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Chikungunya CHIKV

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https://www.readbyqxmd.com/read/28223458/mutation-of-the-n-terminal-region-of-chikungunya-virus-capsid-protein-implications-for-vaccine-design
#1
Adam Taylor, Xiang Liu, Ali Zaid, Lucas Y H Goh, Jody Hobson-Peters, Roy A Hall, Andres Merits, Suresh Mahalingam
Mosquito-transmitted chikungunya virus (CHIKV) is an arthritogenic alphavirus of the Togaviridae family responsible for frequent outbreaks of arthritic disease in humans. Capsid protein, a structural protein encoded by the CHIKV RNA genome, is able to translocate to the host cell nucleolus. In encephalitic alphaviruses, nuclear translocation induces host cell transcriptional shutoff; however, the role of capsid protein nucleolar localization in arthritogenic alphaviruses remains unclear. Using recombinant enhanced green fluorescent protein (EGFP)-tagged expression constructs and CHIKV infectious clones, we describe a nucleolar localization sequence (NoLS) in the N-terminal region of capsid protein, previously uncharacterized in CHIKV...
February 21, 2017: MBio
https://www.readbyqxmd.com/read/28222127/unusual-pattern-of-chikungunya-virus-epidemic-in-the-americas-the-panamanian-experience
#2
Jean-Paul Carrera, Yamilka Díaz, Bernardino Denis, Itza Barahona de Mosca, Dennys Rodriguez, Israel Cedeño, Dimelza Arauz, Publio González, Lizbeth Cerezo, Lourdes Moreno, Lourdes García, Lisseth E Sáenz, María Aneth Atencio, Eddy Rojas-Fermin, Fernando Vizcaino, Nicolas Perez, Brechla Moreno, Sandra López-Vergès, Anayansi Valderrama, Blas Armién
BACKGROUND: Chikungunya virus (CHIKV) typically causes explosive epidemics of fever, rash and polyarthralgia after its introduction into naïve populations. Since its introduction in Panama in May of 2014, few autochthonous cases have been reported; most of them were found within limited outbreaks in Panama City in 2014 and Puerto Obaldia town, near the Caribbean border with Colombia in 2015. In order to confirm that Panama had few CHIKV cases compared with neighboring countries, we perform an epidemiological analysis of chikungunya cases reported from May 2014 to July 2015...
February 21, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28208912/chikungunya-and-myositis-a-case-report-in-brazil
#3
Hugo Andre Martins, Silvya Nery Bernardino, Camila Cordeiro Santos, Valdenilson Ribeiro Ribas
Chikungunya Virus (CHIKV) is a well-described alpha virus that causes infection in humans. The main symptoms are fever, rash and arthralgia and recently neurological disorders have been reported, in particular encephalitis. It is uncertain whether neurological symptoms are due to persistence of the virus or an ineffective immune response. One rarely described neurologic syndrome is myositis. In this paper, we report the case of a 19-year-old woman with mental confusion and aggressiveness two days after complaints of fever and arthralgia...
December 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28207896/rna-seq-analysis-of-chikungunya-virus-infection-and-identification-of-granzyme-a-as-a-major-promoter-of-arthritic-inflammation
#4
Jane A C Wilson, Natalie A Prow, Wayne A Schroder, Jonathan J Ellis, Helen E Cumming, Linden J Gearing, Yee Suan Poo, Adam Taylor, Paul J Hertzog, Francesca Di Giallonardo, Linda Hueston, Roger Le Grand, Bing Tang, Thuy T Le, Joy Gardner, Suresh Mahalingam, Pierre Roques, Phillip I Bird, Andreas Suhrbier
: Chikungunya virus (CHIKV) is an arthritogenic alphavirus causing epidemics of acute and chronic arthritic disease. Herein we describe a comprehensive RNA-Seq analysis of feet and lymph nodes at peak viraemia (day 2 post infection), acute arthritis (day 7) and chronic disease (day 30) in the CHIKV adult wild-type mouse model. Genes previously shown to be up-regulated in CHIKV patients were also up-regulated in the mouse model. CHIKV sequence information was also obtained with up to ≈8% of the reads mapping to the viral genome; however, no adaptive viral genome changes were apparent...
February 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28194661/guillain-barre-syndrome-complicating-chikungunya-virus-infection
#5
Ayush Agarwal, Deepti Vibha, Achal Kumar Srivastava, Garima Shukla, Kameshwar Prasad
Chikungunya virus (CHIKV) is a mosquito-borne alphavirus which presents with symptoms of fever, rash, arthralgia, and occasional neurologic disease. While outbreaks have been earlier reported from India and other parts of the world, the recent outbreak in India witnessed more than 1000 cases. Various systemic and rarely neurological complications have been reported with CHIKV. We report two cases of Guillain-Barré syndrome (GBS) with CHIKV. GBS is a rare neurological complication which may occur after subsidence of fever and constitutional symptoms by several neurotropic viruses...
