华西口腔医学杂志

• 基础研究 • 上一篇    下一篇

葡糖基转移酶多肽疫苗HDS免疫大鼠的实验研究

丁芸,凌均棨,陈罕   

  1. 510060 中山大学光华口腔医院牙体牙髓科
  • 收稿日期:2003-10-25 修回日期:2003-10-25 出版日期:2003-10-20 发布日期:2003-10-20
  • 作者简介:
  • 基金资助:
    本课题为广东省自然科学基金资助项目(编号001417)

The Study of Peptide Vaccine HDS fromStreptococcus mutansGlucosyltransferase

DING Yun,LINGJunqi,CHENHan   

  1. Conservative andEndodontic Department,College ofStomatology,Sun Yat-sen University ofMedical Sciences,Guangzhou510060,China
  • Received:2003-10-25 Revised:2003-10-25 Online:2003-10-20 Published:2003-10-20

摘要:

目的 动物体内研究葡糖基转移酶多肽疫苗HDS免疫原性和防龋效果。方法 构建大鼠人工龋模型,分别用人工抗原HDS-KLH,多肽抗原HDS,葡糖基转移酶(GTF)免疫大鼠,酶联免疫吸附法检测大鼠血清和唾液中抗HDS、GTF抗体;体视显微镜下观察各组大鼠磨牙龋坏情况,并用Keyes计分法计分。结果 HDS-KLH免疫组大鼠唾液、血清中抗HDS IgG和IgA水平均高于对照组(P<0·05);HDS-KLH,HDS,GTF免疫组大鼠龋Keyes计分均低于对照组(P<0·01),光滑面防龋效果最为显著。结论 人工抗原HDS-KLH能刺激机体产生针对GTF的保护性免疫,并减少实验大鼠龋齿发生。

关键词: 龋病, 变形链球菌, 葡糖基转移酶, 多肽, 疫苗

Abstract:

Objective To investigate the antigenicity of the peptide vaccineHDS fromStreptococcus mutansglucosyltrans- ferase and its ability to induce protective immune responses in an experimental ratmodel of dental caries.Methods Artificial an- tigenHDS-KLH, peptide HDS, glycosyltransferase were injected to immunize rats. Measurement of the specific anti-HDS,GTF IgG or IgA concentration in saliva and serumwere undertaken by ELISAamongthe experimental groups. Gnotobiotic ratmodelwas developed when challengedS.mutansand a caries promoting diet. The jaws of the ratswere selected and dyed. The Keyes caries score for each jawwere counted.Results The level of serum and salivary specific anti-HDS IgG and IgA in the group immunized by HDS-KLHwas significantly higher than that in control group (P<0·05). The Keyes caries score of GTF,HDS andHDS-KLH immunized group were significantly lowerthan that of control group, especially lower in smooth tooth surface.Conclusion Artifi- cial antigen HDS-KLH could induce immune response. As a peptide vaccine, HDS-KLH could reduce the caries incidence in ex- perimental rat model.

Key words: caries, Streptococcus mutans, glycosyltransferase, vaccine