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PROVIDER: PRJNA588048 | ENA |
REPOSITORIES: ENA
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Project description:Impact of maternal antibodies and infant gut microbiota on the immunogenicity of rotavirus vaccines in African, Indian and European infants: a prospective cohort study
| PRJEB38948 | ENA
Project description:<p>The PROVIDE study (Dhaka, Bangladesh) is a randomized clinical trial platform which evaluated the efficacy of delayed-dose oral rotavirus vaccine as well as the benefit of an injectable polio vaccine replacing one dose of oral polio vaccine. This rigorous infrastructure supported the additional examination of hypotheses of vaccine underperformance. Primary and secondary efficacy and immunogenicity measures for rotavirus and polio vaccines were measured, as well as the impact of maternal and childhood malnutrition, environmental enteropathy, and additional exploratory variables.</p> <p>This study has been conducted to test the role of epigenetics in malnutrition, specifically the genome-wide role of histone modifications, which are known to provide a precise signature of metabolic state and immune system function.</p>
| phs001073 | dbGaP
Project description:<p><b>NIH birth cohort study</b><br/> Amebiasis is a common cause of diarrhea and is associated with malnutrition in grade-school aged children in an urban slum of Dhaka, Bangladesh. Field Studies of Human Immunity to Amebiasis in Bangladesh was designed to determine the contribution of amebiasis to illness in the first 2 years of life when most deaths due to diarrhea occur, and understand the immunologic and genetic factors that protect children from amebiasis.</p> <p>The hypothesis underlying the study is that susceptibility to amebiasis is determined by host innate and acquired immune responses that vary between individuals in part due to: human genetic polymorphisms; environmental influences including malnutrition and concurrent geohelminth infection; and virulence differences among Entamoeba histolytica genotypes.</p> <p>Specific aims proposed in the design of the study were to:<br/> a) Measure the incidence of amebiasis and correlate it with human and parasite genetic polymorphisms, immune responses, and environmental factors such as geohelminth infection and malnutrition;<br/> b) Test the hypothesis that protective immunity is mediated both by innate immune responses initiated via TLR stimulation as well as by mucosal IgA against the Gal/GalNAc lectin and systemic IFN-γ;<br/> c) Test for the association of common genetic polymorphisms in host innate and acquired immune genes with incidence of amebiasis. </p> <p>629 newborn babies were enrolled and followed regularly through bi-weekly surveillance for diarrheal episodes, anthropometry at 3-month interval until 60 months of age.</p> <p>The infants that were consented for GWAS analysis were genotyped in 3 separate batches at different times, on 3 different arrays. Quality control was performed on the 3 separate data sets and then jointly after merging.</p> <p>Genetic data available on 447 infants together with their phenotype data is made available in this submission</p> <p><b>PROVIDE</b> (<b>P</b>erformance of <b>R</b>otavirus and <b>O</b>ral <b>P</b>olio <b>V</b>accines <b>i</b>n <b>De</b>veloping Countries) <b>Study</b><br/> Oral polio and rotavirus vaccines are significantly less effective in children living in the developing world. Environmental enteropathy, which is associated with intestinal inflammation, decreased absorption and increased permeability, may contribute substantially to oral vaccine failure in developing country settings. The primary objective of the study was to determine the association of environmental enteropathy with the efficacy of oral polio and rotavirus vaccines in children in Bangladesh. Secondary and exploratory objectives were designed to address other possible causes of oral vaccine underperformance including malnutrition, interference with maternal or breastmilk antibodies, changes in gut microbiota, and genetic susceptibility. </p> <p>The PROVIDE study was structured as a 2x2 clinical trial with a prospective birth cohort enrollment of 700 infants and their mothers in the urban slum of Mirpur, Dhaka, Bangladesh. All children received the full series of Bangladesh's Expanded Program on Immunization vaccines, including oral polio vaccine (OPV) and followed for their first 2 years of life. Half the children were randomized to receive an inactivated polio vaccine (IPV) for their 4th dose at 39 weeks instead of the standard OPV dose. In the other trial, half the infants received the 2-dose rotavirus vaccine (Rotarix) with delayed dosing at 10 and 17 weeks of age.</p> <p>A detailed description of the study design and procedures can be obtained from PROVIDE methods publication: Kirkpatrick B.D., Colgate R.E., Mychaleckyj J.C., Haque R., Dorothy D.M., Carmolli M.P., et al. (2015) Am J Trop Med Hyg 92, 744-751</p> <p>The Poliovirus trial and results are described in Mychaleckyj et al, Vaccine 2016</p> <p>The Rotavirus trial and results are described in Colgate et al, Clin Infect Dis 2016</p> <p>The PROVIDE infants were genotyped on a custom Affymetrix Axiom array (30K SNPs) at the University of Virginia Center for Public Health Genomics; and on a pre-production version of the Illumina MEGA v2 chip at the Wellcome Trust Sanger Institute, UK. The latter genotyping was performed under the auspices of the VaccGene Consortium. Analyses are ongoing to identify variants associated with the included phenotypes. A manuscript describing the genotyping methods and analysis is in preparation for the initial phenotypes.</p> <p><b>The Infection Malnutrition Bangladesh Cohort is utilized in the following dbGaP sub-studies.</b> To view genotypes, other molecular data, and derived variables collected in these sub-studies, please click on the following sub-studies below or in the "Sub-studies" box located on the right hand side of this top-level study page <a href="study.cgi?study_id=phs001475">phs001475</a> Infection Malnutrition Bangladesh Cohort. <ul> <li><a href="study.cgi?study_id=phs001476">phs001476</a> Amebiasis Immunity</li> <li><a href="study.cgi?study_id=phs001478">phs001478</a> Polio Rotavirus Vaccines</li> <li><a href="study.cgi?study_id=phs001665">phs001665</a> Cryptosporidiosis Enteropathogens</li> </ul> </p>
