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Li X, Liao C, Wu J, Yi B, Zha R, Deng Q, Xu J, Guo C, Lu J. Distinct serum exosomal miRNA profiles detected in acute and asymptomatic dengue infections: A community-based study in Baiyun District, Guangzhou. Heliyon 2024; 10:e31546. [PMID: 38807894 PMCID: PMC11130723 DOI: 10.1016/j.heliyon.2024.e31546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 05/16/2024] [Accepted: 05/17/2024] [Indexed: 05/30/2024] Open
Abstract
Background In recent years, research on exosomal miRNAs has provided new insights into exploring the mechanism of viral infection and disease prevention. This study aimed to investigate the serum exosomal miRNA expression profile of dengue-infected individuals through a community survey of dengue virus (DENV) infection. Methods A seroprevalence study of 1253 healthy persons was first conducted to ascertain the DENV infection status in Baiyun District, Guangzhou. A total of 18 serum samples, including 6 healthy controls (HC), 6 asymptomatic DENV infections (AsymptDI), and 6 confirmed dengue fever patients (AcuteDI), were collected for exosome isolation and then sRNA sequencing. Through bioinformatics analysis, we discovered distinct serum exosomal miRNA profiles among the different groups and identified differentially expressed miRNAs (DEMs). These findings were further validated by qRT-PCR. Results The community survey of DENV infection indicated that the DENV IgG antibody positivity rate among the population was 11.97 % in the study area, with asymptomatic infected individuals accounting for 93.06 % of the anti-DENV IgG positives. The age and Guangzhou household registration were associated with DENV IgG antibody positivity by logistic regression analysis. Distinct miRNA profiles were observed between healthy individuals and DENV infections. A total of 1854 miRNAs were identified in 18 serum exosome samples from the initial analysis of the sequencing data. Comparative analysis revealed 23 DEMs comprising 5 upregulated and 18 downregulated miRNAs in the DENV-infected group (mergedDI). In comparison to AcuteDI, 18 upregulated miRNAs were identified in AsymptDI. Moreover, functional enrichment of the predicted target genes of DEMs indicated that these miRNAs were involved in biological processes and pathways related to cell adhesion, focal adhesion, endocytosis, and ECM-receptor interaction. Eight DEMs were validated by qRT-PCR. Conclusion The Baiyun District of Guangzhou exhibits a notable proportion of asymptomatic DENV infections as suggested in other research, highlighting the need for enhanced monitoring and screening of asymptomatic persons and the elderly. Differential miRNA expression among healthy, symptomatic and asymptomatic DENV-infected individuals suggests their potential as biomarkers for distinguishing DENV infection and offers new avenues of investigating the mechanisms underlying DENV asymptomatic infections.
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Affiliation(s)
- Xiaokang Li
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Conghui Liao
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jiani Wu
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Boyang Yi
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Renyun Zha
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Qiang Deng
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jianhua Xu
- Guangzhou Baiyun District Center for Disease Control and Prevention, Guangzhou, 510445, China
| | - Cheng Guo
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
| | - Jiahai Lu
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, China
- One Health Center of Excellence for Research & Training, Sun Yat-Sen University, Guangzhou, 510080, China
- National Medical Products Administration Key Laboratory for Quality Monitoring and Evaluation of Vaccines and Biological Products, Guangzhou, 510080, China
- Hainan Key Novel Thinktank “Hainan Medical University ‘One Health’ Research Center”, Haikou, 571199, China
- Research Institute of Sun Yat-Sen University in Shenzhen, Shenzhen, 518057, China
- Key Laboratory of Tropical Diseases Control, Sun Yat-Sen University, Ministry of Education, Guangzhou, 510080, China
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2
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Ma H, Yang Y, Nie T, Yan R, Si Y, Wei J, Li M, Liu H, Ye W, Zhang H, Cheng L, Zhang L, Lv X, Luo L, Xu Z, Zhang X, Lei Y, Zhang F. Disparate macrophage responses are linked to infection outcome of Hantan virus in humans or rodents. Nat Commun 2024; 15:438. [PMID: 38200007 PMCID: PMC10781751 DOI: 10.1038/s41467-024-44687-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 12/29/2023] [Indexed: 01/12/2024] Open
Abstract
Hantaan virus (HTNV) is asymptomatically carried by rodents, yet causes lethal hemorrhagic fever with renal syndrome in humans, the underlying mechanisms of which remain to be elucidated. Here, we show that differential macrophage responses may determine disparate infection outcomes. In mice, late-phase inactivation of inflammatory macrophage prevents cytokine storm syndrome that usually occurs in HTNV-infected patients. This is attained by elaborate crosstalk between Notch and NF-κB pathways. Mechanistically, Notch receptors activated by HTNV enhance NF-κB signaling by recruiting IKKβ and p65, promoting inflammatory macrophage polarization in both species. However, in mice rather than humans, Notch-mediated inflammation is timely restrained by a series of murine-specific long noncoding RNAs transcribed by the Notch pathway in a negative feedback manner. Among them, the lnc-ip65 detaches p65 from the Notch receptor and inhibits p65 phosphorylation, rewiring macrophages from the pro-inflammation to the pro-resolution phenotype. Genetic ablation of lnc-ip65 leads to destructive HTNV infection in mice. Thus, our findings reveal an immune-braking function of murine noncoding RNAs, offering a special therapeutic strategy for HTNV infection.
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Affiliation(s)
- Hongwei Ma
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
- Department of Anaesthesiology & Critical Care Medicine, Xijing Hospital, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Yongheng Yang
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Tiejian Nie
- Department of Experimental Surgery, Tangdu Hospital, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710038, China
| | - Rong Yan
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Yue Si
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Jing Wei
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
- Shaanxi Provincial Centre for Disease Control and Prevention, Xi'an, Shaanxi, 710054, China
| | - Mengyun Li
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - He Liu
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Wei Ye
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Hui Zhang
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Linfeng Cheng
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Liang Zhang
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Xin Lv
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China
| | - Limin Luo
- Department of Infectious Disease, Air Force Hospital of Southern Theatre Command, Guangzhou, Guangdong, 510602, China
| | - Zhikai Xu
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China.
| | - Xijing Zhang
- Department of Anaesthesiology & Critical Care Medicine, Xijing Hospital, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China.
| | - Yingfeng Lei
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China.
| | - Fanglin Zhang
- Department of Microbiology & Pathogen Biology, School of Basic Medical Sciences, Air Force Medical University (the Fourth Military Medical University), Xi'an, Shaanxi, 710032, China.
