Project description:To investigate the effect of cigarette smoke exposure on gene expression in airway epithelial cells of Canton S Drosophila melanogaster larvae, we isolated the airways of cigarette smoke exposed larvae and air controls. We then performed gene expression profiling analysis using data obtained from RNA-seq of smoke-exposed males, smoke-exposed females, air-control males and air-control females. For each group 4 biological replicates were prepared, representing 40-50 larval airways.
Project description:We replaced the endogenous histones of Drosophila melanogaster with either histones containing an H3K9R mutation or histones containing an H4K16R mutation to interrogate established genome-wide correlations between chromatin state, transcription, and DNA replication timing. We performed total RNA-seq in H4K16R males and females to investigate the role of H4K16 in dosage compensation of the male X chromosome. We found that H4K16 directly promotes hyper-expression of the male X chromosome in Drosophila. To generate replication timing profiles, we performed Repli-seq in HWT males and females, H4K16R males and females, and H3K9R females. We found that H3K9 promotes late replication of the pericentromeric heterochromatin and H4K16 promotes early replication of the male X chromosome.
Project description:Aim: Su(H) chromatin occupancy profiling by ChIP on larval wing imaginal discs of Drosophila melanogaster to study the cooperation between Notch activation and loss of epithelial polarity (scrib mutation) during neoplastic growth. Results: The combination of Notch activation and scribble mutation (NS) does not lead to a general redeployment of Su(H) binding as compared to individual conditions (Notch only (N), and scrib mutation only (S))
Project description:RNA was extracted from adult male and adult female Drosophila melanogaster with reversed sex-chromosome parent-of-origin (e.g. maternal-X/paternal-Y vs. paternal-X/maternal-Y) Parent-of-origin effects were assayed in X/Y males, XY/Y males, and XY/X females. Direct comparisons were made between individuals with the same karyotype (e.g. X/Y males or XY/Y males) incorporating dye-swaps.
Project description:Differences in the selective pressures experienced by males and females are believed to be ubiquitous in dioecious organisms and are expected to result in the evolution of sexually antagonistic alleles, thereby driving the evolution of sexual dimorphism. Negative genetic correlation for fitness between the sexes has been documented, however, the identity, number and location of loci causing this relationship are unknown. Here we show that a large proportion of Drosophila melanogaster transcripts are associated with the interaction between genomic haplotype and gender and that at least 8% of loci in the fly genome are currently evolving under sexually antagonistic selection. We measured gene expression of adult males and females of Drosophila melanogaster from 15 hemiclone lines, showing either high-male/low-female fitness, high-female/lowmale fitness or average fitness in both sexes. Data from four replicates for each sex/line are presented, giving a total of 120 arrays.
Project description:We performed genome-wide profiling experiments on tissues from Drosophila melanogaster adult females with a mutation in the p24 gene logjam (loj) to test the hypothesis that loss of loj function causes a transcriptional response characteristic of ER stress activation. Keywords: logjam mutant compared to control
