Tissue Eng Regen Med.  2018 Apr;15(2):145-154. 10.1007/s13770-017-0083-9.

In Vivo Biocompatibility and Improved Compression Strength of Reinforced Keratin/Hydroxyapatite Scaffold

• Fan J
• Yu MY
• Lei TD
• Wang YH
• Cao FY
• Qin X
• Liu Y

• KMID: 2410509
• DOI: http://doi.org/10.1007/s13770-017-0083-9

Abstract

A rapid freezing/lyophilizing/reinforcing process is suggested to fabricate reinforced keratin/hydroxyapatite (HA) scaffold with improved mechanical property and biocompatibility for tissue engineering. The keratin, extracted from human hair, and HA mixture were rapidly frozen with liquid nitrogen and then lyophilized to prepare keratin/HA laminar scaffold. The scaffold was then immersed in PBS for reinforcement treatment, and followed by a second lyophilization to prepare the reinforced keratin/HA scaffold. The morphology, mechanical, chemical, crystal and thermal property of the keratin/HA scaffold were investigated by SEM, FTIR, XRD, DSC, respectively. The results showed that the keratin/HA scaffold had a high porosity of 76.17 ± 3%. The maximum compressive strength and compressive modulus of the reinforced scaffold is 0.778 and 3.3 MPa respectively. Subcutaneous implantation studies in mice showed that in vivo the scaffold was biocompatible since the foreign body reaction seen around the implanted scaffold samples was moderate and became minimal upon increasing implantation time. These results demonstrate that the keratin/HA reinforced scaffold prepared here is promising for biomedical utilization.

Keyword

Keratin; Hydroxyapatite; Scaffold; Biomaterial; Hair

MeSH Terms

Animals
Compressive Strength
Durapatite
Foreign-Body Reaction
Freeze Drying
Hair
Humans
Mice
Nitrogen
Porosity
Spectroscopy, Fourier Transform Infrared
Tissue Engineering
Durapatite
Nitrogen