Baptista C, Schubach A O, Madeira M F, Leal C A, Pires M Q, Oliveira F S, Conceição-Silva F, Rosalino C M V, Salgueiro M M, Pacheco R S
Centro de Referência em Leishmanioses, Instituto de Pesquisa Clínica Evandro Chagas, IPEC/Fiocruz, Av. Brasil, 4365, Rio de Janeiro, CEP 21040-900, Brazil.
Exp Parasitol. 2009 Apr;121(4):317-22. doi: 10.1016/j.exppara.2008.12.006. Epub 2008 Dec 16.
Analyses of MLEE, RAPD and LSSP-PCR were used to compare the panel of american tegumentary leishmaniasis (ATL) isolates obtained from lesions of patients with rare clinical manifestations of the disease and typical lesions. All of the 34 samples analyzed by MLEE demonstrated similar electromorphic profiles with Leishmania (Viannia) braziliensis reference strain. Through the RAPD analysis, nine genetic profiles (genotypes) were identified. LSSP-PCR corroborates the initial screening and phenetic analysis has grouped the isolates into two major clusters comprising the nine different genotypes. Prevalent genotype defined as LbmtDNAgen1 was detected in the largest number of isolates. There was no association between genotypes and clinical symptoms. However, two different genotypes could be identified in the initial (LbmtDNAGen9) and reactivated lesion (LbmtDNAGen3) of the same patient. Our results support the idea of a less pronounced genotypic diversity among L. (V.) braziliensis circulating in the State of Rio de Janeiro and demonstrate the useful application of these molecular markers in genetics variability studies.
运用多位点酶电泳(MLEE)、随机扩增多态性DNA分析(RAPD)和长片段单链构象多态性聚合酶链反应(LSSP-PCR),对从患有该疾病罕见临床表现的患者病变以及典型病变中获取的一组美洲皮肤利什曼病(ATL)分离株进行比较。通过MLEE分析的所有34个样本均显示出与巴西利什曼原虫(维安亚利什曼原虫)参考菌株相似的电泳图谱。通过RAPD分析,鉴定出了9种遗传图谱(基因型)。LSSP-PCR证实了初步筛选结果,并且表型分析已将分离株分为两个主要聚类,包含9种不同基因型。在数量最多的分离株中检测到定义为LbmtDNAgen1的流行基因型。基因型与临床症状之间没有关联。然而,在同一患者的初始病变(LbmtDNAGen9)和复发病变(LbmtDNAGen3)中可鉴定出两种不同的基因型。我们的结果支持在里约热内卢州流行的巴西利什曼原虫(维安亚利什曼原虫)之间基因型多样性不太明显的观点,并证明了这些分子标记在遗传变异性研究中的有用应用。
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