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Rotavirus immune response

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https://www.readbyqxmd.com/read/28504192/correlates-of-protection-for-enteric-vaccines
#1
Jan Holmgren, Umesh D Parashar, Stanley Plotkin, Jacques Louis, Su-Peing Ng, Eric Desauziers, Valentina Picot, Mitra Saadatian-Elahi
An immunological Correlate of Protection (CoP) is an immune response that is statistically interrelated with protection. Identification of CoPs for enteric vaccines would help design studies to improve vaccine performance of licensed vaccines in low income settings, and would facilitate the testing of future vaccines in development that might be more affordable. CoPs are lacking today for most existing and investigational enteric vaccines. In order to share the latest information on CoPs for enteric vaccines and to discuss novel approaches to correlate mucosal immune responses in humans with protection, the Foundation Mérieux organized an international conference of experts where potential CoPs for vaccines were examined using case-studies for both bacterial and viral enteric pathogens...
May 11, 2017: Vaccine
https://www.readbyqxmd.com/read/28484432/rice-bran-and-probiotics-alter-the-porcine-large-intestine-and-serum-metabolomes-for-protection-against-human-rotavirus-diarrhea
#2
Nora Jean Nealon, Lijuan Yuan, Xingdong Yang, Elizabeth P Ryan
Human rotavirus (HRV) is a leading cause of severe childhood diarrhea, and there is limited vaccine efficacy in the developing world. Neonatal gnotobiotic pigs consuming a prophylactic synbiotic combination of probiotics and rice bran (Pro+RB) did not exhibit HRV diarrhea after challenge. Multiple immune, gut barrier protective, and anti-diarrheal mechanisms contributed to the prophylactic efficacy of Pro+RB when compared to probiotics (Pro) alone. In order to understand the molecular signature associated with diarrheal protection by Pro+RB, a global non-targeted metabolomics approach was applied to investigate the large intestinal contents and serum of neonatal gnotobiotic pigs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28481726/rotavirus-shedding-following-administration-of-rv3-bb-human-neonatal-rotavirus-vaccine
#3
Daniel Cowley, Karen Boniface, Nada Bogdanovic-Sakran, Carl D Kirkwood, Julie E Bines
The RV3-BB human neonatal rotavirus vaccine aims to provide protection from severe rotavirus disease from birth. A phase IIa safety and immunogenicity trial was undertaken in Dunedin, New Zealand between January 2012 and April 2014. Healthy, full-term (≥36 weeks gestation) babies, who were 0-5 days old were randomly assigned (1:1:1) to receive three doses of oral RV3-BB vaccine with the first dose given at 0-5 days after birth (neonatal schedule), or the first dose given at about 8 weeks after birth (infant schedule), or to receive placebo (placebo schedule)...
May 8, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28453843/inflammation-and-immune-activation-in-antiretroviral-treated-human-immunodeficiency-virus-type-1-infected-african-infants-and-rotavirus-vaccine-responses
#4
Priyanka Uprety, Jane C Lindsey, Myron J Levin, Kaitlin Rainwater-Lovett, Carrie Ziemniak, Mutsa Bwakura-Dangarembizix, Susan S Kaplan, Micki Nelson, Amanda Zadzilka, Adriana Weinberg, Deborah Persaud
00880698.
March 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28422995/characterization-of-rotavirus-infection-in-children-with-acute-gastroenteritis-in-bengo-province-northwestern-angola-prior-to-vaccine-introduction
#5
Carolina Gasparinho, João Piedade, Maria Clara Mirante, Cristina Mendes, Carlos Mayer, Susana Vaz Nery, Miguel Brito, Claudia Istrate
BACKGROUND: Rotavirus group A (RVA) is considered the leading cause of pediatric diarrhea, responsible for the high burden of diarrheal diseases in sub-Saharan Africa. Despite recent studies, the existent data are scarce for some African countries like Angola, a country with one of the highest RVA-related death estimates. The aim of this study was to determine the RVA detection rate and circulating genotypes in children less than five years of age with acute gastroenteritis attended at the Bengo General Hospital in Caxito, Bengo province, Angola, before vaccine introduction...
