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Gene expression profiling in endometriosis and ovarian cancer

ABSTRACT: This study aimed to identify an essential gene in the malignant transformation of endometriosis to clear cell ovarian carcinoma and endometrioid ovarian carcinoma.

ORGANISM(S): Homo sapiens

PROVIDER: GSE157153 | GEO | 2021/04/01

REPOSITORIES: GEO

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Complement Roles Revealed by Immune Gene Profiling in Endometriosis and Endometriosis-Associated Ovarian Cancer

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Complement Roles Revealed by Immune Gene Profiling in Endometriosis and Endometriosis-Associated Ovarian Cancer

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2015-01-07 | E-GEOD-57545 | biostudies-arrayexpress

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Project description:Endometriosis is associated with increased risk of epithelial ovarian cancers (EOCs). Using data from large endometriosis and EOC genome-wide association meta-analyses we estimate the genetic correlation and evaluate the causal relationship between genetic liability to endometriosis and EOC histotypes, and identify shared susceptibility loci. We estimate a significant genetic correlation (rg) between endometriosis and clear cell (rg=0.71), endometrioid (rg=0.48) and high-grade serous (rg=0.19) ovarian cancer, associations supported by Mendelian randomization analyses. Bivariate meta-analysis identify 28 loci associated with both endometriosis and EOC, including 19 with evidence for a shared underlying association signal. Differences in the shared risk suggest different underlying pathways may contribute to the relationship between endometriosis and the different histotypes. Functional annotation using transcriptomic and epigenomic profiles of relevant tissues/cells highlights several target genes. This comprehensive analysis reveals profound genetic overlap between endometriosis and EOC histotypes with valuable genomic targets for understanding the biological mechanisms linking the diseases.

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Transcriptome and DNA methylation analyses highlight the role of menstrual cycle phase in tumorigenesis of endometriosis-related ovarian carcinoma histotypes [methylation]

Project description:Epithelial ovarian cancer, or ovarian carcinoma (OC), is a diverse disease. Two of the rarer subtypes, clear cell OC (CCOC) and endometrioid OC (ENOC), both arise from ovarian endometriotic cysts, particularly atypical endometriosis. CCOC and ENOC have similar mutation profiles and share a common cell of origin, but their cellular phenotypes and clinical outcomes are distinct; in particular, CCOC has poor clinical survival. The most well-known difference between the histotypes is the universal overexpression of HNF1B (Hepatocyte nuclear factor-1β) in clear cell tumors and overexpression of ESR1 in ENOC. It is not well understood how these discrete histotypes arise from the same cell of origin. Via transcriptional (n=57) and DNA methylation analysis (N=127) of these rare tumors, we show that CCOC closely resembles secretory endometrium in transcriptional profile; whereas ENOC transcriptomes resemble proliferative endometrium.

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MiR-146a-5p and miR-191-5p as novel diagnostic marker candidates for ovarian clear cell carcinoma

Project description:Ovarian cancer is a malignant gynecologic disease rarely diagnosed in the early stages. Among ovarian cancers, clear cell carcinoma has a poor prognosis due to its malignant potential. MicroRNAs (miRNAs) regulate gene expression in cells by suppressing the translation of the target gene or by degrading the target mRNA. They are also secreted from the cells in the blood, binding to the proteins or lipids and assisting in cell-cell communication. Hence, serum miRNAs can also be diagnostic biomarkers for ovarian cancer. This study investigated and identified specific miRNAs for ovarian clear cell carcinoma and compared them to those of ovarian endometrioma in healthy patients. CA125, an ovarian tumor marker, did not differ between patients with ovarian clear cell carcinoma, endometriosis, or healthy controls. Four miRNAs (miR-146a-5p, miR-191-5p, miR-484, and miR-574-3p) were analyzed. The miR-146a-5p and miR-191-5p expression levels were significantly increased in the serum samples from the patients with ovarian clear cell carcinoma compared to the healthy controls but not in the patients with endometriosis (P < 0.05). Furthermore, the bioinformatics analysis showed that CCND2 and NOTCH2 were the candidate target genes of miR 146a-5p and miR-191-5p. In conclusion, our results showed that miR 146a-5p and miR-191-5p might be useful as early and non-invasive diagnostic tools in ovarian clear cell carcinoma. These miRNAs can help in distinguishing between ovarian clear cell carcinoma and ovarian endometrioma. To the best of our knowledge, no studies have screened any candidates specifically for clear cell carcinoma.

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Transcriptomic Analyses of Ovarian Clear-Cell Carcinoma with Concurrent Endometriosis

Project description:Transcriptomic Analyses of Ovarian Clear-Cell Carcinoma with Concurrent Endometriosis

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Transcriptome-wide m6A methylome of endometrioid ovarian cancer and ovarian endometriosis

Project description:Emerging studies have revealed that N6-methyladenosine modification is involved in the development of various cancers. However, the m6A modification pattern of endometrioid ovarian cancer (EOC) has not been demonstrated. In the present study, high-throughput sequencing combined with methylated RNA immunoprecipitation (MeRIP-seq) and RNA sequencing were used to obtain the transcriptome-wide m6A modifications of endometrioid ovarian cancer for the first time.

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