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Microfluidic Device for Recreating a Tumor Microenvironment in Vitro
Published on: November 20, 2011
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Constructing a Biomaterial to Simulate Extracellular Drug Transport in Solid Tumors
Sebastian G Huayamares1, Jimmy Y Song2, Aric Huang2
1Bioengineering Graduate Program, University of Kansas, Lawrence, KS, 66045, USA.
Macromolecular Bioscience
|September 14, 2020
Summary
A novel 3D hyaluronic acid hydrogel model with collagen I fibers effectively simulates tumor extracellular microenvironments. This model accurately predicts intratumoral drug retention, aiding in the development of new cancer therapies.
Area of Science:
- Biomaterials Science
- Cancer Biology
- Drug Delivery
Background:
- Developing in vitro models for screening intratumoral drugs is crucial due to advances in intratumoral therapies.
- Tumor extracellular microenvironment biophysics, particularly collagen I fiber density and stiffness, significantly impact drug retention.
- Existing models often lack the complexity to accurately represent the mechanical properties of solid tumors.
Purpose of the Study:
- To design and validate a 3D in vitro model simulating the tumor extracellular microenvironment for drug screening.
- To investigate the retention of glatiramer acetate (GA) and polyethylene glycol (PEG) in a novel hyaluronic acid (HA) hydrogel model.
- To compare in vitro hydrogel retention with ex vivo murine tumor retention data.
Main Methods:
- Fabrication of hyaluronic acid (HA) hydrogels with varying concentrations of collagen I fibers to mimic tumor stiffness.
- Rheological analysis to characterize the biomechanical properties of the hydrogel models.
- In vitro assessment of glatiramer acetate (GA) and polyethylene glycol (PEG) retention within the HA-collagen hydrogels.
- Ex vivo analysis of GA and PEG retention in murine tumors following intratumoral injection.
Main Results:
- Increased collagen I fiber density in HA hydrogels significantly enhanced their stiffness, replicating tumor biomechanics.
- Glatiramer acetate (GA) exhibited significantly longer retention in the HA-collagen hydrogels compared to polyethylene glycol (PEG).
- The in vitro retention patterns of GA and PEG in the hydrogel model closely mirrored their retention observed in ex vivo murine tumors.
Conclusions:
- Hyaluronic acid hydrogels incorporating collagen I fibers serve as effective in vitro simulators for intratumoral injection sites.
- This model accurately predicts extracellular drug transport and retention following intratumoral administration, particularly for biologic therapies.
- The developed model offers a valuable platform for screening intratumoral drug efficacy and optimizing delivery strategies.
