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Japanese encephalitis vaccine

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https://www.readbyqxmd.com/read/28435908/development-of-a-japanese-encephalitis-virus-like-particle-vaccine-in-silkworms-using-codon-optimised-prm-and-envelope-genes
#1
Sayaka Matsuda, Reiko Nerome, Kenichi Maegawa, Akira Kotaki, Shigeo Sugita, Kazunori Kawasaki, Kazumichi Kuroda, Ryoji Yamaguchi, Tomohiko Takasaki, Kuniaki Nerome
We have successfully prepared a Japanese encephalitis virus (JEV) - Nakayama virus like particle (NVLP) vaccine using synthetic codon-optimized prM and E genes. The expression of the recombinant JEV Nakayama-BmNPV (JEV-NNPV) virus was determined in infected silkworm Bm-N cells by fluorescence and Western blot analysis. The recombinant was inoculated into silkworm pupae and the yield of Nakayama VLP (NVLP) reached a peak in the homogenates after 3 days. Additionally, in the peptide analysis of infected pupae homogenate, it appeared approximately 300-500 μg E protein/pupa were produced...
April 2017: Heliyon
https://www.readbyqxmd.com/read/28430748/immunogenicity-of-the-inactivated-japanese-encephalitis-virus-vaccine-ixiaro%C3%A2-n-children-from-a-japanese-encephalitis-virus-endemic-region
#2
Katrin L Dubischar, Vera Kadlecek, Benjamin Sablan, Charissa Fay Borja-Tabora, Salvacion Gatchalian, Susanne Eder-Lingelbach, Sigrid Kiermayr, Martin Spruth, Kerstin Westritschnig
BACKGROUND: Japanese encephalitis (JE) is a major public health concern in Asia and poses a small, but potentially fatal threat to travelers from non-endemic countries, including children. No JE vaccine for pediatric use has been available in Europe and the USA. METHODS: Age-stratified cohorts of children between 2 months and 17 years received 2 doses of Vero cell-derived inactivated JE virus vaccine (IXIARO) administered 28 days apart (<3 years 0.25 mL [half adult dose], ≥3 years 0...
April 19, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28394283/single-round-infectious-particle-antiviral-screening-assays-for-the-japanese-encephalitis-virus
#3
Chien-Yi Lu, Mann-Jen Hour, Ching-Ying Wang, Su-Hua Huang, Wen-Xiang Mu, Yu-Chun Chang, Cheng-Wen Lin
Japanese Encephalitis virus (JEV) is a mosquito-borne flavivirus with a positive-sense single-stranded RNA genome that contains a big open reading frame (ORF) flanked by 5'- and 3'- untranslated regions (UTRs). Nearly 30,000 JE cases with 10,000 deaths are still annually reported in East Asia. Although the JEV genotype III vaccine has been licensed, it elicits a lower protection against other genotypes. Moreover, no effective treatment for a JE case is developed. This study constructed a pBR322-based and cytomegaloviruses (CMV) promoter-driven JEV replicon for the production of JEV single-round infectious particles (SRIPs) in a packaging cell line expressing viral structural proteins...
April 10, 2017: Viruses
https://www.readbyqxmd.com/read/28382163/visualization-of-a-neurotropic-flavivirus-infection-in-mouse-reveals-unique-viscerotropism-controlled-by-host-type-i-interferon-signaling
#4
Xiao-Feng Li, Xiao-Dan Li, Cheng-Lin Deng, Hao-Long Dong, Qiu-Yan Zhang, Qing Ye, Han-Qing Ye, Xing-Yao Huang, Yong-Qiang Deng, Bo Zhang, Cheng-Feng Qin
Flavivirus includes a large group of human pathogens with medical importance. Especially, neurotropic flaviviruses capable of invading central and peripheral nervous system, e.g. Japanese encephalitis virus (JEV) and Zika virus (ZIKV), are highly pathogenic to human and constitute major global health problems. However, the dynamic dissemination and pathogenesis of neurotropic flavivirus infections remain largely unknown. Here, using JEV as a model, we rationally designed and constructed a recombinant reporter virus that stably expressed Renilla luciferase (Rluc)...
