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https://www.readbyqxmd.com/read/28088588/dengue-infection-in-pregnancy-and-its-impact-on-the-placenta
#1
Christiane Fernandes Ribeiro, Vânia Glória Silami Lopes, Patrícia Brasil, Andrea Rodrigues Cordovil Pires, Roger Rohloff, Rita Maria Ribeiro Nogueira
A histopathological and immunohistochemical study was conducted in placental tissues and retained products of conception from 24 patients with confirmed dengue infection during pregnancy. The immunohistochemical assay was positive for dengue virus in 19 placental and three ovular remnants analyzed. The light microscopic findings were signs of hypoxia, choriodeciduitis, deciduitis and intervillositis and the viral antigens were found in cytoplasmic of the trophoblast, villous stroma and decidua.Our results suggest that immunohistochemistry could be used as a laboratory confirmation method for dengue in pregnant women, especially in endemic areas when embedded material is the only material available...
January 11, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28087275/sequence-structure-and-function-relationships-in-flaviviruses-as-assessed-by-evolutive-aspects-of-its-conserved-non-structural-protein-domains
#2
Néli José da Fonseca, Marcelo Querino Lima Afonso, Natan Gonçalves Pedersolli, Lucas Carrijo de Oliveira, Dhiego Souto Andrade, Lucas Bleicher
Flaviviruses are responsible for serious diseases such as dengue, yellow fever, and zika fever. Their genomes encode a polyprotein which, after cleavage, results in three structural and seven non-structural proteins. Homologous proteins can be studied by conservation and coevolution analysis as detected in multiple sequence alignments, usually reporting positions which are strictly necessary for the structure and/or function of all members in a protein family or which are involved in a specific sub-class feature requiring the coevolution of residue sets...
January 10, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28081143/engineered-aedes-aegypti-jak-stat-pathway-mediated-immunity-to-dengue-virus
#3
Natapong Jupatanakul, Shuzhen Sim, Yesseinia I Angleró-Rodríguez, Jayme Souza-Neto, Suchismita Das, Kristin E Poti, Shannan L Rossi, Nicholas Bergren, Nikos Vasilakis, George Dimopoulos
We have developed genetically modified Ae. aegypti mosquitoes that activate the conserved antiviral JAK/STAT pathway in the fat body tissue, by overexpressing either the receptor Dome or the Janus kinase Hop by the blood feeding-induced vitellogenin (Vg) promoter. Transgene expression inhibits infection with several dengue virus (DENV) serotypes in the midgut as well as systemically and in the salivary glands. The impact of the transgenes Dome and Hop on mosquito longevity was minimal, but it resulted in a compromised fecundity when compared to wild-type mosquitoes...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28080959/sentinel-surveillance-of-imported-dengue-via-travellers-to-europe-2012-to-2014-tropnet-data-from-the-denguetools-research-initiative
#4
Andreas Neumayr, Jose Muñoz, Mirjam Schunk, Emmanuel Bottieau, Jakob Cramer, Guido Calleri, Rogelio López-Vélez, Andrea Angheben, Thomas Zoller, Leo Visser, Núria Serre-Delcor, Blaise Genton, Francesco Castelli, Marjan Van Esbroeck, Alberto Matteelli, Laurence Rochat, Elena Sulleiro, Florian Kurth, Federico Gobbi, Francesca Norman, Ilaria Torta, Jan Clerinx, David Poluda, Miguel Martinez, Antonia Calvo-Cano, Maria Paz Sanchez-Seco, Annelies Wilder-Smith, Christoph Hatz, Leticia Franco
We describe the epidemiological pattern and genetic characteristics of 242 acute dengue infections imported to Europe by returning travellers from 2012 to 2014. The overall geographical pattern of imported dengue (South-east Asia > Americas > western Pacific region > Africa) remained stable compared with 1999 to 2010. We isolated the majority of dengue virus genotypes and epidemic lineages causing outbreaks and epidemics in Asia, America and Africa during the study period. Travellers acted as sentinels for four unusual dengue outbreaks (Madeira, 2012-13; Luanda, 2013; Dar es Salaam, 2014; Tokyo, 2014)...
