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Un gen masculino en el mosquito de la malaria Anopheles gambiae
Elzbieta Krzywinska1, Nathan J Dennison2, Gareth J Lycett3
1The Pirbright Institute, Ash Road, Pirbright, Surrey, GU24 0NF, UK.
Science (New York, N.Y.)
|July 2, 2016
Resumen
Los investigadores identificaron el gen Yob como el factor determinante del macho en los mosquitos Anopheles gambiae. Este gen controla la determinación del sexo y podría usarse para crear cepas de mosquitos solo masculinos para el control de la malaria.
Área de la Ciencia:
- La genética
- Biología molecular
- Entomología
Sus antecedentes:
- Los mecanismos moleculares de determinación del sexo son diversos entre las especies.
- En muchos insectos, un factor M vinculado al cromosoma Y determina la masculinidad, pero su naturaleza a menudo es desconocida.
- El mosquito de la malaria Anopheles gambiae presenta un modelo clave para estudiar la determinación del sexo de los insectos.
Objetivo del estudio:
- Identificar y caracterizar el factor M responsable de la masculinidad en Anopheles gambiae.
- Comprender el papel de este factor en el desarrollo embrionario y la determinación del sexo.
- Explorar su aplicación potencial en las estrategias de control de la malaria.
Principales métodos:
- Aislamiento genético y caracterización de Yob en Anopheles gambiae.
- Análisis de los patrones de expresión génica de Yob durante el desarrollo embrionario.
- Manipulación experimental de la expresión de Yob a través del silenciamiento y el parto ectópico.
Principales resultados:
- El gen Yob fue identificado como el factor M que controla la masculinidad en Anopheles gambiae.
- Yob se activa temprano en la transcripción zigótica y es esencial para el desarrollo masculino.
- Yob controla el empalme específico masculino del gen de doble sexo.
- El silencio de Yob conduce a la letalidad masculina, mientras que la expresión ectópica da como resultado una descendencia solo masculina.
Conclusiones:
- El gen Yob es el principal determinante de la masculinidad en Anopheles gambiae.
- El papel esencial de Yob y su propiedad de matar a las hembras ofrecen una nueva herramienta para el control genético.
- Este descubrimiento tiene implicaciones significativas para el desarrollo de cepas transgénicas de Anopheles para el control del vector de la malaria.
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