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https://www.readbyqxmd.com/read/28916758/role-of-the-venus-kinase-receptor-in-the-female-reproductive-physiology-of-the-desert-locust-schistocerca-gregaria
#1
Cynthia Lenaerts, Jolien Palmans, Elisabeth Marchal, Rik Verdonck, Jozef Vanden Broeck
Venus kinase receptors (VKR) are a subfamily of invertebrate receptor tyrosine kinases, which have only recently been discovered. They contain an intracellular tyrosine kinase domain and an extracellular Venus FlyTrap domain. VKRs have been functionally and pharmacologically characterized in only two invertebrate species, namely the human parasite Schistosoma mansoni and the mosquito Aedes aegypti, where they play a crucial role in oogenesis. Here, we report the characterization of a VKR in the desert locust, Schistocerca gregaria...
September 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28915398/masculinization-and-reproductive-effects-in-western-mosquitofish-gambusia-affinis-after-long-term-exposure-to-androstenedione
#2
Li-Ping Hou, Yang Yang, Hu Shu, Guang-Guo Ying, Jian-Liang Zhao, Gui-Zhen Fang, Li Xin, Wen-Jun Shi, Li Yao, Xue-Mei Cheng
Androstenedione (AED) is a naturally occurring steroid hormone. It is metabolized to potent androgens, which may induce androgenic effects in fish. However, little is known whether and how the androgens interfere with the fish gonadal development and reproduction. This study aimed at demonstrating the effects of long-term AED exposure on reproduction and development in mosquitofish (Gambusia affinis). The growth, development and several morphological endpoints, including the segment number and length of anal fin, histological changes of gonads and liver, were evaluated in mosquitofish during development from fertilized embryo to adulthood (180 days) after exposure of AED at environmentally relevant concentrations...
September 12, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28912773/hirsutine-an-indole-alkaloid-of-uncaria-rhynchophylla-inhibits-late-step-in-dengue-virus-lifecycle
#3
Takayuki Hishiki, Fumihiro Kato, Shigeru Tajima, Kazufumi Toume, Masahito Umezaki, Tomohiko Takasaki, Tomoyuki Miura
Dengue virus (DENV) is transmitted to humans by Aedes mosquitoes and is a public health issue worldwide. No antiviral drugs specific for treating dengue infection are currently available. To identify novel DENV inhibitors, we analyzed a library of 95 compounds and 120 extracts derived from crude drugs (herbal medicines). In the primary screening, A549 cells infected with DENV-1 were cultured in the presence of each compound and extract at a final concentration of 10 μM (compound) and 100 μg/mL (extract), and reduction of viral focus formation was assessed...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28911514/defibrillation-for-ventricular-fibrillation-a-shocking-update
#4
REVIEW
Graham Nichol, Michael R Sayre, Federico Guerra, Jeanne Poole
Cardiac arrest is defined as the termination of cardiac activity associated with loss of consciousness, of spontaneous breathing, and of circulation. Sudden cardiac arrest and sudden cardiac death (SCD) are terms often used interchangeably. Most patients with out-of-hospital cardiac arrest have shown coronary artery disease or symptoms during the hour before the event. Cardiac arrest is potentially reversible by cardiopulmonary resuscitation, defibrillation, cardioversion, cardiac pacing, or treatments targeted at the underlying disease (e...
September 19, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28910810/concurrent-infection-with-plasmodium-vivax-and-the-dengue-and-chikungunya-viruses-in-a-paediatric-patient-from-new-delhi-india-in-2016
#5
Ayesha Tazeen, Mohd Abdullah, Malik Hisamuddin, Sher Ali, Irshad H Naqvi, Hirday N Verma, Anwar Ahmed, Shama Parveen
Dengue and chikungunya fevers are transmitted by the common mosquito vector Aedes and malaria by Anopheles. Concurrent infections are reported due to co-circulation of these pathogens, especially in endemic regions. We report a rare case of triple infection with 3 arthropod-borne pathogens (Plasmodium vivax and the dengue and chikungunya viruses) in a 3-year-old child from New Delhi, India, in August 2016. The viruses were identified by RT-PCR and the parasite by microscopy and antigen detection. The dengue virus serotype 3 sequence was clustered in the genotype III by the phylogenetic analysis...
