Project description:Escort cells (ECs) in the Drosophila ovaries showed important functions in modulate germline cysts differentiation, as germline cysts differentiation niche, yet their subtypes and functions to germline cysts were still little known. Through single cell RNA-sequencing analysis, here we provide a comprehensive analysis of cellular diversity and functions of ECs in adult Drosophila germariums. We identify 2 EC subtypes with different gene expression and functions, further tested through EC subtypes-specific gene RNAi. Our single-cell data should greatly facilitate understanding of the functions of ECs as differentiation niche.
Project description:Drosophila ovarian Follicle Stem Cells (FSC) present an excellent paradigm for understanding how a community of active stem cells maintained by population asymmetry is regulated. Here we describe single-cell RNA sequencing studies of a pre-sorted population of cells that include FSCs and the neighboring cell types, Escort Cells (ECs) and Follicle Cells (FCs), which they support. Cell-type assignment relies on anterior-posterior (AP) location within the germarium. We clarify the previously determined location of FSCs and use spatially targeted lineage studies as further confirmation. The scRNA profiles among four clusters are consistent with an AP progression from anterior ECs through posterior ECs and then FSCs, to early FCs. Several genes with graded profiles from ECs to FCs are highlighted as candidate effectors of the inverse gradients of the two principal signaling pathways, Wnt and JAK-STAT, that guide FSC differentiation and division.
Project description:Comparison of transcript abundance between control (untreated) and methotrexate treated S3 Drosophila cells and ovaries disected from female flies. Keywords: Stress response
Project description:H3K27me3 profiles using Cleavage under targets and Release using nuclease (Cut&Run) in control and KD Drosophila melanogaster ovaries. We examined the impact on chromatin profiles in Drosophila melanogaster ovaries in which the lid, the Sin3a, the Snr1 or the mod(mdg4) gene have been selectively knocked down by tissue-specific shRNA expression. We additionally explored H3K27me3 and H3K9me3 in control and dhd mutant ovaries either carrying or not a transgene.
Project description:Comparison of transcript abundance between control (untreated) and methotrexate treated S3 Drosophila cells and ovaries disected from female flies. S3 cells were exposed to 0 or 5.2 X 10^-8 M MTX for 4 days then harvested. Flies were exposed to 0 or 5 ppm MTX for 5 days then ovaries were dissected. RNA was extracted from S3 cells and ovaries. 4 S3 microarrays with one dye-swap and 2 ovary microarrays swapping dyes were hybridized to spotted cDNA microarrays.
Project description:Purpose: To analysis Ova impact on H3K4me2 and pol II patterns in Drosophila ovaries by ChIP-seq Methods: Chromatin Immunoprecipitation to identify H3K4me2 and pol II patterns in Drosophila ovaries Results: Knockdown of Ova increases of H3K4me2 and Pol II in some genomic regions.