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Cytokeratin 5 determines maturation of the mammary myoepithelium
- Source :
- iScience, iScience, Vol 24, Iss 5, Pp 102413-(2021)
- Publication Year :
- 2020
-
Abstract
- Summary At invasion, transformed mammary epithelial cells expand into the stroma through a disrupted myoepithelial (ME) cell layer and basement membrane (BM). The intact ME cell layer has thus been suggested to act as a barrier against invasion. Here, we investigate the mechanisms behind the disruption of ME cell layer. We show that the expression of basal/ME proteins CK5, CK14, and α-SMA altered along increasing grade of malignancy, and their loss affected the maintenance of organotypic 3D mammary architecture. Furthermore, our data suggests that loss of CK5 prior to invasive stage causes decreased levels of Zinc finger protein SNAI2 (SLUG), a key regulator of the mammary epithelial cell lineage determination. Consequently, a differentiation bias toward luminal epithelial cell type was detected with loss of mature, α-SMA-expressing ME cells and reduced deposition of basement membrane protein laminin-5. Therefore, our data discloses the central role of CK5 in mammary epithelial differentiation and maintenance of normal ME layer.<br />Graphical abstract<br />Highlights • Cytokeratin 5 (CK5) impacts mammary epithelial cell lineage differentiation • CK5 loss at pre-invasive stage causes impaired maturation of myoepithelial cells • CK5 loss causes SLUG downregulation and differentiation bias in mammary progenitors<br />Cell Biology; Developmental Biology; Biophysics
- Subjects :
- EXPRESSION
0301 basic medicine
Science
Biophysics
TRANSITIONS
02 engineering and technology
413 Veterinary science
Article
PHENOTYPIC ALTERATIONS
03 medical and health sciences
Cytokeratin
Stroma
medicine
Progenitor cell
HUMAN BREAST
Basement membrane
318 Medical biotechnology
Multidisciplinary
PROGENITORS
Chemistry
IN-SITU
Myoepithelial cell
Cell Biology
021001 nanoscience & nanotechnology
CANCER
Epithelium
3. Good health
Cell biology
SELF-RENEWAL
SNAI2
030104 developmental biology
medicine.anatomical_structure
Stem cell
DUCTAL CARCINOMA
0210 nano-technology
STEM-CELLS
Developmental Biology
Subjects
Details
- ISSN :
- 25890042
- Volume :
- 24
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- iScience
- Accession number :
- edsair.doi.dedup.....d8f576b1be46fd0daf6c170e880c36a6