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Koh MCY, Tambyah PA, Liau MM, Wong SBJ, Tan KB. A Dermatomal Rash: Challenge. Am J Dermatopathol 2024; 46:e16-e17. [PMID: 38354388 DOI: 10.1097/dad.0000000000002623] [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] [Indexed: 02/16/2024]
Affiliation(s)
- Matthew Chung Yi Koh
- Division of Infectious Diseases, Department of Medicine, National University Health System, Singapore
| | - Paul Anantharajah Tambyah
- Division of Infectious Diseases, Department of Medicine, National University Health System, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - MeiQi May Liau
- Division of Dermatology, Department of Medicine, National University Health System, Singapore; and
| | - Soon Boon Justin Wong
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pathology, National University Health System, Singapore
| | - Kong-Bing Tan
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pathology, National University Health System, Singapore
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Koh MCY, Tambyah PA, Liau MM, Wong SBJ, Tan KB. A Dermatomal Rash: Answer. Am J Dermatopathol 2024; 46:179-180. [PMID: 38354384 DOI: 10.1097/dad.0000000000002624] [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] [Indexed: 02/16/2024]
Affiliation(s)
- Matthew Chung Yi Koh
- Division of Infectious Diseases, Department of Medicine, National University Health System, Singapore
| | - Paul Anantharajah Tambyah
- Division of Infectious Diseases, Department of Medicine, National University Health System, Singapore
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Infectious Diseases Translational Research Programme, Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - MeiQi May Liau
- Division of Dermatology, Department of Medicine, National University Health System, Singapore; and
| | - Soon Boon Justin Wong
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pathology, National University Health System, Singapore
| | - Kong-Bing Tan
- Yong Loo Lin School of Medicine, National University of Singapore, Singapore
- Department of Pathology, National University Health System, Singapore
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Wijaya S, Loh J, Lim D, Wong SBJ, Low J, Ng J, Tong P, Ilancheran A, Lim YW, Lim SE, Ngoi N, Tan D. Corrigendum to “Chemotherapy response score (CRS) as a surrogate marker for homologous recombination deficiency (HRD) based on loss of heterozygosity (LOH) in high grade serous ovarian cancer (HGSOC) (165)” [Gynecologic Oncology Volume 166, Supplement 1, August 2022, Page S98]. Gynecol Oncol 2023. [DOI: 10.1016/j.ygyno.2023.02.007] [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: 03/11/2023]
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Phua JJM, Wong SBJ, Chandran NS, Liau MM. Nevoid telangiectasia patches in a 17-year-old boy. JAAD Case Rep 2022; 30:105-107. [DOI: 10.1016/j.jdcr.2022.10.011] [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: 11/06/2022] Open
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Wijaya S, Loh J, Lim D, Wong SBJ, Low J, Ng J, Tong P, Ilancheran A, Lim YW, Lim SE, Wijaya S, Tan D. Chemotherapy response score (CRS) as a surrogate marker for homologous recombination deficiency (HRD) based on loss of heterozygosity (LOH) in high grade serous ovarian cancer (HGSOC) (165). Gynecol Oncol 2022. [DOI: 10.1016/s0090-8258(22)01392-0] [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: 11/28/2022]
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Liang M, Bernadt C, Wong SBJ, Choi C, Cote R, Yang C. All-in-focus fine needle aspiration biopsy imaging based on Fourier ptychographic microscopy. J Pathol Inform 2022; 13:100119. [PMID: 36268073 PMCID: PMC9577034 DOI: 10.1016/j.jpi.2022.100119] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2021] [Indexed: 11/23/2022] Open
Abstract
