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Sinha M, Chakraborty U, Kool A, Chakravarti M, Das S, Ghosh S, Thakur L, Khuranna A, Nayak D, Basu B, Kar S, Ray R, Das S. In-vitro antiviral action of Eupatorium perfoliatum against dengue virus infection: Modulation of mTOR signaling and autophagy. JOURNAL OF ETHNOPHARMACOLOGY 2022; 282:114627. [PMID: 34509603 DOI: 10.1016/j.jep.2021.114627] [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: 05/13/2021] [Revised: 08/26/2021] [Accepted: 09/08/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Dengue virus (DENV) is a re-emerging mosquito-borne flavivirus that has recently engendered large epidemics around the world. Consequently antivirals with effective anti-DENV therapeutic activity are urgently required. In the 18th century, Europeans, as well as native inhabitants of North America, were known to adapt the medicinal property of the common perennial plant Eupatorium perfoliatum L. to treat fever and infections. Previous studies have shown that Eupatorium perfoliatum L. possesses anti-inflammatory, anti-oxidative, anti-plasmodial, anti-bacterial and antiviral activities. However, to the best of our knowledge, no anti-DENV activity of E. perfoliatum L. has been investigated at the molecular level so far. AIM OF STUDY Here, for the first time we have attempted to study the action of E. perfoliatum extract and its few bioactive components i.e., quercetin, caffeic acid and eupafolin against wild primary clinical isolate of DENV-2 infection in an in vitro model. MATERIALS AND METHODS The presence of the bioactive components in the E. perfoliatum extract, were analyzed by HPLC- DAD. Then, CC50 as well as IC50 values of the extract and its bioactive components were measured against DENV in HepG2 cell line. After that, the antiviral activity was studied by Time of addition assay using qRT-PCR. Further, the downstream signalling action of E. perfoliatum extract, was studied by Human phosphorylation MAPK antibody array, followed by immunofluorescence microscopy. Moreover, a molecular docking analysis was done to study the binding affinity of bioactive components of E. perfoliatum extract with TIM-1 transmembrane receptor protein, which is known for viral internalization. RESULT We found that E. perfoliatum extract has marked antiviral activity during pre-treatment against DENV infection in HepG2 cell line. The extract also significantly reduced the DENV induced autophagy in HepG2 cell line as detected by LC3 II localization. The presence of different bioactive compounds in E. perfoliatum extract were confirmed by HPLC-DAD. In the bioactive components, in parallel to earlier studies, quercetin showed the most significant preventive action against DENV infection. Further, in molecular docking analysis also, quercetin showed the strongest binding affinity towards DENV membrane receptor TIM-1 protein. CONCLUSION Our findings suggests that E. perfoliatum extract has significant potential to be an anti-DENV therapeutic agent. Moreover, among the bioactive components, quercetin may have a prophylaxis role in executing the antiviral activity of E. perfoliatum extract against DENV infection.
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Affiliation(s)
- Moonmoon Sinha
- Department of Microbiology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata-700019, India; Department of Virology, Dr. Anjali Chatterjee Regional Research Institute, Kolkata-700035, India; Department of Microbiology, Institute of Post Graduate Medical Education and Research, Kolkata-700020, India.
| | - Urmita Chakraborty
- Department of Virology, Dr. Anjali Chatterjee Regional Research Institute, Kolkata-700035, India.
| | - Anirban Kool
- Department of Virology, Dr. Anjali Chatterjee Regional Research Institute, Kolkata-700035, India.
| | - Mousumi Chakravarti
- Department of Virology, Dr. Anjali Chatterjee Regional Research Institute, Kolkata-700035, India.
| | - Souvik Das
- Department of Neuroendocrinology and Experimental Hematology, Chittaranjan National Cancer Institute, Kolkata-700026, India.
| | - Sandip Ghosh
- Department of Neuroendocrinology and Experimental Hematology, Chittaranjan National Cancer Institute, Kolkata-700026, India.
| | - Lovnish Thakur
- School of Biosciences, Apeejay Stya University, Gurugram, Haryana-122103, India.
| | - Anil Khuranna
- Central Council for Research in Homoeopathy, Ministry of AYUSH, Govt. of India, Janakpuri, New Delhi-111058, India.
| | - Debadatta Nayak
- Central Council for Research in Homoeopathy, Ministry of AYUSH, Govt. of India, Janakpuri, New Delhi-111058, India.
| | - Biswarup Basu
- Department of Neuroendocrinology and Experimental Hematology, Chittaranjan National Cancer Institute, Kolkata-700026, India.
| | - Subhabrata Kar
- School of Biosciences, Apeejay Stya University, Gurugram, Haryana-122103, India.
| | - Raja Ray
- Department of Microbiology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata-700019, India; Department of Microbiology, Institute of Post Graduate Medical Education and Research, Kolkata-700020, India.
| | - Satadal Das
- Department of Virology, Dr. Anjali Chatterjee Regional Research Institute, Kolkata-700035, India.