2017: Theranostics
https://www.readbyqxmd.com/read/28357054/recent-advances-in-japanese-encephalitis
#5
REVIEW
Anirban Basu, Kallol Dutta
Japanese encephalitis is a flaviviral disease that is endemic to the South, Southeast Asia, and Asia Oceania regions. Given that about 60% of the world's population (about 7.4 billion) resides in this region (about 4.4 billion), this disease poses a significant threat to global health. Active vaccination campaigns conducted in endemic countries have led to a decrease in the number of reported cases over the years. In this article, we strive to briefly highlight recent advances in understanding the role of microRNAs in disease pathology, focus on providing brief summaries of recent clinical trials in the field of Japanese encephalitis therapeutics, and review the current prophylactic strategies...
2017: F1000Research
https://www.readbyqxmd.com/read/28341533/epidemiology-of-infectious-encephalitis-causes-in-2016
#6
REVIEW
A Boucher, J L Herrmann, P Morand, R Buzelé, Y Crabol, J P Stahl, A Mailles
We performed a literature search in the Medline database, using the PubMed website. The incidence of presumably infectious encephalitis is estimated at 1.5-7 cases/100,000 inhabitants/year, excluding epidemics. Infectious encephalitis and immune-mediated encephalitis share similar clinical signs and symptoms. The latter accounts for a significant proportion of presumably infectious encephalitis cases without any established etiological diagnosis; as shown from a prospective cohort study where 21% of cases were due to an immune cause...
March 22, 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28301270/japanese-encephalitis-vaccines-immunogenicity-protective-efficacy-effectiveness-and-impact-on-the-burden-of-disease
#7
Nagendra R Hegde, Milind M Gore
Japanese encephalitis (JE) is a serious public health concern in most of Asia. The disease is caused by JE virus (JEV), a flavivirus transmitted by Culex mosquitoes. Several vaccines have been developed to control JE in endemic areas as well as to protect travelers and military personnel who visit or are commissioned from non-endemic to endemic areas. The vaccines include inactivated vaccines produced in mouse brain or cell cultures, live attenuated vaccines, and a chimeric vaccine based on the live attenuated yellow fever virus 17D vaccine strain...
February 22, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28284628/japanese-encephalitis-virus-infection-diagnosis-and-control-in-domestic-animals
#8
REVIEW
Karen L Mansfield, Luis M Hernández-Triana, Ashley C Banyard, Anthony R Fooks, Nicholas Johnson
Japanese encephalitis virus (JEV) is a significant cause of neurological disease in humans throughout Asia causing an estimated 70,000 human cases each year with approximately 10,000 fatalities. The virus contains a positive sense RNA genome within a host-derived membrane and is classified within the family Flaviviridae. Like many flaviviruses, it is transmitted by mosquitoes, particularly those of the genus Culex in a natural cycle involving birds and some livestock species. Spill-over into domestic animals results in a spectrum of disease ranging from asymptomatic infection in some species to acute neurological signs in others...
March 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28264652/insight-into-snps-and-epitopes-of-e-protein-of-newly-emerged-genotype-i-isolates-of-jev-from-midnapur-west-bengal-india
#9
Shyamashree Banerjee, Parth Sarthi Sen Gupta, Amal Kumar Bandyopadhyay
BACKGROUND: Japanese encephalitis virus (JEV) is a mosquito-borne flavivirus that causes Japanese Encephalitis (JE) and Acute Encephalitis Syndrome (AES) in humans. Genotype-I (as co-circulating cases with Genotype-III) was isolated in 2010 (JEV28, JEV21) and then in 2011 (JEV45) from Midnapur district, West Bengal (WB) for the first time from clinical patients who were previously been vaccinated with live attenuated SA14-14-2 strain. We apply bioinformatics and immunoinformatics on sequence and structure of E protein for analysis of crucial substitutions that might cause the genotypic transition, affecting protein-function and altering specificity of epitopes...
March 6, 2017: BMC Immunology
https://www.readbyqxmd.com/read/28250536/adapting-nepal-s-polio-eradication-programme
#10
Krishna P Paudel, Lee M Hampton, Santosh Gurung, Rajendra Bohara, Indra K Rai, Sameer Anaokar, Rachel D Swift, Stephen Cochi
PROBLEM: Many countries have weak disease surveillance and immunization systems. The elimination of polio creates an opportunity to use staff and assets from the polio eradication programme to control other vaccine-preventable diseases and improve disease surveillance and immunization systems. APPROACH: In 2003, the active surveillance system of Nepal's polio eradication programme began to report on measles and neonatal tetanus cases. Japanese encephalitis and rubella cases were added to the surveillance system in 2004...
