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Japanese encephalitis vaccine

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https://www.readbyqxmd.com/read/29217376/safety-tolerability-and-immunogenicity-of-two-zika-virus-dna-vaccine-candidates-in-healthy-adults-randomised-open-label-phase-1-clinical-trials
#1
Martin R Gaudinski, Katherine V Houser, Kaitlyn M Morabito, Zonghui Hu, Galina Yamshchikov, Ro Shauna Rothwell, Nina Berkowitz, Floreliz Mendoza, Jamie G Saunders, Laura Novik, Cynthia S Hendel, LaSonji A Holman, Ingelise J Gordon, Josephine H Cox, Srilatha Edupuganti, Monica A McArthur, Nadine G Rouphael, Kirsten E Lyke, Ginny E Cummings, Sandra Sitar, Robert T Bailer, Bryant M Foreman, Katherine Burgomaster, Rebecca S Pelc, David N Gordon, Christina R DeMaso, Kimberly A Dowd, Carolyn Laurencot, Richard M Schwartz, John R Mascola, Barney S Graham, Theodore C Pierson, Julie E Ledgerwood, Grace L Chen
BACKGROUND: The Zika virus epidemic and associated congenital infections have prompted rapid vaccine development. We assessed two new DNA vaccines expressing premembrane and envelope Zika virus structural proteins. METHODS: We did two phase 1, randomised, open-label trials involving healthy adult volunteers. The VRC 319 trial, done in three centres, assessed plasmid VRC5288 (Zika virus and Japanese encephalitis virus chimera), and the VRC 320, done in one centre, assessed plasmid VRC5283 (wild-type Zika virus)...
December 4, 2017: Lancet
https://www.readbyqxmd.com/read/29192069/full-length-genome-sequence-of-japanese-encephalitis-virus-strain-fc792-isolated-from-guangxi-china
#2
Bingxia Lu, Yibin Qin, Bin Li, Ying He, Qunpeng Duan, Jiaxing Liang, Zhongwei Chen, Qianlian Su, Bingfen Bi, Wu Zhao
We report here the complete genomic sequence of Japanese encephalitis virus (JEV) strain FC792, isolated from aborted fetuses of sows which were unimmunized with JEV vaccines in Guangxi Province, southern China. The complete JEV genome of strain FC792 had the highest nucleotide homology (99.7%) and amino acid identity (99.4%) with the sequence of JEV strain SA14-14-2 (GenBank accession number AF315119). Phylogenetic analysis showed that strain FC792 had the closest phylogenetic relationship to the sequence of strain YUNNAN0901 (GenBank accession number JQ086762)...
November 30, 2017: Genome Announcements
https://www.readbyqxmd.com/read/29183842/systematic-review-of-seroepidemiologic-studies-on-japanese-encephalitis-in-the-republic-of-korea
#3
REVIEW
Young June Choe, Anne-Frieda Taurel, Joshua Nealon, Han Seok Seo, Hee Soo Kim
BACKGROUND: Countries with strong vaccination programs, including the Republic of Korea, have experienced changes in the epidemiology of Japanese encephalitis (JE) with an increase in cases seen in adults. However, the reasons for this increase are not clearly understood. This study describes the change in age specific JE seroprevalence over time in Korea with a view to understand this transition. METHODS: A search of EMBASE, MEDLINE, Pubmed, KoreaMed, Korea Education and Research Information Service, National Library of Korea, and the Seoul National University Medical Library was conducted using the keyword 'Japanese encephalitis' combined with 'Korea', 'seroprevalence', 'seropositivity', 'seroepidemiology', 'serosurvey', 'immunity', and 'antibody'...
November 25, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29147873/comparison-of-the-adjuvanticity-of-two-adjuvant-formulations-containing-de-o-acylated-lipooligosaccharide-on-japanese-encephalitis-vaccine-in-mice
#4
Ara Ko, Seo Ri Wui, Ji In Ryu, Hien Thi Thu Do, Yeon Jeong Lee, Soo Jeong Lim, Inmoo Rhee, Dae Im Jung, Jin-Ah Park, Jung-Ah Choi, Man Ki Song, Na Gyong Lee
Adjuvants are essential vaccine components used to enhance, accelerate, and/or prolong adaptive immunity against specific vaccine antigens. In this study, we compared the adjuvanticity of two adjuvant formulations containing de-O-acylated lipooligosaccharide (dLOS), a toll-like receptor 4 agonist, on the Japanese encephalitis (JE) vaccine in mice. Mice were immunized once or twice at a two-week interval with inactivated JE vaccine in the absence or presence of adjuvant. We found that both the alum- and the liposome-based formulation induced significantly faster and higher serum IgG antibody responses as compared with the non-adjuvanted vaccine after either one or two immunizations...
