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Javeed SA, Teh BH, Ong TS, Lan NTP, Muthaiyah S, Latief R. The Connection between Absorptive Capacity and Green Innovation: The Function of Board Capital and Environmental Regulation. Int J Environ Res Public Health 2023; 20:3119. [PMID: 36833812 PMCID: PMC9966624 DOI: 10.3390/ijerph20043119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
The stress of environmental regulations, sustainable development objectives, and global warming is becoming more prominent now. Most studies conclude that the industrial sector is largely at fault and under tremendous pressure to address these climate change issues. This study highlights the significance of green innovation to Chinese firms in mitigating these conservational challenges, and the study probes the association between green innovation and absorptive capacity. Additionally, board capital (the social and human capital of directors) and environmental regulation-both drivers of green innovation-are explored as moderators between green innovation and absorptive capacity. With appropriate econometric methods and theoretical support from the natural resource-based review, the resource dependency theory, and the Porter hypothesis, the results indicate the positive relationship between green innovation and absorptive capacity. They also reveal board capital and environmental regulation as positive moderators, emphasizing their significance to green innovation. This study offers several suggestions and directives for stakeholders, such as businesses, policymakers, and governments, to foster green innovation for greater profitability, minimizing negative industrial consequences.
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Affiliation(s)
| | - Boon Heng Teh
- Faculty of Management, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia
| | - Tze San Ong
- School of Business and Economics, Universiti Putra, Serdang 43400, Malaysia
- Department of Business Administration, Daffodil International University, Dhaka 1341, Bangladesh
| | - Nguyen Thi Phuong Lan
- Faculty of Management, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia
| | - Saravanan Muthaiyah
- Faculty of Management, Multimedia University, Persiaran Multimedia, Cyberjaya 63100, Malaysia
| | - Rashid Latief
- School of Finance, Xuzhou University of Technology, Xuzhou 221018, China
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Muthaiyah S, Anbananthen KSM, Phuong Lan NT. Orchestration of autonomous trusted third-party banking. F1000Res 2021; 10:899. [PMID: 34745564 PMCID: PMC8543169 DOI: 10.12688/f1000research.72987.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/26/2021] [Indexed: 11/22/2022] Open
Abstract
Background Digital transformation is changing the structure and landscape of future banking needs with much emphasis on value creation. Autonomous banking solutions must incorporate on-the-fly processing for risky transactions to create this value. In an autonomous environment, access control with role and trust delegation has been said to be highly relevant. The aim of this research is to provide an end to end working solution that will enable autonomous transaction and task processing for banking. Method We illustrate the use case for task delegation with the aid of risk graphs, risk bands and finite state machines. This paper also highlights a step by step task delegation process using a risk ordering relation methodology that can be embedded into smart contracts. Results Task delegation with risk ordering relation is illustrated with six process owners that share immutable ledgers. Task delegation properties using Multi Agent Systems (MAS) is used to eliminate barriers for autonomous transaction processing. Secondly, the application of risk graph and risk ordering relation with reference to delegation of tasks is a novel approach that is nonexistent in RBAC. Conclusion The novelty of this study is the logic for task delegation and task policies for autonomous execution on autonomous banking platforms akin to the idea of federated ID (Liberty Alliance).
