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Proteins combination on PHBV microsphere scaffold to regulate Hep3B cells activity and functionality: a model of
Xin Hao Zhu1, Seng Keat Gan, Chi-Hwa Wang
1Department of Chemical and Biomolecular Engineering, National University of Singapore, 21 Lower Kent Ridge Road, Singapore 119077.
Journal of Biomedical Materials Research. Part A
|May 16, 2007
Summary
Combining collagen, laminin, and fibronectin on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) microspheres significantly enhanced Hep3B cell proliferation. This approach better mimics the in vivo environment for liver tissue engineering applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- The extracellular matrix (ECM) plays a crucial role in regulating cell behavior.
- Developing biomaterials that mimic the native ECM is essential for effective tissue engineering.
- Hep3B cells, a human hepatoma cell line, are utilized to study liver function and regeneration.
Purpose of the Study:
- To investigate the synergistic effects of combining collagen (type I), laminin, and fibronectin on poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) microspheres.
- To evaluate the impact of these ECM protein-modified microspheres on Hep3B cell proliferation and hepatic functions.
- To assess the potential of this composite biomaterial for liver tissue engineering.
Main Methods:
- Covalent conjugation of collagen, laminin, and fibronectin onto PHBV microspheres using EDC/NHS crosslinkers.
- Verification of protein conjugation via X-ray photoelectron spectroscopy (XPS) and quantification using Micro-BCA assay.
- In vitro culture of Hep3B cells on modified microspheres for 2 weeks, followed by assessment of cell proliferation (MTT assay), albumin secretion (ELISA), and P-450 activity (EROD assay).
Main Results:
- Successful covalent conjugation of ECM proteins onto PHBV microspheres was confirmed.
- The combination of collagen, laminin, and fibronectin significantly enhanced Hep3B cell proliferation compared to unmodified surfaces.
- Culturing on ECM protein-modified microspheres positively influenced key hepatic functions, including albumin secretion and P-450 activity.
Conclusions:
- The synergistic combination of collagen, laminin, and fibronectin on PHBV microspheres effectively promotes Hep3B cell proliferation.
- This ECM-mimicking biomaterial provides a more suitable in vitro environment for liver tissue engineering.
- The developed microspheres show promise for applications in regenerative medicine and liver disease research.
