摘要
目的 探讨对沙眼衣原体更为简便的分型方法及基因分型的临床意义。方法 利用聚合酶链反应 (PCR)扩增沙眼衣原体外膜蛋白基因 (omp1 )片段 ,以核酸内切酶作酶切 ,1 0 %聚丙烯酰胺凝胶电泳 ,银染色后观察带型分布。结果 扩增 1 5种血清型omp1基因 ,产物为 871bp的DNA片段。用AluⅠ酶切此片段 ,观察到 1 5种血清型呈现具有特征性的带型分布 ,但C组带型较难区别。再用HpaⅡ、HinfⅠ及EcoRⅠ三重酶切 ,则可将C组各型完全区分开来。对 74株沙眼衣原体临床株进行分型 ,发现E ,F ,G ,D在本观察人群中占优势 ,偶尔 ,也见到B ,H ,J等型别。还观察到 1例F/D混合型。沙眼衣原体的型别与临床表现之间未见有明显的关联 ,但发现D型感染者常为抗沙眼衣原体抗体高滴度者。
Objectives To test a simple method for genotyping of C.trachomatis isolates and to investigate the clinical significance of the genotypes. Methods A part of the chlamydial genome encoding the major outer membrane protein(omp1) was amplified by polymerase chain reaction (PCR). The products were digested by endonucleases to see the characteristic patterns, after silver staining on 10% polyacrylamide gels. Results The omp1 genes of 15 serovars of C. trachomatis were amplified by PCR,which generated an 871 base pair gene fragment. AluⅠ digestion of the product gave characteristic patterns for the 15 serovars,but group C presented closely similar patterns. A triple digestion with HpaⅡ, followed by HinfⅠ and EcoRⅠ, would allow the differentiation of serovars in group C. Analysis of 74 clinical isolates revealed serovars E, F, D, G as the most prevalent genital serovars in the studied populations. Serovars B, H, J were occasionally identified. A mixed infection with serovars F and D was seen in a clinical sample. No significant relationship was observed between clinical manifestations of urogenital chlamydial infections and serovars,however,serovar D was more often associated with high titer of anti chlamydial antibody than other serovars. Conclusion The omp1 genotyping technique seems to be promising for epidemiological studies.
出处
《中华皮肤科杂志》
CAS
CSCD
北大核心
1998年第3期156-159,共4页
Chinese Journal of Dermatology