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Affiliation(s)
- Saravanan Muthaiyah
- Faculty of Management, Multimedia University, Cyberjaya, Selangor, 40400, Malaysia
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Lan NTP, Tam NT, Bach NX, Thien LC. Psychotropic Drugs Prescription and Use among Children with Mental Disorders at a Tertiary Hospital in Vietnam. Hosp Pharm 2021; 57:336-344. [DOI: 10.1177/00185787211032357] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background: Awareness of psychotropic medication and its adverse drug reactions (ADRs) can promote safe and rational use of medications, particularly in children and adolescents with mental problems. This study examined the prescription of psychotropic drugs and actual drug-drug interaction (DDI) and ADR for children with mental disorders under 18 years of age in a tertiary hospital in Vietnam. Methods: A cross-sectional descriptive study was performed on 257 psychiatric inpatients under 18 years of age at the National Mental Health Institute—Bach Mai Hospital in 2017. Information about the course of treatment included prescribed medications, drug interactions, side effects, drug combination, and modifications to the regimen was collected. Results: 14.8% and 59.5% of patients received a single-drug regimen and a 2-drug combination regimen upon admission, respectively. The most used regimen was antipsychotics + tranquilizers, accounting for 38.1%. Haloperidol was the most commonly prescribed drug (40.5%). Most patients were given the recommended dosage of the drug (>90%). There were 20.6% of patients having drug interactions with the largest proportion of the combination of diazepam and olanzapine (62.3%). ADRs of psychotropic drugs were detected in 46.3% of patients, with the highest rate of ADRs from antipsychotic drugs. Antipsychotics had the highest rate of replacement (91.3%), mostly replaced from a first-generation antipsychotic (FGA) to a second-generation antipsychotic (SGA). Conclusion: The appointment of psychotropic drugs to patients under 18 years of age has to comply with the recommendations, and carefully balance the benefits and risks of ADRs as well as the risk of DDI in case of the drug combination.
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Nhi DM, Huy NT, Ohyama K, Kimura D, Lan NTP, Uchida L, Thuong NV, Nhon CTM, Phuc LH, Mai NT, Mizukami S, Bao LQ, Doan NN, Binh NVT, Quang LC, Karbwang J, Yui K, Morita K, Huong VTQ, Hirayama K. A Proteomic Approach Identifies Candidate Early Biomarkers to Predict Severe Dengue in Children. PLoS Negl Trop Dis 2016; 10:e0004435. [PMID: 26895439 PMCID: PMC4764501 DOI: 10.1371/journal.pntd.0004435] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [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: 07/25/2015] [Accepted: 01/14/2016] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Severe dengue with severe plasma leakage (SD-SPL) is the most frequent of dengue severe form. Plasma biomarkers for early predictive diagnosis of SD-SPL are required in the primary clinics for the prevention of dengue death. METHODOLOGY Among 63 confirmed dengue pediatric patients recruited, hospital based longitudinal study detected six SD-SPL and ten dengue with warning sign (DWS). To identify the specific proteins increased or decreased in the SD-SPL plasma obtained 6-48 hours before the shock compared with the DWS, the isobaric tags for relative and absolute quantification (iTRAQ) technology was performed using four patients each group. Validation was undertaken in 6 SD-SPL and 10 DWS patients. PRINCIPAL FINDINGS Nineteen plasma proteins exhibited significantly different relative concentrations (p<0.05), with five over-expressed and fourteen under-expressed in SD-SPL compared with DWS. The individual protein was classified to either blood coagulation, vascular regulation, cellular transport-related processes or immune response. The immunoblot quantification showed angiotensinogen and antithrombin III significantly increased in SD-SPL whole plasma of early stage compared with DWS subjects. Even using this small number of samples, antithrombin III predicted SD-SPL before shock occurrence with accuracy. CONCLUSION Proteins identified here may serve as candidate predictive markers to diagnose SD-SPL for timely clinical management. Since the number of subjects are small, so further studies are needed to confirm all these biomarkers.