November 17, 2017: Archives of Pharmacal Research
https://www.readbyqxmd.com/read/29081368/immunogenicity-and-safety-of-a-single-dose-of-a-live-attenuated-japanese-encephalitis-chimeric-virus-vaccine-in-vietnam-a-single-arm-single-center-study
#5
Vu Dinh Thiem, Nguyen Dang Quang, Tran Thi Ai Huong, Valérie Bosch-Castells, Céline Zocchetti, Guy Houillon
OBJECTIVE: To describe the immunogenicity and safety of the Japanese encephalitis chimeric virus vaccine (JE-CV) in children and adults in Vietnam. METHODS: In this prospective, open-label, single-center, single-arm study, 250 healthy participants aged 9 months to 60 years received a single dose of JE-CV (IMOJEV(®)). JE neutralizing antibody titers were assessed at baseline and 28days after vaccination using the 50% plaque reduction neutralization test (PRNT50)...
October 25, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/29076102/epidemiological-profile-of-acute-viral-encephalitis
#6
Rajesh Kumar, Pankaj Kumar, Manoj Kumar Singh, Dipti Agarwal, Bendangienla Jamir, Shashi Khare, Samrendra Narayan
OBJECTIVE: To study the etiology and clinico-epidemiological profile of acute viral encephalitis in children with acute encephalitis syndrome (AES). METHODS: An observational study including 100 patients fulfilling the criteria for AES was conducted in children of age group 1 mo - 16 y. Viral isolation was done on RD cells, HEp-2 cells and Vero cells from the cerebrospinal fluid samples of suspected viral encephalitis (VE) cases. An enzyme immunoassay for IgM antibodies was performed for measles, mumps, Varicella zoster virus (VZV), Herpes simplex virus 1 (HSV1) and Japanese encephalitis virus (JEV)...
October 27, 2017: Indian Journal of Pediatrics
https://www.readbyqxmd.com/read/29057937/significance-of-ccl2-ccl5-and-ccr2-polymorphisms-for-adverse-prognosis-of-japanese-encephalitis-from-an-endemic-population-of-india
#7
Purvita Chowdhury, Siraj Ahmed Khan
Japanese encephalitis (JE) is a major contributor for viral encephalitis in Asia. Vaccination programme has limited success for largely populated JE endemic countries like India and disease exposure is unavoidable. Involvement of chemokines and its co-receptors for adverse prognosis of JE have been documented both in vitro and in vivo. Identification of the genetic predisposing factor for JE infection in humans is crucial but not yet established. Therefore, we investigated the association of single nucleotide polymorphisms (SNPs) in chemokines (CCL2 and CCL5) and its co-receptors (CCR2 and CCR5) with their protein level for JE...
October 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29050802/episode-of-kasabach-merritt-phenomenon-following-japanese-encephalitis-vaccination-case-report
#8
Xiaojie Yue, Xiong Zhao, Yefeng Dai, Qiang Shu
Kasabach-Merritt phenomenon (KMP) is a rare potentially life-threatening consumptive coagulopathy characterized by thrombocytopenia and hypofibrinogenemia occurring associated with the vascular tumors kaposiform hemangioendothelioma (KHE) and tufted angioma (TA). A 10-month old male infant, diagnosed with KHE on his left leg, underwent a rapid increase of the lesion and severe thrombocytopenia, one day after the first dose of inactivated Japanese encephalitis (JE) vaccination. The episode of KMP was treated successfully by steroid...
October 16, 2017: Vaccine
https://www.readbyqxmd.com/read/28969658/characterization-and-epitope-mapping-of-dengue-virus-type-1-specific-monoclonal-antibodies
#9
Wen-Hung Chen, Feng-Pai Chou, Yu-Kuo Wang, Sheng-Cih Huang, Chuan-Hung Cheng, Tung-Kung Wu
BACKGROUND: Dengue virus (DV) infection causes a spectrum of clinical diseases ranging from dengue fever to a life-threatening dengue hemorrhagic fever. Four distinct serotypes (DV1-4), which have similar genome sequences and envelope protein (E protein) antigenic properties, were divided. Among these 4 serotypes, DV1 usually causes predominant infections and fast diagnosis and effective treatments are urgently required to prevent further hospitalization and casualties. METHODS: To develop antibodies specifically targeting and neutralizing DV1, we immunized mice with UV-inactivated DV1 viral particles and recombinant DV1 E protein from residue 1 to 395 (E395), and then generated 12 anti-E monoclonal antibodies (mAbs) as the candidates for a series of characterized assays such as ELISA, dot blot, immunofluorescence assay, western blot, and foci forming analyses...