| phs001475 | dbGaP
Project description:While preventing vertical HIV transmission has been very successful, HIV-exposed uninfected infants (iHEU) experience an elevated risk to infections compared to HIV-unexposed and uninfected infants (iHUU). Here we present a longitudinal multimodal analysis of infant immune ontogeny that highlights the impact of HIV/ARV exposure. Using mass cytometry, we show alterations in T cell memory differentiation between iHEU and iHUU being significant from week 15 of life. The altered memory T cell differentiation in iHEU was preceded by lower TCR Vβ clonotypic diversity and linked to TCR clonal depletion within the naïve T cell compartment. Compared to iHUU, iHEU had elevated CD56loCD16loPerforin+CD38+CD45RA+FcεRIγ+ NK cells at 1 month postpartum and whose abundance pre-vaccination were predictive of vaccine-induced pertussis and rotavirus antibody responses post 3 months of life. Collectively, HIV/ARV exposure disrupted the trajectory of innate and adaptive immunity from birth which may underlie relative vulnerability to infections in iHEU.
2024-02-23 | GSE256410 | GEO
Project description:Control of pertussis depends on primary vaccination of infants in combination with booster vaccination of children, adults, and recently also pregnant women. Tetanus-diptheria-acellular pertussis (Tdap) booster vaccines are frequently given in many countries and can be formulated with inactivated poliovirus (Tdap-IPV). Although Tdap-IPV provides clinical protection, both pertussis antibody levels and clinical protection decay shortly after vaccination. This highlights the need for a better understanding of the mechanisms of immunogenicity of aP-containing combination vaccines, which may explain the longevity of the antibody response to vaccination. In order to identify immune signatures that are induced by Tdap-IPV vaccination and which can be associated with humoral responses, we analyzed changes in gene expression.
2024-01-22 | GSE233855 | GEO
Project description:Control of pertussis depends on primary vaccination of infants in combination with booster vaccination of children, adults, and recently also pregnant women. Tetanus-diptheria-acellular pertussis (Tdap) booster vaccines are frequently given in many countries and can be formulated with inactivated poliovirus (Tdap-IPV). Although Tdap-IPV provides clinical protection, pertussis antibody levels decay shortly after vaccination. This highlights the need for a better understanding of the mechanisms of immunogenicity of aP-containing combination vaccines, which may explain the longevity of the antibody response to vaccination. In order to identify immune signatures that are induced by Tdap-IPV vaccination and which may be associated with humoral responses, we analyzed changes in gene expression.
2024-01-22 | GSE195626 | GEO
Project description:Control of pertussis depends on primary vaccination of infants in combination with booster vaccination of children, adults, and recently also pregnant women. Tetanus-diptheria-acellular pertussis (Tdap) booster vaccines are frequently given in many countries and can be formulated with inactivated poliovirus (Tdap-IPV). Although Tdap-IPV provides clinical protection, both pertussis antibody levels and clinical protection decay shortly after vaccination. This highlights the need for a better understanding of the mechanisms of immunogenicity of aP-containing combination vaccines, which may explain the longevity of the antibody response to vaccination. In order to identify immune signatures that are induced by Tdap-IPV vaccination and which can be associated with humoral responses, we analyzed changes in gene expression.
2024-01-22 | GSE195625 | GEO
Project description:Rotavirus Vaccine Immunogenicity (RoVI) shotgun metagenomics
| PRJEB62041 | ENA
Project description:Prenatal exposures such as infections and immunisation may influence infant responses. We had an opportunity to undertake an analysis of responses in infants within the context of a study investigating the effects of maternal mycobacterial exposures and infection on bacille Calmette-Guerin (BCG) vaccine-induced responses in Ugandan infants. Gene expression profiles for pathways associated with maternal LTBI and with maternal BCG scar were examined using samples collected at one (n=42) and six (n=51) weeks after BCG immunisation using microarray. Interferon and inflammation response pathways were up-regulated in infants of mothers with LTBI at six weeks, and in infants of mothers with a BCG scar at one and six weeks after BCG immunisation. Maternal BCG scar had a stronger association with infant responses than maternal LTBI, with an increased proinflammatory immune profile.
2016-10-12 | GSE87801 | GEO
Project description:We combined genome-wide DNA methylation profiling of buccal cells from 47 full-term one-week old infants with accurate measurements of infant fat mass and fat-free mass using air-displacement plethysmography and found no significant a between DNA methylation and infant body composition
2020-11-11 | E-MTAB-9596 | biostudies-arrayexpress