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The promising indicators for thermal and mechanical properties of collagen from bass and tilapia: Synergistic effect of hydroxyproline and cysteine

Abstract

Collagen has been widely documented as one of the most potential and competitive biomaterials for tissue engineering and medical applications. However, the properties of collagen differ from one source to another. In the present study, type I collagen (COL-I) was extracted and purified from the skins of Japanese sea bass (Lateolabrax japonicus) and Nile tilapia (Oreochromis niloticus). Ultra violet (UV) spectra, Fourier transform infrared spectra (FTIR) and SDS-PAGE were performed to characterize both COL-Is. The denaturing temperature of bass collagen (BC) was observed to be 27.2°C, and 35.3°C for tilapia collagen (TC). The content of hydroxyproline was 13.4% in TC, which was similar with that in porcine collagen (PC, 13.6%) and higher than that in BC (10.3%), while the content of cysteine in TC (0.87%) was significantly higher than that in PC (0.04%) and BC (0.35%). After incubated at different temperature for 9 h, more degraded collagen bands appeared in BC hydrogel (BCH) than in TC hydrogel (TCH) group, indicating that TCH exhibited better thermal stability than BCH. The thermal stability of TCH and PC hydrogel (PCH) was similar. The compressive stress of TCH was up to 0.099 MPa, while it was 0.047 MPa for BCH and 0.003 MPa for PCH. These results demonstrated that the content of amino acid (especially hydroxyproline and cysteine) had a synergistic effect on the thermal and mechanical properties of BCH, TCH and PCH, which would be an indicator for the thermal and mechanical properties of collagen hydrogels in future studies.

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Publication details

The article was received on 18 Jun 2018, accepted on 12 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8BM00675J
Citation: Biomater. Sci., 2018, Accepted Manuscript
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    The promising indicators for thermal and mechanical properties of collagen from bass and tilapia: Synergistic effect of hydroxyproline and cysteine

    Z. Bao, Y. Sun, K. Rai, X. Peng, S. Wang, R. Nian and M. Xian, Biomater. Sci., 2018, Accepted Manuscript , DOI: 10.1039/C8BM00675J

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