October 2, 2017: Virology Journal
https://www.readbyqxmd.com/read/28959858/-progress-in-zika-virus-and-its-vaccines
#10
Deqiao Tian, Wei Chen
Like Yellow fever virus, Dengue virus, Japanese encephalitis virus and West Nile virus, Zika virus is also a mosquito-borne flavivirus. Since it was isolated in 1947, there has been little concern over Zika virus due to its limited distribution and mild symptoms. In recent years, especially since 2015, Zika virus has become a global concern because of its outbreak in Brazil and associated microcephaly. Vaccines against Zika virus, regarded as the effective measures to control Zika fever epidemic, are being developed in nearly thirty institutions worldwide...
January 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28938099/plasmid-dna-launches-live-attenuated-japanese-encephalitis-virus-and-elicits-virus-neutralizing-antibodies-in-balb-c-mice
#11
Brian Nickols, Irina Tretyakova, Alexander Tibbens, Elena Klyushnenkova, Peter Pushko
We describe novel plasmid DNA that encodes the full-length Japanese encephalitis virus (JEV) genomic cDNA and launches live-attenuated JEV vaccine in vitro and in vivo. The synthetic cDNA based on the sequence of JEV SA14-14-2 live-attenuated virus was placed under transcriptional control of the cytomegalovirus major immediate-early promoter. The stability and yields of the plasmid in E. coli were optimized by inserting three synthetic introns that disrupted JEV cDNA in the structural and nonstructural genes...
December 2017: Virology
https://www.readbyqxmd.com/read/28934197/updated-estimation-of-the-impact-of-a-japanese-encephalitis-immunization-program-with-live-attenuated-sa-14-14-2-vaccine-in-nepal
#12
Shyam Raj Upreti, Nicole P Lindsey, Rajendra Bohara, Ganga Ram Choudhary, Sushil Shakya, Mukunda Gautam, Jagat Narain Giri, Marc Fischer, Susan L Hills
BACKGROUND: Japanese encephalitis (JE) is a mosquito-borne disease that is associated with considerable morbidity and mortality in many Asian countries. The objective of this study was to describe the impact of the JE immunization program using SA 14-14-2 JE vaccine implemented in Nepal during 2006 through 2011. A previous assessment after the initial program implementation phase described a significantly lower post-campaign JE incidence compared to expected incidence; however, the previous evaluation had limited post-campaign data for some districts...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28930529/a-protocol-for-investigating-the-association-of-vaccination-and-anti-nmda-receptor-encephalitis
#13
Hsiuying Wang
Anti-N-methyl-D-aspartate (Anti-NMDA) receptor encephalitis is an acute autoimmune neurological disorder that can be triggered by virus, H1N1/tetanus/diphtheria/pertussis and polio vaccines or by presence of a tumor. The association between anti-NMDA receptor encephalitis and Japanese encephalitis vaccination was examined and a general protocol of phylogenetic method which details the steps and code and an example of its utility is provided. The approach used here is potentially useful for analyzing the relationship between vaccines and diseases...
January 1, 2018: Frontiers in Bioscience (Scholar Edition)
https://www.readbyqxmd.com/read/28883984/the-changing-epidemiology-of-japanese-encephalitis-and-new-data-the-implications-for-new-recommendations-for-japanese-encephalitis-vaccine
#14
REVIEW
Bradley Connor, William B Bunn
The epidemiology of Japanese Encephalitis and risk to the traveler has changed and continues to evolve. The spread of Japanese Encephalitis virus into new environments, changes in agricultural practice and animal vectors, climate change, peri-urban growth, changes in international travel to Asia, personal risk factors, mosquito vector free transmission, interactions with other flaviviruses and better information on infections without encephalitis and other factors make Japanese Encephalitis an underappreciated risk...
2017: Tropical Diseases, Travel Medicine and Vaccines
https://www.readbyqxmd.com/read/28876040/-secreted-expression-of-japanese-encephalitis-virus-prme-in-pichia-pastoris-and-immunogenicity-evaluation-of-the-virus-like-particles-in-mice
#15
Peng Zhao, Ya Jiang, Jingman Wang, Haojie Fan, Ruibing Cao
The study was to express prME protein of Japanese encephalitis virus (JEV) in Pichia pastoris and then to evaluate the immunological properties of the recombinant protein in mice, so as to explore a new way for subunit vaccine development of JEV. The JEV prME gene was amplified by RT-PCR with genome RNA of JEV vaccine strain SA14-14-2 and subcloned into pPICZa-A vector, designated as pPICZα-prME. pPICZα-SprME was constructed same as pPICZα-prME besides with the additional 19 Aa signal peptides coding gene of the JEV cap protein C terminal...
