Recombinant mussel coating protein fused with cell adhesion recognition motif enhanced cell proliferation

Abstract

Endurable coating on biomedical substrates is one of the most important issues in biomedical engineering field. Recently, a robust yet reversible coating has found in the cuticle of mussel byssus and the mimicking of the mussel cuticle coating has been considered as a strategy to build up endurable coating on biomedical materials. To date, the only known protein in the cuticle is mussel foot protein-1 (fp-1). To form endurable and bioactive coating on the biomedical surface, the fusion protein of fp-1 and GRGDSP peptide (fp-1-RGD) was genetically designed and produced in E. coli. The fusion protein of fp-1-RGD was successfully expressed as a form of inclusion body and was simply purified by diluted acetic acid extraction with high purity (similar to 95%). Fp-1-RGD was coated on the tissue culture polystyrene (TCPS) and showed better preosteoblast cell proliferation than that of TCPS. Therefore, the marriage of fp-1 and bioactive peptide can be a good strategy to form bioactive and endurable coating in biomedical field.