中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (22): 3460-3466.doi: 10.12307/2022.271

• 材料生物相容性 material biocompatibility • 上一篇    下一篇

胶原蛋白海绵的制备及安全性评价

刘超远,高田芳,黄  伟   

  1. 杭州协合医疗用品有限公司,浙江省杭州市   310018
  • 收稿日期:2020-11-23 修回日期:2021-01-23 接受日期:2021-05-27 出版日期:2022-08-08 发布日期:2022-01-12
  • 通讯作者: 黄伟,高级工程师,杭州协合医疗用品有限公司,浙江省杭州市 310018
  • 作者简介:刘超远,男,1992年生,河南省平顶山市人,汉族,2019年四川大学毕业,硕士,助理工程师,主要从事生物医学材料研究。

Fabrication and safety evaluation of collagen sponge

Liu Chaoyuan, Gao Tianfang, Huang Wei   

  1. Hangzhou Singclean Medical Products Co., Ltd., Hangzhou 310018, Zhejiang Province, China
  • Received:2020-11-23 Revised:2021-01-23 Accepted:2021-05-27 Online:2022-08-08 Published:2022-01-12
  • Contact: Huang Wei, Senior engineer, Hangzhou Singclean Medical Products Co., Ltd., Hangzhou 310018, Zhejiang Province, China
  • About author:Liu Chaoyuan, Master, Assistant engineer, Hangzhou Singclean Medical Products Co., Ltd., Hangzhou 310018, Zhejiang Province, China

摘要:

文题释义:
胶原蛋白海绵:在动物跟腱、皮、鱼鳞等含有胶原较多的机体组织中,通过酸法、酶法、碱法或酸酶结合法等方法提取,并通过盐析、透析等纯化工艺得到的胶原溶液,最后将此溶液通过冷冻干燥工艺得到三维网孔状的固体。实验中胶原蛋白的提取采用的是酸酶结合法,在温和的条件下进行,可以有效保持胶原蛋白的活性。
冷冻干燥工艺:胶原蛋白的热变性温度较低,因此其脱水过程适合用低温低压的冷冻干燥工艺进行。实验中将胶原蛋白冻干液置于大型冷冻干燥机中,迅速低温凝固,保持形态;再经抽真空方式将原冻干液中的水分通过冷凝器吸收并除去,原水汽聚集的部位留下孔洞结构,即得到了蓬松的海绵结构固体。

背景:自动物体提取胶原蛋白并经冻干工艺得到胶原蛋白海绵,可赋予材料良好的临床止血性能,同时可实现在机体中的自身降解,但所提取的胶原蛋白也存在携带病毒及体内免疫原性风险。经过酸酶结合工艺处理去除胶原端肽、并灭活病毒,实现材料良好的生物安全性。
目的:规模化生产制备胶原蛋白海绵,并对其进行免疫原性及病毒灭活有效性的整体生物安全性评价。
方法:通过酸酶结合法从牛跟腱中提取胶原蛋白,经冷冻干燥工艺得到胶原蛋白止血海绵。将1,4片胶原蛋白海绵分别埋植于Wistar大鼠腹部皮下,埋植1,4,8,12周后对大鼠体征、血常规、T淋巴细胞增殖、免疫球蛋白含量等指标进行检测。取3批次的牛跟腱粉碎后中间体样品,分别浸泡于伪狂犬病毒、水泡性口炎病毒、猪细小病毒和猪脑心肌炎病毒液中,检验酸酶结合法处理的胶原蛋白海绵对病毒灭活的有效性。
结果与结论:①于无菌车间规模化提取胶原蛋白,经冷冻干燥后得到胶原蛋白海绵,并完成内外包装和辐照灭菌的生产全过程;②埋植1,4片胶原蛋白海绵大鼠的生理体征、血常规、NK细胞杀伤活性、T淋巴细胞增殖状态及免疫球蛋白含量等指标均表现正常;③酸酶法工艺灭活的3批次牛跟腱粉碎后中间体样品均无可以检测到的病毒,可使病毒滴度下降4个logs以上;同时,对未能检测到的病毒滴度样品进行了敏感细胞接种盲传3代,结果未显示细胞病变;④免疫原性和病毒灭活检测表明,所制备的胶原蛋白止血海绵有着良好的生物安全性。

https://orcid.org/0000-0002-2290-7987(刘超远) 

中国组织工程研究杂志出版内容重点:生物材料;骨生物材料口腔生物材料纳米材料缓释材料材料相容性;组织工程

关键词: 胶原蛋白, 海绵, 止血材料, 端肽, 免疫原性, 冷冻干燥, 酸酶结合法, 病毒灭活

Abstract: BACKGROUND: Collagen could be extracted from the animal, and the collagen sponge could be fabricated by vacuum freeze-drying technology, which is used in clinical hemostasis. Besides, it would be degraded in vivo. However, there are some concerns about collagen biomaterials, owing to the potential risk of carrying viruses and immune rejection. The biological safety of collagen hemostatic sponge was achieved by removing the terminated peptide and inactivating the virus. 
OBJECTIVE: To investigate the immunogenicity and the validity of virus inactivation of collagen hemostatic sponge in commercial process.
METHODS:  The collagen was extracted from bovine tendons through acid-enzymatic hydrolysis. After the vacuum freeze-drying technology, the porous collagen hemostatic sponge was prepared. The immunogenicity was investigated by insert 1 or 4 pieces of collagen sponge in Wistar rats subcutaneously. The physical sign, blood routine examination, T lymphocyte proliferation, and immunoglobulin content were examined at 1, 4, 8 and 12 weeks. Pseudorabies virus, vesicular stomatitis virus, porcine parvovirus and porcine encephalomyocarditis virus were chose as indicator virus to investigate the validity of virus  inactivation by three batches of crushed bovine tendons.
RESULTS AND CONCLUSION: (1) The collagen sponge was extracted and fabricated by freeze-drying technology in clean workshop in commercial process. The irradiation sterilization was conducted after the whole process of packaging of the collagen sponge. (2) After inserting 1 or 4 pieces of collagen sponge, the physiological signs, routine blood tests, NK cell killing activity, T lymphocyte proliferation, and immunoglobulin content of the rats were found to be normal. (3) There was no detectable virus, which could reduce the titer of these four kinds of indicator virus by more than four logs, after the acid-enzymatic process of collagen sponge. In addition, sensitive cells inoculation and blind cultivation for three generations were performed on the virus titer samples that could not be detected, and the results showed no cytopathic effect. (4) Immunogenicity and virus inactivation test results showed that the prepared collagen hemostatic sponge had good biological safety which could be used in clinical hemostasis.

Key words: collagen, sponge, hemostatic materials, terminated peptide, immunogenicity, freeze-drying, acid-enzymatic hydrolysis, virus inactivation

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