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Protocol for Production of a Genetic Cross of the Rodent Malaria Parasites
Published on: January 4, 2011
El genoma del parásito de la malaria simio y humano Plasmodium knowlesilesi
1Wellcome Trust Sanger Institute, Genome Campus, Hinxton, Cambridgeshire CB10 1SA, UK. ap2@sanger.ac.uk
Nature
|October 10, 2008
Resumen
El genoma de Plasmodium knowlesi revela genes de antígeno variante dispersos, a diferencia de otras especies de Plasmodium. Este mono es el parásito de la malaria.
Área de la Ciencia:
- Malariología Malariología.
- La genómica es la genómica.
- Parasitología Parasitología.
Sus antecedentes:
- Plasmodium knowlesi es un parásito de malaria de mono que causa cada vez más infecciones humanas en el sudeste asiático.
- Comparte una relación filogenética con Plasmodium vivax, pero exhibe rasgos fenotípicos distintos.
- La variación antigénica se demostró por primera vez en Plasmodium knowlesi.
Objetivo del estudio:
- Para presentar el análisis de la secuencia del genoma nuclear de Plasmodium knowlesi (estirpe H, clon Pk1(A+).
- Para permitir la genómica comparativa con Plasmodium vivax y otras especies de Plasmodium.
- Para investigar la base genómica de la variación antigénica en P. knowlesi.
Principales métodos:
- Secuenciación del genoma entero del Plasmodium knowlesi (estirpe H, clon Pk1(A+).
- Análisis bioinformático de la secuencia del genoma nuclear.
- Análisis genómico comparativo con otras especies de Plasmodium.
Principales resultados:
- Esta es la primera secuencia del genoma descrita de un parásito de malaria de mono.
- Las familias de antígenos variantes putativas están dispersas en todo el genoma de P. knowlesi, asociadas con las repeticiones de telómeros.
- La familia KIR de antígenos variantes muestra homología de secuencia con el dominio extracelular del huésped CD99, lo que sugiere una imitación molecular.
Conclusiones:
- El genoma de P. knowlesi proporciona un valioso recurso para estudios comparativos con otras especies de Plasmodium.
- La organización genómica de las familias de antígenos variantes en P. knowlesi difiere significativamente de otras especies de Plasmodium.
- El mimetismo molecular sugerido por las secuencias KIR puede representar una nueva estrategia de evasión inmune en Plasmodium knowlesi.
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