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Rotavirus immune response

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https://www.readbyqxmd.com/read/28636595/nlrp9b-inflammasome-restricts-rotavirus-infection-in-intestinal-epithelial-cells
#1
Shu Zhu, Siyuan Ding, Penghua Wang, Zheng Wei, Wen Pan, Noah W Palm, Yi Yang, Hua Yu, Hua-Bing Li, Geng Wang, Xuqiu Lei, Marcel R de Zoete, Jun Zhao, Yunjiang Zheng, Haiwei Chen, Yujiao Zhao, Kellie A Jurado, Ningguo Feng, Liang Shan, Yuval Kluger, Jun Lu, Clara Abraham, Erol Fikrig, Harry B Greenberg, Richard A Flavell
Rotavirus, a leading cause of severe gastroenteritis and diarrhoea in young children, accounts for around 215,000 deaths annually worldwide. Rotavirus specifically infects the intestinal epithelial cells in the host small intestine and has evolved strategies to antagonize interferon and NF-κB signalling, raising the question as to whether other host factors participate in antiviral responses in intestinal mucosa. The mechanism by which enteric viruses are sensed and restricted in vivo, especially by NOD-like receptor (NLR) inflammasomes, is largely unknown...
June 21, 2017: Nature
https://www.readbyqxmd.com/read/28634691/modulation-of-rotavirus-severe-gastroenteritis-by-the-combination-of-probiotics-and-prebiotics
#2
REVIEW
Guadalupe Gonzalez-Ochoa, Lilian K Flores-Mendoza, Ramona Icedo-Garcia, Ricardo Gomez-Flores, Patricia Tamez-Guerra
Annual mortality rates due to infectious diarrhea are about 2.2 million; children are the most vulnerable age group to severe gastroenteritis, representing group A rotaviruses as the main cause of disease. One of the main factors of rotavirus pathogenesis is the NSP4 protein, which has been characterized as a viral toxin involved in triggering several cellular responses leading to diarrhea. Furthermore, the rotavirus protein NSP1 has been associated with interferon production inhibition by inducing the degradation of interferon regulatory factors IRF3, IRF5, and IRF7...
June 20, 2017: Archives of Microbiology
https://www.readbyqxmd.com/read/28623028/impact-and-cost-effectiveness-of-rotavirus-vaccination-in-bangladesh
#3
Clint Pecenka, Umesh Parashar, Jacqueline E Tate, Jahangir A M Khan, Devin Groman, Stephen Chacko, Md Shamsuzzaman, Andrew Clark, Deborah Atherly
INTRODUCTION: Diarrheal disease is a leading cause of child mortality globally, and rotavirus is responsible for more than a third of those deaths. Despite substantial decreases, the number of rotavirus deaths in children under five was 215,000 per year in 2013. Of these deaths, approximately 41% occurred in Asia and 3% of those in Bangladesh. While Bangladesh has yet to introduce rotavirus vaccination, the country applied for Gavi support and plans to introduce it in 2018. This analysis evaluates the impact and cost-effectiveness of rotavirus vaccination in Bangladesh and provides estimates of the costs of the vaccination program to help inform decision-makers and international partners...
June 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28620404/oral-administration-of-a-seed-based-bivalent-rotavirus-vaccine-containing-vp6-and-nsp4-induces-specific-immune-responses-in-mice
#4
Hao Feng, Xin Li, Weibin Song, Mei Duan, Hong Chen, Tao Wang, Jiangli Dong
Rotavirus is the leading cause of severe diarrheal disease among newborns. Plant-based rotavirus vaccines have been developed in recent years and have been proven to be effective in animal models. In the present study, we report a bivalent vaccine candidate expressing rotavirus subunits VP6 and NSP4 fused with the adjuvant subunit B of E. coli heat-labile enterotoxin (LTB) in maize seeds. The RT-PCR and Western blot results showed that VP6 and LTB-NSP4 antigens were expressed and accumulated in maize seeds...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28583305/immunogenicity-and-safety-of-a-new-hexavalent-vaccine-dtap5-ipv-hb-hib-administered-in-a-mixed-primary-series-schedule-with-a-pentavalent-vaccine-dtap5-ipv-hib
#5
Federico Martinón-Torres, Florence Boisnard, Stéphane Thomas, Christine Sadorge, Ray Borrow
DTaP5-IPV-HB-Hib vaccine is a fully-liquid, combination hexavalent vaccine. This phase III, open-label, multicentre study conducted in Spain, evaluated the immune response to all DTaP5-IPV-HB-Hib antigens when the vaccine was used in a mixed hexa/penta/hexa primary series. Infants (who had received one dose of hepatitis B vaccine at birth) received a mixed schedule including DTaP5-IPV-HB-Hib (PRP-OMP conjugate) at 2 and 6months of age, DTaP5-IPV-Hib at 4months, meningococcal serogroup C conjugate (MCC) vaccine at 2 and 4months, and routine rotavirus and pneumococcal vaccination...
June 2, 2017: Vaccine
https://www.readbyqxmd.com/read/28567192/rotavirus-antigen-cytokine-and-neutralising-antibody-profiles-in-sera-of-children-with-and-without-hiv-infection-in-blantyre-malawi
#6
Jennifer J Hull, Nigel Cunliffe, Khuzwayo C Jere, Sung-Sil Moon, Yuhuan Wang, Umesh Parashar, Baoming Jiang
BACKGROUND: Rotavirus and HIV infection are major causes of death among children in sub-Saharan Africa. A previous study reported no association between concomitant HIV infection and rotavirus disease severity among hospitalised children in Malawi. This study examined rotavirus antigenaemia and broader immune responses among HIV-infected and uninfected children. METHODS: Stored (-80°C), paired sera from acute and convalescent phases of Malawian children less than 5 years old, hospitalised for acute gastroenteritis in the primary study, collected from July 1997 to June 1999, were utilised...
March 2017: Malawi Medical Journal: the Journal of Medical Association of Malawi
https://www.readbyqxmd.com/read/28560356/rotavac-%C3%A2-does-not-interfere-with-the-immune-response-to-childhood-vaccines-in-indian-infants-a-randomized-placebo-controlled-trial
#7
Temsunaro Rongsen Chandola, Sunita Taneja, Nidhi Goyal, Kalpana Antony, Kiran Bhatia, Deepak More, Nita Bhandari, Iksung Cho, Krishna Mohan, Sai Prasad, Gvja Harshavardhan, Tataji Surender Rao, Sudhanshu Vrati, Maharaj Kishan Bhan
A phase III randomized double-blind placebo-controlled trial was conducted in the urban neighborhoods of Delhi to assess whether Oral Rotavirus Vaccine ROTAVAC(®) interferes with the immune response to childhood vaccines when coadministered. Infants aged 6 weeks were randomized to receive three doses of either ROTAVAC(®) or placebo along with childhood vaccines: Oral Polio Vaccine and vaccines against Diphtheria, Pertussis, Tetanus, Hepatitis B and Haemophilus influenza type b given as Pentavalent at 6, 10, 14 weeks of age...
May 2017: Heliyon
https://www.readbyqxmd.com/read/28504192/correlates-of-protection-for-enteric-vaccines
#8
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
#9
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
#10
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 d old were randomly assigned (1:1:1) to receive 3 doses of oral RV3-BB vaccine with the first dose given at 0-5 d 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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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