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handle: 10261/280977
[ES] La anaplasmosis bovina ocasiona pérdidas cuantiosas a la ganadería en países en desarrollo, y el diseńo de vacunas se ve obstaculizado por la amplia diversidad genética y antigénica que este organismo presenta en cepas de diferentes regiones geográficas. El objetivo del trabajo fue comparar las secuencias de cuatro cepas mexicanas de A. marginale no tipificadas respecto a los genes msp1α y msp4. Se usaron las secuencias de MSP-1a y MSP4, dos de las proteínas del complejo principal de superficie, y que se han usado para estudios filogenéticos. Usando iniciadores específicos, para la región variable del gen msp1α y el gen msp4, se amplificó el ADN de las cepas Pte. de Ixtla, Mor., Aguascalientes, Ags., Pichucalco y Sta. Martha, Chis. El análisis de las secuencias nucleotídicas y de aminoácidos para msp1α reveló una clara similitud entre los aislado Pichucalco y Sta. Martha ambas de Chiapas, al igual que contra los aislados México, Morelos y Veracruz. Los aislados Aguascalientes y Pte. de Ixtla demostraron ser diferentes entre ellos, de las otras cepas mexicanas, y de otros países, mientras que para msp4 no se observó variación en ninguna de las cepas mexicanas hasta el momento reportadas, las cuales contienen 849 pb y coinciden altamente con diversos aislados del mundo. El estudio regional o nacional del grado de conservación de estas proteínas abriría posibilidades para el diseńo de una vacuna con base en este tipo de antígenos y se podría predecir su eficacia.
[EN] Bovine anaplasmosis, due to Anaplasma marginale, is responsible for substantial economic losses in livestock production of developing countries. Vaccine development is hampered by wide genetic and antigenic diversity in strains of distant geographical areas. The objective of the present study was to compare sequences of four non typified Mexican A. marginale strains in respect of msp1α and msp4 genes. Sequences of MSP-1a and MSP4 and major surface complex proteins were used, already used for phylogenetic studies. Through specific initiators, for variable areas of both the msp1α and msp4 genes, DNA of the Pte. de Ixtla, Mor.; Aguascalientes, Ags; Pichucalco and Sta. Martha, Chis. strains was amplified. Analyses of nucleotide sequences and amino acids for msp1α showed a strong similitude between Pichucalco and Sta. Martha, both from Chiapas, same as against the isolates Mexico, Morelos and Veracruz. Isolates Pte. de Ixtla and Aguascalientes were different between them and previously identified Mexican strains and from other countries, while for msp4 no variation was reported for Mexican strains previously reported, which contain 849 pb and coincide with different isolates the world over. Studies comprising either regions or the whole country on the conservation rank of these proteins could open possibilities for vaccines based on these antigens and its efficacy could be predicted.
Este estudio fue financiado con fondos del proyecto SEP-CONACYT No. 44565.
Peer reviewed
Anaplasma marginale, MSP1a, Biología, Veterinary medicine, MSP4, SF600-1100, Major surface complex, Complejo mayor de superficie, SF1-1100, Animal culture
Anaplasma marginale, MSP1a, Biología, Veterinary medicine, MSP4, SF600-1100, Major surface complex, Complejo mayor de superficie, SF1-1100, Animal culture
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