February 13, 2017: Journal of Neurovirology
https://www.readbyqxmd.com/read/28192064/aedes-borne-virus-mosquito-interactions-mass-spectrometry-strategies-and-findings
#6
Victoria Pando-Robles, Cesar V Batista
Aedes-borne viruses are responsible for high-impact neglected tropical diseases and unpredictable outbreaks such as the ongoing Zika epidemics. Aedes mosquitoes spread different arboviruses such as Dengue virus (DENV), Chikungunya virus (CHIKV), and Zika virus, among others, and are responsible for the continuous emergence and reemergence of these pathogens. These viruses have complex transmission cycles that include two hosts, namely the Aedes mosquito as a vector and susceptible vertebrate hosts. Human infection with arboviruses causes diseases that range from subclinical or mild to febrile diseases, encephalitis, and hemorrhagic fever...
February 13, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28182795/the-neutralizing-role-of-igm-during-early-chikungunya-virus-infection
#7
Chong-Long Chua, I-Ching Sam, Chun-Wei Chiam, Yoke-Fun Chan
The antibody isotype IgM appears earlier than IgG, within days of onset of symptoms, and is important during the early stages of the adaptive immune response. Little is known about the functional role of IgM during infection with chikungunya virus (CHIKV), a recently reemerging arbovirus that has caused large global outbreaks. In this study, we studied antibody responses in 102 serum samples collected during CHIKV outbreaks in Malaysia. We described the neutralizing role of IgM at different times post-infection and examined the independent contributions of IgM and IgG towards the neutralizing capacity of human immune sera during the early phase of infection, including the differences in targets of neutralizing epitopes...
2017: PloS One
https://www.readbyqxmd.com/read/28182667/environmental-and-social-change-drive-the-explosive-emergence-of-zika-virus-in-the-americas
#8
REVIEW
Sofia Ali, Olivia Gugliemini, Serena Harber, Alexandra Harrison, Lauren Houle, Javarcia Ivory, Sierra Kersten, Rebia Khan, Jenny Kim, Chris LeBoa, Emery Nez-Whitfield, Jamieson O'Marr, Emma Rothenberg, R Max Segnitz, Stephanie Sila, Anna Verwillow, Miranda Vogt, Adrienne Yang, Erin A Mordecai
Since Zika virus (ZIKV) was detected in Brazil in 2015, it has spread explosively across the Americas and has been linked to increased incidence of microcephaly and Guillain-Barré syndrome (GBS). In one year, it has infected over 500,000 people (suspected and confirmed cases) in 40 countries and territories in the Americas. Along with recent epidemics of dengue (DENV) and chikungunya virus (CHIKV), which are also transmitted by Aedes aegypti and Ae. albopictus mosquitoes, the emergence of ZIKV suggests an ongoing intensification of environmental and social factors that have given rise to a new regime of arbovirus transmission...
February 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28174559/zika-virus-chikungunya-virus-and-dengue-virus-in-cerebrospinal-fluid-from-adults-with-neurological-manifestations-guayaquil-ecuador
#9
Nathalie Acevedo, Jesse Waggoner, Michelle Rodriguez, Lissette Rivera, José Landivar, Benjamin Pinsky, Hector Zambrano
Zika virus (ZIKV), chikungunya virus (CHIKV), and dengue virus (DENV) have been associated with clinical presentations that involve acute neurological complaints. In the current study, we identified ZIKV, CHIKV, and DENV in cerebrospinal fluid (CSF) samples from patients admitted to the Hospital Luis Vernaza (Guayaquil, Ecuador) to the Emergency Room or the Intensive Care Unit, with neurological symptoms and/or concern for acute arboviral infections. Viral RNA from one or more virus was detected in 12/16 patients...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28161634/transcriptome-analysis-of-aedes-aegypti-in-response-to-mono-infections-and-co-infections-of-dengue-virus-2-and-chikungunya-virus
#10
Jatin Shrinet, Pratibha Srivastava, Sujatha Sunil
Chikungunya virus (CHIKV) and Dengue virus (DENV) spread via the bite of infected Aedes mosquitoes. Both these viruses exist as co-infections in the host as well as the vector and are known to exploit their cellular machinery for their replication. While there are studies reporting the changes in Aedes transcriptome when infected with DENV and CHIKV individually, the effect both these viruses have on the mosquitoes when present as co-infections is not clearly understood. In the present study, we infected Aedes aegypti mosquitoes with DENV and CHIKV individually and as co-infection through nanoinjections...