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3
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Xiao Y, Wang J, Wang J, Wang H, Wu S, Bao W. Analysis of the roles of the Notch1 signalling pathway in modulating deoxynivalenol cytotoxicity. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 246:114183. [PMID: 36270035 DOI: 10.1016/j.ecoenv.2022.114183] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 10/09/2022] [Accepted: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Deoxynivalenol (DON) is a trichothecenes produced by fungi that is widespread and poses a threat to human and animal health. The Notch1 signalling pathway is tightly involved in cell fate determination. The aim of this study was to investigate the role of the Notch1 signalling pathway in DON exposure. Herein, we found that the Notch1 signalling pathway was significantly activated after DON exposure, while Notch1 expression was negatively regulated by DON-induced ROS. Then, the Notch1 signalling pathway was blocked by the γ-secretase inhibitor DAPT in DON exposure. Flow cytometry analysis and antioxidant parameter measurements revealed that DAPT treatment significantly aggravated the oxidative stress induced by DON. The detection of apoptosis showed that DAPT treatment increased the cell apoptotic rate. Further analysis revealed that inhibiting the Notch1 signalling pathway reduced autophagy upon DON exposure. RT-qPCR and Western blot analysis showed that inhibiting the Notch1 signalling pathway aggravated cellular inflammation and activated the MAPK pathway, indicating that the MAPK pathway may be the downstream signalling pathway. Taken together, our research revealed that the Notch1 signalling pathway is essential for protection against DON. Inhibition of Notch1 signalling increases oxidative stress, causes cell apoptosis, reduces autophagy and aggravates cell inflammation after DON exposure. This study investigated the role of the Notch1 signalling pathway in DON exposure and provided a basis for exploring the mechanism of DON.
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Affiliation(s)
- Yeyi Xiao
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Jie Wang
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Jingneng Wang
- Shanghai Xiongtu Biotechnology Co., Ltd., Shanghai 200000, China.
| | - Haifei Wang
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Shenglong Wu
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China.
| | - Wenbin Bao
- Key Laboratory for Animal Genetic, Breeding, Reproduction and Molecular Design of Jiangsu Province, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, China; Shanghai Xiongtu Biotechnology Co., Ltd., Shanghai 200000, China.
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Innate Immune Response to Dengue Virus: Toll-like Receptors and Antiviral Response. Viruses 2022; 14:v14050992. [PMID: 35632732 PMCID: PMC9147118 DOI: 10.3390/v14050992] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/31/2022] [Accepted: 04/04/2022] [Indexed: 02/06/2023] Open
Abstract
Dengue is a mosquito-borne viral disease caused by the dengue virus (DENV1-4). The clinical manifestations range from asymptomatic to life-threatening dengue hemorrhagic fever (DHF) and/or Dengue Shock Syndrome (DSS). Viral and host factors are related to the clinical outcome of dengue, although the disease pathogenesis remains uncertain. The innate antiviral response to DENV is implemented by a variety of immune cells and inflammatory mediators. Blood monocytes, dendritic cells (DCs) and tissue macrophages are the main target cells of DENV infection. These cells recognize pathogen-associated molecular patterns (PAMPs) through pattern recognition receptors (PRRs). Pathogen recognition is a critical step in eliciting the innate immune response. Toll-like receptors (TLRs) are responsible for the innate recognition of pathogens and represent an essential component of the innate and adaptive immune response. Ten different TLRs are described in humans, which are expressed in many different immune cells. The engagement of TLRs with viral PAMPs triggers downstream signaling pathways leading to the production of inflammatory cytokines, interferons (IFNs) and other molecules essential for the prevention of viral replication. Here, we summarize the crucial TLRs’ roles in the antiviral innate immune response to DENV and their association with viral pathogenesis.
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5
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Zhang J, Zhao Y, Sun N, Song M, Chen Y, Li L, Cui H, Yang H, Wang C, Zhang H, Fan H. Lycopene Alleviates Chronic Stress-Induced Spleen Apoptosis and Immunosuppression via Inhibiting the Notch Signaling Pathway in Rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:2889-2897. [PMID: 35212537 DOI: 10.1021/acs.jafc.1c07550] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Chronic stress induction in immunosuppression and splenocyte apoptosis is commonly associated with increased susceptibility to various diseases. Lycopene (LYC) is a member of the carotenoid family with immune restoration and anti-apoptotic function. However, little is known about the mechanisms underlying the protective roles of LYC against spleen injury induced by chronic stress. Herein, male Wistar rats were undergoing chronic restraint stress and/or administered LYC (10 mg/kg) for 21 days. The effective model establishment was validated by open-field tests and levels of corticosterone in serum. Histopathological staining observation displayed that LYC could reduce chronic stress-induced spleen structure damage. Furthermore, LYC treatment significantly reduced the number of apoptotic-positive splenocytes caused by chronic stress via the death receptor apoptotic pathway. We detected the interleukin 4 and interferon γ levels in serum and spleen to determine the ratio of Th1 and Th2 and found that LYC can alleviate the immunosuppression induced by chronic stress. Notably, western blot and real-time polymerase chain reaction indicated that LYC can reduce the expression of the Notch-pathway-related proteins and mRNA in rats exposed to chronic stress. Further study of the potential mechanisms by adding the Notch pathway inhibitor DAPT revealed that LYC alleviates the structure damage, apoptosis, and immunosuppression caused by chronic stress via the suppression of the Notch pathway. Overall, this study presents a strong rationale to target LYC as a treatment strategy to relieve chronic stress-induced spleen injury.