Context Cytology is the study of whole cells in diagnostic pathology. Unlike standard histologic thinly sliced specimens, cytologic preparations consist of preparations of whole cells where cells commonly cluster and aggregate. As such, cytology preparations are generally much thicker than histologic slides, resulting in large patches of defocus when examined under the microscope. A diagnostic aggregate of cells often cannot be viewed in focus together, requiring pathologists to continually manipulate the focal plane, complicating the task of accurately assessing the entire cellular aggregate and thus in making a diagnosis. Further, it is extremely difficult to acquire useful uniformly in-focus digital images of cytology preparations for applications such as remote diagnostic evaluations and artificial intelligence models. The predominant current method to address this issue is to acquire digital images at multiple focal planes of the entire slide, which demands long scanning time, complex and expensive scanning systems, and huge storage capacity. Aims Here we report a unique imaging method that can acquire cytologic images efficiently and computationally render all-in-focus digital images that are highly compact. Methods and material This method applies a metric-based digital refocusing to microscopy data collected with a Fourier ptychographic microscope (FPM). The digitally refocused patches of images are then synthesized into an all-in-focus image. Results We report all-in-focus FPM results of thyroid fine needle aspiration (FNA) cytology samples, demonstrating our method’s ability to overcome the height variance of 30 μm caused by cell aggregation, and rendering images at high resolution (corresponds to a standard microscope with objective NA of 0.75) and that are all-in-focus. Conclusions This technology is applicable to standard microscopes, and we believe can have an impact on diagnostic accuracy as well as ease and speed of diagnosing challenging specimens. While we focus on cytology slides here, we anticipate this technology’s advantages will translate well for histology applications. This technique also addresses the issue of remote rapid evaluation of cytology preparations. Finally, we believe that by resolving the focus heterogeneity issues in standard digital images, this technique is a critical advance for applying machine learning to cytology specimens.
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Tan NJH, Tay KXJ, Wong SBJ, Nga ME. COVID-19 post-vaccination lymphadenopathy: Report of cytological findings from fine needle aspiration biopsy. Diagn Cytopathol 2021; 49:E467-E470. [PMID: 34432391 PMCID: PMC8652983 DOI: 10.1002/dc.24863] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 06/19/2021] [Revised: 08/04/2021] [Accepted: 08/19/2021] [Indexed: 11/09/2022]
Abstract
The coronavirus COVID-19 pandemic has spurred the rapid development of vaccines, with vaccination programmes already underway in many countries. Regional lymphadenopathy is one of the documented side effects of vaccination. We document the fine needle aspiration cytological findings of an enlarged supraclavicular lymph node in a 34-year-old Asian female following the first dose of the Pfizer-BioNTech COVID-19 mRNA vaccine, which appears to be the first such report in a premorbidly well patient with no known history of malignancy. The cytological findings featured a reactive pattern in keeping with follicular hyperplasia, with prominent germinal centre elements including lymphohistiocytic aggregates and tingible-body macrophages. Despite an increased proportion of larger lymphocytes, the overall pattern was in keeping with a reactive pattern, bearing in mind the temporal and geographic relation to the vaccination injection. In instances of localised lymphadenopathy, particularly in supraclavicular or axillary locations, pathologists should be cognizant of the possibility of post-vaccination reactive lymphadenopathy, and seek clinical and radiological hints favouring a benign process, whilst recognising potential morphological overlaps with lymphoproliferative disorders. Awareness of this diagnostic pitfall is especially important as COVID-19 vaccination coverage is ramped up worldwide, leading to an expected increase in incidence of post-vaccination reactive lymphadenopathy.