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Affiliation(s)
- Dang My Nhi
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Nguyen Tien Huy
- Department of Clinical Product Development, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
- * E-mail: (NTH); (KH)
| | - Kaname Ohyama
- Department of Environmental and Pharmaceutical Sciences, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
- Nagasaki University Research Centre for Genomic Instability and Carcinogenesis (NRGIC), Nagasaki, Japan
| | - Daisuke Kimura
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Nguyen Thi Phuong Lan
- Department of Immunology and Microbiology, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Leo Uchida
- Department of Virology, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Nguyen Van Thuong
- Department of Immunology and Microbiology, Pasteur Institute, Ho Chi Minh City, Vietnam
| | | | - Le Hong Phuc
- Nguyen Dinh Chieu Hospital, Ben Tre Province, Vietnam
| | - Nguyen Thi Mai
- Department of Immunology and Microbiology, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Shusaku Mizukami
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Lam Quoc Bao
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | | | | | - Luong Chan Quang
- Department of Immunology and Microbiology, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Juntra Karbwang
- Department of Clinical Product Development, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Katsuyuki Yui
- Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Vu Thi Que Huong
- Department of Immunology and Microbiology, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), and Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
- * E-mail: (NTH); (KH)
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Vasquez Velasquez C, Roman AD, Lan NTP, Huy NT, Mercado ES, Espino FE, Perez MLM, Huong VTQ, Thuy TT, Tham VD, Nga CTP, Ha TTN, Bilar JM, Bajaro JDP, Baello BQ, Kikuchi M, Yasunami M, Morita K, Watanabe N, Karbwang J, Hirayama K. Alpha tryptase allele of Tryptase 1 (TPSAB1) gene associated with Dengue Hemorrhagic Fever (DHF) and Dengue Shock Syndrome (DSS) in Vietnam and Philippines. Hum Immunol 2015; 76:318-23. [DOI: 10.1016/j.humimm.2015.03.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2014] [Revised: 03/03/2015] [Accepted: 03/11/2015] [Indexed: 01/19/2023]
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Mangione JNA, Huy NT, Lan NTP, Mbanefo EC, Ha TTN, Bao LQ, Nga CTP, Tuong VV, Dat TV, Thuy TT, Tuan HM, Huong VTQ, Hirayama K. The association of cytokines with severe dengue in children. Trop Med Health 2014; 42:137-44. [PMID: 25589878 PMCID: PMC4253061 DOI: 10.2149/tmh.2014-09] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [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: 05/20/2014] [Accepted: 07/16/2014] [Indexed: 01/22/2023] Open
Abstract
Background: Dengue virus infection is a major public health problem. A hypothesis put forward for severe dengue is the cytokine storm, a sudden increase in cytokines that induces vascular permeability. Previous studies and our recent meta-analysis showed that IL-6, IL-8, IFNγ, TNFα, VEGF-A and VCAM-1 are associated with dengue shock syndrome. Therefore, in this study we aim to validate the association of these cytokines with severe dengue. Methods & Findings: In a hospital based-case control study in Vietnam, children with dengue fever, other febrile illness and healthy controls were recruited. Dengue virus infection was confirmed by several diagnostic tests. Multiplex immunoassay using Luminex technology was used to measure cytokines simultaneously. A positive association with dengue shock syndrome was found for VCAM-1, whereas a negative association was found for IFNγ. Furthermore, multivariate logistic analysis also showed that VCAM-1 and IFNγ were independently correlated with dengue shock syndrome. Conclusion: IFNγ and VCAM-1 were associated with dengue shock syndrome, although their role in the severe dengue pathogenesis remains unclear. Additional studies are required to shed further light on the function of these cytokines in severe dengue.
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Affiliation(s)
- Julia N A Mangione
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University , 1-12-4 Sakamoto, Nagasaki 852-8523, Japan ; Leiden University Medical Center , C-2-R, P.O. Box 9600, 2300 RC Leiden, the Netherlands
| | - Nguyen Tien Huy
- Department of Clinical Product Development, Institute of Tropical Medicine (NEKKEN), Nagasaki University , 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Nguyen Thi Phuong Lan
- Department of Immunology & Microbiology, Pasteur Institute in Ho Chi Minh City , 167 Pasteur Street, Ho Chi Minh City 70000, Vietnam
| | - Evaristus Chibunna Mbanefo
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University , 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Tran Thi Ngoc Ha
- Laboratory of Arbovirus, Pasteur Institute in Ho Chi Minh City , 167 Pasteur Street, Ho Chi Minh City 70000, Vietnam
| | - Lam Quoc Bao
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University , 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Cao Thi Phi Nga