January 5, 2017: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
https://www.readbyqxmd.com/read/28078104/discovery-of-flavivirus-derived-endogenous-viral-elements-in-anopheles-mosquito-genomes-supports-the-existence-of-anopheles-associated-insect-specific-flaviviruses
#5
Sebastian Lequime, Louis Lambrechts
The Flavivirus genus encompasses several arboviruses of public health significance such as dengue, yellow fever, and Zika viruses. It also includes insect-specific flaviviruses (ISFs) that are only capable of infecting insect hosts. The vast majority of mosquito-infecting flaviviruses have been associated with mosquito species of the Aedes and Culex genera in the Culicinae subfamily, which also includes most arbovirus vectors. Mosquitoes of the Anophelinae subfamily are not considered significant arbovirus vectors; however, flaviviruses have occasionally been detected in field-caught Anopheles specimens...
January 2017: Virus Evolution
https://www.readbyqxmd.com/read/28077582/severity-of-plasma-leakage-is-associated-with-high-levels-of-interferon-%C3%AE-inducible-protein-10-hepatocyte-growth-factor-matrix-metalloproteinase-2-mmp-2-and-mmp-9-during-dengue-virus-infection
#6
Zhisheng Her, Yiu-Wing Kam, Victor C Gan, Bernett Lee, Tun-Linn Thein, Jeslin J L Tan, Linda K Lee, Katja Fink, David C Lye, Laurent Rénia, Yee-Sin Leo, Lisa F P Ng
BACKGROUND:  Dengue virus infection typically causes mild dengue fever, but, in severe cases, life-threatening dengue hemorrhagic fever (DHF) and dengue shock syndrome (DSS) occur. The pathophysiological hallmark of DHF and DSS is plasma leakage that leads to enhanced vascular permeability, likely due to a cytokine storm. METHODS:  Ninety patients with dengue during 2010-2012 in Singapore were prospectively recruited and stratified according to their disease phase, primary and secondary infection status, and disease severity, measured by plasma leakage...
January 1, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28077444/protein-interactions-during-the-flavivirus-and-hepacivirus-life-cycle
#7
Gisa Gerold, Janina Bruening, Bettina Weigel, Thomas Pietschmann
Protein-protein interactions govern biological functions in cells, in the extracellular milieu and at the border between cells and extracellular space. Viruses are small intracellular parasites and thus rely on protein interactions to produce progeny inside host cells and to spread from cell to cell. Usage of host proteins by viruses can have severe consequences e.g. apoptosis, metabolic disequilibria or altered cell proliferation and mobility. Understanding protein interactions during virus infection can thus educate us on viral infection and pathogenesis mechanisms...
January 11, 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28076301/clinical-use-of-targeted-high-throughput-whole-genome-sequencing-for-a-dengue-virus-variant
#8
Chun Kiat Lee, Cui Wen Chua, Lily Chiu, Evelyn Siew-Chuan Koay
No abstract text is available yet for this article.
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28074128/epidemic-outbreak-of-chikungunya-in-two-neighboring-towns-in-the-colombian-caribbean-a-survival-analysis
#9
Misael Oviedo-Pastrana, Nelson Méndez, Salim Mattar, Germán Arrieta, Luty Gomezcaceres
BACKGROUND: The first autochthonous Chikungunya virus transmission in Colombia was reported in September 2014. Three months later, every town in the Caribbean region was affected, including the bordering towns of Ovejas and Corozal, in the department of Sucre. The objective of the study was to analyze and compare the temporal dynamics of the outbreak of Chikungunya in two towns of the department of Sucre. METHODS: Households with suspicious cases with clinical symptomatology for Chikungunya were enrolled...
2017: Archives of Public Health, Archives Belges de Santé Publique
https://www.readbyqxmd.com/read/28074025/flavivirus-infection-uncouples-translation-suppression-from-cellular-stress-responses
#10
Hanna Roth, Vera Magg, Fabian Uch, Pascal Mutz, Philipp Klein, Katharina Haneke, Volker Lohmann, Ralf Bartenschlager, Oliver T Fackler, Nicolas Locker, Georg Stoecklin, Alessia Ruggieri
: As obligate parasites, viruses strictly depend on host cell translation for the production of new progeny, yet infected cells also synthesize antiviral proteins to limit virus infection. Modulation of host cell translation therefore represents a frequent strategy by which viruses optimize their replication and spread. Here we sought to define how host cell translation is regulated during infection of human cells with dengue virus (DENV) and Zika virus (ZIKV), two positive-strand RNA flaviviruses...
