, Churchill Hospital, Oxford, UK
| | - John E A Common
- Institute of Medical Biology (IMB), A*STAR (Agency for Science, Technology and Research), Singapore, Republic of Singapore
| | - Mark Tang
- National Skin Center, Singapore, Republic of Singapore
| | - Chin Keh Chuang
- Institute of Molecular & Cellular Biology (IMCB), Agency for Science, Technology and Research (A*STAR), Singapore, 138648, Republic of Singapore.,Department of Physiology, NUS Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore
| | - Marjo-Riitta Jarvelin
- Department of Epidemiology and Biostatistics, School of Public Health, Imperial College London, London, UK.,Center for Life Course Epidemiology, Faculty of Medicine, University of Oulu, P.O. Box 5000, 90014, Oulu, Finland.,Biocenter Oulu, University of Oulu, P.O. Box 5000, Aapistie 5A, 90014, Oulu, Finland.,Unit of Primary Care, Oulu University Hospital, Kajaanintie 50, 90029 OYS, P.O. Box 20, 90220, Oulu, Finland
| | | | - Xuejun Zhang
- Institute of Dermatology and Department of Dermatology at No.1 Hospital, Anhui Medical University, Hefei, Anhui, China
| | - Fook Tim Chew
- Department of Biological Sciences, National University of Singapore, Singapore, Republic of Singapore
| | - Shyam Prabhakar
- Genome Institute of Singapore (GIS), Agency for Science, Technology and Research of Singapore (A*STAR), Singapore, Republic of Singapore
| | - Liu Jianjun
- Genome Institute of Singapore (GIS), Agency for Science, Technology and Research of Singapore (A*STAR), Singapore, Republic of Singapore
| | - De Yun Wang
- Department of Otolaryngology, National University of Singapore, Singapore, Republic of Singapore.,Biological Sciences, National University of Singapore, Singapore, Republic of Singapore
| | - Francesca Zolezzi
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - Michael Poidinger
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore
| | - E Birgitte Lane
- Institute of Medical Biology (IMB), A*STAR (Agency for Science, Technology and Research), Singapore, Republic of Singapore
| | - Linde Meyaard
- Laboratory of Translational Immunology, Department of Immunology, University Medical Center Utrecht, P.O. box 85090, Utrecht, 3508 AB, The Netherlands.
| | - Olaf Rötzschke
- Singapore Immunology Network (SIgN), A*STAR (Agency for Science, Technology and Research), 8A Biomedical Grove #04-06, Singapore, 138648, Republic of Singapore.
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13
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Yap Y, Tseng LM, Blackwell K, Cameron D, Foo S, Sriuranpong V, Huang CS, Chao TY, Kim TY, Chen SC, Jung K, Lee K, Sohn JH, Kim J, Hou MF, Han Y, Souami F, Dhuria S, Miller M, Verma S. LBA1 First-line ribociclib + letrozole in postmenopausal Asian women with hormone receptor-positive (HR+), human epidermal growth factor receptor 2-negative (HER2–) advanced breast cancer (ABC): A subgroup analysis from MONALEESA-2. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw637.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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14
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Andiappan AK, Sio YY, Lee B, Suri BK, Matta SA, Lum J, Foo S, Koh G, Liu J, Zolezzi F, Poidinger M, Wang DY, Rotzschke O, Chew FT. Functional variants of 17q12-21 are associated with allergic asthma but not allergic rhinitis. J Allergy Clin Immunol 2015; 137:758-66.e3. [PMID: 26483175 DOI: 10.1016/j.jaci.2015.08.038] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 08/02/2015] [Accepted: 08/25/2015] [Indexed: 01/12/2023]
Abstract
BACKGROUND Allergic rhinitis (AR) and asthma are common allergic conditions with a shared genetic component to their cause. The 17q12-21 locus includes several genes that have been linked to asthma susceptibility, but the role of this locus in AR is unclear. Asthma and AR in adults of Chinese ethnicity in Singapore are predominately caused by sensitization against house dust mites with a nearly complete penetrance of the allergen, which presents a unique opportunity for accurately identifying genetic associations with allergic diseases. OBJECTIVE We sought to define the functional role of 17q12-21 in patients with AR and allergic asthma. METHODS We asked whether single nucleotide polymorphisms (SNPs) in the 17q12-21 locus were associated with AR or asthma in a cohort of 3460 ethnic Chinese subjects residing in Singapore (1435 in the discovery phase and 2025 in the validation phase). Full-blood mRNA gene expression data, plasma IgE levels, and