- Center for Preventive Medicine , 24 Hung Vuong Street, Vinh Long, Ho Chi Minh City 89000, Vietnam
| | - Vo Van Tuong
- Center for Preventive Medicine , 24 Hung Vuong Street, Vinh Long, Ho Chi Minh City 89000, Vietnam
| | - Tran Van Dat
- Center for Preventive Medicine , 24 Hung Vuong Street, Vinh Long, Ho Chi Minh City 89000, Vietnam
| | - Tran Thi Thuy
- Children's Hospital No.2 , 14 Ly Tu Trong street, Ho Chi Minh City 70000, Vietnam
| | - Ha Manh Tuan
- Children's Hospital No.2 , 14 Ly Tu Trong street, Ho Chi Minh City 70000, Vietnam
| | - Vu Thi Que Huong
- Laboratory of Arbovirus, Pasteur Institute in Ho Chi Minh City , 167 Pasteur Street, Ho Chi Minh City 70000, Vietnam
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University , 1-12-4 Sakamoto, Nagasaki 852-8523, Japan ; Program for Leading Graduate Schools, Nagasaki University , 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
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Huy NT, Thao NTH, Ha TTN, Lan NTP, Nga PTT, Thuy TT, Tuan HM, Nga CTP, Tuong VV, Dat TV, Huong VTQ, Karbwang J, Hirayama K. Development of clinical decision rules to predict recurrent shock in dengue. Crit Care 2013; 17:R280. [PMID: 24295509 PMCID: PMC4057383 DOI: 10.1186/cc13135] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 11/01/2013] [Indexed: 11/10/2022]
Abstract
INTRODUCTION Mortality from dengue infection is mostly due to shock. Among dengue patients with shock, approximately 30% have recurrent shock that requires a treatment change. Here, we report development of a clinical rule for use during a patient's first shock episode to predict a recurrent shock episode. METHODS The study was conducted in Center for Preventive Medicine in Vinh Long province and the Children's Hospital No. 2 in Ho Chi Minh City, Vietnam. We included 444 dengue patients with shock, 126 of whom had recurrent shock (28%). Univariate and multivariate analyses and a preprocessing method were used to evaluate and select 14 clinical and laboratory signs recorded at shock onset. Five variables (admission day, purpura/ecchymosis, ascites/pleural effusion, blood platelet count and pulse pressure) were finally trained and validated by a 10-fold validation strategy with 10 times of repetition, using a logistic regression model. RESULTS The results showed that shorter admission day (fewer days prior to admission), purpura/ecchymosis, ascites/pleural effusion, low platelet count and narrow pulse pressure were independently associated with recurrent shock. Our logistic prediction model was capable of predicting recurrent shock when compared to the null method (P < 0.05) and was not outperformed by other prediction models. Our final scoring rule provided relatively good accuracy (AUC, 0.73; sensitivity and specificity, 68%). Score points derived from the logistic prediction model revealed identical accuracy with AUCs at 0.73. Using a cutoff value greater than -154.5, our simple scoring rule showed a sensitivity of 68.3% and a specificity of 68.2%. CONCLUSIONS Our simple clinical rule is not to replace clinical judgment, but to help clinicians predict recurrent shock during a patient's first dengue shock episode.
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Huy NT, Hang LTT, Boamah D, Lan NTP, Van Thanh P, Watanabe K, Huong VTT, Kikuchi M, Ariyoshi K, Morita K, Hirayama K. Development of a single-tube loop-mediated isothermal amplification assay for detection of four pathogens of bacterial meningitis. FEMS Microbiol Lett 2012; 337:25-30. [PMID: 22946506 DOI: 10.1111/1574-6968.12002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2012] [Revised: 08/29/2012] [Accepted: 08/30/2012] [Indexed: 11/29/2022] Open
Abstract
Several loop-mediated isothermal amplification (LAMP) assays have been developed to detect common causative pathogens of bacterial meningitis (BM). However, no LAMP assay is reported to detect Streptococcus agalactiae and Streptococcus suis, which are also among common pathogens of BM. Moreover, it is laborious and expensive by performing multiple reactions for each sample to detect bacterial pathogen. Thus, we aimed to design and develop a single-tube LAMP assay capable of detecting multiple bacterial species, based on the nucleotide sequences of the 16S rRNA genes of the bacteria. The nucleotide sequences of the 16S rRNA genes of main pathogens involved in BM were aligned to identify conserved regions, which were further used to design broad range specific LAMP assay primers. We successfully designed a set of broad range specific LAMP assay primers for simultaneous detection of four species including Staphylococcus aureus, Streptococcus pneumoniae, S. suis and S. agalactiae. The broad range LAMP assay was highly specific without cross-reactivity with other bacteria including Haemophilus influenzae, Neisseria meningitidis and Escherichia coli. The sensitivity of our LAMP assay was 100-1000 times higher compared with the conventional PCR assay. The bacterial species could be identified after digestion of the LAMP products with restriction endonuclease DdeI and HaeIII.