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Affiliation(s)
- Jiuyan Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Yuan Zhao
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Ning Sun
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Manyu Song
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Yongping Chen
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Lin Li
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Hailin Cui
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Haotian Yang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Chuqiao Wang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
| | - Haiyang Zhang
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, Guangdong 510642, People's Republic of China
| | - Honggang Fan
- College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, People's Republic of China
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6
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Moll M, Reichel K, Nurjadi D, Förmer S, Krall LJ, Heeg K, Hildebrand D. Notch Ligand Delta-Like 1 Is Associated With Loss of Vascular Endothelial Barrier Function. Front Physiol 2021; 12:766713. [PMID: 34955884 PMCID: PMC8703021 DOI: 10.3389/fphys.2021.766713] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 11/12/2021] [Indexed: 11/13/2022] Open
Abstract
Vascular leakage associated with vascular endothelial cell (vEC) dysfunction is a hallmark of sepsis. Causative for the decreased integrity of the vascular endothelium (vE) is a complex concurrence of pathogen components, inflammation-associated host factors, and the interaction of vECs and activated circulating immune cells. One signaling pathway that regulates the integrity of the vE is the Notch cascade, which is activated through the binding of a Notch ligand to its respective Notch receptor. Recently, we showed that the soluble form of the Notch ligand Delta-like1 (sDLL1) is highly abundant in the blood of patients with sepsis. However, a direct connection between DLL1-activated Notch signaling and loss of vEC barrier function has not been addressed so far. To study the impact of infection-associated sDLL1, we used human umbilical vein cells (HUVEC) grown in a transwell system and cocultured with blood. Stimulation with sDLL1 induced activation as well as loss of endothelial tight structure and barrier function. Moreover, LPS-stimulated HUVEC activation and increase in endothelial cell permeability could be significantly decreased by blocking DLL1-receptor binding and Notch signaling, confirming the involvement of the cascade in LPS-mediated endothelial dysfunction. In conclusion, our results suggest that during bacterial infection and LPS recognition, DLL1-activated Notch signaling is associated with vascular permeability. This finding might be of clinical relevance in terms of preventing vascular leakage and the severity of sepsis.
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Affiliation(s)
- Maximilian Moll
- Medical Microbiology and Hygiene, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Konrad Reichel
- Medical Microbiology and Hygiene, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Dennis Nurjadi
- Medical Microbiology and Hygiene, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Sandra Förmer
- Medical Microbiology and Hygiene, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Lars Johannes Krall
- Medical Microbiology and Hygiene, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Klaus Heeg
- Medical Microbiology and Hygiene, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
| | - Dagmar Hildebrand
- Medical Microbiology and Hygiene, Center for Infectious Diseases, Heidelberg University Hospital, Heidelberg, Germany
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7
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Hildebrand D, Nurjadi D, Hoan NX, Linh MTH, Sang VV, Bang MH, Pallerla SR, Kremsner PG, Heeg K, Song LH, Velavan TP. Soluble Notch ligand DLL1 is associated with bleeding complication in patients with dengue fever infection. J Infect Dis 2021; 225:476-480. [PMID: 34375432 DOI: 10.1093/infdis/jiab404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/08/2021] [Indexed: 11/14/2022] Open
Abstract
Bleeding associated with endothelial damage is one key feature of severe dengue fever. Here, we investigated whether Notch ligands are associated with bleeding in 115 patients with confirmed dengue infection in Vietnam. Soluble Notch ligands were determined by ELISA. 14.8% (17/115) experienced bleeding manifestations. High soluble DLL1 (sDLL1) plasma levels was associated with bleeding (median 15674 pg/ml vs 7117 pg/ml; p<0.001). ROC analysis demonstrated that sDLL1 had the best test performance (AUC=0.852), with 88% sensitivity and 84% specificity. The combination with ALT/AST slightly increased DLL1 performance. sDLL1 may be useful to guide clinical management of dengue patients in endemic settings.
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Affiliation(s)
- Dagmar Hildebrand
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital, Heidelberg, Germany
| | - Dennis Nurjadi
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital, Heidelberg, Germany
| | - Nghiem Xuan Hoan
- 108 Military Central Hospital, Hanoi, Vietnam.,Vietnamese-German Center for Medical Research, VG-CARE, Hanoi, Vietnam.,Institute of Tropical Medicine, Universitätsklinikum Tübingen, Tübingen, Germany
| | | | - Vu Viet Sang
- 108 Military Central Hospital, Hanoi, Vietnam.,Vietnamese-German Center for Medical Research, VG-CARE, Hanoi, Vietnam
| | | | | | - Peter G Kremsner
- Institute of Tropical Medicine, Universitätsklinikum Tübingen, Tübingen, Germany
| | - Klaus Heeg
- Department of Infectious Diseases, Medical Microbiology and Hygiene, University Hospital, Heidelberg, Germany
| | - Le Huu Song
- 108 Military Central Hospital, Hanoi, Vietnam.,Vietnamese-German Center for Medical Research, VG-CARE, Hanoi, Vietnam
| | - Thirumalaisamy P Velavan
- Vietnamese-German Center for Medical Research, VG-CARE, Hanoi, Vietnam.,Institute of Tropical Medicine, Universitätsklinikum Tübingen, Tübingen, Germany
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8
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Wen J, Chen C, Luo M, Liu X, Guo J, Wei T, Gu X, Gu S, Ning Y, Li Y. Notch Signaling Ligand Jagged1 Enhances Macrophage-Mediated Response to Helicobacter pylori. Front Microbiol 2021; 12:692832. [PMID: 34305857 PMCID: PMC8297740 DOI: 10.3389/fmicb.2021.692832] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Accepted: 06/04/2021] [Indexed: 12/11/2022] Open
Abstract
Helicobacter pylori (H. pylori) is one of the gram-negative bacteria that mainly colonize the stomach mucosa and cause many gastrointestinal diseases, such as gastritis, peptic ulcer, and gastric cancer. Macrophages play a key role in eradicating H. pylori. Recent data have shown that Notch signaling could modulate the activation and bactericidal activities of macrophages. However, the role of Notch signaling in macrophages against H. pylori remains unclear. In the present study, in the co-culture model of macrophages with H. pylori, the inhibition of Notch signaling using γ-secretase decreased the expression of inducible nitric oxide synthase (iNOS) and its product, nitric oxide (NO), and downregulated the secretion of pro-inflammatory cytokine and attenuated phagocytosis and bactericidal activities of macrophages to H. pylori. Furthermore, we identified that Jagged1, one of Notch signaling ligands, was both upregulated in mRNA and protein level in activated macrophages induced by H. pylori. Clinical specimens showed that the number of Jagged1+ macrophages in the stomach mucosa from H. pylori-infected patients was significantly higher than that in healthy control. The overexpression of Jagged1 promoted bactericidal activities of macrophages against H. pylori and siRNA-Jagged1 presented the opposite effect. Besides, the addition of exogenous rJagged1 facilitated the pro-inflammatory mediators of macrophages against H. pylori, but the treatment of anti-Jagged1 neutralizing antibody attenuated it. Taken together, these results suggest that Jagged1 is a promoting molecule for macrophages against H. pylori, which will provide insight for exploring Jagged1 as a novel therapeutic target for the control of H. pylori infection.
