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Expression data from cumulus cells from C57Bl/6 and Ptger2 (EP2) KO mice

ABSTRACT: To understand the role of prostaglandin (PG) receptor EP2 (Ptger2) signaling in ovulation and fertilization, we investigated time-dependent expression profiles in wild-type (WT) and Ptger2-/- cumuli before and after ovulation by using microarrays.

ORGANISM(S): Mus musculus

PROVIDER: GSE20439 | GEO | 2010/02/20

SECONDARY ACCESSION(S): PRJNA125493

REPOSITORIES: GEO

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Expression data from cumulus cells from C57Bl/6 and Ptger2 (EP2) KO mice

Project description:To understand the role of prostaglandin (PG) receptor EP2 (Ptger2) signaling in ovulation and fertilization, we investigated time-dependent expression profiles in wild-type (WT) and Ptger2-/- cumuli before and after ovulation by using microarrays. We used Affymetrix U74A ver2 microarrays to investigate gonadotropin-induced gene expression profiles in WT and EP2KO cumulus cells before and after ovulation. Immature mice were primed with pregnant mare serum gonadotropin (PMSG) as an FSH-like stimulation. The cumulus-oocyte complexes (COCs) were isolated from mice 48 h after PMSG injection (H0) and from PMSG-primed mice exposed to human chorionic gonadotropin (hCG) as an LH-like stimulation for 3, 9 or 14 h (H3, H9 or H14, respectively).

2010-03-02 | E-GEOD-20439 | biostudies-arrayexpress

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Project description:Changes of genome-wide mRNA transcription levels of human ciliary smooth muscle (hCSM) cells were determined by treating hCSM cells in culture with 200 nM of either an prostaglandin E2 receptor subtype EP2 or subtype EP4 selective agonist for 6 hours in comparison to untreated controls. This was followed by competitive hybridization of fluorescent Cy3 or Cy5 labeled cRNA probes derived from the treated versus untreated control total RNA samples onto an Agilent Human Whole Genome Expression oligonucleotide microarray. Log 2 (LN) of the intra-slide ratios (RATIO, PRE_VALUE) of treated versus untreated samples was reported as VALUE in the sample files. Keywords: prostaglandin E2 receptor agonists, subtype EP2, subtype EP4, hCSM

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Yersinia pseudotuberculosis strain:EP2/+

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Project description:Microglia, the innate immune cells of the central nervous system, perform critical inflammatory and non-inflammatory functions to maintain homeostasis and normal neural function. However in Alzheimer’s disease (AD), these beneficial functions become progressively impaired, contributing to synapse and neuron loss and cognitive impairment. The inflammatory cyclooxygenase-PGE2 pathway, including the PGE2 receptor EP2, is implicated in AD development, both in human epidemiology and in transgenic models of AD. To test the transcriptional responses of EP2-deficient microglia to Aβ in vivo, we used mice in which the EP2 receptor is conditionally deleted in microglia using the CD11b-Cre transgene and floxed alleles of the EP2 gene. By injecting these mice with Aβ ICV and isolating microglia from the brains, we have been able to establish the transcriptional response of microglia to Aβ in vivo and test how EP2 deletion in microglia affects this response. 8 month-old C57BL/6 mice, of the genotype CD11b-Cre; EP2+/+ or CD11b-Cre; EP2lox/lox, were injected I.C.V. with either Aβ or vehicle. 48 hours after injection, the mice were sacrificed and transcardially perfused with cold heparinized 0.9% NaCl. Brains were then removed from the mice and pooled, two brains of the same genotype per sample, to ensure adequate cell and RNA yield. The brains were then enzymatically dissociated for microglia isolation using the Neural Tissue Dissociation Kit (P), MACS Separation Columns (LS), and magnetic CD11b Microbeads from Miltenyi Biotec according to the manufacturer's protocol. Immediately after isolating the microglia, RNA was extracted from the cells for microarray analysis.

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