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Chang CH, Liu YT, Weng SC, Chen IY, Tsao PN, Shiao SH. The non-canonical Notch signaling is essential for the control of fertility in Aedes aegypti. PLoS Negl Trop Dis 2018; 12:e0006307. [PMID: 29505577 PMCID: PMC5854436 DOI: 10.1371/journal.pntd.0006307] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 03/15/2018] [Accepted: 02/08/2018] [Indexed: 01/03/2023] Open
Abstract
The Notch signaling pathway is a highly evolutionarily-conserved cell-cell signaling pathway that regulates many events during development. It plays a pivotal role in the regulation of fundamental cellular processes, such as cell proliferation, stem cell maintenance, and differentiation during embryonic and adult development. However, functions of Notch signaling in Aedes aegypti, the major mosquito vector for dengue, are largely unknown. In this study, we identified a unique feature of A. aegypti Notch (AaNotch) in the control of the sterile-like phenotype in female mosquitoes. Silencing AaNotch with a reverse genetic approach significantly reduced the fecundity and fertility of the mosquito. Silencing AaNotch also resulted in the prevention of micropyle formation, which led to impaired fertilization. In addition, JNK phosphorylation (a signaling molecule in the non-canonical Notch signaling pathway) was inhibited in the absence of AaNotch. Furthermore, treatment with a JNK inhibitor in the mosquito resulted in impaired fecundity and fertility. Taken together, our results demonstrate that non-canonical Notch signaling is essential for controlling fertility in the A. aegypti mosquito.
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Affiliation(s)
- Chia-Hao Chang
- Department of Parasitology, National Taiwan University, Taipei, Taiwan
| | - Yu-Ting Liu
- Department of Parasitology, National Taiwan University, Taipei, Taiwan
| | - Shih-Che Weng
- Department of Parasitology, National Taiwan University, Taipei, Taiwan
| | - I-Yi Chen
- Department of Parasitology, National Taiwan University, Taipei, Taiwan
| | - Po-Nien Tsao
- Department of Pediatrics, National Taiwan University Hospital, Taipei, Taiwan
- Research Center for Developmental Biology & Regeneration Medicine, National Taiwan University, Taipei, Taiwan
| | - Shin-Hong Shiao
- Department of Parasitology, National Taiwan University, Taipei, Taiwan
- * E-mail:
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Malisheni M, Khaiboullina SF, Rizvanov AA, Takah N, Murewanhema G, Bates M. Clinical Efficacy, Safety, and Immunogenicity of a Live Attenuated Tetravalent Dengue Vaccine (CYD-TDV) in Children: A Systematic Review with Meta-analysis. Front Immunol 2017; 8:863. [PMID: 28824613 PMCID: PMC5543029 DOI: 10.3389/fimmu.2017.00863] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Accepted: 07/07/2017] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Dengue hemorrhagic fever is the leading cause of hospitalization and death in children living in Asia and Latin America. There is an urgent need for an effective and safe dengue vaccine to reduce morbidity and mortality in this high-risk population given the lack of dengue specific treatment at present. This review aims to determine the efficacy, safety, and immunogenicity of CYD-TDV vaccine in children. METHODS This is a systematic review including meta-analysis of randomized controlled clinical trial data from Embase, Medline, the Cochrane Library, Web of Science, and ClinicalTrials.gov. Studies that assessed CYD-TDV vaccine efficacy [(1 - RR)*100], safety (RR), and immunogenicity (weighted mean difference) in children were included in this study. Random effects model was employed to analyze patient-level data extracted from primary studies. RESULTS The overall efficacy of CYD-TDV vaccine was 54% (40-64), while serotype-specific efficacy was 77% (66-85) for DENV4, 75% (65-82) for DENV3, 50% (36-61) for DENV1, and 34% (14-49) for DENV2. 15% (-174-74) vaccine efficacy was obtained for the unknown serotype. Meta-analysis of included studies with longer follow-up time (25 months) revealed that CYD-TDV vaccine significantly increased the risk of injection site reactions (RR = 1.1: 1.04-1.17; p-value = 0.001). Immunogenicity (expressed as geometric mean titers) in descending order was 439.7 (331.7-547.7), 323 (247 - 398.7), 144.1 (117.9-170.2), and 105 (88.7-122.8) for DENV3, DENV2, DENV1, and DENV4, respectively. CONCLUSION CYD-TDV vaccine is effective and immunogenic in children overall. Reduced efficacy of CYD-TDV vaccine against DENV2 notoriously known for causing severe dengue infection and dengue outbreaks cause for serious concern. Post hoc meta-analysis of long-term follow-up data (≥25 months) from children previously vaccinated with CYD-TDV vaccine is needed to make a conclusion regarding CYD-TDV vaccine safety in children. However, CYD-TDV vaccine should be considered for use in regions where DENV2 is not endemic as currently there is no specific treatment for dengue infection.