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Affiliation(s)
- Junjie Wen
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Chuxi Chen
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Meiqun Luo
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Xiaocong Liu
- The First Clinical Medical School, Southern Medical University, Guangzhou, China
| | - Jiading Guo
- The First Clinical Medical School, Southern Medical University, Guangzhou, China
| | - Tingting Wei
- The First Clinical Medical School, Southern Medical University, Guangzhou, China
| | - Xinyi Gu
- The First Clinical Medical School, Southern Medical University, Guangzhou, China
| | - Sinan Gu
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Yunshan Ning
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
| | - Yan Li
- School of Laboratory Medicine and Biotechnology, Southern Medical University, Guangzhou, China
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9
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Wang Y, Huo Z, Lin Q, Lin Y, Chen C, Huang Y, Huang C, Zhang J, He J, Liu C, Zhang P. Positive Feedback Loop of Long Noncoding RNA OASL-IT1 and Innate Immune Response Restricts the Replication of Zika Virus in Epithelial A549 Cells. J Innate Immun 2021; 13:179-193. [PMID: 33626545 DOI: 10.1159/000513606] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 11/04/2020] [Indexed: 12/19/2022] Open
Abstract
Expression of host noncoding RNAs and coding mRNAs is significantly altered by viral infection. In the current study, we screened the transcriptional profile of human lung epithelial A549 cells infected with Zika virus (ZIKV) by microarray assay. Seventy-nine long noncoding RNAs (lncRNAs) and 140 mRNAs were differentially expressed (DE). The bioinformatics analysis revealed that the mRNAs adjacent to the DE lncRNAs were closely related to the host responses to viral infection. We selected 7 lncRNAs from the top 50 hits for validation. The quantitative real-time PCR data confirmed that expression of selected lncRNAs was induced by ZIKV infection. Moreover, the expression of 7 lncRNAs was induced by infection of dengue virus, Japanese encephalitis virus, or vesicular stomatitis virus, or by treatment of poly(I:C) and IFN-β. Furthermore, loss of innate immune adaptor IPS-1 or receptor IFNAR1 resulted in lower induction levels of several lncRNAs by ZIKV. Overexpression of 3 lncRNAs (RPL27-OT1, OASL-IT1, and REC8-OT3) reduced the virus yields of ZIKV. Knockout of OASL-IT1 significantly enhanced ZIKV replication. In OASL-IT1 knockout cells, the levels of interferons (IFNs) and the activation of 3 innate immune signaling pathways triggered by ZIKV were dramatically reduced. Collectively, our work found a positive feedback loop in the IFN system, in which IFNs and OASL-IT1 regulate each other, thereby promoting establishment of antiviral defense.
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Affiliation(s)
- Yi Wang
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Zhiting Huo
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Quanshi Lin
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Yuxia Lin
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Cancan Chen
- Department of Pathology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yanxia Huang
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Changbai Huang
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Junsong Zhang
- Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Junfang He
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Chao Liu
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Department of Microbiology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China
| | - Ping Zhang
- Key Laboratory of Tropical Disease Control, Ministry of Education, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China, .,Department of Immunology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China,
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10
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Dengue virus infection impedes megakaryopoiesis in MEG-01 cells where the virus envelope protein interacts with the transcription factor TAL-1. Sci Rep 2020; 10:19587. [PMID: 33177556 PMCID: PMC7658202 DOI: 10.1038/s41598-020-76350-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Accepted: 10/08/2020] [Indexed: 12/30/2022] Open
Abstract
Dengue virus (DENV) infection causes dengue fever in humans, which can lead to thrombocytopenia showing a marked reduction in platelet counts, and dengue hemorrhagic fever. The virus may cause thrombocytopenia either by destroying the platelets or by interfering with their generation via the process of megakaryopoiesis. MEG-01 is the human megakaryoblastic leukemia cell line that can be differentiated in vitro by phorbol-12-myristate-13-acetate (PMA) treatment to produce platelet-like-particles (PLPs). We have studied DENV infection of MEG-01 cells to understand its effect on megakaryopoiesis and the generation of PLPs. We observed that DENV could infect only naive MEG-01 cells, and differentiated cells were refractory to virus infection/replication. However, DENV-infected MEG-01 cells, when induced for differentiation with PMA, supported an enhanced viral replication. Following the virus infection, the MEG-01 cells showed a marked reduction in the surface expression of platelet markers (CD41, CD42a, and CD61), a decreased polyploidy, and significantly reduced PLP counts. DENV infection caused an enhanced Notch signaling in MEG-01 cells where the virus envelope protein was shown to interact with TAL-1, a host protein important for megakaryopoiesis. These observations provide new insight into the role of DENV in modulating the megakaryopoiesis and platelet production process.
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11
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Nalin AP, Kowalski JJ, Sprague AC, Schumacher BK, Gerhardt AG, Youssef Y, Vedantam KV, Zhang X, Siebel CW, Mace EM, Caligiuri MA, Mundy-Bosse BL, Freud AG. Notch Regulates Innate Lymphoid Cell Plasticity during Human NK Cell Development. THE JOURNAL OF IMMUNOLOGY 2020; 205:2679-2693. [PMID: 33020148 DOI: 10.4049/jimmunol.2000434] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 09/11/2020] [Indexed: 12/21/2022]
Abstract
Human NK cells develop in tonsils through discrete NK cell developmental intermediates (NKDIs), yet the mechanistic regulation of this process is unclear. We demonstrate that Notch activation in human tonsil-derived stage 3 (CD34-CD117+CD94-NKp80-) and 4A (CD34-CD117+/-CD94+NKp80-) NKDIs promoted non-NK innate lymphoid cell differentiation at the expense of NK cell differentiation. In contrast, stage 4B (CD34-CD117+/-CD94+NKp80+) NKDIs were NK cell lineage committed despite Notch activation. Interestingly, whereas NK cell functional maturation from stage 3 and 4A NKDIs was independent of Notch activation, the latter was required for high NKp80 expression and a stage 4B-like phenotype by the NKDI-derived NK cells. The Notch-dependent effects required simultaneous engagement with OP9 stromal cells and were also stage-specific, with NOTCH1 and NOTCH2 receptors regulating stage 3 NKDIs and NOTCH1 primarily regulating stage 4A NKDIs. These data establish stage-specific and stromal-dependent roles for Notch in regulating human NK cell developmental plasticity and maturation.