September 15, 2017: Intervirology
https://www.readbyqxmd.com/read/28904344/perturbed-cholesterol-and-vesicular-trafficking-associated-with-dengue-blocking-in-wolbachia-infected-aedes-aegypti-cells
#6
Vincent Geoghegan, Kirsty Stainton, Stephanie M Rainey, Thomas H Ant, Adam A Dowle, Tony Larson, Svenja Hester, Philip D Charles, Benjamin Thomas, Steven P Sinkins
Wolbachia are intracellular maternally inherited bacteria that can spread through insect populations and block virus transmission by mosquitoes, providing an important approach to dengue control. To better understand the mechanisms of virus inhibition, we here perform proteomic quantification of the effects of Wolbachia in Aedes aegypti mosquito cells and midgut. Perturbations are observed in vesicular trafficking, lipid metabolism and in the endoplasmic reticulum that could impact viral entry and replication...
September 13, 2017: Nature Communications
https://www.readbyqxmd.com/read/28903056/quality-of-bystander-cardiopulmonary-resuscitation-during-real-life-out-of-hospital-cardiac-arrest
#7
Tore Gyllenborg, Asger Granfeldt, Freddy Lippert, Ingunn Skogstad Riddervold, Fredrik Folke
BACKGROUND: Cardiopulmonary resuscitation (CPR) can increase survival in out-of-hospital cardiac arrest (OHCA). However, little is known about bystander CPR quality in real-life OHCA. AIM: To describe bystander CPR quality based on automated external defibrillator (AED) CPR process data during OHCA and compare it with the European Resuscitation Council 2010 and 2015 Guidelines. METHODS: We included OHCA cases from the Capital Region, Denmark, (2012-2016) where a Zoll AED was used before ambulance arrival...
September 10, 2017: Resuscitation
https://www.readbyqxmd.com/read/28902912/differential-response-to-mosquito-host-sex-and-parasite-dosage-suggest-mixed-dispersal-strategies-in-the-parasite-ascogregarina-taiwanensis
#8
John Soghigian, Todd Livdahl
Mixed dispersal strategies are a form of bet hedging in which a species or population utilizes different dispersal strategies dependent upon biotic or abiotic conditions. Here we provide an example of a mixed dispersal strategy in the Aedes albopictus / Ascogregarina taiwanensis host/parasite system, wherein upon host emergence, the gregarine parasite is either carried with an adult mosquito leaving the larval habitat, or released back into the larval habitat. We show that the parasite invests a larger proportion of its dispersing (oocyst) life stage into adult female mosquitoes as opposed to adult male mosquitoes at low parasite exposure levels...
2017: PloS One
https://www.readbyqxmd.com/read/28902278/minimum-infectious-dose-for-chikungunya-virus-in-aedes-aegypti-and-ae-albopictus-mosquitoes
#9
Jeremy P Ledermann, Erin M Borland, Ann M Powers
Understanding the ability of the chikungunya virus (CHIKV) to be transmitted by Aedes vectors in the Americas is critical for assessing epidemiological risk. One element that must be considered is the minimum infectious dose of virus that can lead to transmission following the extrinsic incubation period. This study aimed to determine the minimum infection rate for the two Aedes species studied. The results revealed that doses as low as 3.9 log10 plaque-forming units per mL (pfu/mL) of an Asian genotype CHIKV strain can lead to transmission by Ae...
August 21, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28902276/first-detection-of-dengue-and-chikungunya-viruses-in-natural-populations-of-aedes-aegypti-in-martinique-during-the-2013-2015-concomitant-outbreak
#10
Laurence Farraudière, Fabrice Sonor, Said Crico, Manuel Étienne, Laurence Mousson, Rodolphe Hamel, Dorothée Missé, Anna-Bella Failloux, Frédéric Simard, André Yébakima
Dengue and chikungunya viruses are transmitted by Aedes mosquitoes. In Martinique, an island of the French West Indies, Aedes aegypti is the suspected vector of both arboviruses; there is no Aedes albopictus on the island. During the concomitant outbreak of 2013 - 2015, the authors collected wild A. aegypti populations, and for the first time, detected dengue and chikungunya viruses in field-collected females. This paper demonstrates the mosquito's role in transmission of both dengue and chikungunya on the island, and also highlights a tool that public health authorities can use for preventing outbreaks...
August 21, 2017: Revista Panamericana de Salud Pública, Pan American Journal of Public Health
https://www.readbyqxmd.com/read/28901546/return-of-spontaneous-circulation-and-long-term-survival-according-to-feedback-provided-by-automated-external-defibrillators
#11
M Agerskov, M B Hansen, A M Nielsen, T P Møller, M Wissenberg, L S Rasmussen
BACKGROUND: We aimed to investigate the effect of automated external defibrillator (AED) feedback mechanisms on survival in out-of-hospital cardiac arrest (OHCA) victims. In addition, we investigated converting rates in patients with shockable rhythms according to AED shock waveforms and energy levels. METHODS: We collected data on OHCA occurring between 2011 and 2014 in the Capital Region of Denmark where an AED was applied prior to ambulance arrival. Patient data were obtained from the Danish Cardiac Arrest Registry and medical records...