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Affiliation(s)
- Moffat Malisheni
- Ministry of Health, Lusaka, Zambia
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, United Kingdom
- Department of Microbiology and Immunology, National University of Singapore, Singapore, Singapore
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore, Singapore
| | - Svetlana F Khaiboullina
- Department of Microbiology and Immunology, University of Nevada Reno, Reno, NV, United States
- Kazan Federal University, Kazan, Russia
| | | | - Noah Takah
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, United Kingdom
- Ministry of Health, Yaounde, Cameroon
| | - Grant Murewanhema
- Institute of Health and Wellbeing, University of Glasgow, Glasgow, United Kingdom
- College of Health Sciences, University of Zimbabwe, Harare, Zimbabwe
| | - Matthew Bates
- University College London Research & Training Programme, University of Zambia, University Teaching Hospital, Lusaka, Zambia
- HerpeZ, University Teaching Hospital, Lusaka, Zambia
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Alagarasu K, Bachal RV, Shah PS, Cecilia D. Profile of killer cell immunoglobulin-like receptor and its human leucocyte antigen ligands in dengue-infected patients from Western India. Int J Immunogenet 2015; 42:432-8. [PMID: 26385514 DOI: 10.1111/iji.12231] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2014] [Revised: 07/10/2015] [Accepted: 07/19/2015] [Indexed: 11/29/2022]
Abstract
Killer cell immunoglobulin-like receptors (KIRs) regulate the activation of natural killer cells (NKs). Qualitative and quantitative differences in the type and the number of KIRs expressed on NK cells affect its activation which would influence the outcome of the disease. In this study, 114 hospitalized cases of dengue [82 dengue fever (DF) and 32 dengue haemorrhagic fever (DHF) cases] and 104 healthy controls (HC) without no known history of hospitalization for dengue-like illness were investigated for their KIR gene profile to find out the association of KIR genes with dengue disease severity. KIR gene profile was investigated using duplex sequence-specific priming polymerase chain reaction-based typing system. The results revealed a higher frequency of KIR3DL1 gene [P = 0.0225; odds ratio (OR) 4.1 95% confidence interval (CI) 1.1-14.8] and lower frequency of KIR3DS1/3DS1 genotype [P = 0.0225; OR 0.24 95% CI (0.068-0.88)] in DF cases compared to HC. Immunoglobulin-like receptor gene frequencies were not different between DHF and DF or HC. The results suggest that KIR3DL1/KIR3DS1 locus might be associated with the risk of developing DF.
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Affiliation(s)
- K Alagarasu
- Dengue/Chikungunya Group, National Institute of Virology (ICMR), Pune, India
| | - R V Bachal
- Dengue/Chikungunya Group, National Institute of Virology (ICMR), Pune, India
| | - P S Shah
- Dengue/Chikungunya Group, National Institute of Virology (ICMR), Pune, India
| | - D Cecilia
- Dengue/Chikungunya Group, National Institute of Virology (ICMR), Pune, India
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Epidemiological Scenario of Dengue in Brazil. BIOMED RESEARCH INTERNATIONAL 2015; 2015:321873. [PMID: 26413514 PMCID: PMC4568054 DOI: 10.1155/2015/321873] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Accepted: 08/09/2015] [Indexed: 01/12/2023]
Abstract
Dengue is the most important reemerging mosquito-borne viral disease worldwide. It is caused by any of four Dengue virus types or serotypes (DENV-1 to DENV-4) and is transmitted by mosquitoes from the genus Aedes. Ecological changes have favored the geographic expansion of the vector and, since the dengue pandemic in the Asian and Pacific regions, the infection became widely distributed worldwide, reaching Brazil in 1845. The incidence of dengue in Brazil has been frequently high, and the number of cases in the country has at some point in time represented up to 60% of the dengue reported cases worldwide. This review addresses vector distribution, dengue outbreaks, circulating serotypes and genotypes, and prevention approaches being utilized in Brazil.
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Bhardwaj RK. Dengue Fever: A Bibliometric Analysis of India’s Contributions to the Research Literature of This Dangerous Tropical Disease. ACTA ACUST UNITED AC 2014. [DOI: 10.1080/0194262x.2014.943117] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Pastor AF, Moura LR, Neto JW, Nascimento EJ, Calzavara-Silva CE, Gomes ALV, da Silva AM, Cordeiro MT, Braga-Neto U, Crovella S, Gil LH, Marques ET, Acioli-Santos B. Complement factor H gene (CFH) polymorphisms C-257T, G257A and haplotypes are associated with protection against severe dengue phenotype, possible related with high CFH expression. Hum Immunol 2013; 74:1225-30. [PMID: 23747994 PMCID: PMC3909654 DOI: 10.1016/j.humimm.2013.05.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 04/18/2013] [Accepted: 05/29/2013] [Indexed: 10/26/2022]
Abstract
Four genetic polymorphisms located at the promoter (C-257T) and coding regions of CFH gene (exon 2 G257A, exon 14 A2089G and exon 19 G2881T) were investigated in 121 dengue patients (DENV-3) in order to assess the relationship between allele/haplotypes variants and clinical outcomes. A statistical value was found between the CFH-257T allele (TT/TC genotypes) and reduced susceptibility to severe dengue (SD). Statistical associations indicate that individuals bearing a T allele presented significantly higher protein levels in plasma. The -257T variant is located within a NF-κB binding site, suggesting that this variant might have effect on the ability of the CFH gene to respond to signals via the NF-κB pathway. The G257A allelic variant showed significant protection against severe dengue. When CFH haplotypes effect was considered, the ancestral CG/CG promoter-exon 2 SNP genotype showed significant risk to SD either in a general comparison (ancestral × all variant genotypes), as well as in individual genotypes comparison (ancestral × each variant genotype), where the most prevalent effect was observed in the CG/CG × CA/TG comparison. These findings support the involvement of -257T, 257A allele variants and haplotypes on severe dengue phenotype protection, related with high basal CFH expression.
