Chinese Journal of Tissue Engineering Research ›› 2019, Vol. 23 ›› Issue (22): 3542-3548.doi: 10.3969/j.issn.2095-4344.1738

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Study on immunogenicity of type I atelocollagen

Zhang Ziqiang1, Zhang Yihe1, An Qi1, Xu Rongrong2, Li Huan2, Wang Enbo3
  

  1. 1Beijing Key Laboratory of Material Utilization of Non-metallic Minerals and Solid Waste Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 102200, China; 2Beijing Peisheng Biotech Co., Ltd., Beijing 102200, China; 3Department of Oral and Maxillofacial Surgery, Peking University Hospital of Stomatology, Beijing 100081, China
  • Received:2019-02-22
  • Contact: Zhang Ziqiang, Beijing Key Laboratory of Material Utilization of Non-metallic Minerals and Solid Waste Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 102200, China
  • About author:Zhang Ziqiang, PhD, Beijing Key Laboratory of Material Utilization of Non-metallic Minerals and Solid Waste Resources, School of Materials Science and Technology, China University of Geosciences, Beijing 102200, China
  • Supported by:

    the Science and Technology Program of Beijing, No. Z16010101427 (to ZZQ)

Abstract:

BACKGROUND: The immunogenicity of type I collagen mainly locates in the telopeptide of molecular chain, which can be inactivated through hydrolysis or removal in the process of collagen extraction. Type I atelocollagen decreases its immunogenicity.
OBJECTIVE: To evaluate the immunogenicity of type I atelocollagen.
METHODS: Type I atelocollagen was prepared by enzyme digestion, salting-out and dialysis. The purity of type I atelocollagen was identified through analyzing the dyeing limit of comassiebule. The residual DNA was detected by Quant-IT PicoGreen dsDNA Reagent and Kits described in YY/T 0606.25-2014. The effect of telopeptide removing was detected by ELISA. The content of α-Gal antigen was tested according to the criteria in YY/T 1561-2017.
RESULTS AND CONCLUSION: The purity of type I atelocollagen reached 99.8%. The residual DNA was below 4 µg/g. The contents of N-terminal telopeptide and C-terminal telopeptide were lower than the examination limit. The content of α-Gal antigen was lower than the detection limit. The immunogenicity of collagen is remarkably decreased by preparing type I atelocollagen using enzyme digestion, salting-out and dialysis, which can effectively control its risk of immunogenicity in clinical application.

Key words: atelocollagen, type I collagen, immunogenicity, residual DNA, telopeptide, α-Gal antigen, collagen purity

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