September 13, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28901536/validation-of-the-pedsql-epilepsy-module-a-pediatric-epilepsy-specific-health-related-quality-of-life-measure
#12
Avani C Modi, Katherine F Junger, Constance A Mara, Tanja Kellermann, Lauren Barrett, Janelle Wagner, Grace A Mucci, Laurie Bailey, Dace Almane, Shanna M Guilfoyle, Lauryn Urso, Brooke Hater, Heather Hustzi, Gigi Smith, Bruce Herrmann, M Scott Perry, Mary Zupanc, James W Varni
OBJECTIVE: To validate a brief and reliable epilepsy-specific, health-related quality of life (HRQOL) measure in children with various seizure types, treatments, and demographic characteristics. METHODS: This national validation study was conducted across five epilepsy centers in the United States. Youth 5-18 years and caregivers of youth 2-18 years diagnosed with epilepsy completed the PedsQL Epilepsy Module and additional questionnaires to establish reliability and validity of the epilepsy-specific HRQOL instrument...
September 13, 2017: Epilepsia
https://www.readbyqxmd.com/read/28900215/highly-effective-broad-spectrum-chimeric-larvicide-that-targets-vector-mosquitoes-using-a-lipophilic-protein
#13
Dennis K Bideshi, Hyun-Woo Park, Robert H Hice, Margaret C Wirth, Brian A Federici
Two mosquitocidal bacteria, Bacillus thuringiensis subsp. israelensis (Bti) and Lysinibacillus sphaericus (Ls) are the active ingredients of commercial larvicides used widely to control vector mosquitoes. Bti's efficacy is due to synergistic interactions among four proteins, Cry4Aa, Cry4Ba, Cry11Aa, and Cyt1Aa, whereas Ls's activity is caused by Bin, a heterodimer consisting of BinA, the toxin, and BinB, a midgut-binding protein. Cyt1Aa is lipophilic and synergizes Bti Cry proteins by increasing midgut binding...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28898286/structural-investigation-of-c6-36-and-vero-cell-cultures-infected-with-a-brazilian-zika-virus
#14
Debora Ferreira Barreto-Vieira, Fernanda Cunha Jácome, Marcos Alexandre Nunes da Silva, Gabriela Cardoso Caldas, Ana Maria Bispo de Filippis, Patrícia Carvalho de Sequeira, Elen Mello de Souza, Audrien Alves Andrade, Pedro Paulo de Abreu Manso, Gisela Freitas Trindade, Sheila Maria Barbosa Lima, Ortrud Monika Barth
Zika virus (ZIKV) is a member of the flavivirus genus, and its genome is approximately 10.8 kilobases of positive-strand RNA enclosed in a capsid and surrounded by a membrane. Studies on the replication dynamics of ZIKV are scarce, which limits the development of antiviral agents and vaccines directed against ZIKV. In this study, Aedes albopictus mosquito lineage cells (C6/36 cells) and African green monkey kidney epithelial cells (Vero cells) were inoculated with a ZIKV sample isolated from a Brazilian patient, and the infection was characterized by immunofluorescence staining, phase contrast light microscopy, transmission electron microscopy and real-time RT-PCR...
2017: PloS One
https://www.readbyqxmd.com/read/28894749/efficacy-of-blood-sources-and-artificial-blood-feeding-methods-in-rearing-of-aedes-aegypti-diptera-culicidae-for-sterile-insect-technique-and-incompatible-insect-technique-approaches-in-sri-lanka
#15
Nayana Gunathilaka, Tharaka Ranathunge, Lahiru Udayanga, Wimaladharma Abeyewickreme
INTRODUCTION: Selection of the artificial membrane feeding technique and blood meal source has been recognized as key considerations in mass rearing of vectors. METHODOLOGY: Artificial membrane feeding techniques, namely, glass plate, metal plate, and Hemotek membrane feeding method, and three blood sources (human, cattle, and chicken) were evaluated based on feeding rates, fecundity, and hatching rates of Aedes aegypti. Significance in the variations among blood feeding was investigated by one-way ANOVA, cluster analysis of variance (ANOSIM), and principal coordinates (PCO) analysis...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28892499/effectiveness-and-economic-assessment-of-routine-larviciding-for-prevention-of-chikungunya-and-dengue-in-temperate-urban-settings-in-europe
#16
Giorgio Guzzetta, Filippo Trentini, Piero Poletti, Frederic Alexandre Baldacchino, Fabrizio Montarsi, Gioia Capelli, Annapaola Rizzoli, Roberto Rosà, Stefano Merler, Alessia Melegaro
In the last decades, several European countries where arboviral infections are not endemic have faced outbreaks of diseases such as chikungunya and dengue, initially introduced by infectious travellers from tropical endemic areas and then spread locally via mosquito bites. To keep in check the epidemiological risk, interventions targeted to control vector abundance can be implemented by local authorities. We assessed the epidemiological effectiveness and economic costs and benefits of routine larviciding in European towns with temperate climate, using a mathematical model of Aedes albopictus populations and viral transmission, calibrated on entomological surveillance data collected from ten municipalities in Northern Italy during 2014 and 2015...