January 10, 2017: MBio
https://www.readbyqxmd.com/read/28073742/genomics-proteomics-and-evolution-of-dengue-virus
#11
REVIEW
Vivek Dhar Dwivedi, Indra Prasad Tripathi, Ramesh Chandra Tripathi, Shiv Bharadwaj, Sarad Kumar Mishra
The genome of a pathogenic organism possesses a specific order of nucleotides that contains not only information about the synthesis and expression of proteomes, which are required for its growth and survival, but also about its evolution. Inhibition of any particular protein, which is required for the survival of that pathogenic organism, can be used as a potential therapeutic target for the development of effective drugs to treat its infections. In this review, the genomics, proteomics and evolution of dengue virus have been discussed, which will be helpful in better understanding of its origin, growth, survival and evolution, and may contribute toward development of new efficient anti-dengue drugs...
January 10, 2017: Briefings in Functional Genomics
https://www.readbyqxmd.com/read/28072887/dengue-fever-in-travellers-and-risk-of-local-spreading-case-reports-from-southern-italy-and-literature-update
#12
Claudia Fabrizio, Luciana Lepore, Maria Chironna, Gioacchino Angarano, Annalisa Saracino
Dengue fever (DF), an arbovirosis caused by Dengue viruses (DV, serotypes 1-4), is responsible for an increasing number of travel-related acute febrile illnesses due to population growth, climate changes, spreading by viremic travellers, and improved laboratory diagnosis. The presence of efficient vectors (mosquito Aedes albopictus) has also been described in temperate regions including Italy which is considered the most heavily infected European country. Normally characterized by non-specific signs and symptoms, DF incidence is probably underestimated, especially in non-endemic countries, but the risk of severe forms is substantial...
January 5, 2017: New Microbiologica
https://www.readbyqxmd.com/read/28071683/a-comparative-analysis-of-three-vector-borne-diseases-across-australia-using-seasonal-and-meteorological-models
#13
Margaret D Stratton, Hanna Y Ehrlich, Siobhan M Mor, Elena N Naumova
Ross River virus (RRV), Barmah Forest virus (BFV), and dengue are three common mosquito-borne diseases in Australia that display notable seasonal patterns. Although all three diseases have been modeled on localized scales, no previous study has used harmonic models to compare seasonality of mosquito-borne diseases on a continent-wide scale. We fit Poisson harmonic regression models to surveillance data on RRV, BFV, and dengue (from 1993, 1995 and 1991, respectively, through 2015) incorporating seasonal, trend, and climate (temperature and rainfall) parameters...
January 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28069378/role-of-n-glycosylation-on-zika-virus-e-protein-secretion-viral-assembly-and-infectivity
#14
M Mossenta, S Marchese, M Poggianella, J L Slon Campos, O R Burrone
Zika virus has rapidly spread reaching a global distribution pattern similar to that of dengue virus, and has been associated with serious neurological and developmental pathologies, like congenital malformation during pregnancy and Guillain-Barré syndrome. Sequence analysis of different clinical and laboratory isolates has shown the existence of mutants with loss of the conserved N-glycosylation motif on domain I of protein E that is common to all flaviviruses. We found that loss of E N-linked glycosylation leads to compromised expression and secretion of E ectodomain from mammalian cells...
January 6, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28069071/sporadic-cases-of-adult-measles-a-research-article
#15
Ranjan Premaratna, Nathasha Luke, Harsha Perera, Mahesh Gunathilake, Pubudu Amarasena, T G A Nilmini Chandrasena
BACKGROUND: Measles caused by a paramyxovirus, characterized by fever, malaise, cough, coryza conjunctivitis, a maculopapular rash is known to result in pneumonia, encephalitis and death. Fatal cases of measles in Sri Lanka are rare after implementation of the National Immunization Programme in 1984. Thereafter 0.1% case fatality rate was observed during October 1999-June 2000 which is a very low figure compared to other regional countries. Immunization guidelines were further revised in 2001, 2011 and in 2012 when additional immunization was recommended to age group 4-21 years; who are likely to have inadequate immunization, in order to achieve elimination of Measles by 2020...