2017: PloS One
https://www.readbyqxmd.com/read/28414969/cytokines-in-the-management-of-rotavirus-infection-a-systematic-review-of-in-vivo-studies
#6
REVIEW
Gopalsamy Rajiv Gandhi, Victor Santana Santos, Marina Denadai, Valdete Kaliane da Silva Calisto, Jullyana de Souza Siqueira Quintans, Ana Mara de Oliveira E Silva, Adriano Antunes de Souza Araújo, Narendra Narain, Luis Eduardo Cuevas, Lucindo José Quintans Júnior, Ricardo Queiroz Gurgel
OBJECTIVE: Rotavirus is a leading cause of childhood diarrhoea. Rotavirus vaccines are effective against severe rotavirus gastroenteritis, but have lower efficacy in low income countries in Africa. Anti-rotavirus treatment is not available. This study reviews the literature of animal studies evaluating whether cytokine mediated pathways of immune activation could improve rotavirus therapy. METHODS: We performed a systematic review of articles in English published from 2010 to 2016 reporting agents with in vivo antirotavirus activity for the management of rotavirus infection...
April 14, 2017: Cytokine
https://www.readbyqxmd.com/read/28407442/rotavirus-capsid-vp6-tubular-and-spherical-nanostructures-act-as-local-adjuvants-when-co-delivered-with-norovirus-vlps
#7
Maria Malm, Suvi Heinimäki, Timo Vesikari, Vesna Blazevic
A subunit protein vaccine candidate based on norovirus (NoV) virus-like particles (VLPs) and rotavirus (RV) VP6 protein against acute childhood gastroenteritis has been recently proposed. RV VP6 forms different oligomeric nanostructures, including tubes and spheres when expressed in vitro, which are highly immunogenic in different animal models. We have recently shown that recombinant VP6 nanotubes have an adjuvant effect on immunogenicity of NoV VLPs in mice. In this study, we investigated if the adjuvant effect is dependent on a VP6 dose or different VP6 structural assemblies...
April 13, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/28396664/unraveling-the-differences-between-gram-positive-and-gram-negative-probiotics-in-modulating-protective-immunity-to-enteric-infections
#8
REVIEW
Sukumar Kandasamy, Anastasia N Vlasova, David D Fischer, Kuldeep S Chattha, Lulu Shao, Anand Kumar, Stephanie N Langel, Abdul Rauf, Huang-Chi Huang, Gireesh Rajashekara, Linda J Saif
The role of intestinal microbiota and probiotics in prevention and treatment of infectious diseases, including diarrheal diseases in children and animal models, is increasingly recognized. Intestinal commensals play a major role in development of the immune system in neonates and in shaping host immune responses to pathogens. Lactobacilli spp. and Escherichia coli Nissle 1917 are two probiotics that are commonly used in children to treat various medical conditions including human rotavirus diarrhea and inflammatory bowel disease...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28360258/impact-of-maternal-antibodies-and-infant-gut-microbiota-on-the-immunogenicity-of-rotavirus-vaccines-in-african-indian-and-european-infants-protocol-for-a-prospective-cohort-study
#9
Kuladaipalayam Natarajan C Sindhu, Nigel Cunliffe, Matthew Peak, Mark Turner, Alistair Darby, Nicholas Grassly, Melita Gordon, Queen Dube, Sudhir Babji, Ira Praharaj, Valsan Verghese, Miren Iturriza-Gómara, Gagandeep Kang
INTRODUCTION: Gastroenteritis is the leading cause of morbidity and mortality among young children living in resource-poor settings, majority of which is attributed to rotavirus. Rotavirus vaccination can therefore have a significant impact on infant mortality. However, rotavirus vaccine efficacy in Sub-Saharan Africa and Southeast Asia is significantly lower than in high-income countries. Maternally derived antibodies, infant gut microbiota and concomitant oral polio vaccination have been proposed as potential reasons for poor vaccine performance in low-income settings...
March 29, 2017: BMJ Open
https://www.readbyqxmd.com/read/28355206/hepatic-mdr3-expression-impacts-lipid-homeostasis-and-susceptibility-to-inflammatory-bile-duct-obstruction-in-neonates
#10
Alexandra N Carey, Wujuan Zhang, Kenneth D R Setchell, Julia R Simmons, Tiffany Shi, Celine S Lages, Mary Mullen, Kaitlin Carroll, Rebekah Karns, Kazuhiko Bessho, Rachel Sheridan, Xueheng Zhao, Susanne N Weber, Alexander G Miethke
BackgroundHeterozygous mutations in the gene ABCB4, encoding the phospholipid floppase MDR3 (Mdr2 in mice), are associated with various chronic liver diseases. Here we hypothesize that reduced ABCB4 expression predisposes to extrahepatic biliary atresia (EHBA).MethodsLivers from neonatal wild-type (wt) and heterozygous Mdr2-deficient mice were subjected to mass spectrometry-based lipidomics and RNA sequencing studies. Following postnatal infection with rhesus rotavirus (RRV), liver immune responses and EHBA phenotype were assessed...