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Affiliation(s)
- Nguyen Tien Huy
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Sakamoto, Nagasaki, Japan
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Furuta T, Murao LA, Lan NTP, Huy NT, Huong VTQ, Thuy TT, Tham VD, Nga CTP, Ha TTN, Ohmoto Y, Kikuchi M, Morita K, Yasunami M, Hirayama K, Watanabe N. Association of mast cell-derived VEGF and proteases in Dengue shock syndrome. PLoS Negl Trop Dis 2012; 6:e1505. [PMID: 22363824 PMCID: PMC3283553 DOI: 10.1371/journal.pntd.0001505] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [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: 05/09/2011] [Accepted: 12/20/2011] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Recent in-vitro studies have suggested that mast cells are involved in Dengue virus infection. To clarify the role of mast cells in the development of clinical Dengue fever, we compared the plasma levels of several mast cell-derived mediators (vascular endothelial cell growth factor [VEGF], soluble VEGF receptors [sVEGFRs], tryptase, and chymase) and -related cytokines (IL-4, -9, and -17) between patients with differing severity of Dengue fever and healthy controls. METHODOLOGY/PRINCIPAL FINDINGS The study was performed at Children's Hospital No. 2, Ho Chi Minh City, and Vinh Long Province Hospital, Vietnam from 2002 to 2005. Study patients included 103 with Dengue fever (DF), Dengue hemorrhagic fever (DHF), and Dengue shock syndrome (DSS), as diagnosed by the World Health Organization criteria. There were 189 healthy subjects, and 19 febrile illness patients of the same Kinh ethnicity. The levels of mast cell-derived mediators and -related cytokines in plasma were measured by ELISA. VEGF and sVEGFR-1 levels were significantly increased in DHF and DSS compared with those of DF and controls, whereas sVEGFR-2 levels were significantly decreased in DHF and DSS. Significant increases in tryptase and chymase levels, which were accompanied by high IL-9 and -17 concentrations, were detected in DHF and DSS patients. By day 4 of admission, VEGF, sVEGFRs, and proteases levels had returned to similar levels as DF and controls. In-vitro VEGF production by mast cells was examined in KU812 and HMC-1 cells, and was found to be highest when the cells were inoculated with Dengue virus and human Dengue virus-immune serum in the presence of IL-9. CONCLUSIONS As mast cells are an important source of VEGF, tryptase, and chymase, our findings suggest that mast cell activation and mast cell-derived mediators participate in the development of DHF. The two proteases, particularly chymase, might serve as good predictive markers of Dengue disease severity.
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Affiliation(s)
- Takahisa Furuta
- Division of Infectious Genetics, Institute of Medical Science, University of Tokyo, Tokyo, Japan.
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Abstract
Epidemiological evidence indicates that host genetic factors are relevant and predispose DHF/DSS development. Here, we review the host genetic studies concerning human leucocyte antigens, antibody receptors, immune/inflammatory mediators, attachment molecules, cytokines and other factors exerting an immunoregulatory effect as well as the current genome-wide association studies. We also discuss some viewpoints on future challenges related to the design of safe and effective prevention and treatment options.
