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Chikungunya CHIKV

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https://www.readbyqxmd.com/read/29314033/amustaline-s-303-treatment-inactivates-high-levels-of-chikungunya-virus-in-red-blood-cell-components
#1
M Aubry, A Laughhunn, F Santa Maria, M C Lanteri, A Stassinopoulos, D Musso
BACKGROUND AND OBJECTIVES: Chikungunya virus (CHIKV) infections have been reported in all continents, and the potential risk for CHIKV transfusion-transmitted infections (TTIs) was demonstrated by the detection of CHIKV RNA-positive donations in several countries. TTIs can be reduced by pathogen inactivation (PI) of blood products. In this study, we evaluated the efficacy of amustaline and glutathione (S-303/GSH) to inactivate CHIKV in red-blood-cell concentrates (RBCs). MATERIAL AND METHODS: Red-blood-cells were spiked with high level of CHIKV...
January 4, 2018: Vox Sanguinis
https://www.readbyqxmd.com/read/29306785/structure-function-insights-into-chikungunya-virus-capsid-protein-small-molecules-targeting-capsid-hydrophobic-pocket
#2
Rajesh Sharma, Pooja Kesari, Pravindra Kumar, Shailly Tomar
The crystal structure of chikungunya (CHIKV) virus capsid protease domain has been determined at 2.2Å. Structure reveals a chymotrypsin-like protease fold with a conserved hydrophobic pocket in CHIKV capsid protein (CP) for interaction with the cytoplasmic tail of E2 (cdE2) similar to the capsid protein of other alphaviruses. Molecular contacts between CP-cdE2 were determined by fitting structures of CHIKV CP and cdE2 into the cryo-EM map of Venezuelan equine encephalitis virus (VEEV). Binding of (S)-(+)-Mandelic acid (MDA) and Ethyl 3-aminobenzoate (EAB) to the hydrophobic pocket of CP was evaluated by molecular docking...
January 4, 2018: Virology
https://www.readbyqxmd.com/read/29287308/chikungunya-virus-arthritis-implications-of-acute-and-chronic-inflammation-mechanisms-on-patient-management
#3
REVIEW
Ali Zaid, Patrick Gérardin, Adam Taylor, Helen Mostafavi, Denis Malvy, Suresh Mahalingam
In the past decade, arboviruses - arthropod-borne viruses - have been the focus of public health institutions worldwide following a spate of devastating outbreaks. Chikungunya virus (CHIKV), an arbovirus that belongs to the alphavirus genus, is a re-emerging arthritogenic virus that has caused explosive outbreaks since 2006, notably in the Reunion Island, and more recently in the Caribbean, South America, India and South-East Asia. The severity of arthritic disease caused by CHIKV has prompted public health authorities of affected countries to develop specific guidelines to tackle this pathogen...
December 29, 2017: Arthritis & Rheumatology
https://www.readbyqxmd.com/read/29285673/detection-isolation-and-characterization-of-chikungunya-viruses-associated-with-the-pakistan-outbreak-of-2016-2017
#4
Si-Qing Liu, Xiao Li, Ya-Nan Zhang, Ai-Li Gao, Cheng-Lin Deng, Jun-Hua Li, Shoukat Jehan, Nadia Jamil, Fei Deng, Hongping Wei, Bo Zhang
The chikungunya virus (CHIKV) is a mosquito-transmitted alphavirus, which has infected millions of people in Africa, Asia, Americas, and Europe since it reemerged in India and Indian Ocean regions in 2005-2006. Starting in the middle of November 2016, CHIKV has been widely spread, and more than 4,000 cases of infections in humans were confirmed in Pakistan. Here, we report the first isolation and characterization of CHIKV from the Pakistan outbreak. Eight CHIKV strains were newly isolated from human serum samples using a cell culture procedure...
December 21, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29284012/chikungunya-virus-emergence-in-the-lao-pdr-2012-2013
#5
Somphavanh Somlor, Khamsing Vongpayloth, Laure Diancourt, Philippe Buchy, Veasna Duong, Darouny Phonekeo, Pakapak Ketmayoon, Phengta Vongphrachanh, Paul T Brey, Valérie Caro, Yves Buisson, Marc Grandadam
In May 2012, the first authenticated cases of active chikungunya virus infection were detected in Champasak Province, Southern Laos. Analysis of series of human samples and mosquito specimens collected during the outbreak and over the year that followed the emergence enabled the drawing up of a map of the progression of CHIKV and the establishment of a full genetic characterization of the virus.
