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Different types of long-lasting stem cells are responsible for the growth and upkeep of the mammary gland.

This study reported that mammary stem cells in terminal end buds of the mammary gland primarily contribute to branching morphogenesis through dynamic positional regulation and cellular rearrangement.

This study found that β-catenin stabilization in specific mammary epithelial lineages leads to cellular changes and the formation of hyperplastic lesions, revealing its role in initiating mammary neoplastic development.

This study found that differentiated airway epithelial cells can revert into functional stem cells in vivo, suggesting a more general role for this dedifferentiation process in tissue regeneration in higher vertebrates.

This article argues that lineage labeling with genetic markers is the gold standard for identifying epithelial stem cells, contrary to the view that in vitro methods alone are sufficient.