Association of MGMT promoter methylation with tumorigenesis features in patients with ovarian cancer: A systematic meta ‐analysis

Abstract BackgroundThe MGMT is a key tumor suppressor gene and aberrant promoter methylation has been reported in many cancers. However, the relationship between MGMT promoter methylation and ovarian cancer remains controversial. This meta‐analysis was first conducted to estimate the clinical significance of MGMT promoter methylation in ovarian carcinoma. MethodsLiterature search was performed in the PubMed, Embase, EBSCO and Cochrane Library databases. The pooled odds ratio (OR) and their corresponding 95% confidence interval (95% CI) were summarized. ResultsFinal 10 studies with 910 ovarian tissue samples were included in this meta‐analysis. MGMT promoter methylation was significantly higher in ovarian cancer than in normal ovarian tissues (OR = 4.13, 95% CI = 2.32–7.33, p 
Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: ORIGINAL ARTICLE Source Type: research

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ConclusionsPositive findings in abdominopelvic washing cytology is rare. The majority of the positive cases were from müllerian origins, with ovary and uterus as the most common sites. Endometrial adenocarcinoma, endometrioid type and ovarian high-grade serous carcinoma were the most common tumor types. Knowing prior history of malignancy, morphologic comparison with concurrent surgical cases, and performing ancillary studies are keys to improve diagnostic accuracy of abdominopelvic washings.
Source: Journal of the American Society of Cytopathology - Category: Cytology Source Type: research
Contributors : Antonella Ravaggi ; Renata A TassiSeries Type : Expression profiling by arrayOrganism : Homo sapiensHigh-grade serous ovarian carcinoma (HGSOC) is generally associated with a very dismal prognosis. Nevertheless, patients with similar clinicopathological characteristics can have markedly different clinical outcomes. Our aim was the identification of novel molecular determinants influencing survival.Gene expression profiles of 12 HGSOC long-term and 27 short-term survivors (training set) were generated by microarray, and a prognostic signature was identified and further evaluated on an independent extensive HG...
Source: GEO: Gene Expression Omnibus - Category: Genetics & Stem Cells Tags: Expression profiling by array Homo sapiens Source Type: research
Source: Cancer Management and Research - Category: Cancer & Oncology Tags: Cancer Management and Research Source Type: research
CONCLUSIONS: Invasive implants are heterogenous and often morphologically indistinguishable lesions with transcriptomes that may be classified as malignant or not. Additional research is needed to determine the importance of these genes as drivers and/or surrogates of malignant potential, and their utility for triaging invasive implants. PMID: 31711656 [PubMed - as supplied by publisher]
Source: Gynecologic Oncology - Category: Cancer & Oncology Authors: Tags: Gynecol Oncol Source Type: research
n Buckanovich : Most high‐grade serous ovarian cancers (HGSCs) initiate from the fallopian tube epithelium and then metastasize to the ovary and throughout the abdomen. Genomic analyses suggest that most HGSCs seed the ovary prior to abdominal dissemination. Similarly, animal models support a critical role for the ovary in driving abdominal dissemination. Thus, HGSC cell recruitment to the ovary appears to be a critical component of HGSC cell metastasis. We sought to identify factors driving HGSC recruitment to the ovary. We identified CD105 (endoglin, or ENG, a TGF‐ receptor family member) as a mediator of H...
Source: Cancers - Category: Cancer & Oncology Authors: Tags: Article Source Type: research
High-grade serous ovarian carcinoma (HGSOC) is the most prevalent and malignant ovarian tumor. To identify co-expression modules and hub genes correlated with platinum-based chemotherapy resistant and sensitive HGSOC, we performed weighted gene co-expression network analysis (WGCNA) on microarray data of HGSOC with 12 resistant samples and 16 sensitive samples of GSE51373 dataset. A total of 5122 genes were included in WGCNA, and 16 modules were identified. Module-trait analysis identified that the module salmon (cor = 0.50), magenta (cor = 0.49), and black (cor = 0.45) were discovered associated with chemoth...
Source: Medicine - Category: Internal Medicine Tags: Research Article: Quality Improvement Study Source Type: research
A central reason behind the poor clinical outcome of patients with high-grade serous carcinoma (HGSC) of the ovary is the difficulty in reliably detecting early occurrence or recurrence of this malignancy. Biomarkers that provide reliable diagnosis of this disease are therefore urgently needed. Systematic proteomic methods that identify HGSC-associated molecules may provide such biomarkers. We applied the antibody-based proximity extension assay (PEA) platform (Olink) for the identification of proteins that are upregulated in the plasma of OC patients. Using binders targeting 368 different plasma proteins, we compared 20 p...
Source: Frontiers in Oncology - Category: Cancer & Oncology Source Type: research
Authors: Gutkin DW, Shurin MR, El Azher MA, Shurin GV, Velikokhatnaya L, Prosser D, Shin N, Modugno F, Stemmer P, Elishaev E, Lokshin A Abstract Ovarian cancer is the leading cause of death among gynecologic diseases in the USA and Europe. High-grade serous carcinoma (HGSC) of the ovary, the most aggressive type of ovarian cancer, is typically diagnosed at advanced stages when the 5-year survival is dismal. Since the cure rate for stage I HGSC is high, early detection of localized initial disease may improve patient outcomes. Serous tubal intraepithelial carcinoma (STIC) is considered to be a precursor lesion of HG...
Source: Cancer Biomarkers - Category: Cancer & Oncology Tags: Cancer Biomark Source Type: research
High-grade serous ovarian cancer (HGSC), the most common ovarian carcinoma type, is associated with the highest mortality rate among all gynecological malignancies. As chemoresistance has been demonstrated as ...
Source: Clinical and Translational Medicine - Category: Internal Medicine Authors: Tags: Research Source Type: research
Conclusion: In our series, most synchronous/metachronous LCs and OCs showed genetic alterations. Further analyses with wide NGS panel could shed light on the biological mechanisms driving their occurrence.
Source: In Vivo - Category: Research Authors: Tags: Clinical Studies Source Type: research
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