Single cell RNA-seq data for mouse fallopian tube and ovary
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA800047 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR17720393.fastq.gz | Fastqsanger.gz |
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Project description:Microarrays were used to examine gene expression changes that may be present in the fallopian tube epithelium of morphologically normal BRCA1 mutation positive and negative subjects. Fallopian tube epithelia has been implicated as an early point of origin for serous carcninoma. By examining the early events present in the microenvironment of this tissue between BRCA1 mutation carriers and non-carriers, we hoped to elucidate mechanisms that may lead to the development of epithelial ovarian cancer. Laser microcapture of samples from 12 BRCA1 mutation carriers and 12 non-mutation subjects was performed. Samples were further grouped according to menstrual cycle.
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Project description:Characterization of the protein composition of the extracellular matrix (ECM) of normal human Fallopian tube samples.
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Project description:The fallopian tube transports the gametes to the fertilization site and delivers the embryo to the uterus at the optimal time for implantation. Progesterone and the classical progesterone receptor (PGR) are known to be involved in regulating both tubal ciliary beating and muscular contractions, possibly involving both genomic and non-genomic actions. To provide more clues on the mechanisms involved, we investigated the effect of progesterone on gene expression in mice fallopian tubes in vitro at early (20 min) and later (2 h, 8 h) time-points using microarray and/or quantitative PCR. In parallel, oocyte cumulus complex transport was investigated in ovulating mice injected with one of the PGR antagonists, Org 31710 or CDB2194. Microarray analyses did not reveal any apparently regulated genes 20 min after progesterone treatment, in agreement with a proposed non-genomic action of progesterone controlling ciliary beating. After 2 h, 11 genes were significantly up-regulated. Analyses by quantitative PCR at 2 h and 8 h showed a consistent up-regulation of endothelin 1 (Edn1) and a down-regulation of its receptor Ednra by progesterone. We also show that treatment with progesterone receptor antagonist before ovulation accelerates the transport of the oocyte cumulus complex. This is the first study showing that progesterone regulates Edn1 and Ednra in the fallopian tube. Together with previous studies on endothelin-mediated effects on muscular contractions in the fallopian tube, the results from this study suggest that endothelin is a mediator of the progesterone-controlled effects on muscular contraction, and eventually gamete transport, in the fallopian tube. 16 pooled samples from mice fallopian tubes were exposed in vitro to progesterone for up to 2 hours.
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Project description:Recent evidence suggests that ovarian high-grade serous carcinoma (HGSC) originates from the epithelium of the fallopian tube. However, most mouse models are based on the previous prevailing view that ovarian cancer develops from the transformation of the ovarian surface epithelium. Here, we report the extensive histological and molecular characterization of the mogp-TAg transgenic mouse, which expresses the SV40 large T-antigen (TAg) under the control of the mouse müllerian-specific Ovgp-1 promoter. Histologic analysis of the fallopian tubes of mogp-TAg mice identified a variety of neoplastic lesions analogous to those described as precursors to ovarian HGSC. We identified areas of normal appearing p53-positive epithelium that are similar to “p53 signatures” in the human fallopian tube. More advanced proliferative lesions with nuclear atypia and epithelial stratification were also identified that were morphologically and immunohistochemically reminiscent of human serous tubal intraepithelial carcinoma (STIC), a potential precursor of ovarian HGSC. Beside these noninvasive precursor lesions, we also identified invasive adenocarcinoma in the ovary of 56% of the mice. Microarray analysis revealed several genes differentially expressed between the fallopian tube of mogp-TAg and WT C57BL/6. One of these genes, Top2a, which encodes topoisomerase II-alpha, was shown by immunohistochemistry to be concurrently expressed with elevated p53 and specifically elevated in mouse STICs, but not in surrounding tissues. TOP2A protein was also found elevated in human STICs, low-grade, and high-grade serous carcinoma. The mouse model reported here displays a progression from normal tubal epithelium to invasive HGSC in the ovary, and therefore closely simulates the current emerging model of human ovarian HGSC pathogenesis. This mouse therefore has the potential to be a very useful new model for elucidating the mechanisms of serous ovarian tumorigenesis, as well as for developing novel approaches for the prevention, diagnosis, and therapy of this disease. Keywords: transgenic mouse model, ovarian cancer, fallopian tube, intraepithelial carcinoma 6 mouse fallopian tubes (FT) were analyzed with experimental repeats; 3 wildtype C57BL6 mice (FT) and 3 transgenic mogp-TAg (FT), with one set of each at 7, 8 and 9 weeks of age.
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