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Affiliation(s)
- Nguyen Thi Phuong Lan
- Department of Microbiology and Immunology, Pasteur Institute Ho Chi Minh City, Vietnam
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Ha TTN, Huy NT, Murao LA, Lan NTP, Thuy TT, Tuan HM, Nga CTP, Tuong VV, Dat TV, Kikuchi M, Yasunami M, Morita K, Huong VTQ, Hirayama K. Elevated levels of cell-free circulating DNA in patients with acute dengue virus infection. PLoS One 2011; 6:e25969. [PMID: 22016795 PMCID: PMC3189230 DOI: 10.1371/journal.pone.0025969] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [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: 03/31/2011] [Accepted: 09/14/2011] [Indexed: 11/24/2022] Open
Abstract
Background Apoptosis is thought to play a role in the pathogenesis of severe dengue and the release of cell-free DNA into the circulatory system in several medical conditions. Therefore, we investigated circulating DNA as a potential biomarker for severe dengue. Methods and Findings A direct fluorometric degradation assay using PicoGreen was performed to quantify cell-free DNA from patient plasma. Circulating DNA levels were significantly higher in patients with dengue virus infection than with other febrile illnesses and healthy controls. Remarkably, the increase of DNA levels correlated with the severity of dengue. Additionally, multivariate logistic regression analysis showed that circulating DNA levels independently correlated with dengue shock syndrome. Conclusions Circulating DNA levels were increased in dengue patients and correlated with dengue severity. Additional studies are required to show the benefits of this biomarker in early dengue diagnosis and for the prognosis of shock complication.
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Affiliation(s)
- Tran Thi Ngoc Ha
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Nguyen Tien Huy
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Lyre Anni Murao
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | | | - Tran Thi Thuy
- Children's Hospital No. 2, Ho Chi Minh City, Vietnam
| | - Ha Manh Tuan
- Children's Hospital No. 2, Ho Chi Minh City, Vietnam
| | | | - Vo Van Tuong
- Center for Preventive Medicine, Vinh Long, Vietnam
| | - Tran Van Dat
- Center for Preventive Medicine, Vinh Long, Vietnam
| | - Mihoko Kikuchi
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Michio Yasunami
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Vu Thi Que Huong
- Laboratory of Arbovirus, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global COE program, Nagasaki University, Nagasaki, Japan
- * E-mail:
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Huy NT, Hamada M, Kikuchi M, Lan NTP, Yasunami M, Zamora J, Hirayama K. Association of HLA and post-schistosomal hepatic disorder: a systematic review and meta-analysis. Parasitol Int 2011; 60:347-56. [PMID: 21664486 DOI: 10.1016/j.parint.2011.05.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Revised: 05/11/2011] [Accepted: 05/26/2011] [Indexed: 12/23/2022]
Abstract
Several human genetic variants, HLA antigens and alleles are reportedly linked to post-schistosomal hepatic disorder (PSHD), but the results from these reports are highly inconclusive. In order to estimate overall associations between human genetic variants, HLA antigens, HLA alleles and PSHD, we systematically reviewed and performed a meta-analysis of relevant studies in both post-schistosomal hepatic disorder and post-schistosomal non-hepatic disorder patients. PubMed, Scopus, Google Scholar, The HuGE Published Literature database, Cochrane Library, and manual search of reference lists of articles published before July 2009 were used to retrieve relevant studies. Two reviewers independently selected articles and extracted data on study characteristics and data regarding the association between genetic variants, HLA antigens, HLA alleles and PSHD in the form of 2×2 tables. A meta-analysis using fixed-effects or random-effects models to pooled odds ratios (OR) with corresponding 95% confidence intervals were calculated only if more than one study had investigated particular variation. We found 17 articles that met our eligibility criteria. Schistosoma mansoni and Schistosoma japonicum were reported as the species causing PSHD. Since human genetic variants were only investigated in one study, these markers were not assessed by meta-analysis. Thus, only HLA-genes (a total of 66 HLA markers) were conducted in the meta-analysis. Our meta-analysis showed that human leucocyte antigens HLA-DQB1*0201 (OR=2.64, P=0.018), DQB1*0303 (OR=1.93, P=0.008), and DRB1*0901 (OR=2.14, P=0.002) alleles and HLA-A1 (OR=5.10, P=0.001), A2 (OR=2.17, P=0.005), B5 (OR=4.63, P=0.001), B8 (OR=2.99, P=0.02), and B12 (OR=5.49, P=0.005) serotypes enhanced susceptibility to PSHD, whereas HLA-DQA1*0501 (OR=0.29, P≤0.001) and DQB1*0301 (OR=0.58, P=0.007) were protective factors against the disease. We further suggested that the DRB1*0901-DQB1*0201, DRB1*0901-DQB1*0303 and A1-B8 haplotypes enhanced susceptibility to PSHD, whereas DQA1*0501-DQB1*0301 linkage decreased the risk of PSHD. The result improved our understanding of the association between the HLA loci and PSHD with regard to pathogenic or protective T-cells and provided novel evidence that HLA alleles may influence disease severity.
