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• W2829837434 abstract "Abstract Cell-type origin is one of the factors that determine molecular features of tumors, but resources to validate this concept are scarce because of technical difficulties in propagating major cell types of adult organs. Previous attempts to generate such resources to study breast cancer have yielded predominantly basal-type cell lines. We have created a panel of immortalized cell lines from core breast biopsies of ancestry-mapped healthy women that form ductal structures similar to normal breast in 3D cultures and expressed markers of major cell types, including the luminal-differentiated cell-enriched ERα–FOXA1–GATA3 transcription factor network. We have also created cell lines from PROCR (CD201)+/EpCAM− cells that are likely the “normal” counterpart of the claudin-low subtype of breast cancers. RNA-seq and PAM50-intrinsic subtype clustering identified these cell lines as the “normal” counterparts of luminal A, basal, and normal-like subtypes and validated via immunostaining with basal-enriched KRT14 and luminal-enriched KRT19. We further characterized these cell lines by flow cytometry for distribution patterns of stem/basal, luminal-progenitor, mature/differentiated, multipotent PROCR+ cells, and organogenesis-enriched epithelial/mesenchymal hybrid cells using CD44/CD24, CD49f/EpCAM, CD271/EpCAM, CD201/EpCAM, and ALDEFLUOR assays and E-cadherin/vimentin double staining. These cell lines showed interindividual heterogeneity in stemness/differentiation capabilities and baseline activity of signaling molecules such as NF-κB, AKT2, pERK, and BRD4. These resources can be used to test the emerging concept that genetic variations in regulatory regions contribute to widespread differences in gene expression in “normal” conditions among the general population and can delineate the impact of cell-type origin on tumor progression. Significance: In addition to providing a valuable resource for the breast cancer research community to investigate cell-type origin of different subtypes of breast cancer, this study highlights interindividual differences in normal breast, emphasizing the need to use normal cells from multiple sources as controls to decipher the effects of cancer-specific genomic aberrations. Cancer Res; 78(17); 5107–23. ©2018 AACR." @default.
• W2829837434 created "2018-07-19" @default.
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• W2829837434 date "2018-09-01" @default.
• W2829837434 modified "2023-10-14" @default.
• W2829837434 title "Normal Breast-Derived Epithelial Cells with Luminal and Intrinsic Subtype-Enriched Gene Expression Document Interindividual Differences in Their Differentiation Cascade" @default.
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• W2829837434 doi "https://doi.org/10.1158/0008-5472.can-18-0509" @default.
• W2829837434 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6125218" @default.
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• W2829837434 hasPublicationYear "2018" @default.
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