immune cell frequencies in peripheral blood were tested against the tag SNP genotypes. Luciferase assays were used to measure the effect of putative promoter SNPs on expression of the asthma-associated orosomucoid-like 3 gene (ORMDL3). RESULTS Within 17q12-21, only the tag SNP rs8076131 was significantly associated with asthma (P = 8.53 × 10(-10); odds ratio, 0.6715), and AR status was independent of SNPs in this region. C-A alleles at rs8076131 resulted in significantly increased ORMDL3 expression in HEK293 cells in vitro relative to T-G alleles. Moreover, subjects with the risk genotype AA exhibited significantly higher total IgE levels and higher blood eosinophil counts than those with the lower-risk genotypes. CONCLUSION The 17q12-21 locus has a strong genetic association with allergic asthma but not with AR. The polymorphic effect of this locus is attributed to the linkage set tagged by rs8076131, which affects the expression of ORMDL3, protein phosphatase 1, regulatory inhibitor subunit 1B (PPP1R1B), zona pellucida binding protein 2 (ZPBP2), and gasdermin B (GSDMB) and is correlated with high IgE levels and eosinophil counts in subjects bearing the risk genotype.
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Affiliation(s)
- Anand Kumar Andiappan
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore; Department of Biological Sciences, National University of Singapore, Singapore
| | - Yang Yie Sio
- Department of Biological Sciences, National University of Singapore, Singapore
| | - Bernett Lee
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Bani Kaur Suri
- Department of Biological Sciences, National University of Singapore, Singapore
| | - Sri Anusha Matta
- Department of Biological Sciences, National University of Singapore, Singapore
| | - Josephine Lum
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Shihui Foo
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Geraldine Koh
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Jianjun Liu
- Genome Institute of Singapore (GIS), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Francesca Zolezzi
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore
| | - Michael Poidinger
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore
| | - De Yun Wang
- Department of Otolaryngology, National University of Singapore, National University Health System, Singapore.
| | - Olaf Rotzschke
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore.
| | - Fook Tim Chew
- Department of Biological Sciences, National University of Singapore, Singapore.
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15
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Andiappan AK, Melchiotti R, Poh TY, Nah M, Puan KJ, Vigano E, Haase D, Yusof N, San Luis B, Lum J, Kumar D, Foo S, Zhuang L, Vasudev A, Irwanto A, Lee B, Nardin A, Liu H, Zhang F, Connolly J, Liu J, Mortellaro A, Wang DY, Poidinger M, Larbi A, Zolezzi F, Rotzschke O. Genome-wide analysis of the genetic regulation of gene expression in human neutrophils. Nat Commun 2015; 6:7971. [PMID: 26259071 PMCID: PMC4918343 DOI: 10.1038/ncomms8971] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 07/01/2015] [Indexed: 02/01/2023] Open
Abstract
Neutrophils are an abundant immune cell type involved in both antimicrobial defence and autoimmunity. The regulation of their gene expression, however, is still largely unknown. Here we report an eQTL study on isolated neutrophils from 114 healthy individuals of Chinese ethnicity, identifying 21,210 eQTLs on 832 unique genes. Unsupervised clustering analysis of these eQTLs confirms their role in inflammatory responses and immunological diseases but also indicates strong involvement in dermatological pathologies. One of the strongest eQTL identified (rs2058660) is also the tagSNP of a linkage block reported to affect leprosy and Crohn's disease in opposite directions. In a functional study, we can link the C allele with low expression of the β-chain of IL18-receptor (IL18RAP). In neutrophils, this results in a reduced responsiveness to IL-18, detected both on the RNA and protein level. Thus, the polymorphic regulation of human neutrophils can impact beneficial as well as pathological inflammatory responses. Neutrophils are abundant immune cells important for antimicrobial defence and in autoimmunity. Here, by mapping expression quantitative trait loci (eQTL) in neutrophils of Chinese ethnicity from Singapore, Andiappan et al. provide a resource for understanding immune-related trait associated genetic variants.