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Affiliation(s)
- Nguyen Tien Huy
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Sakamoto, Nagasaki, Japan.
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The Tai D, Vinh Thuy A, Nhi NTN, Ngoc NTK, Lan NTP. Virulence and antimicrobial resistance characteristics of Vibrio parahaemolyticus isolated from environment, food and clinical samples in the south of Vietnam, 2010. BMC Proc 2011. [PMCID: PMC3019525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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The Tai D, Vinh Thuy A, Nhi NTN, Ngoc NTK, Lan NTP. Virulence and antimicrobial resistance characteristics of Vibrio parahaemolyticus isolated from environment, food and clinical samples in the south of Vietnam, 2010. BMC Proc 2011. [DOI: 10.1186/1753-6561-5-s1-p94] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Lan NTP, Kikuchi M, Huong VTQ, Ha DQ, Thuy TT, Tham VD, Tuan HM, Tuong VV, Nga CTP, Van Dat T, Oyama T, Morita K, Yasunami M, Hirayama K. Protective and enhancing HLA alleles, HLA-DRB1*0901 and HLA-A*24, for severe forms of dengue virus infection, dengue hemorrhagic fever and dengue shock syndrome. PLoS Negl Trop Dis 2008; 2:e304. [PMID: 18827882 PMCID: PMC2553281 DOI: 10.1371/journal.pntd.0000304] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [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: 12/18/2007] [Accepted: 08/29/2008] [Indexed: 11/18/2022] Open
Abstract
Background Dengue virus (DV) infection is one of the most important mosquito-borne diseases in the tropics. Recently, the severe forms, dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS), have become the leading cause of death among children in Southern Vietnam. Protective and/or pathogenic T cell immunity is supposed to be important in the pathogenesis of DHF and DSS. Methodology/Principal Findings To identify HLA alleles controlling T cell immunity against dengue virus (DV), we performed a hospital-based case control study at Children's Hospital No.2, Ho Chi Minh City (HCMC), and Vinh Long Province Hospital (VL) in Southern Vietnam from 2002 to 2005. A total of 211 and 418 patients with DHF and DSS, respectively, diagnosed according to the World Health Organization (WHO) criteria, were analyzed for their characteristic HLA-A, -B and -DRB1 alleles. Four hundred fifty healthy children (250 from HCMC and 200 from VL) of the same Kinh ethnicity were also analyzed as population background. In HLA class I, frequency of the HLA-A*24 showed increased tendency in both DHF and DSS patients, which reproduced a previous study. The frequency of A*24 with histidine at codon 70 (A*2402/03/10), based on main anchor binding site specificity analysis in DSS and DHF patients, was significantly higher than that in the population background groups (HCMC 02-03 DSS: OR = 1.89, P = 0.008, DHF: OR = 1.75, P = 0.033; VL 02-03 DSS: OR = 1.70, P = 0.03, DHF: OR = 1.46, P = 0.38; VL 04-05 DSS: OR = 2.09, P = 0.0075, DHF: OR = 2.02, P = 0.038). In HLA class II, the HLA-DRB1*0901 frequency was significantly decreased in secondary infection of DSS in VL 04-05 (OR = 0.35, P = 0.0025, Pc = 0.03). Moreover, the frequency of HLA-DRB1*0901 in particular was significantly decreased in DSS when compared with DHF in DEN-2 infection (P = 0.02). Conclusion This study improves our understanding of the risk of HLA-class I for severe outcome of DV infection in the light of peptide anchor binding site and provides novel evidence that HLA-class II may control disease severity (DHF to DSS) in DV infection. Dengue has become one of the most common viral diseases transmitted by infected mosquitoes (with any of the four dengue virus serotypes: DEN-1, -2, -3, or -4). It may present as asymptomatic or illness, ranging from