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Affiliation(s)
- Ansel P Nalin
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210.,Medical Scientist Training Program, Biomedical Sciences Graduate Program, The Ohio State University, Columbus, OH 43210
| | - Jesse J Kowalski
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210
| | | | | | - Adam G Gerhardt
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210
| | - Youssef Youssef
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210.,Division of Hematology, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210
| | - Kiran V Vedantam
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210
| | - Xiaoli Zhang
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210.,Department of Biomedical Informatics, The Ohio State University, Columbus, OH 43210
| | - Christian W Siebel
- Department of Molecular Biology, Genentech Inc., South San Francisco, CA 94080
| | - Emily M Mace
- Department of Pediatrics, Columbia University, New York, NY 10032
| | - Michael A Caligiuri
- Department of Hematology and Hematopoietic Cell Transplantation, City of Hope National Medical Center, Duarte, CA 91010; and
| | - Bethany L Mundy-Bosse
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210.,Division of Hematology, Department of Internal Medicine, The Ohio State University, Columbus, OH 43210
| | - Aharon G Freud
- Comprehensive Cancer Center, The Ohio State University, Columbus, OH 43210; .,Department of Pathology, The Ohio State University, Columbus, OH 43210
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12
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RNA Helicase A Is an Important Host Factor Involved in Dengue Virus Replication. J Virol 2019; 93:JVI.01306-18. [PMID: 30463971 DOI: 10.1128/jvi.01306-18] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 11/12/2018] [Indexed: 12/23/2022] Open
Abstract
Dengue virus (DENV) utilizes host factors throughout its life cycle. In this study, we identified RNA helicase A (RHA), a member of the DEAD/H helicase family, as an important host factor of DENV. In response to DENV2 infection, nuclear RHA protein was partially redistributed into the cytoplasm. The short interfering RNA-mediated knockdown of RHA significantly reduced the amounts of infectious viral particles in various cells. The RHA knockdown reduced the multistep viral growth of DENV2 and Japanese encephalitis virus but not Zika virus. Further study showed that the absence of RHA resulted in a reduction of both viral RNA and protein levels, and the data obtained from the reporter replicon assay indicated that RHA does not directly promote viral protein synthesis. RHA bound to the DENV RNA and associated with three nonstructural proteins, including NS1, NS2B3, and NS4B. Further study showed that different domains of RHA mediated its interaction with these viral proteins. The expression of RHA or RHA-K417R mutant protein lacking ATPase/helicase activity in RHA-knockdown cells successfully restored DENV2 replication levels, suggesting that the helicase activity of RHA is dispensable for its proviral effect. Overall, our work reveals that RHA is an important factor of DENV and might serve as a target for antiviral agents.IMPORTANCE Dengue, caused by dengue virus, is a rapidly spreading disease, and currently there are no treatments available. Host factors involved in the viral replication of dengue virus are potential antiviral therapeutic targets. Although RHA has been shown to promote the multiplication of several viruses, such as HIV and adenovirus, its role in the flavivirus family, including dengue virus, Japanese encephalitis virus, and emerging Zika virus, remains elusive. The current study revealed that RHA relocalized into the cytoplasm upon DENV infection and associated with viral RNA and nonstructural proteins, implying that RHA was actively engaged in the viral life cycle. We further provide evidence that RHA promoted the viral yields of DENV2 independent of its helicase activity. These findings demonstrated that RHA is a new host factor required for DENV replication and might serve as a target for antiviral drugs.
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13
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The multifaceted role of Notch signal in regulating T cell fate. Immunol Lett 2019; 206:59-64. [PMID: 30629981 DOI: 10.1016/j.imlet.2019.01.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 12/28/2018] [Accepted: 01/05/2019] [Indexed: 11/22/2022]
Abstract
Notch signaling pathway facilitates important cellular functions of the host. Notch signal is essential for the development of T cells, and the role of Notch in fine tuning of αβ versus γδ T cell lineage commitment is fundamentally different in mice and human. The Notch family of cell surface receptor likewise plays a critical role in regulating T cell activation, and influences T cell response both intrinsically and through the local environment. In this review, we take an overview of Notch signaling pathway and also emphasize the role of Notch signal in T cell lineage differentiation and activating effector function of peripheral T cells.
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14
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Kunanopparat A, Issara-Amphorn J, Leelahavanichkul A, Sanpavat A, Patumraj S, Tangkijvanich P, Palaga T, Hirankarn N. Delta-like ligand 4 in hepatocellular carcinoma intrinsically promotes tumour growth and suppresses hepatitis B virus replication. World J Gastroenterol 2018; 24:3861-3870. [PMID: 30228780 PMCID: PMC6141339 DOI: 10.3748/wjg.v24.i34.3861] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/05/2018] [Accepted: 07/16/2018] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate the role of Delta-like ligand 4 (DLL4) on tumour growth in hepatitis B virus (HBV)-associated hepatocellular carcinoma (HCC) in vivo.
METHODS We suppressed DLL4 expression in an HBV expressing HCC cell line, HepG2.2.15 and analysed the growth ability of cells as subcutaneous tumours in nude mice. The expression of tumour angiogenesis regulators, VEGF-A and VEGF-R2 in tumour xenografts were examined by western blotting. The tumour proliferation and neovasculature were examined by immunohistochemistry. The viral replication and viral protein expression were measured by quantitative PCR and western blotting, respectively.
RESULTS Eighteen days after implantation, tumour volume in mice implanted with shDLL4 HepG2.2.15 was significantly smaller than in mice implanted with control HepG2.2.15 (P < 0.0001). The levels of angiogenesis regulators, VEGF-A and VEGF-R2 were significantly decreased in implanted tumours with suppressed DLL4 compared with the control group (P < 0.001 and P < 0.05, respectively). Furthermore, the suppression of DLL4 expression in tumour cells reduced cell proliferation and the formation of new blood vessels in tumours. Unexpectedly, increased viral replication was observed after suppression of DLL4 in the tumours.