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Affiliation(s)
- Anand Kumar Andiappan
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Rossella Melchiotti
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Tuang Yeow Poh
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Michelle Nah
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Kia Joo Puan
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Elena Vigano
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Doreen Haase
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Nurhashikin Yusof
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Boris San Luis
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Josephine Lum
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Dilip Kumar
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Shihui Foo
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Li Zhuang
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Anusha Vasudev
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Astrid Irwanto
- Department of Human Genetics, Genome institute of Singapore (GIS), Singapore, Singapore
| | - Bernett Lee
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Alessandra Nardin
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Hong Liu
- Shandong Provincial Hospital for Skin Diseases, Shandong University, Jinan, Shandong, China.,Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, Shandong, China.,School of Medicine, Shandong University, Shandong Provincial Medical Center for Dermatovenereology, Jinan, Shandong, China.,Shandong Provincial Institute of Dermatology and Venereology, Provincial Academy of Medical Science, Jinan, Shandong, China
| | - Furen Zhang
- Shandong Provincial Hospital for Skin Diseases, Shandong University, Jinan, Shandong, China.,Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, Shandong, China.,School of Medicine, Shandong University, Shandong Provincial Medical Center for Dermatovenereology, Jinan, Shandong, China.,Shandong Provincial Institute of Dermatology and Venereology, Provincial Academy of Medical Science, Jinan, Shandong, China
| | - John Connolly
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Jianjun Liu
- Department of Human Genetics, Genome institute of Singapore (GIS), Singapore, Singapore.,School of Life Sciences, Anhui Medical University, Hefei, Anhui, China
| | - Alessandra Mortellaro
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - De Yun Wang
- Department of Otolaryngology, National University of Singapore, Singapore
| | - Michael Poidinger
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Anis Larbi
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Francesca Zolezzi
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
| | - Olaf Rotzschke
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), #04-06, 8A Biomedical Grove, Singapore, Singapore
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16
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Balachander A, Nabti S, Sobota RM, Foo S, Zolezzi F, Lee BTK, Poidinger M, Ricciardi-Castagnoli P. Dendritic cell derived IL-2 inhibits survival of terminally mature cells via an autocrine signaling pathway. Eur J Immunol 2015; 45:1494-9. [PMID: 25652593 DOI: 10.1002/eji.201445050] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 01/06/2015] [Accepted: 01/30/2015] [Indexed: 01/22/2023]
Abstract
DCs are crucial for sensing pathogens and triggering immune response. Upon activation by pathogen-associated molecular pattern (PAMP) ligands, GM-CSF myeloid DCs (GM-DCs) secrete several cytokines, including IL-2. DC IL-2 has been shown to be important for innate and adaptive immune responses; however, IL-2 importance in DC physiology has never been demonstrated. Here, we show that autocrine IL-2 signaling is functional in murine GM-DCs in an early time window after PAMPs stimulation. IL-2 signaling selectively activates the JAK/STAT5 pathway by assembling holo-receptor complexes at the cell surface. Using the sensitivity of targeted mass spectrometry, we show conclusively that GM-DCs express CD122, the IL-2 receptor β-chain, at steady state. In myeloid DCs, this cytokine pathway inhibits survival of PAMP-matured GM-DCs which is crucial for maintaining immune tolerance and preventing autoimmunity. Our findings suggest that immune regulation by this novel autocrine signaling pathway can potentially be used in DC immunotherapy.
