Unknown,Transcriptomics,Genomics,Proteomics

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Baseline expression of symptomatic and asymptomatic subjects after YF17D vaccination in Trial 2

ABSTRACT: This study investigates how the baseline expression level of genes impact symptomatic outcome of flaviviral infection. Before given the YF17D vaccine, whole blood was extracted into tempus tubes from vaccinated subjects. Thereafter, the subjects were assessed if they experienced adverse events (or symptoms). 35 subjects (n=12 symptomatic, n=23 asymptomatic) were processed according to manufacturer's protocol. Transcript expression was then evaluated by nCounter RNA Cancer Metabolism (#VRXC-CM1-12) or a custom Unfolded Protein Response codeset and its respective probesets.

ORGANISM(S): Homo sapiens

SUBMITTER: Kuan Rong Chan

PROVIDER: E-MTAB-7931 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Project description:The effect of pre and periconceptional multiple micronutrient supplementation on methylation of CpG loci within CpG islands associated with 14,000 genes across the human genome has been investigated in the offspring of a cohort of Gambian women participating in a controlled double blinded trial. Methylation levels in placebo and micronutrient supplemented cohorts were compared in genomic DNA from cord blood (35 placebo and 21 micronutrient supplemented) and in circulating blood samples (14 placebo and 9 micronutrient supplemented) drawn from the same cohort at 9 months old. A small number of differentially methylated CpG loci were identified in cord blood (14 in males and 21 in females) and a larger number in the 9 month infant comparison (108 in males and 106 in females). Seven differentially methylated loci in males and 8 in females persisted from cord to infant. These findings indicate that micronutrient supplementation pre-conception or early in embryonic development is potentially associated with programming of gene activity at birth, which is maintained into early infanthood. Strikingly, the loci affected by micronutrient supplementation differed between males and females, with no shared changes in cord blood and only 5 shared changes at 9 months. Additionally, a large number of CpG loci showed variation in methylation level when comparing 9-month samples to cord blood samples. These postnatal changes were more consistent between sexes, with 85% of female alterations being found as a subset of male changes in the placebo cohort and 62% of the female changes shared with males in the supplemented cohort. Taken together, the results suggest that there is a core developmental program shared between the sexes that is unaffected by nutrient supplementation, but that there are also sex-specific developmental changes which are altered under conditions of micronutrient supplementation and deficiency. Bisulphite converted DNA from 59 cord (36 placebo and 23 treated) and 25 infant peripheral blood (15 placebo and 10 treated) samples were hybridised to the Illumina Infinium 27k Human Methylation Beadchip v1.2. (For further analysis, five were excluded during quality control leaving 56 cord (35 placebo and 21 treated) and 23 infant peripheral blood (14 placebo and 9 treated) samples. Full data set of 84 samples were submitted to GEO)

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Baseline expression of symptomatic and asymptomatic subjects after YF17D vaccination in Trial 2

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