CONCLUSION This study demonstrates that DLL4 is important in regulating the tumour growth of HBV-associated HCC as well as the neovascularization and suppression of HBV replication.
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Affiliation(s)
- Areerat Kunanopparat
- Center of Excellence in Immunology and Immune Mediated Diseases, Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Jiraphorn Issara-Amphorn
- Center of Excellence in Immunology and Immune Mediated Diseases, Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Asada Leelahavanichkul
- Center of Excellence in Immunology and Immune Mediated Diseases, Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Anapat Sanpavat
- Department of Pathology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Suthiluk Patumraj
- Center of Excellence for Microcirculation, Department of Physiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Pisit Tangkijvanich
- Research Unit of Hepatitis and Liver Cancer, Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
| | - Tanapat Palaga
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Nattiya Hirankarn
- Center of Excellence in Immunology and Immune Mediated Diseases, Department of Microbiology, Faculty of Medicine, Chulalongkorn University, Bangkok 10330, Thailand
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15
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Serrato-Salas J, Hernández-Martínez S, Martínez-Barnetche J, Condé R, Alvarado-Delgado A, Zumaya-Estrada F, Lanz-Mendoza H. De Novo DNA Synthesis in Aedes aegypti Midgut Cells as a Complementary Strategy to Limit Dengue Viral Replication. Front Microbiol 2018; 9:801. [PMID: 29755433 PMCID: PMC5932203 DOI: 10.3389/fmicb.2018.00801] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 04/10/2018] [Indexed: 12/23/2022] Open
Abstract
Aedes aegypti is the main vector of Dengue Virus, carrying the virus during the whole mosquito life post-infection. Few mosquito fitness costs have been associated to the virus infection, thereby allowing for a swift dissemination. In order to diminish the mosquito population, public health agency use persistent chemicals with environmental impact for disease control. Most countries barely use biological controls, if at all. With the purpose of developing novel Dengue control strategies, a detailed understanding of the unexplored virus-vector interactions is urgently needed. Damage induced (through tissue injury or bacterial invasion) DNA duplication (endoreplication) has been described in insects during epithelial cells renewal. Here, we delved into the mosquito midgut tissue ability to synthesize DNA de novo; postulating that Dengue virus infection could trigger a protective endoreplication mechanism in some mosquito cells. We hypothesized that the Aedes aegypti orthologue of the Drosophila melanogaster hindsight gene (not previously annotated in Aedes aegypti transcriptome/genome) is part of the Delta-Notch pathway. The activation of this transcriptional cascade leads to genomic DNA endoreplication. The amplification of the genomic copies of specific genes ultimately limits the viral spreading during infection. Conversely, inhibiting DNA synthesis capacity, hence endoreplication, leads to a higher viral replication.
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Affiliation(s)
| | | | | | | | | | | | - Humberto Lanz-Mendoza
- Centro de Investigaciones Sobre Enfermedades Infecciosas, Instituto Nacional de Salud Pública, Cuernavaca, Mexico
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16
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Tindemans I, Peeters MJW, Hendriks RW. Notch Signaling in T Helper Cell Subsets: Instructor or Unbiased Amplifier? Front Immunol 2017; 8:419. [PMID: 28458667 PMCID: PMC5394483 DOI: 10.3389/fimmu.2017.00419] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 03/24/2017] [Indexed: 11/16/2022] Open
Abstract
For protection against pathogens, it is essential that naïve CD4+ T cells differentiate into specific effector T helper (Th) cell subsets following activation by antigen presented by dendritic cells (DCs). Next to T cell receptor and cytokine signals, membrane-bound Notch ligands have an important role in orchestrating Th cell differentiation. Several studies provided evidence that DC activation is accompanied by surface expression of Notch ligands. Intriguingly, DCs that express the delta-like or Jagged Notch ligands gain the capacity to instruct Th1 or Th2 cell polarization, respectively. However, in contrast to this model it has also been hypothesized that Notch signaling acts as a general amplifier of Th cell responses rather than an instructive director of specific T cell fates. In this alternative model, Notch enhances proliferation, cytokine production, and anti-apoptotic signals or promotes co-stimulatory signals in T cells. An instructive role for Notch ligand expressing DCs in the induction of Th cell differentiation is further challenged by evidence for the involvement of Notch signaling in differentiation of Th9, Th17, regulatory T cells, and follicular Th cells. In this review, we will discuss the two opposing models, referred to as the “instructive” and the “unbiased amplifier” model. We highlight both the function of different Notch receptors on CD4+ T cells and the impact of Notch ligands on antigen-presenting cells.
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Affiliation(s)
- Irma Tindemans
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, Netherlands
| | | | - Rudi W Hendriks
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, Netherlands
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17
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Tindemans I, Lukkes M, de Bruijn MJW, Li BWS, van Nimwegen M, Amsen D, KleinJan A, Hendriks RW. Notch signaling in T cells is essential for allergic airway inflammation, but expression of the Notch ligands Jagged 1 and Jagged 2 on dendritic cells is dispensable. J Allergy Clin Immunol 2017; 140:1079-1089. [PMID: 28111308 DOI: 10.1016/j.jaci.2016.11.046] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 11/03/2016] [Accepted: 11/11/2016] [Indexed: 01/09/2023]
Abstract
BACKGROUND Allergic asthma is characterized by a TH2 response induced by dendritic cells (DCs) that present inhaled allergen. Although the mechanisms by which they instruct TH2 differentiation are still poorly understood, expression of the Notch ligand Jagged on DCs has been implicated in this process. OBJECTIVE We sought to establish whether Notch signaling induced by DCs is critical for house dust mite (HDM)-driven allergic airway inflammation (AAI) in vivo. METHODS The induction of Notch ligand expression on DC subsets by HDM was quantified by using quantitative real-time PCR. We used an HDM-driven asthma mouse model to compare the capacity of Jagged 1 and Jagged 2 single- and double-deficient DCs to induce AAI. In addition, we studied AAI in mice with a T cell-specific deletion of recombination signal-binding protein for immunoglobulin Jκ region (RBPJκ), a downstream effector of Notch signaling. RESULTS HDM exposure promoted expression of Jagged 1, but not Jagged 2, on DCs. In agreement with published findings, in vitro-differentiated and HDM-pulsed Jagged 1 and Jagged 2 double-deficient DCs lacked the capacity to induce AAI. However, after in vivo intranasal sensitization and challenge with HDM, DC-specific Jagged 1 or Jagged 2 single- or double-deficient mice had eosinophilic airway inflammation and a TH2 cell activation phenotype that was not different from that in control littermates. In contrast, RBPJκ-deficient mice did not experience AAI and airway hyperreactivity. CONCLUSION Our results show that the Notch signaling pathway in T cells is crucial for the induction of TH2-mediated AAI in an HDM-driven asthma model but that expression of Jagged 1 or Jagged 2 on DCs is not required.
