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Longitudinal Morphological and Physiological Monitoring of Three-dimensional Tumor Spheroids Using Optical Coherence Tomography
Published on: February 9, 2019
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Controlling cellular packing and hypoxia in 3D tumor spheroids via DNA interactions
Sven A Saemundsson1, Shane D Curry1, Bryce M Bower1
1Department of Chemical and Biological Engineering, University of Colorado, Boulder, 596 UCB, Boulder, CO, 80303, USA. Jennifer.Cha@colorado.edu.
Biomaterials Science
|August 13, 2024
Summary
Modifying cancer cell surfaces with DNA of varying lengths impacts spheroid structure. Longer DNA strands reduced hypoxia, suggesting improved intercellular spacing for potential cancer therapy insights.
Area of Science:
- Biomedical Engineering
- Cancer Biology
- Biotechnology
Background:
- Tumor spheroids are crucial in vitro models for cancer research.
- Understanding spheroid microenvironment modulation is key for effective cancer therapies.
- DNA modification of cell surfaces offers a novel approach to engineer spheroid characteristics.
Purpose of the Study:
- To investigate how DNA-modified cell surfaces affect 4T1 breast cancer spheroid formation.
- To analyze the impact of DNA length on cellular adhesion molecule expression.
- To determine the influence of DNA modification on spheroid hypoxia levels.
Main Methods:
- Utilized 4T1 mouse breast cancer cells.
- Modified cell surfaces with biotinylated DNA strands of varying lengths.
- Assessed spheroid formation, fibronectin and e-cadherin expression, and hypoxia via experimentation.
Main Results:
- Spheroid formation was facilitated by DNA surface modification.
- Expression of fibronectin and e-cadherin remained largely unchanged.
- Increased DNA length correlated with decreased spheroid hypoxia, suggesting enhanced porosity.
Conclusions:
- DNA modification of cell surfaces can engineer tumor spheroid architecture.
- Altering intercellular spacing via DNA length influences the tumor microenvironment.
- These findings offer potential strategies for enhancing cancer treatment efficacy.
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