February 1, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28152379/selective-transduction-of-astrocytic-and-neuronal-cns-subpopulations-by-lentiviral-vectors-pseudotyped-with-chikungunya-virus-envelope
#11
Ioanna Eleftheriadou, Michael Dieringer, Xuan Ying Poh, Julia Sanchez-Garrido, Yunan Gao, Argyro Sgourou, Laura E Simmons, Nicholas D Mazarakis
Lentiviral vectors are gene delivery vehicles that integrate into the host genome of dividing and non-dividing mammalian cells facilitating long-term transgene expression. Lentiviral vector versatility is greatly increased by incorporating heterologous viral envelope proteins onto the vector particles instead of the native envelope, conferring on these pseudotyped vectors a modified tropism and host range specificity. We investigated the pseudotyping efficiency of HIV-1 based lentiviral vectors with alphaviral envelope proteins from the Chikungunya Virus (CHIKV-G) and Sindbis Virus (SINV-G)...
January 23, 2017: Biomaterials
https://www.readbyqxmd.com/read/28148847/blunting-chikv-infection-by-keeping-t-cells-in-check
#12
REVIEW
Philippe Gasque, Marie Christine Jaffar-Bandjee
Modulating the host immune response ameliorates arthritic disease in mice infected with chikungunya virus (Miner et al and Teo et al).
February 1, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28148840/therapy-with-ctla4-ig-and-an-antiviral-monoclonal-antibody-controls-chikungunya-virus-arthritis
#13
Jonathan J Miner, Lindsey E Cook, Jun P Hong, Amber M Smith, Justin M Richner, Raeann M Shimak, Alissa R Young, Kristen Monte, Subhajit Poddar, James E Crowe, Deborah J Lenschow, Michael S Diamond
In 2013, chikungunya virus (CHIKV) transmission was documented in the Western Hemisphere, and the virus has since spread throughout the Americas with more than 1.8 million people infected in more than 40 countries. CHIKV targets the joints, resulting in symmetric polyarthritis that clinically mimics rheumatoid arthritis and can endure for months to years. At present, no approved treatment is effective in preventing or controlling CHIKV infection or disease. We treated mice with eight different disease-modifying antirheumatic drugs and identified CLTA4-Ig (abatacept) and tofacitinib as candidate therapies based on their ability to decrease acute joint swelling...
February 1, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28148838/fingolimod-treatment-abrogates-chikungunya-virus-induced-arthralgia
#14
Teck-Hui Teo, Yi-Hao Chan, Wendy W L Lee, Fok-Moon Lum, Siti Naqiah Amrun, Zhisheng Her, Ravisankar Rajarethinam, Andres Merits, Olaf Rötzschke, Laurent Rénia, Lisa F P Ng
Chikungunya virus (CHIKV) is one of the many rheumatic arthropod-borne alphaviruses responsible for debilitating joint inflammation in humans. Despite the severity in many endemic regions, clinically approved intervention targeting the virus remains unavailable. CD4(+) T cells have been shown to mediate CHIKV-induced joint inflammation in mice. We demonstrate here that transfer of splenic CD4(+) T cells from virus-infected C57BL/6 mice into virus-infected T cell receptor-deficient (TCR(-/-)) mice recapitulated severe joint pathology including inflammation, vascular leakages, subcutaneous edema, and skeletal muscle necrosis...
February 1, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28143925/adp-ribosylhydrolase-activity-of-chikungunya-virus-macrodomain-is-critical-for-virus-replication-and-virulence
#15
Robert Lyle McPherson, Rachy Abraham, Easwaran Sreekumar, Shao-En Ong, Shang-Jung Cheng, Victoria K Baxter, Hans A V Kistemaker, Dmitri V Filippov, Diane E Griffin, Anthony K L Leung
Chikungunya virus (CHIKV), an Old World alphavirus, is transmitted to humans by infected mosquitoes and causes acute rash and arthritis, occasionally complicated by neurologic disease and chronic arthritis. One determinant of alphavirus virulence is nonstructural protein 3 (nsP3) that contains a highly conserved MacroD-type macrodomain at the N terminus, but the roles of nsP3 and the macrodomain in virulence have not been defined. Macrodomain is a conserved protein fold found in several plus-strand RNA viruses that binds to the small molecule ADP-ribose...
