• 医学文献
  • 知识库
  • 评价分析
  • 全部
  • 中外期刊
  • 学位
  • 会议
  • 专利
  • 成果
  • 标准
  • 法规
  • 临床诊疗知识库
  • 中医药知识库
  • 机构
  • 作者
热搜词:
换一批
论文 期刊
高级检索

检索历史 清除

Expression and immunogenicity of recombinant Mycobacterium bovis Bacillus Calmette-Guérin strains secreting the antigen ESAT-6 from Mycobacterium tuberculosis in mice

摘要:

Background Tuberculosis remains the leading cause of human death. Currently, Bacillus Calmette-Guérin (BCG) is the only available vaccine against tuberculosis but its efficacy is highly variable. Thus, developing new tuberculosis vaccines becomes an urgent task. In this study, we evaluated in BALB/c mice the humoral and cellular immune responses of recombinant BCG expressing the antigen ESAT-6 from Mycobacterium tuberculosis.Methods Escherichia coli-BCG shuttle plasmid named pDE22-esat-6 was constructed by inserting the BamHI/EcoRI digested esat-6 gene PCR product into the similarly digested parental plasmid pDE22. BCG cells were transformed with pDE22-esat-6, which was named recombinant BCG (rBCG). BALB/c mice were immunized subcutaneously on the back with 100 μl normal saline containing 106 CFU of BCG or rBCG. They were sacrificed after 4 weeks to detect their humoral and cellular responses.Results There was no any significant differences in the growth characteristics between the conventional BCG and rBCG. In immunized mice, the IgG antibody titres of rBCG group were as high as 1:8000, which was significantly higher than that in BCG group (1:1400, P<0.05). The elicited IFN-γ level of rBCG group was (1993±106) pg/ml, which was also significantly higher than that in BCG group ((1463±105) pg/ml, P<0.05). The splenocyte proliferation index of rBCG group reached 4.34±0.31, which was higher than that of BCG group (3.79±0.24, P<0.05).Conclusion rBCG secreted expressing antigen ESAT-6 stimulated stronger humoral and cellular immune responses than BCG did, and, therefore may be the better vaccine against mycobacterium tuberculosis.

更多
作者单位: Department of Microbiology,Fourth Military Medical University,Xi'an 710032,China [1] Department of Pathogenic Biology,Tongji Medical College,Huazhong University of Science and Technology,Wuhan 430030,China [2]
期刊: 《中华医学杂志(英文版)》2007年120卷14期 1220-1225页 SCISCIEMEDLINEISTICCSCDCABP
分类号: R2
栏目名称: ORIGINAL ARTICLES
发布时间: 2007-08-30
基金项目:
国家自然科学基金 国家高技术研究发展计划(863计划)
  • 浏览:104
  • 下载:0

加载中!

相似文献

  • 中文期刊
  • 外文期刊
  • 学位论文
  • 会议论文

加载中!

加载中!

加载中!

加载中!

扩展文献

特别提示:本网站仅提供医学学术资源服务,不销售任何药品和器械,有关药品和器械的销售信息,请查阅其他网站。

  • 客服热线:4000-115-888 转3 (周一至周五:8:00至17:00)

  • |
  • 客服邮箱:yiyao@wanfangdata.com.cn

  • 违法和不良信息举报电话:4000-115-888,举报邮箱:problem@wanfangdata.com.cn,举报专区

北京万方数据股份有限公司

万方数据电子出版社

京ICP证010071号

京公网安备11010802020237号

京ICP备08100800号-1

违法和不良信息举报电话:4000-115-888,举报邮箱:problem@wanfangdata.com.cn,举报专区

充值 订阅 收藏 移动端 使用
帮助