English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/114616

Sequence analysis of the 3-untranslated region of HSP70 (type I) genes in the genus Leishmania: Its usefulness as a molecular marker for species identification

AutorRequena, José María; Chicharro, Carmen ; García, Lineth; Parrado, Rudy; Puerta, Concepción J.; Cañavate, Carmen
Palabras claveMicrosatellites
Sequence analysis
Phylogenetic analysis
Fecha de publicación2012
EditorBioMed Central
CitaciónParasites and Vectors 5: 87 (2012)
ResumenBackground: The Leishmaniases are a group of clinically diverse diseases caused by parasites of the genus Leishmania. To distinguish between species is crucial for correct diagnosis and prognosis as well as for treatment decisions. Recently, sequencing of the HSP70 coding region has been applied in phylogenetic studies and for identifying of Leishmania species with excellent results. Methods: In the present study, we analyzed the 3-untranslated region (UTR) of Leishmania HSP70-type I gene from 24 strains representing eleven Leishmania species in the belief that this non-coding region would have a better discriminatory capacity for species typing than coding regions. Results: It was observed that there was a remarkable degree of sequence conservation in this region, evenbetween species of the subgenus Leishmania and Viannia. In addition, the presence of many microsatellites was a common feature of the 3-UTR of HSP70-I genes in the Leishmania genus. Finally, we constructed dendrograms based on global sequence alignments of the analyzed Leishmania species and strains, the results indicated that this particular region of HSP70 genes might be useful for species (or species complex) typing, improving for particular species the discrimination capacity of phylogenetic trees based on HSP70 coding sequences. Given the large size variation of the analyzed region between the Leishmania and Viannia subgenera, direct visualization of the PCR amplification product would allow discrimination between subgenera, and a HaeIII-PCR-RFLP analysis might be used for differentiating some species within each subgenera. Conclusions: Sequence and hylogenetic analyses indicated that this region, which is readily amplified using a single pair of primers from both Old and New World Leishmania species, might be useful as a molecular marker for species discrimination. © 2012 Requena et al.; licensee BioMed Central Ltd.
Identificadoresdoi: 10.1186/1756-3305-5-87
issn: 1756-3305
Aparece en las colecciones: (CBM) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
JM_Requena_Sequence_analysis.pdf516,95 kBAdobe PDFVista previa
Mostrar el registro completo

Artículos relacionados:

NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.