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Affiliation(s)
- André F. Pastor
- Virology and Experimental Therapy Laboratory, FIOCRUZ-PE, Recife, Brazil
- Department of Genetics, Federal University of Pernambuco, Recife, Brazil
| | | | - José W.D. Neto
- Virology and Experimental Therapy Laboratory, FIOCRUZ-PE, Recife, Brazil
| | - Eduardo J.M. Nascimento
- Department of Infectious Diseases and Microbiology, Center for Vaccine Research, University of Pittsburgh, Pittsburgh, USA
| | | | - Ana Lisa V. Gomes
- Virology and Experimental Therapy Laboratory, FIOCRUZ-PE, Recife, Brazil
| | - Ana Maria da Silva
- Virology and Experimental Therapy Laboratory, FIOCRUZ-PE, Recife, Brazil
| | - Marli T. Cordeiro
- Virology and Experimental Therapy Laboratory, FIOCRUZ-PE, Recife, Brazil
| | - Ulisses Braga-Neto
- Department of Electrical and Computer Engineering, Texas A&M University, College Station, USA
| | - Sergio Crovella
- Department of Genetics, Federal University of Pernambuco, Recife, Brazil
| | - Laura H.V.G. Gil
- Virology and Experimental Therapy Laboratory, FIOCRUZ-PE, Recife, Brazil
| | - Ernesto T.A. Marques
- Virology and Experimental Therapy Laboratory, FIOCRUZ-PE, Recife, Brazil
- Department of Infectious Diseases and Microbiology, Center for Vaccine Research, University of Pittsburgh, Pittsburgh, USA
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Nasim A, Anis S, Baqi S, Akhtar SF, Baig-Ansari N. Clinical presentation and outcome of dengue viral infection in live-related renal transplant recipients in Karachi, Pakistan. Transpl Infect Dis 2013; 15:516-25. [PMID: 23890225 DOI: 10.1111/tid.12114] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Revised: 09/27/2012] [Accepted: 01/29/2013] [Indexed: 01/10/2023]
Abstract
INTRODUCTION In Pakistan, dengue viral infection has become hyper-endemic. Renal transplantation is also expanding. We aimed to study dengue in renal transplant recipients (RTR). METHODS We conducted a study of RTR reported to be anti-dengue immunoglobulin-M antibody positive from January 2009 to December 2010 at our institution in Karachi and follow their clinical course and outcome. RESULTS Median age was 28 years; 75 (73.7%) were males. Clinical presentation included fever in 82 (80.4%), gastrointestinal symptoms in 35 (34.3%), hemorrhagic complications in 9 (8.8%), and thrombocytopenia in 97 (95%), which was of >15 days duration in 24%. Fever was seen less frequently in patients on high-dose (>7.5 mg) steroids as compared with low-dose (≤7.5 mg) steroids. Forty-four patients (43%) had primary and 58 (56.8%) had secondary dengue infection. Dengue fever (DF) occurred in 90 (88%), and dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS) occurred in 12 (11.7%). DHF/DSS was seen in 3 (6.8%) of those with primary and in 9 (15.5%) of those with secondary infection (P < 0.22). In secondary infection, patients on cyclosporine-containing regimen had less severe disease, with DHF/DSS in 22% as opposed to DF in 59% (P < 0.04). Of 102 RTR, 68 (66.7%) had graft dysfunction, 5 of whom died. Of the remaining 63, in 54 patients (85.7%) creatinine returned to baseline by an average of 12.6 days. Of 102 patients, 95 (93%) recovered and 7 (6.9%) died, 6 of whom had bacteremia with sepsis and 1 had respiratory failure. None died due to dengue infection alone. CONCLUSION In conclusion, in RTR without life-threatening co-morbidities, the clinical course of dengue infection is mild, with good recovery and preserved renal function.
