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ELISA法测定蛇毒降纤酶水溶液的稳定性

赵会英, 郑俊民*, 徐晖, 魏刚, 赵怀清   

  1. 1.沈阳药科大学药剂教研室, 沈阳 110016;
    2.沈阳药科大学分析教研室, 沈阳 110016
  • 收稿日期:2001-04-06 修回日期:2001-05-20 出版日期:2001-09-15 发布日期:2001-09-15
  • 通讯作者: 郑俊民*

pH Stability of Defibrase in Aqueous Solution Determined by En-zyme-linked Immunosorbent Assay

Zhao Huiying, Zheng Junmin*, Xu Hui, Wei Gang, Zhao Haiqing   

  1. 1. Department of Pharmaceutics, Shenyang Pharmaceutical University, Shenyang 110016;
    2. Department of Chemical Analysis, Pharmaceutical University, Shenyang 110016
  • Received:2001-04-06 Revised:2001-05-20 Online:2001-09-15 Published:2001-09-15
  • Contact: Zheng Junmin*

摘要: 考察了蛇毒降纤酶在不同pH缓冲液的稳定性。以酶联免疫吸附法(ELISA)测定了蛇毒降纤酶的抗原活性稳定性, 并与凝固时间法测定的生物活性稳定性进行了比较。降纤酶抗原活性与其生物活性随时间降低的趋势一致(pH 3.6的缓冲液除外)。较高浓度的降纤酶在中性pH 6~7的缓冲液中比较稳定, 40 °C 放置10天后, 仍能保持其原有活性(100 BU·mL-1) 95% 以上。而较低浓度的降纤酶(5 BU·mL-1)水溶液相对不稳定, 尤其在酸性(pH 3.6)或碱性(pH 9)条件下很容易失去活性。加入Triton X-100或牛血清白蛋白, 由于降低了表面吸附, 可显著提高降纤酶水溶液的稳定性(P<0.005)

关键词: 稳定性, 降纤酶, 酶联免疫吸附法ELISA

Abstract: Stability of Defibrase® in various pH buffer solutions was investigated. Enzyme-linked immuno-sorbent assay (ELISA) and coagulating time method were used to assess antigenic stability and coagulating stability, respectively. The change of antigenic activities and coagulating activities of Defibrase® in the same buffer solutions (pH 6, 7 and 8, with the exception of pH 3.6) showed similar tendency to decline with the time. Concentrated Defibrase® was relatively stable at neutral pH 6~7, more than 95% of its initial activities (100 BU·mL-1) was kept after a 10-day storage at 40 °C, whereas in pH 3.6 and pH 9 buffer solutions, diluted Defibrase® was very labile. Addition of Triton X-100 or bovine serum albumin could effectively prevent loss of Defibrase® by minimizing adsorption of Defibrase® to plastic surface (P<0.005). Concentration of Defibrase® could also affect its stability in aqueous solutions.

Key words: Stability, Defibrase, ELISA

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