January 31, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28138049/clinical-manifestations-associated-with-peripheral-joint-involvement-in-patients-with-acute-chikungunya-virus-infection
#16
Mariangelí Arroyo-Ávila, Amanda Cabán, Enid J García-Rivera, Marisela Irizarry-Pérez, Hilda Torres, Héctor Gorbea, Luis M Vilá
Chikungunya virus (CHIKV) causes an acute febrile illness usually accompanied by severe polyarthralgia and polyarthritis. Previous studies have shown that older age, female gender, and some comorbid conditions are associated with chronic CHIKV arthritis. However, the factors associated with acute arthralgia and arthritis are not well known. Thus, we studied the clinical manifestations associated with acute peripheral joint involvement in a group of CHIKV patients from Puerto Rico. Patients with a history of fever for < 7 days evaluated at the emergency department of a university-based hospital were tested for several pathogens including CHIKV...
January 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28137799/characterization-of-%C3%AE-d-n4-hydroxycytidine-as-a-novel-inhibitor-of-chikungunya-virus
#17
Maryam Ehteshami, Sijia Tao, Keivan Zandi, Hui-Mien Hsiao, Yong Jiang, Emily Hammond, Franck Amblard, Olivia O Russell, Andres Merits, Raymond F Schinazi
Chikungunya virus (CHIKV) represents a re-emerging global threat to human health. Recent outbreaks across Asia, Europe, Africa and the Caribbean have prompted renewed scientific interest in this mosquito-borne alphavirus. There are currently no vaccines against CHIKV and treatment has been limited to non-specific antiviral agents, with sub-optimal outcomes. Herein, we have identified β-D-N(4)-hydroxycytidine (NHC) as a novel inhibitor of CHIKV. NHC behaves as a pyrimidine ribonucleoside and selectively inhibit CHIKV replication in cell culture...
January 30, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28135274/genetic-evidence-for-a-worldwide-chaotic-dispersion-pattern-of-the-arbovirus-vector-aedes-albopictus
#18
Mosè Manni, Carmela R Guglielmino, Francesca Scolari, Anubis Vega-Rúa, Anna-Bella Failloux, Pradya Somboon, Antonella Lisa, Grazia Savini, Mariangela Bonizzoni, Ludvik M Gomulski, Anna R Malacrida, Giuliano Gasperi
BACKGROUND: Invasive species represent a global concern for their rapid spread and the possibility of infectious disease transmission. This is the case of the global invader Aedes albopictus, the Asian tiger mosquito. This species is a vector of medically important arboviruses, notably chikungunya (CHIKV), dengue (DENV) and Zika (ZIKV). The reconstruction of the complex colonization pattern of this mosquito has great potential for mitigating its spread and, consequently, disease risks...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28125580/molecular-mimicry-between-chikungunya-virus-and-host-components-a-possible-mechanism-for-the-arthritic-manifestations
#19
Vijayalakshmi Reddy, Anita Desai, Shankar Susarla Krishna, Ravi Vasanthapuram
BACKGROUND: Chikungunya virus (CHIKV), a reemerging pathogen causes a self limited illness characterized by fever, headache, myalgia and arthralgia. However, 10-20% affected individuals develop persistent arthralgia which contributes to considerable morbidity. The exact molecular mechanisms underlying these manifestations are not well understood. The present study investigated the possible occurrence of molecular mimicry between CHIKV E1 glycoprotein and host human components. METHODOLOGY: Bioinformatic tools were used to identify peptides of CHIKV E1 exhibiting similarity to host components...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28115671/mosquito-exposure-and-chikungunya-and-dengue-infection-among-travelers-during-the-chikungunya-outbreak-in-the-americas
#20
David A Lindholm, Todd Myers, Susana Widjaja, Edward M Grant, Kalyani Telu, Tahaniyat Lalani, Jamie Fraser, Mary Fairchok, Anuradha Ganesan, Mark D Johnson, Anjali Kunz, David R Tribble, Heather C Yun
Travelers are at risk for arbovirus infection. We prospectively enrolled 267 Department of Defense beneficiaries traveling to chikungunya-outbreak regions in the Americas between December 2013 and May 2015 and assessed travel characteristics and serologic exposure to chikungunya virus (CHIKV) and dengue virus (DENV). Ten ill returning travelers were also assessed retrospectively. Self-reported mosquito exposure was common (64% of 198 evaluable travelers saw mosquitoes; 53% of 201 reported ≥ 1 bite). Increased exposure was associated with active-duty travelers (odds ratio [OR] = 2...
January 23, 2017: American Journal of Tropical Medicine and Hygiene
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