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Affiliation(s)
- Akhila Balachander
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Sabrina Nabti
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Radoslaw M Sobota
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Shihui Foo
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Francesca Zolezzi
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Bernett T K Lee
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Michael Poidinger
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
| | - Paola Ricciardi-Castagnoli
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), Singapore, Singapore
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17
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Lwin MO, Vijaykumar S, Lim G, Theng YL, Foo S. 'It's effective but should I bother?' A study of personal protection measures against Malaria in urban India. Public Health 2014; 128:654-64. [PMID: 25065519 DOI: 10.1016/j.puhe.2014.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 03/11/2014] [Accepted: 03/11/2014] [Indexed: 10/25/2022]
Abstract
OBJECTIVES Malaria affects millions of people in urban and rural India every year. This study addresses two main gaps in current research: 1) attitudes towards personal protective strategies against Malaria among urban populations; and 2) understanding of the extent to which urban health information seeking preferences shape preventive behaviours. STUDY DESIGN Cross-sectional face-to-face surveys using stratified sampling design. METHODS A 60-min survey was carried out to 1000 middle-of-pyramid (MOP) population in five main cities in India by trained interviewers. Variables assessed included perceived effectiveness and actual practice of 14 scientific and indigenous personal protection methods, Malaria-related attitudes (susceptibility, severity and response efficacy) and health information seeking preferences. RESULTS Actual practice of Malaria preventive behaviours was found to be significantly lower than the perceived effectiveness of each of the fourteen scientific and indigenous methods. Television, newspapers, and mobile phones were reported as the top three preferred media for seeking public health information. Lastly, perceived susceptibility, response efficacy, and health-related media use were found to play significant roles in predicting actual practice behaviours. CONCLUSIONS Our study highlights a need for health authorities to focus on translating positive attitudes to actual practice of preventive behaviours. Communication efforts may focus on the use of TV, newspapers and mobile phones for greater reach and efficacy. Other implications for Malaria prevention programs are discussed.
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Affiliation(s)
- M O Lwin
- Center of Social Media Innovations for Communities (COSMIC), Nanyang Technological University, Singapore
| | - S Vijaykumar
- Center of Social Media Innovations for Communities (COSMIC), Nanyang Technological University, Singapore.
| | - G Lim
- Center of Social Media Innovations for Communities (COSMIC), Nanyang Technological University, Singapore
| | - Y L Theng
- Center of Social Media Innovations for Communities (COSMIC), Nanyang Technological University, Singapore
| | - S Foo
- Center of Social Media Innovations for Communities (COSMIC), Nanyang Technological University, Singapore
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18
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Thompson V, Frentzas S, Vermeulen P, Foo S, Eltahir Z, Brown G, Cunningham D, Reynolds A. 32: Proffered Paper: Vessel co-option in colorectal cancer liver metastases mediates resistance to conventional anti-angiogenic therapy. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)50032-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Foo S, Cheng S, Varma S, Kulkarni K. Sequestrated meningocoele within a naevus sebaceous of Jadassohn on the scalp of a child. Clin Exp Dermatol 2014; 39:304-6. [PMID: 24635065 DOI: 10.1111/ced.12279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2013] [Indexed: 11/28/2022]
Abstract
Sequestrated meningocoele is an uncommon developmental anomaly in which meningothelial elements are found in the skin or subcutaneous tissue without underlying bony defect. By contrast, naevus sebaceous of Jadassohn (NSJ) is a circumscribed hamartomatous lesion occurring in about 0.3% of newborns. We report a child with a histologically confirmed sequestrated meningocoele within an NSJ on his scalp vertex. Such an occurrence has not been reported previously.
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Affiliation(s)
- S Foo
- Department of Dermatology, Nottingham University Hospitals, Queens Medical Centre, Nottingham, UK
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21
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Choo WS, Foo S, Tan E, Thayaparan FST, Chung YY, Raman S, Shaariah W, Chin SP. Acute stroke patients with high BMI are less likely to have severe disability at initial presentation. Med J Malaysia 2009; 64:34-36. [PMID: 19852318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This is a prospective study to determine the severity of disability and prognosis of acute stroke patients related to their Body Mass index (BMI). A total of 79 consecutive CT-scan-proven acute stroke patients who were admitted to Hospital Tuanku Ja'afar, Seremban between November 2006 and April 2007 were recruited (male:female 49:30; mean age 62.7 years; ischemic stroke 70, intracerebral bleed 9). The patients were divided according to BMI less than 25 (Group A) and equal or greater than 25 (Group B). Severity of disability was measured between 24-48 hours by modified Rankin's score. Patients were followed up after one month. Thirty-seven patients had severe disability (Rankin Score 5). Twenty-nine patients had adverse outcomes including 11 deaths and 18 rehospitalizations or prolonged hospital/nursing home stay. 34.3% of Group B had severe disability compared to 56.8% of Group A (chi2 P = 0.046). Conversely 42.9% of Group B had adverse events at one month compared to 31.8% of Group A (chi2 P = 0.312). There were no statistical differences between high- and low-BMI groups for gender ratio, smoking, hypertension, diabetes, prior cardiovascular disease, mean age, mean lipid profile and blood pressure. When comparing patients with Rankin Score 1-4 versus 5, age and BMI were statistically significant between the two groups. By multivariate analysis only age is independent predictor for severe disability (P < 0.05). The results of this pilot study should be confirmed in larger prospective multicentre trial.
