Transcription profile of K-ras activated murine menstruating uteri
Ontology highlight
ABSTRACT: The expression of K-ras transgene is induced in K-rasV12+/-/Cre+/+/ROSA26R-LacZ+/+ transgenic mice uteri, which were primed with hormone treatment. Decidualization was artificially induced in these uteri and hormone injection was withdrawn to induced menstruation-like endometrial degeneration. Microarray was then used to study the molecular changes in these menstruating uteri following the K-ras activation. Uterine tissues were collected from K-ras induced and littermate controled menstruating uteri. Experiments were carried out using Illumina Mouse WG-6 BeadChips (n=6 in each group). Data were normalized in R environment using the Lumi Bioconductor package.
Project description:A murine model that mimic the decidualization and regression observed in human was used to investigate the molecular mechanisms underlying the dynamic processes in endometrium. Ovariectomized mice were treated sequentially with steroid hormones and then, to induce decidualization, oil was injected into the uterine lumen. A process similar to menstruation was induced by hormone-withdrawal. The uterine tissues were collected at 4 time-points after the induction of decidualization. Experiment Overall Design: The uterine tissues were collected at 36 (T1), 48 (T2), 60 (T3) and 84 hours (T4) after the last progesterone injection. There are 4 experimental animals for each time-point, and the RNAs collected from animals within the same time-point group were pooled together for Affymetrix microarray analysis using U74Av2 Chips.
Project description:Primary intestinal epithelial cells were isolated from the proximal part of the small intestine from either E16.5 foetal tissue or adult tissue and embedded in matrigel for culturing in in advanced F12/DMEM supplemented with EGF, R-spondin and Noggin. RNA was extracted from cultures established from independent animals and subjected to expression profiling.
Project description:Expression profiling array of Lrig1 expressing and non-expressing cells isolated by flow cytometry from the intestinal epithelium of Lrig1:eGFPiresCreERT2 (Lrig1 KI) animals.
Project description:Long-term tissue homeostasis is governed by balanced contribution from adult stem cells. We recently identified Lrig1 as a marker of stem cells in mouse epidermis. Here, we show that Lrig1 expressing cells are molecularly and functionally distinct from previously characterized epidermal stem cell populations. During steady state homeostasis, Lrig1 expressing cells are responsible for the maintenance of the uppermost compartment of the pilosebaceous unit known as the infundibulum. Lineage tracing demonstrates that the epidermis is divided into discrete compartments during homeostasis, each maintained by its own resident stem cells. Compartment boundaries are rapidly broken when stem cell progeny are recruited to sites of injury, where they subsequently change behavior according to the environment. Oncogene activation in Lrig1 expressing cells alters proliferation but auxiliary stimuli are required for rapid tumor growth. Our data demonstrate that stem cell niches are compartmentalized according to altering requirements for tissue replenishment.
Project description:Transcriptional profiling of hESCs in chemically-defined culture media compared to hESCs differentiated for 36h in the additional presence of FGF, LY294002 and either BMP or ActivinA.
Project description:Genome-wide expression analysis was performed with the aim of investigating transcriptional changes mediated by the transcription factor B lymphocyte-induced maturation protein-1 (Blimp1) in the context of pluripotent embryonic cells, with the aim of drawing parallels to its functions in mouse primordial germ cells.
Project description:Transcriptional profiling of H9 human embryonic stem cells differentiated towards early endoderm over 72 hours in chemically defined media.
Project description:Gene expression profiling experiment to identify genes up and down regulated by the presence of Activin during pancreatic specification.