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Affiliation(s)
- Nicholas Jin Hong Tan
- Department of PathologyNational University Hospital, National University Health SystemSingaporeSingapore
| | - Kai Xun Joshua Tay
- Department of Otolaryngology ‐ Head & Neck Surgery (ENT)National University of SingaporeSingaporeSingapore
| | - Soon Boon Justin Wong
- Department of PathologyNational University Hospital, National University Health SystemSingaporeSingapore
| | - Min En Nga
- Department of PathologyNational University Hospital, National University Health SystemSingaporeSingapore
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Mir SA, Wong SBJ, Narasimhan K, Esther CWL, Ji S, Burla B, Wenk MR, Tan DSP, Bendt AK. Lipidomic Analysis of Archival Pathology Specimens Identifies Altered Lipid Signatures in Ovarian Clear Cell Carcinoma. Metabolites 2021; 11:metabo11090597. [PMID: 34564414 PMCID: PMC8469522 DOI: 10.3390/metabo11090597] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 07/15/2021] [Revised: 08/26/2021] [Accepted: 09/01/2021] [Indexed: 11/16/2022] Open
Abstract
Cancer metabolism is associated with the enhanced lipogenesis required for rapid growth and proliferation. However, the magnitude of dysregulation of diverse lipid species still requires significant characterization, particularly in ovarian clear cell carcinoma (OCCC). Here, we have implemented a robust sample preparation workflow together with targeted LC-MS/MS to identify the lipidomic changes in formalin-fixed paraffin-embedded specimens from OCCC compared to tumor-free ovarian tissue. We quantitated 340 lipid species, representing 28 lipid classes. We observed differential regulation of diverse lipid species belonging to several glycerophospholipid classes and trihexosylceramide. A number of unsaturated lipid species were increased in OCCC, whereas saturated lipid species showed a decrease in OCCC compared to the controls. We also carried out total fatty acid analysis and observed an increase in the levels of several unsaturated fatty acids with a concomitant increase in the index of stearoyl-CoA desaturase (SCD) in OCCC. We confirmed the upregulation of SCD (the rate-limiting enzyme for the synthesis of monounsaturated fatty acids) by immunohistochemistry (IHC) assays. Hence, by carrying out a mass spectrometry analysis of archival tissue samples, we were able to provide insights into lipidomic alterations in OCCC.
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Affiliation(s)
- Sartaj Ahmad Mir
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore 117456, Singapore; (C.W.L.E.); (S.J.); (B.B.); (M.R.W.); (A.K.B.)
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117596, Singapore
- Correspondence: (S.A.M.); (S.B.J.W.)
| | - Soon Boon Justin Wong
- Department of Pathology, National University Hospital, Singapore 119074, Singapore
- Correspondence: (S.A.M.); (S.B.J.W.)
| | - Kothandaraman Narasimhan
- Singapore Institute for Clinical Sciences, A*STAR, 30 Medical Drive, Singapore 117609, Singapore;
| | - Chua W. L. Esther
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore 117456, Singapore; (C.W.L.E.); (S.J.); (B.B.); (M.R.W.); (A.K.B.)
| | - Shanshan Ji
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore 117456, Singapore; (C.W.L.E.); (S.J.); (B.B.); (M.R.W.); (A.K.B.)
| | - Bo Burla
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore 117456, Singapore; (C.W.L.E.); (S.J.); (B.B.); (M.R.W.); (A.K.B.)
| | - Markus R. Wenk
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore 117456, Singapore; (C.W.L.E.); (S.J.); (B.B.); (M.R.W.); (A.K.B.)
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117596, Singapore
| | - David S. P. Tan
- National University Cancer Institute, National University Hospital, Singapore 119074, Singapore;
- Cancer Science Institute, National University of Singapore, Singapore 117599, Singapore
| | - Anne K. Bendt
- Singapore Lipidomics Incubator, Life Sciences Institute, National University of Singapore, Singapore 117456, Singapore; (C.W.L.E.); (S.J.); (B.B.); (M.R.W.); (A.K.B.)
