生物技术通报 ›› 2015, Vol. 31 ›› Issue (9): 224-231.doi: 10.13560/j.cnki.biotech.bull.1985.2015.09.032

• 研究报告 • 上一篇    下一篇

豚鼠和BALB/c小鼠对SEC2超抗原作用敏感性的比较

孟北乾1.2, 张惠文2, 张国俊1.2, 徐明恺2, 李旭2, 张成刚2   

  1. (1.中国科学院大学,北京 100049;2.中国科学院沈阳应用生态研究所,沈阳 110016)
  • 收稿日期:2015-01-11 出版日期:2015-09-15 发布日期:2015-09-16
  • 作者简介:孟北乾,男,硕士研究生,研究方向:口蹄疫疫苗佐剂的研究;E-mail:13995111458@163.com
  • 基金资助:
    十二五国家科技重大专项重大新药创制项目(2012ZX09102301-013),沈阳市科技计划项目(F11-264-1-11,F12-152-9-00)

Comparison of the Superantigen Sensitivity on Staphylococcal Enterotoxins C2 in Guinea Pigs and BALB/c Mice

Meng Beiqian1,2, Zhang Huiwen2, Zhang Guojun1,2, Xu Mingkai2, Li Xu2, Zhang Chenggong1   

  1. (1. University of Chinese Academy of Sciences,Beijing 100049;2. Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016)
  • Received:2015-01-11 Published:2015-09-15 Online:2015-09-16

摘要: 比较分析豚鼠和BALB/c小鼠对金黄色葡萄球菌肠毒素C2(Staphylococcus enterotoxin C2,SEC2)超抗原作用的敏感性差异,确定更适合用于SEC2超抗原作用研究的模式动物。体外试验,以梯度浓度SEC2刺激豚鼠和BALB/c小鼠的外周血单个核细胞(Peripheral blood mononuclear cell,PBMC)和脾淋巴细胞,MTS染色法检测其增殖;体内实验,SEC2腹腔注射豚鼠和BALB/c小鼠,每隔3 d检测豚鼠和小鼠的体重、体温变化情况;每隔7 d采血,ELISA法检测血清中IL-4、IFN-γ、IL-2和TNF-α分泌水平。不同浓度的SEC2均能刺激小鼠的PBMC和脾淋巴细胞显著增殖(P<0.05),而对豚鼠的PBMC和脾淋巴细胞无效。腹腔注射后,SEC2组和对照组豚鼠和小鼠的体温均无显著性变化(P>0.05);豚鼠SEC2组体重在给药后期显著低于对照组(P<0.05),小鼠的SEC2组体重在给药后第3-30天均显著低于对照组(P<0.05),此后恢复到正常水平(P>0.05);给药后各时间点,小鼠的SEC2组血清中细胞因子IL-4、IFN-γ、IL-2和TNF-α的分泌水平均显著高于对照组(P<0.05),而豚鼠的SEC2组血清中细胞因子分泌水平与对照组无显著性差异(P>0.05)。与豚鼠相比,BALB/c小鼠对SEC2超抗原活性的敏感程度更高,且表现出很好的剂量和时间效应,适合作为模式动物用于SEC2的超抗原活性研究。

关键词: 豚鼠, 小鼠, 金黄色葡萄球菌肠毒素C2

Abstract: This work is to analyze and compare the superantigen sensitivity on staphylococcal enterotoxins C2(SEC2)in guinea pigs and BALB/c mice, and determine the model animal for the researches of superantigen sensitivity on SEC2. In vitro, peripheral blood mononuclear cell(PBMC)and splenocytes from guinea pigs and BALB/c mice were respectively stimulated with SEC2 at gradient concentration, and the cell proliferation was tested by MTS assay;In vivo, the changes of temperature and weight of guinea pigs and mice were measured at interval of 3 d after the intraperitoneal injection of SEC2. Meanwhile, the serums were collected at interval of 7 d to detect the levels of IL-4, IFN-γ, IL-2 and TNF-α by ELISA. SEC2 of different concentrations significantly stimulated the proliferation of PBMC and splenocytes from BALB/c mouse(P < 0.05), but not so from guinea pigs(P > 0.05). After intraperitoneal injection of SEC2, there was no significant difference in body temperature of both guinea pigs and mice(P > 0.05)compared to the control. In the later phase of the experiment, the body weights of guinea pigs in SEC2 group were significantly lower than those in control group(P < 0.05). And the body weights of mice in SEC2 group were also significantly lower than those in control group during day 3 to 30, but recovered to normal level at the end of the experiment(P > 0.05). The cytokines IL-4, IFN-γ, IL-2 and TNF-α in serum of mice of SEC2 group were significantly elevated compared with in control group(P < 0.05). However, there was no significant difference in guinea pigs administrated with SEC2 and physiological saline(P > 0.05). In conclusion, comparing with guinea pigs, BALB/c mice are more sensitive to the stimulation of SEC2 with promising dose-dependent and time-dependent manner. Therefore, BALB/c mouse is a suitable model animal for the researches of superantigen activity.

Key words: guinea pig, mouse, staphylococcal enterotoxins C2