生物学杂志

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脱细胞猪小肠黏膜下层基质中纤维连接蛋白定量检测方法研究

  

  1. 1. 北京博辉瑞进生物科技有限公司, 北京 100026; 2. 中国科学院 过程工程研究所 生化工程国家重点实验室, 北京 100190; 3. 河南科技学院 生命科技学院,新乡453003
  • 出版日期:2018-04-18 发布日期:2018-04-18
  • 通讯作者: 张贵锋,博士,研究员,研究方向为蛋白分析检验,E-mail:gfzhang@ipe.ac.cn;赵博,博士,副主任医师,研究方向为消化道恶性肿瘤基础与临床研究及外科修复医用生物材料,E-mail:zhaobo@biosishealing.com
  • 作者简介:陈毅,博士,研究方向为蛋白质分离纯化,生物材料制备与性能表征,E-mail:cy63532499@163.com
  • 基金资助:
    北京市科技新星计划(Z181100006218013,XX2018008);国家863计划新材料领域专项(2015AA033602);科技部中小企业创新基金(Z14010101281);广东省自然科学基金项目(2014A030312013)

Quantitative detection of fibronectin in porcine small intestinal submucosa extracellular matrix

  1. 1. Beijing Biosis Healing Biological Technology Co., Ltd., Beijing 100026; 2. State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, CAS, Beijing 100190; 3. School of Life Science and Technology, Henan Institute of Science and Technology, Xinxiang 453003, China
  • Online:2018-04-18 Published:2018-04-18

摘要: 采用分批次酶解和高效液相色谱与质谱分析联用技术(HPLC-MS)对脱细胞猪小肠黏膜下层(p-SIS)基质材料中纤维连接蛋白(FN)进行了定量检测。分批次酶解消除了静态酶解时间长、酶解效率低的不足,将酶解时间从96 h缩短至6 h,降解率可以达到95%以上。采用胰蛋白酶特异性酶解得到猪源FN的一个特征多肽为SSPVVIDASTAIDAPSNLR,HPLC-MS对这一特征肽段定量检测结果表明,VIDASISTM和Biodesign两种脱细胞材料中FN的含量分别为0.43%和0.17%。方法学实验证明该方法精确度较高(RSD为1.31%)。结果表明基于质谱的分析技术可有效检测脱细胞基质中FN含量。

关键词: 猪小肠黏膜下层, 脱细胞基质, 纤维连接蛋白, 特征肽段, 液质联用技术

Abstract: Quantitative analysis of fibronectin in porcine small intestinal submucosa(p-SIS) acellular matrix was investigated using batch enzymatic digest and high performance liquid chromatography mass spectrometry(HPLC-MS). The results indicated that batch enzymatic digest could improve the hydrolysis efficiency compared to static enzymatic hydrolysis. The hydrolysis time decreased to 6 hours from 96 hours, and the enzymatic hydrolysis rate amounted to 95%. Marker peptide, SSPVVIDASTAIDAPSNLR, was detected from the tryptic digest of FN. Based on the peak areas of marker peptide from FN standards with different concentration, the FN content in VIDASISTM was determined as 0.43%. Amount of FN in Biodesign was determined as 0.17%. The method precision(RSD, 1.31%) and the deviation were carried out in the methodology experiments. The results indicate the established quantitative method is effective for detecting FN content in acellular matrix.

Key words: porcine small intestinal submucosa, extracellular matrix, fibronectin, marker peptide, LC-MS