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Choi EC, Wong SBJ, Ho SAJ. Idiopathic Granulomatous Mastitis and Erythema nodosum - A Unifying Pathophysiology? Australas J Dermatol 2020; 62:e149-e153. [PMID: 32935853 DOI: 10.1111/ajd.13463] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 07/29/2020] [Accepted: 08/07/2020] [Indexed: 12/30/2022]
Affiliation(s)
- Ellie Ce Choi
- Division of Dermatology, Department of Medicine, National University Healthcare System, Singapore, Singapore
| | | | - Sue-Ann Je Ho
- Division of Dermatology, Department of Medicine, National University Healthcare System, Singapore, Singapore
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Wong SBJ, Nga ME, Michal M, Vanecek T, Seet JE, Petersson F. SOX11 expression in a case of papillary thyroid carcinoma with fibromatosis/fasciitis-like stroma containing BRAF c.1799_1801delTGA and CTNNB1 c.133T>C mutations. Virchows Arch 2019; 475:519-525. [PMID: 31327063 DOI: 10.1007/s00428-019-02619-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 02/27/2019] [Revised: 06/06/2019] [Accepted: 07/09/2019] [Indexed: 10/26/2022]
Abstract
We describe a case of papillary thyroid carcinoma with fibromatosis/fasciitis-like stroma (PTC-FLS) that contained the rare BRAF c.1799_1801delTGA (p.V600_K601delinsE) mutation, which has not previously been reported in this tumour, as well as the CTNNB1 c.133T>C (p.S45P) mutation. We also report the novel observation that spindle cells of the mesenchymal component exhibit diffuse nuclear but not cytoplasmic expression of SOX11, whereas the malignant epithelial cells did not. This suggests that immunoreactivity for SOX11 can be an alternative diagnostic tool for evaluating cases of PTC-FLS where the nuclear expression of β-catenin is ambiguous.
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Affiliation(s)
- Soon Boon Justin Wong
- Department of Pathology, National University Hospital, Singapore, Singapore.,Department of Microbiology and Immunology, National University of Singapore, Singapore, Singapore
| | - Min En Nga
- Department of Pathology, National University Hospital, Singapore, Singapore
| | - Michal Michal
- Department of Pathology, Faculty of Medicine in Plzen, Charles University, Plzen, Czech Republic
| | - Tomas Vanecek
- Molecular and Genetic Laboratory, Biopticka Laboratory Ltd., Plzen, Czech Republic
| | - Ju Ee Seet
- Department of Pathology, National University Health System, 5 Lower Kent Ridge Road, Singapore, 119074, Singapore
| | - Fredrik Petersson
- Department of Pathology, National University Hospital, Singapore, Singapore. .,Department of Pathology, National University Health System, 5 Lower Kent Ridge Road, Singapore, 119074, Singapore.
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Low HB, Png CW, Li C, Wang DY, Wong SBJ, Zhang Y. Monocyte-derived factors including PLA2G7 induced by macrophage-nasopharyngeal carcinoma cell interaction promote tumor cell invasiveness. Oncotarget 2018; 7:55473-55490. [PMID: 27487154 PMCID: PMC5342430 DOI: 10.18632/oncotarget.10980] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 01/27/2016] [Accepted: 06/29/2016] [Indexed: 02/07/2023] Open
Abstract
The non-keratinizing undifferentiated subtype of nasopharyngeal carcinoma (NPC) is a malignancy characterized by an intimate relationship between neoplastic cells and a non-neoplastic lymphoid component. Tumor-associated macrophages (TAMs) foster tumor progression through production of soluble mediators that support proliferation, angiogenesis, survival and invasion of malignant cells. However, the role of macrophages in the progression of NPC remains poorly understood. This study aims to investigate the functional and phenotypic changes that occur to macrophages in macrophage-NPC cell co-culture systems, and how these changes influence tumor cells. We found that monocytes, including THP-1 cells and primary human monocytes, co-cultured with C666-1 NPC cells upregulate expression of pro-inflammatory cytokines at the early stages, followed by the induction of metastasis-related genes and interferon-stimulated genes at the later stage of coculture, indicating that TAMs are “educated” by NPC cells for cancer progression. Importantly, the induction of these factors from the TAMs was also found to enhance the migratory capabilities of the NPC cells. We have also identified one of these macrophage-derived factor, phospholipase A2 Group 7 (PLA2G7), to be important in regulating tumor cell migration and a novel tumor-promoting factor in NPC. Further studies to characterize the role of PLA2G7 in tumor metastasis may help determine its potential as a therapeutic target in NPC.
