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• W2012545365 abstract "Endothelial Per-ARNT-Sim (PAS) domain protein-1 (EPAS-1)/hypoxia-inducible factor (HIF)-2alpha is a recently identified, endothelial-specific, hypoxia-induced transcription factor and is reputed to have an important role in tumor angiogenesis and tumor progression. Only a few studies have reported on the clinical correlation with grade, stage, necrosis, and microvessel density in transitional cell carcinoma of the bladder. In vitro studies have reported no concordance of EPAS-1/HIF-2alpha mRNA and protein expression. We sought to elucidate these two issues.Surgical specimens from 110 patients with transitional cell carcinoma comprised the study, including 51 from radical cystectomy and 59 from transurethral resection of bladder tumor. Immunohistochemistry and in situ hybridization were performed with antibodies against EPAS-1/HIF-2alpha, CD31, and a human EPAS-1/HIF-2alpha cDNA subclone probe.EPAS-1/HIF-2alpha protein expression was found almost exclusively in high-grade and high-stage tumors (P <0.0001). EPAS-1/HIF-2alpha mRNA expression was detectable only in high-grade (grade 3) and high-stage (pT3a or greater) cases with positive EPAS-1/HIF-2alpha protein expression (P = 0.0017). The presence of necrosis correlated with EPAS-1/HIF-2alpha expression, tumor grade, and tumor stage (P <0.0001). Microvessel density was much lower in invasive, larger tumor nodules in EPAS-1/HIF-2alpha-positive cases than in the negative cases (P <0.0001).EPAS-1/HIF-2alpha protein and mRNA levels correlate with higher grade and advanced bladder transitional cell carcinoma. In lower stage cases, no concordance was found between transcription and translation of EPAS-1/HIF-2alpha gene expression. Because EPAS-1/HIF-2alpha mRNA is only detectable in highly invasive cancer cases, it may serve as a therapeutic target (eg, by an antisense mRNA approach) for bladder cancer." @default.
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• W2012545365 date "2003-04-01" @default.
• W2012545365 modified "2023-09-27" @default.
• W2012545365 title "Correlation study showing no concordance between EPAS-1/HIF-2α mRNA and protein expression in transitional cellcancer of the bladder" @default.
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• W2012545365 doi "https://doi.org/10.1016/s0090-4295(02)02405-6" @default.
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