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本研究自新疆克拉玛依地区皮肤利什曼病（ＣＬ）患者的皮肤病变组织内抽取微量的利什曼原虫ｋＤＮＡ，采用引物１３Ａ、１３Ｂ进行ＰＣＲ扩增，获１２０ｈＰ扩增产物（ＣＬ－ＰＣＲ－ＡＰ），并转移到尼龙膜上，分别与地高辛（Ｄｉｇｏｘｉｇｅｎｉｎ－１１－ｄＵＴＰ）标记的Ｌ．ｔｒｏｐｉｃａ、Ｌ．ｉｎｆａｎｔｕｍ、Ｌ．ｇｅｒｂｉｌｌｉ、Ｌ．ｍａｊｏｒｋＤＮＡ探针进行Ｓｏｕｔｈｅｒｎ印迹杂交，结果可见病变组织内ｋＤＮＡＰＣＲ－ＡＰ仅与Ｌ．ｔｒｏｐｉｃａｋＤＮＡ探针有明显的杂交信号带，提示该地区皮肤利什曼病病原体ｋＤＮＡ与Ｌ．ｔｒｏｐｉｃａ有较强的同源性。为进一步分析该病原体与Ｌ．ｉｎｆａｎｔｕｍ和Ｌ．ｄｏｎｏｖａｎｉ新疆各分离株的同源关系，我们采用杜氏利什曼原虫（Ｌ．ｄ）种特异引物Ⅰ和Ⅱ对患者病变组织进行ＰＣＲ扩增，未见扩增产物。用地高辛标记的ＣＬ－ＰＣＲ－ＡＰ探针对Ｌ．ｄｏｎｏｖａｎｉ新疆各分离株进行打点杂交，结果显示该地区ＣＬ病原体与Ｌ．ｄｏｎｏｖａｎｉ新疆分离株以及其它利什曼原虫呈阴性反应。以上结果证实Ｌ．ｔｒｏｐｉｃａｋＤＮＡ与克拉玛依地区ＣＬ患者的ＣＬ－ＰＣＲ－ＡＰ之间的同源关系。
In this study, a small amount of Leishmania kDNA was extracted from skin lesions of skin leishmaniasis (CL) patients in Karamay area of Xinjiang. PCR amplification was carried out using primers 13A and 13B. A 120 hP amplification product (CL-PCR-AP ) And transferred to nylon membrane and labeled with Digoxigenin-11-dUTP. tropica, L. infantum, L. gerbilli, L. Southern blotting was performed using the majork DNA probe. As a result, the kDNA PCR-AP was only found in the diseased tissue. Tropicak DNA probe obvious hybridization signal band, suggesting that the region of skin leishmaniasis pathogen kDNA and L. Tropica has a strong homology. To further analyze the pathogen and L. infantum and L. donovani Xinjiang strains homologous relationship, we use Leishmania donovani (L.d) species-specific primers Ⅰ and Ⅱ lesions of patients with PCR amplification, no amplification products. Ligand-labeled CL-PCR-AP probe pair L. donovani Xinjiang strains were dotted hybridization, the results show that the region CL pathogens and L. donovani Xinjiang isolate and other Leishmania-negative reactions. The above results confirm L. homology between tropicak DNA and CL-PCR-AP in patients with CL in Karamay.