2017: PloS One
https://www.readbyqxmd.com/read/29281739/lower-temperatures-reduce-type-i-interferon-activity-and-promote-alphaviral-arthritis
#6
Natalie A Prow, Bing Tang, Joy Gardner, Thuy T Le, Adam Taylor, Yee S Poo, Eri Nakayama, Thiago D C Hirata, Helder I Nakaya, Andrii Slonchak, Pamela Mukhopadhyay, Suresh Mahalingam, Wayne A Schroder, William Klimstra, Andreas Suhrbier
Chikungunya virus (CHIKV) belongs to a group of mosquito-borne alphaviruses associated with acute and chronic arthropathy, with peripheral and limb joints most commonly affected. Using a mouse model of CHIKV infection and arthritic disease, we show that CHIKV replication and the ensuing foot arthropathy were dramatically reduced when mice were housed at 30°C, rather than the conventional 22°C. The effect was not associated with a detectable fever, but was dependent on type I interferon responses. Bioinformatics analyses of RNA-Seq data after injection of poly(I:C)/jetPEI suggested the unfolded protein response and certain type I interferon responses are promoted when feet are slightly warmer...
December 27, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29281644/seroprevalence-of-antibodies-against-chikungunya-virus-in-singapore-resident-adult-population
#7
Li Wei Ang, Yiu Wing Kam, Cui Lin, Prabha Unny Krishnan, Joanne Tay, Lee Ching Ng, Lyn James, Vernon J M Lee, Kee Tai Goh, Lisa F P Ng, Raymond T P Lin
OBJECTIVES: We determined the seroprevalence of chikungunya virus (CHIKV) infection in the adult resident population in Singapore following local outbreaks of chikungunya fever (CHIKF) in 2008-2009. METHODS: Our cross-sectional study involved residual sera from 3,293 adults aged 18-79 years who had participated in the National Health Survey in 2010. Sera were tested for IgG antibodies against CHIKV and dengue virus (DENV) and neutralizing antibodies against CHIKV...
December 27, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29277382/prevalence-of-chronic-comorbidities-in-chikungunya-a-systematic-review-and-meta-analysis
#8
Alaa Badawi, Seung Gwan Ryoo, Danitsa Vasileva, Sahar Yaghoubi
BACKGROUND: Epidemiologic evidence suggests that patients with chikungunya virus (CHIKV) infection may be at risk of severe disease complications when they also have comorbidities such as obesity, diabetes, cardiac diseases, and/or asthma. However, the prevalence of these co-existing medical conditions in severe CHIKV cases has not been systematically reported. OBJECTIVE: The aim of the present study is to conduct a systematic review and meta-analysis to describe the prevalence of chronic comorbidities in CHIKV and evaluate their possible contributions to disease severity...
December 19, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29277307/synthesis-and-biological-evaluation-of-6-substituted-5-fluorouridine-protides
#9
Magdalena Slusarczyk, Salvatore Ferla, Andrea Brancale, Christopher McGuigan
A new family of thirteen phosphoramidate prodrugs (ProTides) of different 6-substituted-5-fluorouridine nucleoside analogues were synthesized and evaluated as potential anticancer agents. In addition, antiviral activity against Chikungunya (CHIKV) virus was evaluated using a cytopathic effect inhibition assay. Although a carboxypeptidase Y assay supported a putative mechanism of activation of ProTides built on 5-fluorouridine with such C6-modifications, the Hint docking studies revealed a compromised substrate-activity for the Hint phosphoramidase-type enzyme that is likely responsible for phosphoramidate bioactivation through P-N bond cleavage and free nucleoside 5'-monophosphate delivery...
December 2, 2017: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29259782/chikungunya-vaccines-and-therapeutics
#10
REVIEW
Kothila Tharmarajah, Suresh Mahalingam, Ali Zaid
Chikungunya virus (CHIKV) has come to prominence as a global, re-emerging pathogen over the last two decades, progressing from sporadic, remote outbreaks to worldwide explosive epidemics. From contained, though considerable, outbreaks in the southern Indian Ocean, parts of South America and the Caribbean, CHIKV continues to be a significant pathogen in Southeast Asia and India. CHIKV circulates during epidemics through an urban mosquito-to-human transmission cycle, and with no available treatments or licensed vaccines to specifically target CHIKV disease, limiting transmission relies on vector control, which poses significant challenges, especially in developing countries...
