Journal
STEM CELL REPORTS
Volume 4, Issue 4, Pages 699-711Publisher
CELL PRESS
DOI: 10.1016/j.stemcr.2015.02.013
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Funding
- Avon Foundation
- Breakthrough Breast Cancer
- Marion Burns Foundation
- Swedish Research Council
- Swedish Society for Medical Research
- Tegger Foundation
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Characterization of normal breast stem cells is important for understanding their role in breast development and in breast cancer. However, the identity of these cells is a subject of controversy and their localization in the breast epithelium is not known. In this study, we utilized a novel approach to analyze the morphogenesis of mammary lobules, by combining one-dimensional theoretical models and computer-generated 3D fractals. Comparing predictions of these models with immunohistochemical analysis of tissue sections for candidate stem cell markers, we defined distinct areas where stem cells reside in the mammary lobule. An increased representation of stem cells was found in smaller, less developed lobules compared to larger, more mature lobules, with marked differences in the gland of nulliparous versus parous women and that of BRCA1/2 mutation carriers versus non-carriers.
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