March 1, 2017: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/28250534/pre-exposure-rabies-prophylaxis-a-systematic-review
#11
REVIEW
Jocelyn A Kessels, Sergio Recuenco, Ana Maria Navarro-Vela, Raffy Deray, Marco Vigilato, Hildegund Ertl, David Durrheim, Helen Rees, Louis H Nel, Bernadette Abela-Ridder, Deborah Briggs
OBJECTIVE: To review the safety and immunogenicity of pre-exposure rabies prophylaxis (including accelerated schedules, co-administration with other vaccines and booster doses), its cost-effectiveness and recommendations for use, particularly in high-risk settings. METHODS: We searched the PubMed, Centre for Agriculture and Biosciences International, Cochrane Library and Web of Science databases for papers on pre-exposure rabies prophylaxis published between 2007 and 29 January 2016...
March 1, 2017: Bulletin of the World Health Organization
https://www.readbyqxmd.com/read/28243937/zika-virus-an-emerging-flavivirus
#12
REVIEW
Sang-Im Yun, Young-Min Lee
Zika virus (ZIKV) is a previously little-known flavivirus closely related to Japanese encephalitis, West Nile, dengue, and yellow fever viruses, all of which are primarily transmitted by blood-sucking mosquitoes. Since its discovery in Uganda in 1947, ZIKV has continued to expand its geographic range, from equatorial Africa and Asia to the Pacific Islands, then further afield to South and Central America and the Caribbean. Currently, ZIKV is actively circulating not only in much of Latin America and its neighbors but also in parts of the Pacific Islands and Southeast Asia...
March 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/28208151/bacillus-calmette-gu%C3%A3-rin-confers-neuroprotection-in-a-murine-model-of-japanese-encephalitis
#13
Sahil Kulkarni, Sandeepan Mukherjee, Anupama Pandey, Ritwik Dahake, Usha Padmanabhan, Abhay S Chowdhary
OBJECTIVE: Japanese encephalitis (JE) is a debilitating disease caused by infection with the JE virus (JEV; family: Flaviviridae), which leaves neurological sequelae in survivors but more often leads to mortality. Neurodegeneration caused by inflammation is the primary pathology behind the clinical manifestation of encephalitis caused by JEV. Bacillus Calmette-Guérin (BCG) has been used in immunoprophylaxis for tuberculosis and in the adjuvant therapy of many malignancies, and has exhibited neuroprotective activities in experimental models of Parkinson and Alzheimer disease...
February 17, 2017: Neuroimmunomodulation
https://www.readbyqxmd.com/read/28194210/recommended-immunization-schedule-for-children-and-adolescents-immunization-guideline-8th-edition-released-by-the-korean-pediatric-society-in-2015
#14
REVIEW
Jong-Hyun Kim, Eun Hwa Choi, Su Eun Park, Yae-Jean Kim, Dae Sun Jo, Yun-Kyung Kim, Byung-Wook Eun, Jina Lee, Soo-Young Lee, Hyunju Lee, Ki Hwan Kim, Kyung-Hyo Kim
This report includes the recommended immunization schedule table for children and adolescents based on the 8th (2015) and revised 7th (2012) Immunization Guidelines released by the Committee on Infectious Diseases of the Korean Pediatric Society (KPS). Notable revised recommendations include: reorganization of the immunization table with a list of vaccines on the vertical axis and the corresponding age on the horizontal axis; reflecting the inclusion of Haemophilus influenzae type b vaccine, pneumococcal conjugate vaccine, and hepatitis A vaccine into the National Immunization Program since 2012; addition of general recommendations for 2 new Japanese encephalitis (JE) vaccines and their interchangeability with existing JE vaccines; addition of general recommendations for quadrivalent meningococcal conjugate vaccines and scope of the recommended targets for vaccination; and emphasizing catch-up immunization of Tdap vaccine...