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Affiliation(s)
- A Nasim
- Department of Infectious Diseases, Sindh Institute of Urology and Transplantation, Karachi, Pakistan
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Rodriguez-Roche R, Gould EA. Understanding the dengue viruses and progress towards their control. BIOMED RESEARCH INTERNATIONAL 2013; 2013:690835. [PMID: 23936833 PMCID: PMC3722981 DOI: 10.1155/2013/690835] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Accepted: 05/08/2013] [Indexed: 01/12/2023]
Abstract
Traditionally, the four dengue virus serotypes have been associated with fever, rash, and the more severe forms, haemorrhagic fever and shock syndrome. As our knowledge as well as understanding of these viruses increases, we now recognise not only that they are causing increasing numbers of human infections but also that they may cause neurological and other clinical complications, with sequelae or fatal consequences. In this review we attempt to highlight some of these features in the context of dengue virus pathogenesis. We also examine some of the efforts currently underway to control this "scourge" of the tropical and subtropical world.
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Affiliation(s)
- Rosmari Rodriguez-Roche
- Pedro Kouri Tropical Medicine Institute, WHO/PAHO Collaborating Centre for the Study of Dengue and Its Vector, Havana, Cuba.
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Immenschuh S, Rahayu P, Bayat B, Saragih H, Rachman A, Santoso S. Antibodies against dengue virus nonstructural protein-1 induce heme oxygenase-1 via a redox-dependent pathway in human endothelial cells. Free Radic Biol Med 2013; 54:85-92. [PMID: 23103292 DOI: 10.1016/j.freeradbiomed.2012.10.551] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2012] [Revised: 10/11/2012] [Accepted: 10/18/2012] [Indexed: 11/24/2022]
Abstract
Heme oxygenase (HO)-1, the inducible isoform of the first and rate-limiting enzyme of heme degradation, affords anti-inflammatory protection via its cell-type-specific effects in endothelial cells (ECs). In dengue hemorrhagic fever (DHF), which is the life-threatening form of dengue virus (DV) infection, endothelial interactions of cross-reactive antibodies against the DV nonstructural glycoprotein-1 (NS1) are associated with endothelial dysfunction. In this study, we investigated whether anti-NS1 antibodies might regulate HO-1 gene expression in human ECs. Serum from DHF patients with high anti-NS1 titers and a monoclonal anti-NS1 antibody upregulated HO-1 gene expression in human umbilical vein ECs, which was blocked by purified NS1 antigen. Immunoprecipitation studies showed that anti-NS1 antibodies specifically bound to the oxidoreductase protein disulfide isomerase (PDI) on ECs. Moreover, anti-NS1-mediated HO-1 induction was reduced by inhibition of PDI enzyme activity. Reactive oxygen species, which were generated by NADPH oxidase and in turn activated the phosphatidylinositol 3-kinase (PI3K)/Akt cascade, were involved in this upregulation of HO-1 gene expression. Finally, apoptosis of ECs caused by anti-NS1 antibodies was increased by pharmacological inhibition of HO-1 enzyme activity. In conclusion, HO-1 gene expression is upregulated by anti-NS1 antibodies via activation of a redox-dependent PDI/PI3K/Akt-mediated pathway in human ECs.
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Affiliation(s)
- Stephan Immenschuh
- Institute for Transfusion Medicine, Hannover Medical School, 30625 Hannover, Germany.
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Buczak AL, Koshute PT, Babin SM, Feighner BH, Lewis SH. A data-driven epidemiological prediction method for dengue outbreaks using local and remote sensing data. BMC Med Inform Decis Mak 2012; 12:124. [PMID: 23126401 PMCID: PMC3534444 DOI: 10.1186/1472-6947-12-124] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Accepted: 10/25/2012] [Indexed: 11/25/2022] Open
Abstract
Background Dengue is the most common arboviral disease of humans, with more than one third of the world’s population at risk. Accurate prediction of dengue outbreaks may lead to public health interventions that mitigate the effect of the disease. Predicting infectious disease outbreaks is a challenging task; truly predictive methods are still in their infancy. Methods We describe a novel prediction method utilizing Fuzzy Association Rule Mining to extract relationships between clinical, meteorological, climatic, and socio-political data from Peru. These relationships are in the form of rules. The best set of rules is automatically chosen and forms a classifier. That classifier is then used to predict future dengue incidence as either HIGH (outbreak) or LOW (no outbreak), where these values are defined as being above and below the mean previous dengue incidence plus two standard deviations, respectively. Results Our automated method built three different fuzzy association rule models. Using the first two weekly models, we predicted dengue incidence three and four weeks in advance, respectively. The third prediction encompassed a four-week period, specifically four to seven weeks from time of prediction. Using previously unused test data for the period 4–7 weeks from time of prediction yielded a positive predictive value of 0.686, a negative predictive value of 0.976, a sensitivity of 0.615, and a specificity of 0.982. Conclusions We have developed a novel approach for dengue outbreak prediction. The method is general, could be extended for use in any geographical region, and has the potential to be extended to other environmentally influenced infections. The variables used in our method are widely available for most, if not all countries, enhancing the generalizability of our method.
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Affiliation(s)
- Anna L Buczak
- Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723-6099, USA.