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Affiliation(s)
- Heng Boon Low
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore.,Immunology Programme, The Life Science Institute, National University of Singapore, Singapore 117597, Singapore
| | - Chin Wen Png
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore.,Immunology Programme, The Life Science Institute, National University of Singapore, Singapore 117597, Singapore
| | - Chunwei Li
- Department of Otorhinolaryngology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510080, China
| | - De Yun Wang
- Department of Otolaryngology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117597, Singapore
| | - Soon Boon Justin Wong
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore.,Immunology Programme, The Life Science Institute, National University of Singapore, Singapore 117597, Singapore.,Department of Pathology, National University Hospital, Singapore 119074, Singapore
| | - Yongliang Zhang
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Singapore.,Immunology Programme, The Life Science Institute, National University of Singapore, Singapore 117597, Singapore
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Tsai CY, Liong KH, Gunalan MG, Li N, Lim DSL, Fisher DA, MacAry PA, Leo YS, Wong SC, Puan KJ, Wong SBJ. Type I IFNs and IL-18 regulate the antiviral response of primary human γδ T cells against dendritic cells infected with Dengue virus. J Immunol 2015; 194:3890-900. [PMID: 25732728 DOI: 10.4049/jimmunol.1303343] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 01/30/2015] [Indexed: 01/08/2023]
Abstract
Little is known about the cellular mechanisms of innate immunity against dengue virus (DV) infection. Specifically, the γδ T cell response to DV has not been characterized in detail. In this article, we demonstrate that markers of activation, proliferation, and degranulation are upregulated on γδ T cells in PBMC isolated from individuals with acute dengue fever. Primary γδ T cells responded rapidly in vitro to autologous DV-infected dendritic cells by secreting IFN-γ and upregulating CD107a. The anti-DV IFN-γ response is regulated by type I IFN and IL-18 in a TCR-independent manner, and IFN-γ secreting γδ T cells predominantly expressed IL-18Rα. Antagonizing the ATP-dependent P2X7 receptor pathway of inflammasome activation significantly inhibited the anti-DV IFN-γ response of γδ T cells. Overnight priming with IL-18 produced effector γδ T cells with significantly increased ability to lyse autologous DV-infected dendritic cells. Monocytes were identified as accessory cells that augmented the anti-DV IFN-γ response of γδ T cells. Lack of monocytes in culture is associated with lower IL-18 levels in culture supernatant and diminished production of IFN-γ by γδ T cells, whereas addition of exogenous IL-18 restored the IFN-γ response of γδ T cells in monocyte-depleted cocultures with DV-infected DC. Our results indicate that primary γδ T cells contribute to the immune response during DV infection by providing an early source of IFN-γ, as well as by killing DV-infected cells, and suggest that monocytes participate as accessory cells that sense DV infection and amplify the cellular immune response against this virus in an IL-18-dependent manner.
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Affiliation(s)
- Chen-Yu Tsai
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Ka Hang Liong
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Matilda Gertrude Gunalan
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Na Li
- Singapore-MIT Alliance for Research and Technology, Singapore 138602, Republic of Singapore
| | - Daniel Say Liang Lim
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Dale A Fisher
- Division of Infectious Diseases, National University Hospital, Singapore 119074, Republic of Singapore; Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119228, Republic of Singapore
| | - Paul A MacAry
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore; Immunology Programme, Life Science Institute, National University of Singapore, Singapore 117456, Republic of Singapore
| | - Yee Sin Leo
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore 308433, Republic of Singapore
| | - Siew-Cheng Wong
- Singapore Immunology Network, Agency for Science Technology and Research, Singapore 138648, Republic of Singapore; and
| | - Kia Joo Puan
- Singapore Immunology Network, Agency for Science Technology and Research, Singapore 138648, Republic of Singapore; and
| | - Soon Boon Justin Wong
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore; Immunology Programme, Life Science Institute, National University of Singapore, Singapore 117456, Republic of Singapore; Department of Pathology, National University Hospital, Singapore 119074, Republic of Singapore