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Affiliation(s)
- W S Choo
- Department of Medicine, Hospital Tuanku Ja'afar, Seremban.
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22
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Schor AM, Ellis IR, Jones SJ, Perrier S, Florence MM, Cox J, Ohe G, Kankova K, Vojtesek B, Thompson AM, Purdie C, Kazmi S, Foo S, Woolston AM, Schor SL. Identification and role of migration stimulating factor isoforms in breast carcinomas. Breast Cancer Res 2008. [PMCID: PMC3300769 DOI: 10.1186/bcr1950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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23
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Compagni A, Foo S, Logan M, Klein R, Adams R. 21 Eph receptors and ephrins control the morphogenesis of limbs and blood vessels. J Anat 2002; 201:423. [PMID: 17103767 PMCID: PMC1570957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023] Open
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25
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26
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27
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Foo S. Clinical characteristics of stroke among chinese patients. Am J Hypertens 2000. [DOI: 10.1016/s0895-7061(00)00917-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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28
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Hui S, Foo S, Yeo C. Integrating Internet with PSTN networks for voice services. IJCAT 1999. [DOI: 10.1504/ijcat.1999.000198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
We retrospectively analyzed the clinical manifestations of complex partial seizures (CPS) in children aged < or = 10 years using video and EEG telemetry and evaluated their course, investigations, management, and seizure status at follow-up. Seventeen patients with CPS were studied at the Prince of Wales Children's Hospital (POWCH) and Prince Henry Hospital (PHH) between 1987 and 1992. Because 15 of the 17 patients had intractable seizures, the population was selective. Mean age was 6.5 years; 4 patients were aged < or = 2 years. Clinical features were normal or mild intellectual handicap (13); hemiplegia (5); and infantile spasms preceding CPS (4); of these, 2 also had simple partial motor seizures. Structural abnormalities were noted on scanning in 9 patients. Eighty-seven seizures were reviewed. Mean duration of each clinical seizure was 59.7 s (total population), 108 s (subgroup 1, aged < or = 2 years), and 48.5 s (subgroup 2, aged > 2 years). Major ictal manifestations were auras (9), staring (9), autonomic changes (6), and automatisms (17). In subgroup 1, automatisms were simple and mainly oroalimentary and gestural. Two patients had no change in surface ictal recordings, and 2 had normal interictal EEGs. At follow-up, 8 patients were seizure-free for 6 months, 1 was partially controlled (more than two seizures a month), and 8 had intractable seizures (two or more seizures a month). Seven patients underwent operation for intractable epilepsy, and 4 achieved a class 1A outcome (Engel classification).
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Affiliation(s)
- A M Bye
- Department of Paediatric Neurology, Prince of Wales Children's Hospital, Randwick, New South Wales, Australia
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30
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Abstract
A simplified pressure method has been developed for fit testing air-purifying respirators. In this method, the air-purifying cartridges are replaced by a pressure-sensing attachment and a valve. While wearers hold their breath, a small pump extracts air from the respirator cavity until a steady-state pressure is reached in 1 to 2 sec. The flow rate through the face seal leak is a unique function of this pressure, which is determined once for all respirators, regardless of the respirator's cavity volume or deformation because of pliability. The contaminant concentration inside the respirator depends on the degree of dilution by the flow through the cartridges. The cartridge flow varies among different brands and is measured once for each brand. The ratio of cartridge to leakflow is a measure of fit. This flow ratio has been measured on human subjects and has been compared to fit factors determined on the same subjects by means of photometric and particle count tests. The aerosol tests gave higher values of fit.
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Affiliation(s)
- D Han
- Department of Environmental Health, University of Cincinnati, OH 45267-0056
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