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Souza LJD, Boulos M. Clinical experience in dengue: experience of specialized service. Rev Inst Med Trop Sao Paulo 2012; 54 Suppl 18:S7-9. [PMID: 23011451 DOI: 10.1590/s0036-46652012000700004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Amorim JH, Pereira Bizerra RS, dos Santos Alves RP, Sbrogio-Almeida ME, Levi JE, Capurro ML, de Souza Ferreira LC. A genetic and pathologic study of a DENV2 clinical isolate capable of inducing encephalitis and hematological disturbances in immunocompetent mice. PLoS One 2012; 7:e44984. [PMID: 23028722 PMCID: PMC3441697 DOI: 10.1371/journal.pone.0044984] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 08/15/2012] [Indexed: 11/20/2022] Open
Abstract
Dengue virus (DENV) is the causative agent of dengue fever (DF), a mosquito-borne illness endemic to tropical and subtropical regions. There is currently no effective drug or vaccine formulation for the prevention of DF and its more severe forms, i.e., dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS). There are two generally available experimental models for the study of DENV pathogenicity as well as the evaluation of potential vaccine candidates. The first model consists of non-human primates, which do not develop symptoms but rather a transient viremia. Second, mouse-adapted virus strains or immunocompromised mouse lineages are utilized, which display some of the pathological features of the infection observed in humans but may not be relevant to the results with regard to the wild-type original virus strains or mouse lineages. In this study, we describe a genetic and pathological study of a DENV2 clinical isolate, named JHA1, which is naturally capable of infecting and killing Balb/c mice and reproduces some of the symptoms observed in DENV-infected subjects. Sequence analyses demonstrated that the JHA1 isolate belongs to the American genotype group and carries genetic markers previously associated with neurovirulence in mouse-adapted virus strains. The JHA1 strain was lethal to immunocompetent mice following intracranial (i.c.) inoculation with a LD50 of approximately 50 PFU. Mice infected with the JHA1 strain lost weight and exhibited general tissue damage and hematological disturbances, with similarity to those symptoms observed in infected humans. In addition, it was demonstrated that the JHA1 strain shares immunological determinants with the DENV2 NGC reference strain, as evaluated by cross-reactivity of anti-envelope glycoprotein (domain III) antibodies. The present results indicate that the JHA1 isolate may be a useful tool in the study of DENV pathogenicity and will help in the evaluation of anti-DENV vaccine formulations as well as potential therapeutic approaches.
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Affiliation(s)
- Jaime Henrique Amorim
- Vaccine Development Laboratory, Department of Microbiology, University of São Paulo, Brazil
| | | | - Rúbens Prince dos Santos Alves
- Vaccine Development Laboratory, Department of Microbiology, University of São Paulo, Brazil
- State University of Santa Cruz, Ilhéus, Brazil
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ANSTROM DAVIDM, ZHOU XIA, KALK CODYN, SONG BAOAN, LAN QUE. Mosquitocidal properties of natural product compounds isolated from Chinese herbs and synthetic analogs of curcumin. JOURNAL OF MEDICAL ENTOMOLOGY 2012; 49:350-355. [PMID: 22493854 PMCID: PMC3538819 DOI: 10.1603/me11117] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Because of resistance to current insecticides and to environmental, health, and regulatory concerns, naturally occurring compounds and their derivatives are of increasing interest for the development of new insecticidal compounds against vectors of disease-causing pathogens. Fifty-eight compounds, either extracted and purified from plants native to China or synthetic analogs of curcumin, were evaluated for both their larvicidal activity against Aedes aegypti (L.) and their ability to inhibit binding of cholesterol to Ae. aegypti sterol carrier protein-2 in vitro. Of the compounds tested, curcumin analogs seem especially promising in that of 24 compounds tested five were inhibitors of Ae. aegypti sterol carrier protein-2 with EC50 values ranging from 0.65 to 62.87 microM, and three curcumin analogs exhibited larvicidal activity against fourth instar Ae. aegypti larvae with LC50 values ranging from 17.29 to 27.90 microM. Adding to the attractiveness of synthetic curcumin analogs is the relative ease of synthesizing a large diversity of compounds; only a small fraction of such diversity has been sampled in this study.