2017: F1000Research
https://www.readbyqxmd.com/read/29247247/aedes-aegypti-microrna-mir-2b-regulates-ubiquitin-related-modifier-to-control-chikungunya-virus-replication
#11
Sunil Kumar Dubey, Jatin Shrinet, Jaspreet Jain, Shakir Ali, Sujatha Sunil
Arboviruses that replicate in mosquitoes activate innate immune response within mosquitoes. Regulatory non-coding microRNAs (miRNA) are known to be modulated in mosquitoes during chikungunya infection. However, information about targets of these miRNAs is scant. The present study was aimed to identify and analyze targets of miRNAs that are regulated during chikungunya virus (CHIKV) replication in Aedes aegypti cells and in the mosquito. Employing next-generation sequencing technologies, we identified a total of 126 miRNAs from the Ae...
December 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29244871/inflammatory-monocytes-mediate-control-of-acute-alphavirus-infection-in-mice
#12
Kelsey C Haist, Kristina S Burrack, Bennett J Davenport, Thomas E Morrison
Chikungunya virus (CHIKV) and Ross River virus (RRV) are mosquito-transmitted alphaviruses that cause debilitating acute and chronic musculoskeletal disease. Monocytes are implicated in the pathogenesis of these infections; however, their specific roles are not well defined. To investigate the role of inflammatory Ly6ChiCCR2+ monocytes in alphavirus pathogenesis, we used CCR2-DTR transgenic mice, enabling depletion of these cells by administration of diptheria toxin (DT). DT-treated CCR2-DTR mice displayed more severe disease following CHIKV and RRV infection and had fewer Ly6Chi monocytes and NK cells in circulation and muscle tissue compared with DT-treated WT mice...
December 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/29243070/extensive-evolution-analysis-of-the-global-chikungunya-virus-strains-revealed-the-origination-of-chikv-epidemics-in-pakistan-in-2016
#13
Junming Shi, Zhengyuan Su, Zhaojun Fan, Jun Wang, Siqing Liu, Bo Zhang, Hongping Wei, Shoukat Jehan, Nadia Jamil, Shu Shen, Fei Deng
Chikungunya virus (CHIKV) is a mosquito-borne virus that causes epidemics widely in the world especially in the tropical and subtropical regions. Phylogenetic analysis has found that the CHIKV lineages were associated with the spatial and temporal distributions, which were related to the virus adaption to the major mosquito species and their distributions. In this study, we reported the complete genome sequences of eight CHIKV isolates from the outbreak in Pakistan last year. Then we reviewed the evolutionary history using extensive phylogenetic analysis, analyzed lineagespecific substitutions in viral proteins, and characterized the spreading pathway of CHIKV strains including the Pakistani strains...
December 11, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29237708/vaccine-and-therapeutic-options-to-control-chikungunya-virus
#14
REVIEW
Ann M Powers
Beginning in 2004, chikungunya virus (CHIKV) went from an endemic pathogen limited to Africa and Asia that caused periodic outbreaks to a global pathogen. Given that outbreaks caused by CHIKV have continued and expanded, serious consideration must be given to identifying potential options for vaccines and therapeutics. Currently, there are no licensed products in this realm, and control relies completely on the use of personal protective measures and integrated vector control, which are only minimally effective...
January 2018: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/29232453/detection-of-zika-virus-in-aedes-mosquitoes-from-mexico
#15
Herón Huerta, Jesús Felipe González-Roldán, Gustavo Sánchez-Tejeda, Fabián Correa-Morales, Francisco Eduardo Romero-Contreras, Raúl Cárdenas-Flores, Mónica Liliana Rangel-Martínez, Juan Manuel Mata-Rivera, José de Jesús Siller-Martínez, Gonzalo M Vazquez-Prokopec, Pablo Manrique-Saide, Felipe Dzul-Manzanilla, Mauricio Vázquez-Pichardo, Claudia Rosales-Jiménez, María de la Luz Torres-Rodríguez, Alma Núñez-León, Belem Torres-Longoria, Irma López-Martínez, Cuitláhuac Ruíz-Matus, Pablo Antonio Kuri-Morales, José Alberto Díaz-Quiñónez
Background: We report on the results of an entomovirological surveillance system of Aedes populations performed by the Ministry of Health of the central state of San Luis Potosí, Mexico. Methods: Indoor adult Aedes aegypti and Aedes albopictus pools collected at San Martín, Tamazunchale, Ciudad Valles, Metlapa, Ebano, Tamuin and Axtla during the dry season of 2016 were examined for the presence of dengue (DENV), chikungunya (CHIKV) and Zika (ZIKV) viruses using real-time PCR...