May 25, 2017: Sheng Wu Gong Cheng Xue Bao, Chinese Journal of Biotechnology
https://www.readbyqxmd.com/read/28869941/identifying-attenuating-mutations-tools-for-a-new-vaccine-design-against-flaviviruses
#16
Cécile Khou, Nathalie Pardigon
Emerging Flaviviruses pose an increasing threat to global human health. To date, human vaccines against yellow fever virus (YFV), Japanese encephalitis virus (JEV), dengue virus (DV), and tick-borne encephalitis virus (TBEV) exist. However, there is no human vaccine against other Flaviviruses such as Zika virus (ZIKV) and West Nile virus (WNV). In order to restrict their spread and to protect populations against the diseases they induce, vaccines against these emerging viruses must be designed. Obtaining new live attenuated Flavivirus vaccines using molecular biology methods is now possible...
2017: Intervirology
https://www.readbyqxmd.com/read/28867843/estimated-economic-impact-of-vaccinations-in-73-low-and-middle-income-countries-2001-2020
#17
Sachiko Ozawa, Samantha Clark, Allison Portnoy, Simrun Grewal, Meghan L Stack, Anushua Sinha, Andrew Mirelman, Heather Franklin, Ingrid K Friberg, Yvonne Tam, Neff Walker, Andrew Clark, Matthew Ferrari, Chutima Suraratdecha, Steven Sweet, Sue J Goldie, Tini Garske, Michelle Li, Peter M Hansen, Hope L Johnson, Damian Walker
OBJECTIVE: To estimate the economic impact likely to be achieved by efforts to vaccinate against 10 vaccine-preventable diseases between 2001 and 2020 in 73 low- and middle-income countries largely supported by Gavi, the Vaccine Alliance. METHODS: We used health impact models to estimate the economic impact of achieving forecasted coverages for vaccination against Haemophilus influenzae type b, hepatitis B, human papillomavirus, Japanese encephalitis, measles, Neisseria meningitidis serogroup A, rotavirus, rubella, Streptococcus pneumoniae and yellow fever...
September 1, 2017: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/28867626/enhanced-cytopathic-effect-of-japanese-encephalitis-virus-strain-sa14-14-2-probable-association-of-mutation-in-amino-acid-of-its-envelope-protein
#18
Barnali Nath, Ashutosh Gupta, Siraj A Khan, Sachin Kumar
Japanese encephalitis (JE) is a mosquito-borne viral disease. It is a global public health concern since it causes an acute encephalitis syndrome (AES). A large number of JE/AES cases are reported to occur in areas with established or developing JE vaccination program. Partial vaccine coverage and emergence of new variants of Japanese encephalitis virus (JEV) might be playing an important role. The envelope protein (E) of JEV is a major antigenic determinant and responsible for immunogenic responses as well as membrane fusion and virion assembly...
October 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28841362/use-of-the-live-attenuated-japanese-encephalitis-vaccine-sa-14-14-2-in-children-a-review-of-safety-and-tolerability-studies
#19
Amy Sarah Ginsburg, Ankita Meghani, Scott B Halstead, Mansour Yaich
Japanese encephalitis (JE) is the leading cause of viral neurological disease and disability in Asia. Some 50-80% of children with clinical JE die or have long-term neurologic sequelae. Since there is no cure, human vaccination is the only effective long-term control measure, and the World Health Organization recommends that at-risk populations receive a safe and effective vaccine. Four different types of JE vaccines are currently available: inactivated mouse brain-derived vaccines, inactivated Vero cell vaccines, live attenuated SA 14-14-2 vaccines and a live recombinant (chimeric) vaccine...
October 3, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28838191/expansion-of-surveillance-for-vaccine-preventable-diseases-building-on-the-global-polio-laboratory-network-and-the-global-measles-and-rubella-laboratory-network-platforms
#20
Mick N Mulders, Fatima Serhan, James L Goodson, Joseph Icenogle, Barbara W Johnson, Paul A Rota
Laboratory networks were established to provide accurate and timely laboratory confirmation of infections, an essential component of disease surveillance systems. The World Health Organization (WHO) coordinates global laboratory surveillance of vaccine-preventable diseases (VPDs), including polio, measles and rubella, yellow fever, Japanese encephalitis, rotavirus, and invasive bacterial diseases. In addition to providing high-quality laboratory surveillance data to help guide disease control, elimination, and eradication programs, these global networks provide capacity-building and an infrastructure for public health laboratories...
July 1, 2017: Journal of Infectious Diseases
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