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Affiliation(s)
- DAVID M. ANSTROM
- Department of Entomology, University of Wisconsin, 840 Russell Labs, 1630 Linden Drive, Madison, WI 53706
| | - XIA ZHOU
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People’s Republic of China
| | - CODY N. KALK
- Department of Entomology, University of Wisconsin, 840 Russell Labs, 1630 Linden Drive, Madison, WI 53706
| | - BAOAN SONG
- Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals, Guizhou University, Guiyang 550025, People’s Republic of China
| | - QUE LAN
- Department of Entomology, University of Wisconsin, 840 Russell Labs, 1630 Linden Drive, Madison, WI 53706
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Rodriguez-Roche R, Villegas E, Cook S, Poh Kim PAW, Hinojosa Y, Rosario D, Villalobos I, Bendezu H, Hibberd ML, Guzman MG. Population structure of the dengue viruses, Aragua, Venezuela, 2006-2007. Insights into dengue evolution under hyperendemic transmission. INFECTION GENETICS AND EVOLUTION 2011; 12:332-44. [PMID: 22197765 PMCID: PMC3919160 DOI: 10.1016/j.meegid.2011.12.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2011] [Revised: 12/08/2011] [Accepted: 12/10/2011] [Indexed: 12/16/2022]
Abstract
During the past three decades there has been a notable increase in dengue disease severity in Venezuela. Nevertheless, the population structure of the viruses being transmitted in this country is not well understood. Here, we present a molecular epidemiological study on dengue viruses (DENV) circulating in Aragua State, Venezuela during 2006-2007. Twenty-one DENV full-length genomes representing all of the four serotypes were amplified and sequenced directly from the serum samples. Notably, only DENV-2 was associated with severe disease. Phylogenetic trees constructed using Bayesian methods indicated that only one genotype was circulating for each serotype. However, extensive viral genetic diversity was found in DENV isolated from the same area during the same period, indicating significant in situ evolution since the introduction of these genotypes. Collectively, the results suggest that the non-structural (NS) proteins may play an important role in DENV evolution, particularly NS1, NS2A and NS4B proteins. The phylogenetic data provide evidence to suggest that multiple introductions of DENV have occurred from the Latin American region into Venezuela and vice versa. The implications of the significant viral genetic diversity generated during hyperendemic transmission, particularly in NS protein are discussed and considered in the context of future development and use of human monoclonal antibodies as antivirals and tetravalent vaccines.
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Mirzaian E, Durham MJ, Hess K, Goad JA. Mosquito-Borne Illnesses in Travelers: A Review of Risk and Prevention. Pharmacotherapy 2010; 30:1031-43. [DOI: 10.1592/phco.30.10.1031] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Tan GK, Ng JKW, Trasti SL, Schul W, Yip G, Alonso S. A non mouse-adapted dengue virus strain as a new model of severe dengue infection in AG129 mice. PLoS Negl Trop Dis 2010; 4:e672. [PMID: 20436920 PMCID: PMC2860513 DOI: 10.1371/journal.pntd.0000672] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2009] [Accepted: 03/18/2010] [Indexed: 11/18/2022] Open
Abstract
The spread of dengue (DEN) worldwide combined with an increased severity of the DEN-associated clinical outcomes have made this mosquito-borne virus of great global public health importance. Progress in understanding DEN pathogenesis and in developing effective treatments has been hampered by the lack of a suitable small animal model. Most of the DEN clinical isolates and cell culture-passaged DEN virus strains reported so far require either host adaptation, inoculation with a high dose and/or intravenous administration to elicit a virulent phenotype in mice which results, at best, in a productive infection with no, few, or irrelevant disease manifestations, and with mice dying within few days at the peak of viremia. Here we describe a non-mouse-adapted DEN2 virus strain (D2Y98P) that is highly infectious in AG129 mice (lacking interferon-α/β and -γ receptors) upon intraperitoneal administration. Infection with a high dose of D2Y98P induced cytokine storm, massive organ damage, and severe vascular leakage, leading to haemorrhage and rapid death of the animals at the peak of viremia. In contrast, very interestingly and uniquely, infection with a low dose of D2Y98P led to asymptomatic viral dissemination and replication in relevant organs, followed by non-paralytic death of the animals few days after virus clearance, similar to the disease kinetic in humans. Spleen damage, liver dysfunction and increased vascular permeability, but no haemorrhage, were observed in moribund animals, suggesting intact vascular integrity, a cardinal feature in DEN shock syndrome. Infection with D2Y98P thus offers the opportunity to further decipher some of the aspects of dengue pathogenesis and provides a new platform for drug and vaccine testing. The spread of dengue (DEN) worldwide combined with an increased severity of the DEN-associated clinical outcomes have made this mosquito-borne virus of great global public health importance. Infection with DEN virus can be asymptomatic or trigger a wide spectrum of clinical manifestations, ranging from mild acute febrile illness to classical dengue fever and to severe DEN hemorrhagic fever/DEN shock syndrome (DHF/DSS). Progress in understanding DEN disease and in developing effective treatments has been hampered by the lack of a suitable animal model that can reproduce all or part of the disease's clinical manifestations and outcome. Only a few of the DEN virus strains reported so far elicit a virulent phenotype in mice, which results at best in an acute infection where mice die within few days with no, few or irrelevant disease manifestations. Here we describe a DEN virus strain which is highly virulent in mice and reproduces some of the aspects of severe DEN in humans, including the disease kinetics, organ damage/dysfunction and increased vascular permeability. This DEN virus strain thus offers the opportunity to further decipher some of the mechanisms involved in DEN pathogenesis, and provides a new platform for drug and vaccine testing in the mouse model.