January 10, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28068335/dengue-in-latin-america-systematic-review-of-molecular-epidemiological-trends
#16
José Ramos-Castañeda, Flavia Barreto Dos Santos, Ruth Martínez-Vega, Josélio Maria Galvão de Araujo, Graham Joint, Elsa Sarti
Dengue, the predominant arthropod-borne viral disease affecting humans, is caused by one of four distinct serotypes (DENV-1, -2, -3 or -4). A literature analysis and review was undertaken to describe the molecular epidemiological trends in dengue disease and the knowledge generated in specific molecular topics in Latin America, including the Caribbean islands, from 2000 to 2013 in the context of regional trends in order to identify gaps in molecular epidemiological knowledge and future research needs. Searches of literature published between 1 January 2000 and 30 November 2013 were conducted using specific search strategies for each electronic database that was reviewed...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28065855/tyrosine-kinase-phosphatase-inhibitors-decrease-dengue-virus-production-in-hepg2-cells
#17
Thawornchai Limjindaporn, Jutatip Panaampon, Shilu Malakar, Sansanee Noisakran, Pathai Yenchitsomanus
Dengue virus is the causative agent of dengue fever, dengue hemorrhagic fever, and dengue shock syndrome. High rates of dengue virus replication and virion production are related to disease severity. To identify anti-DENV compounds, we performed cell-based ELISA testing to detect the level of DENV E protein expression. Among a total of 83 inhibitors, eight were identified as inhibitors with antiviral activity. Epidermal growth factor receptor inhibitor II (EGFR/ErbB-2/ErbB-4 inhibitor II) and protein tyrosine phosphatase inhibitor IV (PTP inhibitor IV) significantly inhibited dengue virus production and demonstrated low toxicity in hepatocyte cell lines...
January 5, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28062188/a-comprehensive-analysis-and-immunobiology-of-autoimmune-neurological-syndromes-during-the-zika-virus-outbreak-in-c%C3%A3%C2%BAcuta-colombia
#18
Juan-Manuel Anaya, Yhojan Rodríguez, Diana M Monsalve, Daniel Vega, Ernesto Ojeda, Diana González-Bravo, Mónica Rodríguez-Jiménez, Carlos A Pinto-Díaz, Pablo Chaparro, María L Gunturiz, Aftab A Ansari, M Eric Gershwin, Nicolás Molano-González, Carolina Ramírez-Santana, Yeny Acosta-Ampudia
We have focused on the epidemiology and immunobiology of Zika virus (ZIKV) infection and factors associated with the development of Guillain-Barré syndrome (GBS) and other neurological syndromes in Cúcuta, the capital of North Santander department, Colombia. Data of patients with ZIKV disease reported to the national population-based surveillance system were used to calculate the basic reproduction number (R0) and the attack rates (ARs) as well as to develop epidemiological maps. Patients with neurological syndromes were contacted and their diagnoses were confirmed...
January 3, 2017: Journal of Autoimmunity
https://www.readbyqxmd.com/read/28061906/bilateral-rectus-sheath-haematoma-complicating-dengue-virus-infection-in-a-patient-on-warfarin-for-mechanical-aortic-valve-replacement-a-case-report
#19
Chamith Thushanga Rosa, Mitrakrishnan Rayno Navinan, Sincy Samarawickrama, Himam Hamza, Maheshika Gunarathne, Arulprashanth Arulanantham, Neeha Subba, Udari Samarasiri, Thushara Mathias, Aruna Kulatunga
BACKGROUND: The management of Dengue virus infection can be challenging. Varied presentations and numerous complications intrinsic to dengue by itself increase the complexity of treatment and potential mortality. When burdened with the presence of additional comorbidities and the need to continue compulsory medications, clear stepwise definitive guidance is lacking and patients tend to have more complex complications and outcomes calling to question the clinical decisions that may have been taken...
January 7, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28060934/a-cohort-study-of-adult-patients-with-severe-dengue-in-taiwanese-intensive-care-units-the-elderly-and-aptt-prolongation-matter-for-prognosis
#20
Chih-Cheng Hsieh, Cong-Tat Cia, Jen-Chieh Lee, Junne-Ming Sung, Nan-Yao Lee, Po-Lin Chen, Te-Hui Kuo, Jo-Yen Chao, Wen-Chien Ko
BACKGROUND: There was a large dengue outbreak in Taiwan in 2015, in which the ages of the affected individuals were higher than those in other countries. The aim of this study was to explore the characteristics and prognostic factors for adults with severe dengue in intensive care units (ICUs). METHODS: All adults admitted to ICUs with dengue virus infection (DENV) at a medical center from July 1, 2015 to December 31, 2015 were enrolled. DENV was diagnosed by the presence of serum NS1 antigen, IgM antibodies to dengue virus, or dengue virus RNA by real-time reverse transcriptase polymerase chain reaction...
January 6, 2017: PLoS Neglected Tropical Diseases
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