Bioactive collagen peptide functionalized polyglucuronic acid - In vitro analysis as a potential biomaterial for bone
A Tejaswini1, S Navya2, K G Poornima1
1Department of Biotechnology, School of BioSciences and Technology, Vellore Institute of Technology, Vellore, Tamilnadu, India.
International Journal of Biological Macromolecules
|July 4, 2025
Summary
Polyglucuronic acid (PGU) functionalized with a bioactive peptide shows promise for bone tissue engineering. The optimized PGU-PH-PP1 concentration enhanced cell viability and stimulated key bone growth markers.
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Tissue Engineering
Background:
- Bone tissue engineering requires advanced biomaterials to promote cellular functions.
- Polyglucuronic acid (PGU) is a polysaccharide with potential for biomedical applications.
- Functionalization with bioactive peptides can enhance biomaterial properties for specific cellular responses.
Purpose of the Study:
- To investigate polyglucuronic acid (PGU) functionalized with a bioactive peptide (GKNGDDGEA) as a biomaterial for bone tissue engineering.
- To evaluate the effect of different concentrations of PGU-PH-PP1 on MG63 cell adhesion, proliferation, and osteogenic gene expression.
- To determine the optimal concentration of PGU-PH-PP1 for enhanced cell viability and osteogenic differentiation.
Main Methods:
- Coating polystyrene surfaces with varying concentrations of bioactive peptide-functionalized PGU (PGU-PH-PP1).
- Assessing cell adhesion, proliferation, and viability using the MG63 cell line.
- Analyzing the gene expression of osteogenic markers, including osteopontin, osteocalcin, alkaline phosphatase, and runt-related transcription factor 2.
Main Results:
- The optimal concentration of PGU-PH-PP1 (0.714 ng/cm²) significantly enhanced cell viability by approximately 20% compared to PGU alone.
- Functionalized PGU coatings demonstrated increased wettability, promoting protein adsorption and cell adhesion, crucial for osseointegration.
- PGU-PH-PP1 at 0.714 ng/cm² stimulated the production of key osteogenic markers essential for bone extracellular matrix development.
Conclusions:
- Bioactive peptide-functionalized PGU (PGU-PH-PP1) is a promising biomaterial for bone tissue engineering due to enhanced cell adhesion and osteoinductive properties.
- The study provides a foundation for developing 3D scaffolds and bioink formulations using PGU-PH-PP1 for regenerative applications.
- Optimized functionalization of PGU with bioactive peptides can significantly improve its performance in promoting bone regeneration.
Related Concept Videos
01:25Protein Glycosylation
Glycosylation, the most common post-translational modification for proteins, serves diverse functions. Adding sugars to proteins makes the proteins more resistant to proteolytic digestion. Glycosylated proteins can act as markers and receptors to promote cell-cell adhesion. Additionally, they have many essential quality control functions in the cell, such as correct protein folding and facilitating transport of misfolded proteins to the cytosol, which can be degraded.
Glycosylation occurs in...
Glycosylation occurs in...
01:24Oligosaccharide Assembly
Protein glycosylation starts in the ER lumen and continues in the Golgi apparatus. Glycosyltransferases catalyze the addition of sugar molecules or glycosylation of proteins. Usually, these enzymes add sugars to the hydroxyl groups of selected serine or threonine residues to form O-linked glycans or the amino groups of asparagine residues to form N-linked glycans. Different positions on the same polypeptide chain can contain differently linked glycans.
Multiple sugar molecules that may or may...
Multiple sugar molecules that may or may...