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Differentiation of Mouse Breast Epithelial HC11 and EpH4 Cells
Published on: February 27, 2020
Angiotensin modulates human mammary epithelial cell motility
Agnieszka Wanda Piastowska-Ciesielska1, Kamila Domińska2, Magdalena Nowakowska3
1Department of Comparative Endocrinology, Faculty of Biomedical Sciences and Postgraduate Training, Medical University of Lodz, Poland agnieszka.piastowska@umed.lodz.pl.
Journal of the Renin-Angiotensin-Aldosterone System : JRAAS
|February 8, 2013
Summary
Angiotensin II enhances human mammary epithelial cell motility and matrix metalloproteinase-2 secretion, primarily mediated through the angiotensin type 1 receptor (AT1-R). This peptide influences cell behavior and tissue remodeling processes.
Area of Science:
- Cell Biology
- Endocrinology
- Molecular Biology
Background:
- Angiotensin II is a key peptide regulating vascular tone and tissue remodeling.
- Postlactational mammary gland involution involves matrix metalloproteinase (MMP) activity and bioactive fragment release, potentially modulated by Angiotensin II.
- Human mammary epithelial cells (184A1) are a relevant model for studying peptide effects on breast tissue.
Purpose of the Study:
- To investigate the impact of Angiotensin II on the proliferation, viability, and motility of normal human mammary epithelial cells (184A1).
- To elucidate the specific role of Angiotensin II receptors in mediating these cellular responses.
- To understand Angiotensin II's influence on matrix metalloproteinase expression and activity in mammary epithelial cells.
Main Methods:
- Gene expression analysis using real-time RT-PCR and Western blot to assess Angiotensin II receptor and MMP expression.
- Cell viability and proliferation assays (WST-1, AlamarBlue, BrdU) to quantify cellular responses to Angiotensin II.
- In vitro migration and invasion assays (Boyden chamber, wound healing) to evaluate cell motility and adhesion changes.
Main Results:
- Angiotensin II significantly increased 184A1 cell motility and wound closure capacity.
- Observed modifications in cell-substrate adhesion systems and enhanced secretion and activity of matrix metalloproteinases (MMPs).
- The effects of Angiotensin II were blocked by candesartan and losartan, specific inhibitors of the Angiotensin Type 1 Receptor (AT1-R).
Conclusions:
- Angiotensin II modulates human mammary epithelial cell behavior, including motility and proliferation.
- The AT1-R is the primary receptor mediating Angiotensin II's effects on these cells.
- Angiotensin II stimulates the secretion of MMP-2 by human mammary epithelial cells, suggesting a role in tissue remodeling.
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