中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (34): 5564-5569.doi: 10.3969/j.issn.2095-4344.2343

• 膜生物材料 membrane biomaterials • 上一篇    下一篇

脱细胞异种生物外科补片的免疫原性 

 1,郭  1,刘燕萍1,韦晓慧2,雷  2,巫  1,黄  1,黄  1,荣祖元1,凌  2   

  1. 1四川省食品药品检验检测院,四川省成都市  6117312冠昊生物科技股份有限公司,再生型医用植入器械国家工程实验室,广东省广州市  510530

  • 收稿日期:2019-12-23 修回日期:2019-12-27 接受日期:2020-02-26 出版日期:2020-11-08 发布日期:2020-09-11
  • 通讯作者: 荣祖元,研究员,四川省食品药品检验检测院安全评价中心,四川省成都市 611731 凌友,博士,冠昊生物科技股份有限公司,再生型医用植入器械国家工程实验室,广东省广州市 510530
  • 作者简介:程祥,男,1990年生,江苏省泰州市人,汉族,2015年西南交通大学毕业,硕士,主要从事医疗器械生物学评价工作。
  • 基金资助:
    四川省食品药品检验检测院院立科研项目(2018-KYYL-008);国家重点研发计划课题(2018YFC1105902)

Immunogenicity of heterogeneous acellular biosurgical patch

Cheng Xiang1, Guo Huan1, Liu Yanping1, Wei Xiaohui2, Lei Dan2, Wu Tao1, Huang Ting1, Huang Ming1, Rong Zuyuan1, Ling You2    

  1. 1Sichuan Institute for Food and Drug Control, Chengdu 611731, Sichuan Province, China; 2Guanhao Biotech Co., Ltd., National Engineering Laboratory for Regenerative Implantable Medical Devices, Guangzhou 510530, Guangdong Province, China

  • Received:2019-12-23 Revised:2019-12-27 Accepted:2020-02-26 Online:2020-11-08 Published:2020-09-11
  • Contact: Rong Zuyuan, Researcher, Sichuan Institute for Food and Drug Control, Chengdu 611731, Sichuan Province, China Ling You, PhD, Guanhao Biotech Co., Ltd., National Engineering Laboratory for Regenerative Implantable Medical Devices, Guangzhou 510530, Guangdong Province, China
  • About author:Cheng Xiang, Master, Sichuan Institute for Food and Drug Control, Chengdu 611731, Sichuan Province, China
  • Supported by:
    the Scientific Research Project of Sichuan Institute for Food and Drug Control, No. 2018-KYYL-008; the National Key Research &Development Program of China, No. 2018YFC1105902

摘要:

文题释义:

免疫原性:指能够刺激免疫系统的细胞引起某种抗原特异性免疫应答。当动物源性材料植入人体后,其细胞表面的α-Gal抗原与人体内存在的天然抗α-Gal抗体结合,会激活补体系统引起严重的超急性排斥反应;还可通过抗体依赖细胞介导的细胞毒性作用,引起异种移植排斥反应。对于异种材料植入人体所产生的潜在风险,有必要对其进行免疫原性风险评估。

脱细胞技术:指通过物理、化学、生物学等一系列的方法处理同种异体的组织、器官,使其细胞内基质除去完全而保留相应的细胞外基质的方法。脱细胞技术可降低甚至除去异体组织、器官的免疫源性(α-Gal抗原)等,降低异体生物材料移植引起的排斥反应,为异体生物材料的临床运用提供基础。

背景:脱细胞异种生物外科补片的免疫原性直接关系到其植入人体后的成功与否,因而评价材料的免疫原性至关重要。

目的:评价脱细胞异种生物外科补片的免疫原性。

方法:20Balb/c小鼠随机分4组,每组5只:实验组与对照组背部皮下分别植入脱细胞异种生物外科补片与心包膜原材料;阴性对照组行假手术操作;阳性对照组背部皮下注射弗氏佐剂和牛血清白蛋白等体积混合液。植入4周后,记录小鼠体质量,计算各组脾脏和胸腺的脏脑系数,检测血清总IgGIgM水平、体外淋巴细胞增殖活性及脾脏淋巴细胞亚型分布,并进行植入部位皮肤组织及脾脏、胸腺组织病理学观察。实验方案经四川省食品药品检验检测院安全评价中心实验动物管理和使用委员会批准(IACUC-2018-KYYL-008)