mild to severe disease. Recently, the severe forms, dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS), have become the leading cause of death among children in Southern Vietnam. The pathogenesis of DHF/DSS, however, is not yet completely understood. The immune response, virus virulence, and host genetic background are considered to be risk factors contributing to disease severity. Human leucocyte antigens (HLA) expressed on the cell surface function as antigen presenting molecules and those polymorphism can change individuals' immune response. We investigated the HLA-A, -B (class I), and -DRB1 (class II) polymorphism in Vietnamese children with different severity (DHF/DSS) by a hospital-based case-control study. The study showed persons carrying HLA-A*2402/03/10 are about 2 times more likely to have severe dengue infection than others. On the other hand, HLA-DRB1*0901 persons are less likely to develop DSS with DEN-2 virus infection. These results clearly demonstrated that HLA controlled the susceptibility to severe forms of DV infection.
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Affiliation(s)
- Nguyen Thi Phuong Lan
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Japan
| | - Mihoko Kikuchi
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Japan
- Center of International Collaborative Research, Nagasaki University, Japan
| | - Vu Thi Que Huong
- Laboratory of Arbovirus, Pasteur Institute in Ho Chi Minh City, Vietnam
| | - Do Quang Ha
- Laboratory of Arbovirus, Pasteur Institute in Ho Chi Minh City, Vietnam
| | | | - Vo Dinh Tham
- Children's Hospital No.2, Ho Chi Minh City, Vietnam
| | - Ha Manh Tuan
- Children's Hospital No.2, Ho Chi Minh City, Vietnam
| | - Vo Van Tuong
- Center for Preventive Medicine, Vinh Long Province, Vietnam
| | | | - Tran Van Dat
- Center for Preventive Medicine, Vinh Long Province, Vietnam
| | - Toshifumi Oyama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Japan
| | - Kouichi Morita
- Global COE program, Nagasaki University, Japan
- Department of Virology, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Japan
| | - Michio Yasunami
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Japan
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Japan
- Center of International Collaborative Research, Nagasaki University, Japan
- Global COE program, Nagasaki University, Japan
- * E-mail:
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Mossoro C, Glaziou P, Yassibanda S, Lan NTP, Bekondi C, Minssart P, Bernier C, Le Bouguénec C, Germani Y. Chronic diarrhea, hemorrhagic colitis, and hemolytic-uremic syndrome associated with HEp-2 adherent Escherichia coli in adults infected with human immunodeficiency virus in Bangui, Central African Republic. J Clin Microbiol 2002; 40:3086-8. [PMID: 12149388 PMCID: PMC120615 DOI: 10.1128/jcm.40.8.3086-3088.2002] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2002] [Revised: 03/21/2002] [Accepted: 05/07/2002] [Indexed: 11/20/2022] Open
Abstract
In human immunodeficiency virus (HIV)-infected adults from the Central African Republic, the occurrence of chronic diarrhea due to HEp-2 adherent Escherichia coli (EAEC) harboring virulence markers (eaeA, BFP, EAF, astA determinant of EAST/1, positive FAS test, enteropathogenic E. coli O serogroup) was shown to be associated with AIDS. We also show that EAEC that produce verotoxin (Stx2) but do not harbor the genetic markers for classical enterohemorrhagic E. coli are involved in hemorrhagic colitis and hemolytic-uremic syndrome in patients with HIV.
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Affiliation(s)
- Christian Mossoro
- Unité des Maladies Infectieuses Opportunistes, Institut Pasteur de Bangui, Central African Republic
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