December 2016: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28179396/the-antigenic-structure-of-zika-virus-and-its-relation-to-other-flaviviruses-implications-for-infection-and-immunoprophylaxis
#15
REVIEW
Franz X Heinz, Karin Stiasny
Zika virus was discovered ∼70 years ago in Uganda and maintained a low profile as a human disease agent in Africa and Asia. Only recently has it caused explosive outbreaks in previously unaffected regions, first in Oceania and then in the Americas since 2015. Of special concern is the newly identified link between congenital malformations (especially microcephaly) and Zika virus infections during pregnancy. At present, it is unclear whether Zika virus changed its pathogenicity or whether the huge number of infections allowed the recognition of a previously cryptic pathogenic property...
March 2017: Microbiology and Molecular Biology Reviews: MMBR
https://www.readbyqxmd.com/read/28135273/cellular-immune-responses-to-live-attenuated-japanese-encephalitis-je-vaccine-sa14-14-2-in-adults-in-a-je-dengue-co-endemic-area
#16
Lance Turtle, Filippo Tatullo, Tanushka Bali, Vasanthapuram Ravi, Mohammed Soni, Sajesh Chan, Savita Chib, Manjunatha M Venkataswamy, Prachi Fadnis, Mansour Yaïch, Stefan Fernandez, Paul Klenerman, Vijaya Satchidanandam, Tom Solomon
BACKGROUND: Japanese encephalitis (JE) virus (JEV) causes severe epidemic encephalitis across Asia, for which the live attenuated vaccine SA14-14-2 is being used increasingly. JEV is a flavivirus, and is closely related to dengue virus (DENV), which is co-endemic in many parts of Asia, with clinically relevant interactions. There is no information on the human T cell response to SA14-14-2, or whether responses to SA14-14-2 cross-react with DENV. We used live attenuated JE vaccine SA14-14-2 as a model for studying T cell responses to JEV infection in adults, and to determine whether these T cell responses are cross-reactive with DENV, and other flaviviruses...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28106787/anti-nmda-receptor-encephalitis-and-vaccination
#17
Hsiuying Wang
Anti-N-methyl-d-aspartate (Anti-NMDA) receptor encephalitis is an acute autoimmune neurological disorder. The cause of this disease is often unknown, and previous studies revealed that it might be caused by a virus, vaccine or tumor. It occurs more often in females than in males. Several cases were reported to be related to vaccination such as the H1N1 vaccine and tetanus/diphtheria/pertussis and polio vaccines. In this study, we reported an anti-NMDA receptor encephalitis case that may be caused by Japanese encephalitis vaccination...
January 18, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28088249/interactions-of-human-microglia-cells-with-japanese-encephalitis-virus
#18
Nils Lannes, Viviane Neuhaus, Brigitte Scolari, Solange Kharoubi-Hess, Michael Walch, Artur Summerfield, Luis Filgueira
BACKGROUND: Japanese encephalitis virus (JEV) is a neurotropic flavivirus causing mortality and morbidity in humans. Severe Japanese encephalitis cases display strong inflammatory responses in the central nervous system and an accumulation of viral particles in specific brain regions. Microglia cells are the unique brain-resident immune cell population with potent migratory functions and have been proposed to act as a viral reservoir for JEV. Animal models suggest that the targeting of microglia by JEV is partially responsible for inflammatory reactions in the brain...
January 14, 2017: Virology Journal
https://www.readbyqxmd.com/read/28077444/protein-interactions-during-the-flavivirus-and-hepacivirus-life-cycle
#19
REVIEW
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...
April 2017: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/28072958/-investigation-on-immunization-program-coverage-rate-and-its-safety-in-children-with-tuberous-sclerosis
#20
Y Gao, L P Zou, M N Zhang, L Y Pang, Y Y Wang, S F Ma, L L Huang
Objective: To investigate the status of immunization of National Immunization Program (NIP) and its adverse reaction rate in children with tuberous sclerosis. Method: Questionnaire survey was adopted to identify the vaccination coverage and its adverse events; 72 cases of children with tuberous sclerosis and 78 normal controls (healthy children completing age-appropriate NIP) admitted to Chinese People's Liberation Army General Hospital from December 2014 to November 2015 were involved into this study. Result: The age-appropriate NIP coverage rate of tuberous sclerosis was 36%(26/72)...
January 2, 2017: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
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