Project description:This SuperSeries is composed of the following subset Series: GSE21311: Maternal influences on the transmission of leukocyte gene expression profiles in population samples (Red Cross Donors) GSE21342: Maternal influences on the transmission of leukocyte gene expression profiles in population samples (mother and child) Refer to individual Series
Project description:This is a companion study to (GSE21342). Peripheral blood leukocyte samples were obtained with consent from 100 red cross blood donors sampled cross-sectionally across the city of Brisbane, Australia. After correction for RNA integrity values, individuals fall into major profiles of expression variation suggesting environmental and cultural influences on immune gene expression.
Project description:Analysis of gene expression in mouse E15.5 embryonic heart tissue, either wildtype, Ddc-/+ (maternal transmission of Ddc^Gt(OST129277)Lex knockout allele), Ddc+/- (paternal transmission), or Ddc-/-.
Project description:Intralocus sexual conflict, where males and females have different fitness optima for the same trait, has been suggested to potentially be resolved by genomic imprinting, whereby expression in offspring is altered according to parent-of-origin. However, this idea has not yet been empirically tested. Here, we designed an experimental evolution protocol in Drosophila melanogaster which enabled us to look for imprinting effects on the X-chromosome. We enforced father-to-son transmission of the X-chromosome for many generations, and compared fitness and gene expression levels between control males, males with a control X-chromosome that had undergone one generation of father-son transmission (CDX), and males with an X-chromosome that had undergone many generations of father-son transmission (MLX). Although fitness differences were consistent with lowered fitness of males with a paternally inherited X-chromosome, expression differences suggested that this was due to deleterious maternal effects rather than imprinting. We conclude that imprinting is unlikely to resolve intralocus sexual conflict in Drosophila melanogaster. 18 samples were analyzed. There were 3 replicate populations within each of 3 treatments (Control, CDX, and MLX), and two males were analyzed from each population, for a total of 18 males.
Project description:Bisulphite (BS) converted DNA from 2 paternal uniparental diploidies (pUPDs), one maternal (mUPD) and 5 control leukocytes samples were hybridized to the Infinium HumanMethylationEPIC BeadChip (Illumina), obtaining the BS DNA methylation profiles across approximately 850,000 CpGs. In addition, the 5 control leukocyte samples were also coverted using oxidative bisulphite (oxBS) treatment. The selective chemical oxidation of 5-hydroxymethylcytosine (5hmC) to 5-formylcytosine (5fC) and the deamination of the latter to uracil during the BS conversion allowed the quantification of independent 5-methylcytosine (5mC) and 5hmC methylation levels at every single CpG.