May 3, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28335454/porcine-rotaviruses-epidemiology-immune-responses-and-control-strategies
#11
REVIEW
Anastasia N Vlasova, Joshua O Amimo, Linda J Saif
Rotaviruses (RVs) are a major cause of acute viral gastroenteritis in young animals and children worldwide. Immunocompetent adults of different species become resistant to clinical disease due to post-infection immunity, immune system maturation and gut physiological changes. Of the 9 RV genogroups (A-I), RV A, B, and C (RVA, RVB, and RVC, respectively) are associated with diarrhea in piglets. Although discovered decades ago, porcine genogroup E RVs (RVE) are uncommon and their pathogenesis is not studied well...
March 18, 2017: Viruses
https://www.readbyqxmd.com/read/28293236/interferon-lambda-modulating-immunity-in-infectious-diseases
#12
REVIEW
Mohammedyaseen Syedbasha, Adrian Egli
Interferon lambdas (IFN-λs; IFNL1-4) modulate immunity in the context of infections and autoimmune diseases, through a network of induced genes. IFN-λs act by binding to the heterodimeric IFN-λ receptor (IFNLR), activating a STAT phosphorylation-dependent signaling cascade. Thereby hundreds of IFN-stimulated genes are induced, which modulate various immune functions via complex forward and feedback loops. When compared to the well-characterized IFN-α signaling cascade, three important differences have been discovered...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28216189/rotavirus-immunization-global-coverage-and-local-barriers-for-implementation
#13
Andrea Lo Vecchio, Ilaria Liguoro, Jorge Amil Dias, James A Berkley, Chris Boey, Mitchell B Cohen, Sylvia Cruchet, Eduardo Salazar-Lindo, Samir Podder, Bhupinder Sandhu, Philip M Sherman, Toshiaki Shimizu, Alfredo Guarino
BACKGROUND: Rotavirus (RV) is a major agent of gastroenteritis and an important cause of child death worldwide. Immunization (RVI) has been available since 2006, and the Federation of International Societies of Gastroenterology Hepatology and Nutrition (FISPGHAN) identified RVI as a top priority for the control of diarrheal illness. A FISPGHAN working group on acute diarrhea aimed at estimating the current RVI coverage worldwide and identifying barriers to implementation at local level...
February 16, 2017: Vaccine
https://www.readbyqxmd.com/read/28212334/transfer-of-anti-rotavirus-antibodies-during-pregnancy-and-in-milk-following-maternal-vaccination-with-a-herpes-simplex-virus-type-1-amplicon-vector
#14
Anita F Meier, Mark Suter, Elisabeth M Schraner, Bruno M Humbel, Kurt Tobler, Mathias Ackermann, Andrea S Laimbacher
Rotaviruses (RVs) are important enteric pathogens of newborn humans and animals, causing diarrhea and in rare cases death, especially in very young individuals. Rotavirus vaccines presently used are modified live vaccines that lack complete biological safety. Previous work from our laboratory suggested that vaccines based on in situ produced, non-infectious rotavirus-like particles (RVLPs) are efficient while being entirely safe. However, using either vaccine, active mucosal immunization cannot induce protective immunity in newborns due to their immature immune system...
February 16, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28168269/inflammation-and-immune-activation-in-antiretroviral-treated-hiv-1-infected-african-infants-and-rotavirus-vaccine-responses
#15
Priyanka Uprety, Jane C Lindsey, Myron J Levin, Kaitlin Rainwater-Lovett, Carrie Ziemniak, Mutsa Bwakura-Dangarembizix, Susan S Kaplan, Micki Nelson, Amanda Zadzilka, Adriana Weinberg, Deborah Persaud
No abstract text is available yet for this article.