结果与结论:①实验组与阴性对照组体质量比较差异无显著性意义(P > 0.05),对照组大于阴性对照组(P < 0.05);②实验组与阴性对照组脾脏脏脑系数、胸腺脏脑系数比较差异均无显著性意义(P > 0.05),对照组脾脏脏脑系数大于阴性对照组(P < 0.05);③实验组与阴性对照组淋巴细胞增殖活性比较差异无显著性意义(P > 0.05),对照组高于阴性对照组(P < 0.05);④与阴性对照组相比,实验组CD3+CD8+细胞百分比降低(P < 0.05);与阴性对照组相比,对照组CD3+细胞、CD3+CD4+细胞、CD3+CD8+细胞、CD45+SSClow细胞百分比下降(P < 0.05)CD3-CD19+细胞百分比升高(P < 0.05);⑤实验组、对照组血清IgMIgG抗体水平与阴性对照组相比差异均无显著性意义(P < 0.05);⑥组织学显示,实验组与对照组脾脏和胸腺无明显病理改变,实验组植入部位无明显炎性反应,对照组植入部位出现严重肉芽肿性炎及纤维组织增生包裹、植入物坏死崩解等;⑦结果表明与原材料相比,经脱细胞处理的异种生物外科补片可有效降低免疫原性反应。

ORCID: 0000-0003-3480-6101(程祥)

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: 材料, 脱细胞">,  , 补片">,  , 免疫原性">,  , 心包膜">,  , 脾脏">,  , 胸腺">,  , 淋巴细胞">,  , 抗体

Abstract:

BACKGROUND: Since the removal of immunogenicity of heterogeneous acellular patch is directly related to the success of the implantation into human body, it is vital to evaluate the immunogenicity of the material.

OBJECTIVE: To evaluate the immunogenicity of heterogeneous acellular surgical path.

METHODS: Twenty Balb/c mice were randomly divided into four groups (n=5 per group). Mice in the experimental group and control group were subcutaneously implanted with heterogeneous acellular biosurgical patch and pericardium on the back. Negative controls received sham operation. Mice in the positive control group received subcutaneous injection of the mixture of Freund’s adjuvant and bovine serum albumin in equal volumes. At 4 weeks after implantation, the body weight of mice was recorded; the coefficients of spleen and thymus were calculated; the level of total serum IgG and IgM, the proliferation activity of lymphocytes in vitro and the distribution of lymphocyte subtypes in the spleen were measured; and the histopathology of the skin, spleen and thymus was observed. The experiment was approved by the Laboratory Animal Management and Use Committee of Safety Evaluation Center, Sichuan Institute for Food and Drug Control (approval No. IACUC-2018-KYYL-008).  

RESULTS and CONCLUSION: (1) There were no significant changes in the mouse body weight between the experimental group and negative control group (P > 0.05). Body weight was higher in the control group than in the negative control group (P < 0.05). (2) There was no significant difference in the brain ratios of spleen and thymus between the experimental group and the negative control group (P > 0.05). The brain ratio of spleen was higher in the control group than in the negative control group (P < 0.05). (3) There was no significant difference in lymphocyte proliferation between the experimental group and the negative control group (P > 0.05). Lymphocyte proliferation was higher in the control group than in the negative control group (P < 0.05). (4) Compared with the negative control group, the percentage of CD3+CD8+ cells was significantly decreased in the experimental group (P < 0.05). Compared with the negative control group, the percentages of CD3+ cells, CD3+CD4+ cells, CD3+CD8+ cells, and CD45+SSClow cells were decreased (P < 0.05) and the percentage of CD3-CD19+ cells was increased (P < 0.05) in the control group. (5) There was no significant difference in serum IgM and IgG antibody levels between the experimental and control groups and the negative control group (P < 0.05). (6) The histological examination results showed that there were no obvious pathological changes in the spleen and thymus in the experimental group and the control group, and no obvious inflammatory reaction in the experimental group. In the control group, there were severe granulomatous inflammation, fibrous tissue hyperplasia, wrapping, necrosis and disintegration of implants. (7) The results demonstrated that compared with the raw material, the immunogenicity of acellular treated biosurgical patch could be reduced effectively.

Key words: materials">,  , acellular, patch">,  , immunogenicity">,  , pericardium">,  , spleen">,  , thymus">,  , lymphocyte">,  , antibody

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