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Lim DSL, Yawata N, Selva KJ, Li N, Tsai CY, Yeong LH, Liong KH, Ooi EE, Chong MK, Ng ML, Leo YS, Yawata M, Wong SBJ. The combination of type I IFN, TNF-α, and cell surface receptor engagement with dendritic cells enables NK cells to overcome immune evasion by dengue virus. J Immunol 2014; 193:5065-75. [PMID: 25320280 DOI: 10.4049/jimmunol.1302240] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Clinical studies have suggested the importance of the NK cell response against dengue virus (DenV), an arboviral infection that afflicts >50 million individuals each year. However, a comprehensive understanding of the NK cell response against dengue-infected cells is lacking. To characterize cell-contact mechanisms and soluble factors that contribute to the antidengue response, primary human NK cells were cocultured with autologous DenV-infected monocyte-derived dendritic cells (DC). NK cells responded by cytokine production and the lysis of target cells. Notably, in the absence of significant monokine production by DenV-infected DC, it was the combination of type I IFNs and TNF-α produced by DenV-infected DC that was important for stimulating the IFN-γ and cytotoxic responses of NK cells. Cell-bound factors enhanced NK cell IFN-γ production. In particular, reduced HLA class I expression was observed on DenV-infected DC, and IFN-γ production was enhanced in licensed/educated NK cell subsets. NK-DC cell contact was also identified as a requirement for a cytotoxic response, and there was evidence for both perforin/granzyme as well as Fas/Fas ligand-dependent pathways of killing by NK cells. In summary, our results have uncovered a previously unappreciated role for the combined effect of type I IFNs, TNF-α, and cell surface receptor-ligand interactions in triggering the antidengue response of primary human NK cells.
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Affiliation(s)
- Daniel Say Liang Lim
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Nobuyo Yawata
- Infection and Immunity Programme, Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore 117609, Republic of Singapore; Singapore Eye Research Institute, Singapore 168751, Republic of Singapore; Office of Clinical Sciences, Duke-National University of Singapore Graduate Medical School, Singapore 169857, Republic of Singapore
| | - Kevin John Selva
- Infection and Immunity Programme, Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore 117609, Republic of Singapore
| | - Na Li
- Singapore-Massachusetts Institute of Technology Alliance for Research and Technology, Singapore 138602, Republic of Singapore
| | - Chen Yu Tsai
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Lai Han Yeong
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Ka Hang Liong
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Eng Eong Ooi
- Program in Emerging Infectious Diseases, Duke-National University of Singapore Graduate Medical School, Singapore 169857, Republic of Singapore
| | - Mun Keat Chong
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Mah Lee Ng
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore
| | - Yee Sin Leo
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore 308433, Republic of Singapore
| | - Makoto Yawata
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore; Infection and Immunity Programme, Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research, Singapore 117609, Republic of Singapore; Singapore Eye Research Institute, Singapore 168751, Republic of Singapore; Department of Pediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119074, Republic of Singapore;
| | - Soon Boon Justin Wong
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 117545, Republic of Singapore; Immunology Programme, Life Science Institute, National University of Singapore, Singapore 117456, Republic of Singapore; and Department of Pathology, National University Hospital, Singapore 119074, Republic of Singapore
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Serelli-Lee V, Ling KL, Ho C, Yeong LH, Lim GK, Ho B, Wong SBJ. Persistent Helicobacter pylori specific Th17 responses in patients with past H. pylori infection are associated with elevated gastric mucosal IL-1β. PLoS One 2012; 7:e39199. [PMID: 22761739 PMCID: PMC3382622 DOI: 10.1371/journal.pone.0039199] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 05/16/2012] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Ongoing Helicobacter pylori (HP) infection triggers a chronic active gastritis. Eradicating HP reduces gastric inflammation, but does not eliminate it. We sought to characterize this persistent gastritis, and demonstrate the persistence of HP-specific Th17 responses in individuals previously infected with HP but who no longer had evidence of ongoing infection. METHODOLOGY/PRINCIPAL FINDINGS Study subjects were divided into 3 groups 55 individuals had active HP infection (group A), 41 were diagnosed with previous HP infection (group P), and 59 were naïve to HP (group N). Blood and gastric tissue were obtained with written informed consent from all subjects, and immune responses were evaluated using flow cytometry, semi-quantitative real time PCR, immunofluorescent staining, ELISA, and multiplex cytometric bead array for cytokine quantification. Elevated IL-17A responses were observed in patients from group A compared to group N. Interestingly, IL-17A responses remained persistently elevated in the blood and gastric mucosa of individuals from group P, despite the absence of ongoing HP infection. Using purified CD4(+) T cells as effectors and antibodies that blocked antigen presentation by MHC Class II, we showed that these persistent IL-17A responses were mediated primarily by HP-specific Th17 cells, rather than other immune cells that have also been described to secrete IL-17A. Gastric mucosal IL-1β levels were also persistently elevated in group P, and neutralisation of IL-1β reduced the HP-specific IL-17A response of purified CD4(+) T cells to autologous HP-pulsed antigen presenting cells in vitro, suggesting a functional association between IL-1β and the persistent Th17 response in group P patients. CONCLUSIONS/SIGNIFICANCE Despite lack of ongoing HP infection, HP-specific Th17 cells persist in the blood and gastric mucosa of individuals with past HP infection. We speculate that this persistent inflammation might contribute to gastric mucosal pathology, for example, persistent increased gastric cancer risk despite eradication of HP.
