Normal Breast-Derived Epithelial Cells with Luminal and Intrinsic Subtype-Enriched Gene Expression Document Interindividual Differences in Their Differentiation Cascade.

Cancer Research
Brijesh KumarHarikrishna Nakshatri

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 epitheli...Continue Reading

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Citations

Apr 7, 2020·Nature Communications·Jennifer M RosenbluthJoan S Brugge
Apr 21, 2020·Journal of the American College of Surgeons·Rebecca C DirksHarikrishna Nakshatri
Apr 13, 2021·JCSM Rapid Communications·Ruizhong WangHarikrishna Nakshatri
Aug 29, 2021·Breast Cancer Research and Treatment·Maryam AlthobitiEmad A Rakha

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