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Affiliation(s)
- Irma Tindemans
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Melanie Lukkes
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands
| | | | - Bobby W S Li
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Menno van Nimwegen
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands
| | | | - Alex KleinJan
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Rudi W Hendriks
- Department of Pulmonary Medicine, Erasmus MC, Rotterdam, The Netherlands.
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18
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Schaller MA, Allen RM, Kimura S, Day CL, Kunkel SL. Systemic Expression of Notch Ligand Delta-Like 4 during Mycobacterial Infection Alters the T Cell Immune Response. Front Immunol 2016; 7:527. [PMID: 27933064 PMCID: PMC5121470 DOI: 10.3389/fimmu.2016.00527] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 11/10/2016] [Indexed: 12/18/2022] Open
Abstract
The Notch ligand delta-like 4 (DLL4) is known to fine-tune the CD4+ T cell cytokine response. DLL4 is expressed on the surface of antigen-presenting cells (APCs) in a MyD88-dependent manner. We found that DLL4 expression was upregulated on bone marrow progenitor cells and APCs in mice infected with BCG Mycobacterium. Transfer of DLL4+ progenitor cells from infected hosts resulted in an increase DLL4+ myeloid cells in the spleen, indicating that expression of the dll4 gene is propagated throughout hematopoiesis. We also found an increase in DLL4+ monocytes from individuals who were infected with Mycobacterium tuberculosis. In latent individuals, DLL4 expression correlated with increased cytokine production from T cells in response to PPD stimulation. Finally, antibody blockade of DLL4 reduced T cell cytokine production from naïve T cells stimulated with antigen. These results demonstrate that the Notch ligand DLL4 can influence T cell cytokine production in both humans and mice, and further reveal that expression of DLL4 is upregulated on early hematopoietic progenitors in response to chronic mycobacterial infection. These data suggest that widespread DLL4 expression may occur as a result of mycobacterial infection, and that this expression may alter CD4+ T cell responses to both previously encountered and novel antigens.
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Affiliation(s)
- Matthew A Schaller
- Department of Pathology, University of Michigan Medical School , Ann Arbor, MI , USA
| | - Ronald M Allen
- Department of Pathology, University of Michigan Medical School , Ann Arbor, MI , USA
| | - Soichiro Kimura
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine , Tokyo , Japan
| | - Cheryl L Day
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA, USA; Emory Vaccine Center, Emory University School of Medicine, Atlanta, GA, USA; South African Tuberculosis Vaccine Initiative (SATVI), Institute of Infectious Diseases and Molecular Medicine, School of Child and Adolescent Health, University of Cape Town, Observatory, South Africa
| | - Steven L Kunkel
- Department of Pathology, University of Michigan Medical School , Ann Arbor, MI , USA
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19
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HES1 in immunity and cancer. Cytokine Growth Factor Rev 2016; 30:113-7. [PMID: 27066918 DOI: 10.1016/j.cytogfr.2016.03.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 03/18/2016] [Accepted: 03/18/2016] [Indexed: 01/06/2023]
Abstract
Hairy and enhancer of split homolog-1 (HES1) is a part of an extensive family of basic helix-loop-helix (bHLH) proteins and plays a crucial role in the control and regulation of cell cycle, proliferation, cell differentiation, survival and apoptosis in neuronal, endocrine, T-lymphocyte progenitors as well as various cancers. HES1 is a transcription factor which is regulated by the NOTCH, Hedgehog and Wnt signalling pathways. Aberrant expression of these pathways is a common feature of cancerous cells. There appears to be a fine and complicated crosstalk at the molecular level between the various signalling pathways and HES1, which contributes to its effects on the immune response and cancers such as leukaemia. Several mechanisms have been proposed, including an enhanced invasiveness and metastasis by inducing epithelial mesenchymal transition (EMT), in addition to its strict requirement for tumour cell survival. In this review, we summarize the current biology and molecular mechanisms as well as its use as a clinical target in cancer therapeutics.
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20
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Dynamic changes in global microRNAome and transcriptome reveal complex miRNA-mRNA regulated host response to Japanese Encephalitis Virus in microglial cells. Sci Rep 2016; 6:20263. [PMID: 26838068 PMCID: PMC4738309 DOI: 10.1038/srep20263] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 12/31/2015] [Indexed: 12/11/2022] Open
Abstract
Microglia cells in the brain play essential role during Japanese Encephalitis Virus (JEV) infection and may lead to change in microRNA (miRNA) and mRNA profile. These changes may together control disease outcome. Using Affymetrix microarray platform, we profiled cellular miRNA and mRNA expression at multiple time points during viral infection in human microglial (CHME3) cells. In silico analysis of microarray data revealed a phased pattern of miRNAs expression, associated with JEV replication and provided unique signatures of infection. Target prediction and pathway enrichment analysis identified anti correlation between differentially expressed miRNA and the gene expression at multiple time point which ultimately affected diverse signaling pathways including Notch signaling pathways in microglia. Activation of Notch pathway during JEV infection was demonstrated in vitro and in vivo. The expression of a subset of miRNAs that target multiple genes in Notch signaling pathways were suppressed and their overexpression could affect JEV induced immune response. Further analysis provided evidence for the possible presence of cellular competing endogenous RNA (ceRNA) associated with innate immune response. Collectively, our data provide a uniquely comprehensive view of the changes in the host miRNAs induced by JEV during cellular infection and identify Notch pathway in modulating microglia mediated inflammation.
