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凝胶过滤色谱和Bradford法测定发酵类抗生素中蛋白残留量

许明哲, 马仕洪, 胡昌勤*   

  1. 中国药品生物制品检定所, 北京 100050
  • 收稿日期:2004-06-27 修回日期:2004-11-10 出版日期:2004-12-15 发布日期:2004-12-15
  • 通讯作者: 胡昌勤*

Gel Filtration Chromatography Combined with Bradford Method for Determination of Total Residual Protein in Ferment Antibiotics

XU Ming-Zhe, MA Shi-Hong, HU Chang-Qin*   

  1. National Institute for Control of Pharmaceutical and Biological Products, Beijing 100050, China
  • Received:2004-06-27 Revised:2004-11-10 Online:2004-12-15 Published:2004-12-15
  • Contact: HU Chang-Qin*

摘要: 目的 以发酵类抗生素盐酸林可霉素为例,建立一个快速、简单、灵敏度高的可用于发酵类抗生素中蛋白残留量控制的方法. 方法 利用凝胶过滤色谱(GFC)首先将蛋白质与抗生素分离, 收集蛋白组分,再利用蛋白检测方法Bradford(考马氏亮兰染色法)对残留的蛋白进行定量; 色谱柱为SuperdexTM Peptide HR 10/30; 检测波长为214 nm; 流速为1 mL·min-1; 流动相为0.01 mol·L-1磷酸盐缓冲液; 进样量为500 μL. 结果 本方法蛋白(BSA)的平均回收率大于90%, 蛋白浓度在0-12 μg·mL-1之间符合曲线方程y = -0.0024x2 + 0.0642x + 0.0029, r2=0.9999; 检测限为3 ng·mL-1 (相当于盐酸林可霉素中蛋白的残留量为7×10-7).结论 本方法简便,快速,灵敏,可以用于控制发酵类抗生素中蛋白的残留量.

关键词: 凝胶过滤色谱, 凝胶过滤色谱, 凝胶过滤色谱, Bradford法, Bradford法, Bradford法, 残留蛋白, 残留蛋白, 残留蛋白, 发酵类抗生素, 发酵类抗生素, 发酵类抗生素, 盐酸林可霉素, 盐酸林可霉素, 盐酸林可霉素

Abstract: Aim A novel method has been developed for evaluation of the levels of total residual protein in antibiotics produced by fermentation using gel filtration chromatography (GFC) combined with Bradford assay based on determination of residual protein in lincomycin hydrochloride. Methods The chromatographic conditions were SuperdexTM peptide column, 0.01 mol·L-1 phosphate buffer solution as mobile phase, and flow rate of 1 mL·min-1. Five hundred microliters of lincomycin hydrochloride solution (3 g of lincomycin hydrochloride dissolved in 10 mL of mobile phase) was injected into the chromatograph and the eluted solution was collected between 6 min and 14.5 min (protein eluted from column within this period), and the residual content of total protein in the eluted solution was assayed using Bradford assay method. Results The average recovery was more than 90% for bovine serum albumin, the calibration equation for the range of 0-12 μg·mL-1 of protein was y = -0.0024x2 + 0.0642x + 0.0029, r20.9999, RSD = 0.1%-0.9%, and the LOD and LOQ were 3 and 10 ng·mL-1 of protein, respectively. Conclusion The novel method for determining the residual protein in ferment antibio-tics is simple, rapid, and precise.

Key words: Gel filtration chromatography, Gel filtration chromatography, bradford assay, bradford assay, residual protein, residual protein, ferment antibiotics, ferment antibiotics, lincomycin hydrochloride, lincomycin hydrochloride

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Supporting: *Corresponding author. Tel.: 86-10-67017755-308; fax: 86-10-65115148