生物技术通报 ›› 2017, Vol. 33 ›› Issue (3): 151-161.doi: 10.13560/j.cnki.biotech.bull.1985.2017.03.022

• 研究报告 • 上一篇    下一篇

高原鼢鼠组织中透明质酸提取工艺及分子表征

魏琳娜1, 汪洋1, 魏登邦1,2, 魏莲1, 王宁1, 索有瑞2   

  1. 1. 青海大学农牧学院,西宁 810016;
    2. 青海大学省部共建三江源生态与高原农牧业国家重点实验室,西宁 810016
  • 收稿日期:2016-07-10 出版日期:2017-03-26 发布日期:2017-03-07
  • 作者简介:魏琳娜,女,硕士研究生,研究方向:野生动植物资源保护与利用;E-mail:weilinna92@163.com
  • 基金资助:
    国家自然科学基金项目(31260512),青海省自然科学基金项目(2014-ZJ-714)

The Extraction Process and Molecular Characterization of Hyaluronic Acid in the Plateau Zokor Tissues

WEI Lin-na1, WANG Yang1, WEI Deng-bang1,2, WEI Lian1, WANG Ning1, SUO You-rui2   

  1. 1. College of Agriculture and Animal Husbandry,Qinghai University,Xining 810016;
    2. State Key Laboratory of Plateau Ecology and Agriculture,Qinghai University,Xining 810016
  • Received:2016-07-10 Published:2017-03-26 Online:2017-03-07

摘要: 旨在建立高原鼢鼠组织中透明质酸(Hyaluronic acid,HA)提取工艺。采用单因素试验确定粗提、酶解和除杂等工艺的最佳条件,通过响应面法进一步优化粗提和酶解工艺条件。通过红外分光光度法确定HA的分子结构,Bitter-Muir法确定其葡萄糖醛酸的含量,黏度法和体积排阻色谱法确定透明质酸的分子量。高原鼢鼠最佳粗取工艺∶液料比4 mL/g(水/动物组织,V/W),提取温度26℃,提取时间1.6 h;最佳酶解工艺:酶解温度37℃,pH8.7,加酶量0.7%(1∶250 胰蛋白酶/动物组织,W/W);最佳除杂工艺为:氯苯体积20%(氯苯/HA水溶液,V/V),以3倍体积95%乙醇沉淀,以7%活性碳(活性碳/HA水溶液,W/V)除杂,透析时间3 h。在此工艺条件下,每500 g 高原鼢鼠组织可得到(144±3.61)mg HA粉末。平均回收率为72.73%。红外图谱显示提取物具有与Sigma公司的HA标准品一致的吸收峰,葡萄糖醛酸的质量分数为45.60%,蛋白质含量为0.11%,其分子量达到3×106 Da。本工艺提取的高原鼢鼠组织来源的HA回收率好,纯度高;高原鼢鼠组织中HA分子量大,含量高。

关键词: 高原鼢鼠, 透明质酸(HA), 提取工艺, 表征方法

Abstract: We aim to establish an extraction process of hyaluronic acid(HA)from the tissues of plateau zokor(Myospalax baileyi). One-factor experiments were used to determine the optimal conditions of crude extraction,enzymolysis,and edulcoration process,and response surface method was applied to further optimize the crude extraction and enzymolysis process. The molecular structure of the extracted HA was determined by infrared spectrophotometry,the content of glucuronic acid by the Bitter-Muir method,and the molecular weight by the method of viscosity and size exclusion chromatography. As results,the optimal conditions of crude extraction was: liquid/material ratio 4 mL/g(water/tissues,V/W),extraction temperature 26℃,and extraction time 1.6 h. The optimal enzymolysis process was: temperature 37℃,pH 8.7,and 0.7% added enzyme(1:250 trypsasy/tissue,W/W). The optimal edulcoration process was: 20% chlorobenzene(chlorobenzene/HA solution,V/V),95% alcohol precipitation ratio in 3 times volume,7% activated carbon(activated carbon/HA solution,W/V)to do edulcoration,and dialysis for 3 h. Under above optimal conditions,144 ± 3.61 mg HA powder was obtained from 500 g tissues of plateau zokor,and the average recovery rate was 72.73%. Infrared spectrum displayed the same absorption peak of HA by standard samples from Sigma. The mass fraction of glucuronic acid was 45.60%,and the protein content was 0.11%. The molecular weight of hyaluronic acid reached 3×106 Da. Conclusively,the HA from plateau zokor’s tissues by this extraction method is of good recovery rate and high purity,and HA in the tissues of plateau zokor is of high molecular weight and high content.

Key words: plateau zokor, hyaluronic acid, extraction process, characterization methods