Three-dimensional genome architecture coordinates key regulators of lineage specification in mammary epithelial cells
Details
Publication Year 2023-11-08,Volume 3,Issue #11,Page 100424
Journal Title
Cell Genomics
Publication Type
Research article
Abstract
Although lineage-specific genes have been identified in the mammary gland, little is known about the contribution of the 3D genome organization to gene regulation in the epithelium. Here, we describe the chromatin landscape of the three major epithelial subsets through integration of long- and short-range chromatin interactions, accessibility, histone modifications, and gene expression. While basal genes display exquisite lineage specificity via distal enhancers, luminal-specific genes show widespread promoter priming in basal cells. Cell specificity in luminal progenitors is largely mediated through extensive chromatin interactions with super-enhancers in gene-body regions in addition to interactions with polycomb silencer elements. Moreover, lineage-specific transcription factors appear to be controlled through cell-specific chromatin interactivity. Finally, chromatin accessibility rather than interactivity emerged as a defining feature of the activation of quiescent basal stem cells. This work provides a comprehensive resource for understanding the role of higher-order chromatin interactions in cell-fate specification and differentiation in the adult mouse mammary gland.
Keywords
chromatin looping; enhancer; epigenetics; mammary gland; polycomb; stem cells; transcription factors
Department(s)
Familial Cancer Centre; Medical Oncology
Open Access at Publisher's Site
https://doi.org/10.1016/j.xgen.2023.100424
Terms of Use/Rights Notice
Refer to copyright notice on published article.


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