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21
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MicroRNA transcriptome profiling of mice brains infected with Japanese encephalitis virus by RNA sequencing. INFECTION GENETICS AND EVOLUTION 2016; 39:249-257. [PMID: 26845346 DOI: 10.1016/j.meegid.2016.01.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Revised: 01/11/2016] [Accepted: 01/30/2016] [Indexed: 12/11/2022]
Abstract
Japanese encephalitis (JE) is a mosquito borne viral disease, caused by Japanese encephalitis virus (JEV) infection producing severe neuroinflammation in the central nervous system (CNS) with the associated disruption of the blood brain barrier. MicroRNAs (miRNAs) are a family of 21-24 nt small non-coding RNAs that play important post-transcriptional regulatory roles in gene expression and have critical roles in virus pathogenesis. We examined the potential roles of miRNAs in JEV-infected suckling mice brains and found that JEV infection changed miRNA expression profiles when the suckling mice began showing nervous symptoms. A total of 1062 known and 71 novel miRNAs were detected in JEV-infected group, accompanied with 1088 known and 75 novel miRNAs in mock controls. Among these miRNAs, one novel and 25 known miRNAs were significantly differentially expressed, including 18 up-regulated and 8 down-regulated miRNAs which were further confirmed by real-time PCR. Gene ontology (GO) and signaling pathway analysis of the predicted target mRNAs of the modulated miRNAs showed that they are correlated with the regulation of apoptosis, neuron differentiation, antiviral immunity and infiltration of mouse brain, and the validated targets of 12 differentially expressed miRNAs were enriched for the regulation of cell programmed death, proliferation, transcription, muscle organ development, erythrocyte differentiation, gene expression, plasma membrane and protein domain specific binding. KEGG analysis further reveals that the validated target genes were involved in the Pathways in cancer, Neurotrophin signaling pathway, Toll like receptor signaling pathway, Endometrial cancer and Jak-STAT signaling pathway. We constructed the interaction networks of miRNAs and their target genes according to GO terms and KEGG pathways and the expression levels of several target genes were examined. Our data provides a valuable basis for further studies on the regulatory roles of miRNAs in JE pathogenesis.
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22
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Wang Q, Xu R. DenguePredict: An Integrated Drug Repositioning Approach towards Drug Discovery for Dengue. AMIA ... ANNUAL SYMPOSIUM PROCEEDINGS. AMIA SYMPOSIUM 2015; 2015:1279-88. [PMID: 26958268 PMCID: PMC4765554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Dengue is a viral disease of expanding global incidence without cures. Here we present a drug repositioning system (DenguePredict) leveraging upon a unique drug treatment database and vast amounts of disease- and drug-related data. We first constructed a large-scale genetic disease network with enriched dengue genetics data curated from biomedical literature. We applied a network-based ranking algorithm to find dengue-related diseases from the disease network. We then developed a novel algorithm to prioritize FDA-approved drugs from dengue-related diseases to treat dengue. When tested in a de-novo validation setting, DenguePredict found the only two drugs tested in clinical trials for treating dengue and ranked them highly: chloroquine ranked at top 0.96% and ivermectin at top 22.75%. We showed that drugs targeting immune systems and arachidonic acid metabolism-related apoptotic pathways might represent innovative drugs to treat dengue. In summary, DenguePredict, by combining comprehensive disease- and drug-related data and novel algorithms, may greatly facilitate drug discovery for dengue.
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Affiliation(s)
| | - Rong Xu
- Department of Epidemiology and Biostatistics, Institute of Computational Biology, School of Medicine, Case Western Reserve University, Cleveland, OH
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23
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Xia J, Chen X, Xu F, Wang Y, Shi Y, Li Y, He J, Zhang P. Dengue virus infection induces formation of G3BP1 granules in human lung epithelial cells. Arch Virol 2015; 160:2991-9. [PMID: 26350772 DOI: 10.1007/s00705-015-2578-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Accepted: 08/21/2015] [Indexed: 01/05/2023]
Abstract
Cells reprogram ongoing translation in response to viral infection, resulting in formation of stress granules (SGs), while viruses have evolved a variety of strategies to antagonize the host SG response. Previous literature reported that in BHK-1 cells, infection with dengue virus (DENV) interfered with the SG formation. In the current study, we further investigated SG formation in human epithelial A549 cells by detecting subcellular localization of two SG hallmarks, TIA-1 and G3BP1. In response to DENV type 2 (DENV2) and type 3 (DENV3) infection, G3BP1, but not TIA-1, was recruited into cytoplasmic granules in some cells, and viral protein synthesis was significantly impaired in the G3BP1-granule-containing cells. Knockdown of G3BP1 significantly rescued the dsRNA-mediated suppression of DENV2 replication. Furthermore, our data showed that the phosphorylation of protein kinase regulated by dsRNA (PKR) and eIF2α, as well as accumulation of dsRNA, mainly occurred at the late stage of viral infection. This work revealed that in DENV-infected A549 cells, G3BP1 granules were assembled independently of TIA-1 and had a negative impact on viral replication. This extends our understanding of the antagonistic relationship between the SG response and dengue virus infection.
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Affiliation(s)
- Jun Xia
- Department of Immunology, Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China.,Key Laboratory of Tropical Diseases Control, Ministry of Education, Guangzhou, 510080, China
| | - Xiaoyan Chen
- Department of Immunology, Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China.,Key Laboratory of Tropical Diseases Control, Ministry of Education, Guangzhou, 510080, China
| | - Feng Xu
- Department of Immunology, Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China.,Key Laboratory of Tropical Diseases Control, Ministry of Education, Guangzhou, 510080, China
| | - Yi Wang
- Department of Immunology, Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China.,Key Laboratory of Tropical Diseases Control, Ministry of Education, Guangzhou, 510080, China
| | - Yongxia Shi
- Guangdong Inspection and Quarantine Technology Center, Guangzhou, 510080, China
| | - Yuye Li
- Department of Immunology, Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China.,Key Laboratory of Tropical Diseases Control, Ministry of Education, Guangzhou, 510080, China
| | - Junfang He
- Department of Immunology, Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China. .,Key Laboratory of Tropical Diseases Control, Ministry of Education, Guangzhou, 510080, China.
| | - Ping Zhang
- Department of Immunology, Institute of Human Virology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, China. .,Key Laboratory of Tropical Diseases Control, Ministry of Education, Guangzhou, 510080, China.
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