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RGD-Alginate beads as scaffolds for culturing primary human dermal and pulmonary fibroblasts
M C Stahl1, K G Bergendahl1, D Zaytseva-Zotova1
1Department of Biotechnology and Food Science, NTNU Norwegian University of Science and Technology, Trondheim, Norway.
Carbohydrate Polymers
|February 19, 2026
Summary
Alginate microbeads functionalized with RGD-peptides support dermal fibroblast growth. Cyclic RGD and Mn2+ supplementation enhance pulmonary fibroblast adhesion to these granular hydrogels for 3D tissue engineering scaffolds.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Cell Biology
Background:
- Hydrogel microparticles as granular hydrogels are emerging scaffolds in tissue engineering.
- Limited research exists on culturing human pulmonary fibroblasts on granular hydrogels.
Purpose of the Study:
- To investigate the ability of RGD-peptide-grafted alginate microbeads to support adhesion and growth of human dermal and pulmonary fibroblasts.
- To explore factors influencing fibroblast adhesion to granular hydrogels.
Main Methods:
- Grafting RGD-peptides onto alginate to form microbeads.
- Culturing normal human dermal fibroblasts (NHDFs) and human pulmonary fibroblasts (HPFa) on microbeads.
- Investigating the effect of peptide concentration, Mn2+ supplementation, and cyclic RGD.
Main Results:
- NHDFs adhered and spread on linRGD-alginate microbeads, with adhesion increasing with peptide concentration.
- HPFa did not adhere to linRGD-alginate microbeads but did adhere to flat gels, indicating response to linRGD.
- Mn2+ supplementation and cyclic RGD improved HPFa adhesion to the microbeads.
Conclusions:
- RGD-alginate microbeads show promise as scaffolds for 3D cultures of both dermal and pulmonary fibroblasts.
- Alginate microbeads are relevant for structuring fibroblasts in tissue engineering applications.
- Optimizing RGD grafting and conditions is crucial for fibroblast adhesion on granular hydrogels.
