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Updated: Feb 2, 2026
07:27
Isolation of Mammary Epithelial Cells from Three-dimensional Mixed-cell Spheroid Co-culture
Published on: April 30, 2012
16.5K
Epithelial Cell Chirality Revealed by Three-Dimensional Spontaneous Rotation.
Amanda S Chin1, Kathryn E Worley1, Poulomi Ray1,2
1Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180.
Summary
Researchers developed a novel biomaterial platform to study cell chirality, a key factor in embryonic left-right asymmetry. This system reveals actin-dependent intrinsic cell handedness and its regulation by the extracellular matrix.
Area of Science:
- Developmental Biology
- Cell Biology
- Biomaterials Science
Background:
- Understanding left-right (LR) asymmetry in embryonic development is crucial.
- Limited in vitro models exist for studying cell chirality and its role in morphogenesis.
- Confounding factors in vivo hinder the study of intrinsic cell handedness.
Purpose of the Study:
- To develop a physiologically relevant 3D platform for assessing individual cell and aggregate chirality.
- To investigate the intrinsic cellular mechanisms governing 3D chirality.
- To explore the influence of the extracellular matrix on cell polarity and chirality.
Main Methods:
- Engineered a two-layered biomaterial platform creating a defined axis for cell rotation.
- Utilized the platform to observe spontaneous clockwise or counterclockwise rotation of cells, cell aggregates, and epithelial spheroids.
- Conducted mechanistic studies involving actin dynamics and α-actinin-1 cross-linking.
Main Results:
- Demonstrated a novel biomaterial niche enabling the determination of cell chirality.
- Identified an actin-dependent, cell-intrinsic property of 3D chirality.
- Showed that extracellular matrix gradients act as biophysicochemical cues influencing cell polarity and chirality.
- Mediated cell chirality through actin cross-linking by α-actinin-1.
Conclusions:
- The developed biomaterial platform is effective for studying developmental asymmetry and cell chirality.
- Cell intrinsic handedness is an actin-dependent property regulated by extracellular matrix cues.
- This platform can be used to screen environmental factors potentially causing birth defects.
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