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Los discos imaginarios secretan el péptido 8 parecido a la insulina para mediar la plasticidad del crecimiento y la
Andres Garelli1, Alisson M Gontijo, Veronica Miguela
1Instituto de Neurociencias, Consejo Superior de Investigaciones Científicas-Universidad Miguel Hernández de Elche, Sant Joan d'Alacant, 03550 Alicante, Spain.
Science (New York, N.Y.)
|May 5, 2012
Resumen
Los animales en desarrollo usan DILP8, un péptido similar a la insulina de Drosophila, para comunicar el crecimiento anormal y retrasar la maduración, asegurando el tamaño adulto normal y la estabilidad del desarrollo. Este péptido es clave para mantener la robustez del organismo durante las alteraciones del crecimiento.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Biología del insecto Biología del insecto
- Genética La genética.
Sus antecedentes:
- Los animales en desarrollo exhiben plasticidad para garantizar un tamaño adulto normal a pesar de las alteraciones del crecimiento.
- La comunicación de los tejidos y órganos es crucial para mantener las proporciones y la simetría durante el desarrollo.
Objetivo del estudio:
- Investigar los mecanismos moleculares subyacentes a la plasticidad del desarrollo y la regulación del tamaño en Drosophila.
- Para identificar las vías de señalización que coordinan el crecimiento y la maduración en respuesta a las perturbaciones del desarrollo.
Principales métodos:
- Utilizó Drosophila melanogaster como organismo modelo.
- Investigó el papel del péptido 8 parecido a la insulina de Drosophila (DILP8) en el crecimiento y la metamorfosis.
- Se analizaron los efectos de DILP8 en la biosíntesis de ecdisona y el crecimiento del disco imaginal.
Principales resultados:
- Los discos imaginarios activan autónomamente DILP8 para señalar un crecimiento anormal y retrasar la metamorfosis.
- DILP8 inhibe la biosíntesis de ecdisona, ralentiza el crecimiento del disco imaginario y asegura un tamaño adulto normal.
- La pérdida de la función DILP8 da como resultado individuos asimétricos con variación de tamaño y tiempo de maduración alterado.
Conclusiones:
- DILP8 es un mediador crítico de la plasticidad del desarrollo, garantizando la robustez y la estabilidad del desarrollo.
- DILP8 funciona como una señal de largo alcance para coordinar el crecimiento y el tiempo de desarrollo.
- La vía DILP8 es fundamental para la maquinaria que mantiene el crecimiento proporcional y la homeostasis de tamaño.
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