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Asymmetrically functional surface properties on biocompatible phospholipid polymer membrane for bioartificial kidney
Hideto Ueda1, Junji Watanabe, Tomohiro Konno
1Department of Materials Engineering, School of Engineering, The University of Tokyo, 7-3-1, Hongo, Tokyo 113-8656, Japan.
Journal of Biomedical Materials Research. Part A
|December 14, 2005
Summary
A novel polysulfone membrane blended with MPC polymer shows promise for bioartificial kidneys. Its unique surface properties offer excellent hemocompatibility and cytocompatibility for renal tubule devices.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Nephrology
Background:
- Developing functional bioartificial kidneys is crucial for treating end-stage renal disease.
- Existing dialysis technologies face limitations in mimicking natural kidney functions.
- Bio-hybrid approaches integrating engineered materials with cells offer a promising alternative.
Purpose of the Study:
- To create a polysulfone (PSf) membrane blended with 2-methacryloyloxyethyl phosphorylcholine (MPC) polymer for bioartificial kidney applications.
- To evaluate the hemocompatibility and cytocompatibility of the prepared membrane for renal tubule device development.
Main Methods:
- Preparation of a porous polysulfone membrane (PSM) blended with 1 wt% MPC polymer using phase inversion (dry-wet process).
- Characterization of membrane surface properties, including pore size and MPC unit composition.
- Assessment of protein adsorption and platelet adhesion on different membrane surfaces.
- Evaluation of renal tubule epithelial cell adhesion and proliferation on the membrane.
Main Results:
- The PSM exhibited asymmetrical surface properties with distinct pore structures and MPC compositions on different sides.
- The skin layer showed suppressed protein adsorption and platelet adhesion compared to the sponge layer.
- Moderate protein adsorption on the skin layer facilitated renal tubule epithelial cell adhesion and proliferation.
- The membrane demonstrated sufficient cytocompatibility, enabling it to function as a renal tubule.
Conclusions:
- The PSM, with its balanced hemocompatibility and cytocompatibility, is a suitable material for renal tubule devices in bioartificial kidneys.
- The asymmetrical surface properties, particularly on the skin layer, are key to its functional performance.
- This engineered membrane represents a significant advancement in the development of functional bioartificial kidneys.