July 1, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29206195/psychological-distress-and-zika-dengue-and-chikungunya-symptoms-following-the-2016-earthquake-in-bah%C3%A3-a-de-car%C3%A3-quez-ecuador
#16
Anna M Stewart-Ibarra, Anita Hargrave, Avriel Diaz, Aileen Kenneson, David Madden, Moory M Romero, Juan Pablo Molina, David Macias Saltos
On 16 April 2016, a 7.8 magnitude earthquake struck coastal Ecuador, resulting in significant mortality and morbidity, damages to infrastructure, and psychological trauma. This event coincided with the first outbreak of Zika virus (ZIKV) and co-circulation with dengue virus (DENV) and chikungunya virus (CHIKV). We tested whether the degree of psychological distress was associated with the presence of suspected DENV, CHIKV, ZIKV (DCZ) infections three months after the earthquake. In July 2016, 601 household members from four communities in Bahía de Caráquez, Manabí Province, Ecuador, were surveyed in a post-disaster health evaluation...
December 5, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29194359/chikungunya-virus-pathophysiology-mechanism-and-modeling
#17
REVIEW
Vaishnavi K Ganesan, Bin Duan, St Patrick Reid
Chikungunya virus (CHIKV), a mosquito-transmitted alphavirus, is recurring in epidemic waves. In the past decade and a half, the disease has resurged in several countries around the globe, with outbreaks becoming increasingly severe. Though CHIKV was first isolated in 1952, there remain significant gaps in knowledge of CHIKV biology, pathogenesis, transmission, and mechanism. Diagnosis is largely simplified and based on symptoms, while treatment is supportive rather than curative. Here we present an overview of the disease, the challenges that lie ahead for future research, and what directions current studies are headed towards, with emphasis on improvement of current animal models and potential use of 3D models...
December 1, 2017: Viruses
https://www.readbyqxmd.com/read/29191474/chikungunya-related-erosive-arthritis-case-report-and-literature-review
#18
Francisco Castro-Domínguez, Tarek Carlos Salman-Monte, Fabiola Ojeda, Patricia Corzo, Irene Carrión-Barberá, Ivan Camilo Garcia-Duitama, Jordi Monfort
Chikungunya virus infection (CHIKV) is associated with joint involvement in half of the cases. This can lead to erosive arthritis which, given the high intervariability of clinical and serological presentations, and the probable role of genetic conditioning in the severity and chronification of the condition, represents a great diagnostic and therapeutic challenge. There is an important lack of scientific evidence that would enable us to characterize the variability of the patient and choose the most appropriate approach...
November 27, 2017: Reumatología Clinica
https://www.readbyqxmd.com/read/29188427/recent-progress-on-chikungunya-virus-research
#19
REVIEW
Wenxi An, Ningning Ge, Yilin Cao, Jin Sun, Xia Jin
Chikungunya virus (CHIKV) is an arbovirus transmitted by Aedes mosquitos in tropical and subtropical regions across the world. After decades of sporadic outbreaks, it re-emerged in Africa, Asia, India Ocean and America suddenly, causing major regional epidemics recently and becoming a notable global health problem. Infection by CHIKV results in a spectrum of clinical diseases including an acute self-limiting febrile illness in most individuals, a chronic phase of recurrent join pain in a proportion of patients, and long-term arthralgia for months to years for the unfortunate few...
November 28, 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29185115/the-synergistic-effect-of-nsp2-l618-nsp3-r117-and-e2-k187-on-the-large-plaque-phenotype-of-chikungunya-virus
#20
Benjawan Thoka, Thitigun Jaimipak, Supachoke Onnome, Sutee Yoksan, Sukathida Ubol, Rojjanaporn Pulmanausahakul
Chikungunya virus (CHIKV), a mosquito-borne Alphavirus, is the etiological agent of chikungunya fever. CHIKV re-emerged from 2004 onwards, and subsequently caused major outbreaks in many parts of the world including the Indian Ocean islands, Asia, and the Americas. In this study, a large plaque variant of CHIKV isolated from patient in Thailand was subjected to repeated cycles of plaque-purification in Vero cells. The resulting virus produced homogenous large plaques and showed a more pathogenic phenotype than the parental wild-type CHIKV...
November 28, 2017: Virus Genes
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