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Affiliation(s)
- Grace K. Tan
- Department of Microbiology, Immunology Programme, National University of Singapore, Singapore, Singapore
| | - Jowin K. W. Ng
- Department of Microbiology, Immunology Programme, National University of Singapore, Singapore, Singapore
| | - Scott L. Trasti
- Comparative Medicine Centre, National University of Singapore, Singapore, Singapore
| | - Wouter Schul
- Novartis Institute for Tropical Diseases (NITD), Singapore, Singapore
| | - George Yip
- Department of Anatomy, National University of Singapore, Singapore, Singapore
| | - Sylvie Alonso
- Department of Microbiology, Immunology Programme, National University of Singapore, Singapore, Singapore
- * E-mail:
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Guhl S, Franke R, Schielke A, Johne R, Krüger DH, Babina M, Rang A. Infection of in vivo differentiated human mast cells with hantaviruses. J Gen Virol 2010; 91:1256-61. [PMID: 20071485 DOI: 10.1099/vir.0.019505-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Increased vascular permeability is a key feature of the pathological symptoms caused by hantaviruses. Here, we analysed the interaction between hantaviruses and mast cells, which regulate vascular homeostasis. In highly purified human skin mast cells increasing amounts of Hantaan (HTNV) and, to a lower extent, Prospect Hill (PHV) virions were produced. Replication was confirmed by the production of viral plus-strand RNA as determined by a virus strand-specific RT-PCR. PHV but not HTNV elicited early expression of beta interferon, MxA, ISG15 and CCL5 consistent to studies with other cell types. The data demonstrate that mature mast cells are permissive to infection with hantaviruses. This interaction might contribute to the development of vascular leakage syndrome.
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Affiliation(s)
- Sven Guhl
- Department of Dermatology and Allergy, University Hospital Charité, D-10098 Berlin, Germany
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Nascimento EJM, Braga-Neto U, Calzavara-Silva CE, Gomes ALV, Abath FGC, Brito CAA, Cordeiro MT, Silva AM, Magalhães C, Andrade R, Gil LHVG, Marques ETA. Gene expression profiling during early acute febrile stage of dengue infection can predict the disease outcome. PLoS One 2009; 4:e7892. [PMID: 19936257 PMCID: PMC2775946 DOI: 10.1371/journal.pone.0007892] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2009] [Accepted: 10/22/2009] [Indexed: 12/24/2022] Open
Abstract
Background We report the detailed development of biomarkers to predict the clinical outcome under dengue infection. Transcriptional signatures from purified peripheral blood mononuclear cells were derived from whole-genome gene-expression microarray data, validated by quantitative PCR and tested in independent samples. Methodology/Principal Findings The study was performed on patients of a well-characterized dengue cohort from Recife, Brazil. The samples analyzed were collected prospectively from acute febrile dengue patients who evolved with different degrees of disease severity: classic dengue fever or dengue hemorrhagic fever (DHF) samples were compared with similar samples from other non-dengue febrile illnesses. The DHF samples were collected 2–3 days before the presentation of the plasma leakage symptoms. Differentially-expressed genes were selected by univariate statistical tests as well as multivariate classification techniques. The results showed that at early stages of dengue infection, the genes involved in effector mechanisms of innate immune response presented a weaker activation on patients who later developed hemorrhagic fever, whereas the genes involved in apoptosis were expressed in higher levels. Conclusions/Significance Some of the gene expression signatures displayed estimated accuracy rates of more than 95%, indicating that expression profiling with these signatures may provide a useful means of DHF prognosis at early stages of infection.
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Affiliation(s)
- Eduardo J. M. Nascimento
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
- Department of Medicine, Division of Infectious Disease, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Ulisses Braga-Neto
- Department of Electrical Engineering, Texas A&M University College Station, Texas, United States of America
| | - Carlos E. Calzavara-Silva
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
| | - Ana L. V. Gomes
- Departamento de Imunologia do Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
| | - Frederico G. C. Abath
- Departamento de Imunologia do Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
| | - Carlos A. A. Brito
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
- Departamento de Medicina Clínica, Universidade Federal de Pernambuco, Recife, Pernambuco, Brazil
- Hospital Esperança, Recife, Pernambuco, Brazil
| | - Marli T. Cordeiro
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
- Laboratório Central de Saúde Pública, Secretaria de Saúde do Estado de Pernambuco, Recife, Pernambuco, Brazil
| | - Ana M. Silva
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
| | - Cecilia Magalhães
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
| | - Raoni Andrade
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
| | - Laura H. V. G. Gil
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
| | - Ernesto T. A. Marques
- Departamento de Virologia e Terapia Experimental, Centro de Pesquisas Aggeu Magalhães-CPqAM/FIOCRUZ, Recife, Pernambuco, Brazil
- Department of Medicine, Division of Infectious Disease, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Pharmacology and Molecular Sciences, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Infectious Diseases and Microbiology, University of Pittsburgh, Pittsburgh, Pennsylvania, United States of America
- * E-mail:
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