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Affiliation(s)
- Victoria Serelli-Lee
- Department of Microbiology, National University of Singapore, Singapore, Republic of Singapore
| | - Khoon Lin Ling
- Department of Gastroenterology and Hepatology, Singapore General Hospital, Singapore, Republic of Singapore
| | - Cassandra Ho
- Department of Microbiology, National University of Singapore, Singapore, Republic of Singapore
| | - Lai Han Yeong
- Department of Microbiology, National University of Singapore, Singapore, Republic of Singapore
| | - Gek Keow Lim
- Department of Gastroenterology and Hepatology, Singapore General Hospital, Singapore, Republic of Singapore
| | - Bow Ho
- Department of Microbiology, National University of Singapore, Singapore, Republic of Singapore
| | - Soon Boon Justin Wong
- Department of Microbiology, National University of Singapore, Singapore, Republic of Singapore
- Immunology Programme, National University of Singapore, Singapore, Republic of Singapore
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Lim D, Ooi EE, Li N, Yeong LH, Wong SBJ. Response of human natural killer cells to monocyte-derived dendritic cells infected with dengue virus (67.10). The Journal of Immunology 2011. [DOI: 10.4049/jimmunol.186.supp.67.10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
Natural Killer (NK) cells are involved in innate responses triggered early during viral infections. However, the factors that regulate the response of primary human NK cells to primary human cells infected with dengue virus (DV) remain poorly characterized. In this study, we demonstrate that naïve NK cells co-cultured with DV-infected monocyte-derived dendritic cells (DCs) produce IFN-γ, upregulate cell surface CD107a, and lyse DV-infected DCs. Type I interferons and TNF-α produced by the DV-infected DCs were crucial for this IFN-γ response, since blocking IFNAR combined with neutralization of TNF-α completely abolished the IFN-γ response in these co-cultures. Cytokines previously reported to play important roles in NK cell activation, e.g. IL-12, IL-15, IL-18, IL-21, and IL-27, were not produced in significant amounts by DV-infected DCs. Transwell experiments suggested that membrane-bound ligands were also important for NK cell recognition of DV-infected DCs. However, we failed to detect the upregulation of ligands for NKG2D or DNAM-1 on DV-infected DCs. Ligands for the natural cytotoxicity receptors were determined not to contribute to the IFN-γ response. In summary, our results have uncovered a previously unappreciated role for the synergy between type I interferons and TNF-α in triggering the anti-dengue response of naïve human NK cells.
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Affiliation(s)
- Daniel Lim
- 1Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Eng Eong Ooi
- 2Program in Emerging Infectious Diseases, Duke-NUS Graduate Medical School, Singapore, Singapore
| | - Na Li
- 1Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- 3Singapore-MIT Alliance for Research and Technology, Singapore, Singapore
| | - Lai Han Yeong
- 1Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Soon Boon Justin Wong
- 1Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
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