February 7, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28166850/a-fermented-milk-concentrate-and-a-combination-of-short-chain-galacto-oligosaccharides-long-chain-fructo-oligosaccharides-pectin-derived-acidic-oligosaccharides-protect-suckling-rats-from-rotavirus-gastroenteritis
#16
Mar Rigo-Adrover, Teresa Pérez-Berezo, Sara Ramos-Romero, Kees van Limpt, Karen Knipping, Johan Garssen, Jan Knol, Àngels Franch, Margarida Castell, Francisco J Pérez-Cano
Human milk contains bioactive compounds that confer a protective role against gastrointestinal infections. In order to find supplements for an infant formula able to mimic these benefits of breast-feeding, two different concepts were tested. The products consisted of the following: (1) a Bifidobacterium breve- and Streptococcus thermophilus-fermented formula and (2) a combination of short-chain galacto-oligosaccharides/long-chain fructo-oligosaccharides with pectin-derived acidic oligosaccharides. A rotavirus infection suckling rat model was used to evaluate improvements in the infectious process and in the immune response of supplemented animals...
January 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28162821/safety-of-live-vaccinations-on-immunosuppressive-therapy-in-patients-with-immune-mediated-inflammatory-diseases-solid-organ-transplantation-or-after-bone-marrow-transplantation-a-systematic-review-of-randomized-trials-observational-studies-and-case-reports
#17
REVIEW
Evelina Croce, Christoph Hatz, Emile F Jonker, L G Visser, Veronika K Jaeger, Silja Bühler
BACKGROUND: Live vaccines are generally contraindicated on immunosuppressive therapy due to safety concerns. However, data are limited to corroborate this practice. OBJECTIVES: To estimate the safety of live vaccinations in patients with immune-mediated inflammatory diseases (IMID) or solid organ transplantation (SOT) on immunosuppressive treatment and in patients after bone-marrow transplantation (BMT). DATA SOURCES: A search was conducted in electronic databases (Cochrane, Pubmed, Embase) and additional literature was identified by targeted searches...
March 1, 2017: Vaccine
https://www.readbyqxmd.com/read/28140752/concomitant-administration-of-diphtheria-tetanus-acellular-pertussis-and-inactivated-poliovirus-vaccine-derived-from-sabin-strains-dtap-sipv-with-pentavalent-rotavirus-vaccine-in-japanese-infants
#18
Yoshiyuki Tanaka, Ruriko Yokokawa, Han Shi Rong, Hiroyuki Kishino, Jon E Stek, Margaret Nelson, Jody Lawrence
Rotavirus is the leading cause of severe acute gastroenteritis in infants and young children. Most children are infected with rotavirus, and the health and economic burdens of rotavirus gastroenteritis on healthcare systems and families are considerable. In 2012 pentavalent rotavirus vaccine (RV5) and diphtheria, tetanus, acellular pertussis and inactivated poliovirus vaccine derived from Sabin strains (DTaP-sIPV) were licensed in Japan. We examined the immunogenicity and safety of DTaP-sIPV when administrated concomitantly with RV5 in Japanese infants...
January 31, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28137864/entirely-plasmid-based-reverse-genetics-system-for-rotaviruses
#19
Yuta Kanai, Satoshi Komoto, Takahiro Kawagishi, Ryotaro Nouda, Naoko Nagasawa, Misa Onishi, Yoshiharu Matsuura, Koki Taniguchi, Takeshi Kobayashi
Rotaviruses (RVs) are highly important pathogens that cause severe diarrhea among infants and young children worldwide. The understanding of the molecular mechanisms underlying RV replication and pathogenesis has been hampered by the lack of an entirely plasmid-based reverse genetics system. In this study, we describe the recovery of recombinant RVs entirely from cloned cDNAs. The strategy requires coexpression of a small transmembrane protein that accelerates cell-to-cell fusion and vaccinia virus capping enzyme...
February 28, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28077655/expression-of-ifnlr1-on-intestinal-epithelial-cells-is-critical-to-the-antiviral-effects-of-interferon-lambda-against-norovirus-and-reovirus
#20
Megan T Baldridge, Sanghyun Lee, Judy J Brown, Nicole McAllister, Kelly Urbanek, Terence S Dermody, Timothy J Nice, Herbert W Virgin
Lambda interferon (IFN-λ) has potent antiviral effects against multiple enteric viral pathogens, including norovirus and rotavirus, in both preventing and curing infection. Because the intestine includes a diverse array of cell types, however, the cell(s) upon which IFN-λ acts to exert its antiviral effects is unclear. Here, we sought to identify IFN-λ-responsive cells by generation of mice with lineage-specific deletion of the receptor for IFN-λ, Ifnlr1 We found that expression of IFNLR1 on intestinal epithelial cells (IECs) in the small intestine and colon is required for enteric IFN-λ antiviral activity...
April 1, 2017: Journal of Virology
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