September 11, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28892483/quality-control-methods-for-aedes-albopictus-sterile-male-production
#17
Fabrizio Balestrino, Arianna Puggioli, Marco Carrieri, Jérémy Bouyer, Romeo Bellini
The capacity of the released sterile males to survive, disperse, compete with wild males and inseminate wild females is an essential prerequisite to be evaluated in any area-wide integrated pest management (AW-IPM) programs including a sterile insect release method. Adequate quality control tests supported by standardized procedures need to be developed to measure these parameters and to identify and correct potential inappropriate rearing or handling methods affecting the overall male quality. In this study, we report results on the creation and validation of the first quality control devices designed to infer the survival and mating capacity of radio-sterilized Aedes albopictus males through the observation of their flight capacity under restricted conditions (flight organ device) and after stress treatment (aspirator device)...
September 11, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28891449/role-of-pharmacogenomics-in-antiepileptic-drug-therapy-current-status-and-future-perspectives
#18
Antonio Gambardella, Angelo Labate, Laura Mumoli, Iscia Lopes-Cendes, Fernando Cendes
BACKGROUND: Growing evidence indicates that pharmacogenomics will positively impact treatment for patients with epilepsy in the near future, leading to the implementation of a precision-based use of antiepileptic drug (AED) therapy, thereby providing a cornerstone for precision medicine. OBJECTIVE: In this review, we briefly summarize the studies of pharmacogenomics in epilepsy, recent advances, and how it may progress in the future. METHODS: We subdivided the review into two main sections: genetic variants that may modulate response to AEDs through pharmacokinetics or pharmacodynamics mechanisms; and gene variants that may affect tolerability and safety of AEDs...
September 10, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28890855/effects-of-tire-leachate-on-the-invasive-mosquito-aedes-albopictus-and-the-native-congener-aedes-triseriatus
#19
Oswaldo C Villena, Ivana Terry, Kayoko Iwata, Edward R Landa, Shannon L LaDeau, Paul T Leisnham
Discarded vehicle tire casings are an important artificial habitat for the developmental stages of numerous vector mosquitoes. Discarded vehicle tires degrade under ultraviolet light and leach numerous soluble metals (e.g., barium, cadmium, zinc) and organic substances (e.g., benzothiazole and its derivatives [BZTs], polyaromatic hydrocarbons [PAHs]) that could affect mosquito larvae that inhabit the tire casing. This study examined the relationship between soluble zinc, a common marker of tire leachate, on mosquito densities in tire habitats in the field, and tested the effects of tire leachate on the survival and development of newly hatched Aedes albopictus and Aedes triseriatus larvae in a controlled laboratory dose-response experiment...
2017: PeerJ
https://www.readbyqxmd.com/read/28888810/bystander-automated-external-defibrillator-use-and-clinical-outcomes-after-out-of-hospital-cardiac-arrest-a-systematic-review-and-meta-analysis
#20
REVIEW
Mathias J Holmberg, Mikael Vognsen, Mikkel S Andersen, Michael W Donnino, Lars W Andersen
AIM: To systematically review studies comparing bystander automated external defibrillator (AED) use to no AED use in regard to clinical outcomes in out-of-hospital cardiac arrest (OHCA), and to provide a descriptive summary of studies on the cost-effectiveness of bystander AED use. METHODS: We searched Medline, Embase, the Web of Science, and the Cochrane Library for randomized trials and observational studies published before June 1, 2017. Meta-analyses were performed for patients with all rhythms, shockable rhythms, and non-shockable rhythms...
September 6, 2017: Resuscitation
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