title: Sequence analysis and PCR-RFLP profiling of the hsp70 gene as a valuable tool for identifying Leishmania species associated with human leishmaniasis in Brazil.
abstract: Since the first report of the genus Leishmania, many species have been described. In Brazil, human leishmaniasis has been associated with eight Leishmania species, of which seven are responsible for cutaneous leishmaniasis (CL). In some endemic areas, CL is associated with only one species; however, in other areas, such as the Amazon, the etiology of CL can be assigned to many species. The multitude of highly similar Leishmania species in Brazil makes it difficult to develop an appropriate method of typing them. Most Leishmania species were first described based on epidemiological and biological characteristics, and these were later corroborated by Multilocus Enzyme Electrophoresis (MLEE), the gold standard technique for identifying Leishmania species. In an attempt to overcome the limitations of MLEE, many PCR-based methods have been developed and used for parasite identification. In the present study, we analyzed the sequence of the hsp70 gene in Leishmania species associated with human leishmaniasis in Brazil. This analysis led to the identification of restriction enzymes that could be used for PCR-RFLP-based identification. The results obtained were in complete agreement with those obtained by MLEE, suggesting that PCR-RFLP analysis of hsp70 could soon replace MLEE for routine Leishmania typing.
authors.affiliation: Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, FIOCRUZ, Av. Brasil 4365, Manguinhos, 21045-900 Rio de Janeiro, RJ, Brazil.
authors.forename: Leonardo Alves
authors.initials: LA
authors.lastname: da Silva
authors.forename: Cíntia Dos Santos
authors.initials: Cdos S
authors.lastname: de Sousa
authors.forename: Grazielle Cardoso
authors.initials: GC
authors.lastname: da Graça
authors.forename: Renato
authors.initials: R
authors.lastname: Porrozzi
authors.forename: Elisa
authors.initials: E
authors.lastname: Cupolillo
mesh_terms: D001938:Brazil / Q000453:epidemiology; D016054:DNA, Protozoan / Q000032:analysis / Q000235:genetics; D020869:Gene Expression Profiling; D005838:Genotype; D018840:HSP70 Heat-Shock Proteins / Q000235:genetics; D006801:Humans; D007891:Leishmania / Q000145:classification / Q000235:genetics*; D007896:Leishmaniasis / Q000235:genetics*; D016133:Polymerase Chain Reaction / Q000379:methods*; D012150:Polymorphism, Restriction Fragment Length; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D016054:DNA, Protozoan; D018840:HSP70 Heat-Shock Proteins