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RNA recovery from specimens of duct-washing cytology performed contemporaneously with mammary ductoscopy. | LitMetric

AI Article Synopsis

Article Abstract

Objective: Conventional cytological diagnosis including duct-washing cytology (DWC) is sometimes performed using ductal epithelial cells collected during mammary ductoscopy; it is useful for detection of early-stage breast cancer such as ductal carcinoma in situ (DCIS). However, conventional cytological diagnosis focuses exclusively on cellular morphology; false negatives and false positives may be caused by inadequate specimen preparation (triggering cell degeneration) or poor examiner diagnostic skills. Molecular diagnosis using RNA biomarkers is expected to compensate for the weaknesses of cytological diagnosis. We previously employed microarray analysis to identify highly expressed genes in DCIS, suggesting that they may be useful for DCIS diagnosis. Here, we explored whether DWC samples yielded RNA of sufficient quantity and quality for RNA biomarker-based diagnosis.

Results: We extracted RNAs from 37 DWC samples. RNA from 12 samples exhibited RNA integrities of  ≥ 6, indicative of moderate-to-high quality. We then showed that cocaine and amphetamine regulated transcript prepropeptide (CARTPT) and breast cancer-associated transcript 54 (BRCAT54) mRNA-previously shown by microarray analysis to be highly expressed in DCIS-were detectable in these samples. Therefore, DWC samples may be useful for molecular diagnosis involving RNA biomarkers.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8830173PMC
http://dx.doi.org/10.1186/s13104-022-05928-1DOI Listing

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