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Los genes Hox de cefalópodos y el origen de las novedades morfológicas
Patricia N Lee1, Patrick Callaerts, Heinz G De Couet
1Department of Zoology, University of Hawaii at Manoa, 2538 McCarthy Mall, Honolulu, Hawaii 96822, USA.
Nature
|August 29, 2003
Resumen
Los genes Hox, cruciales para el patrón corporal, fueron reutilizados repetidamente durante la evolución de los cefalópodos. Este estudio en Euprymna scolopes revela cómo estos genes reguladores impulsan el desarrollo de nuevas estructuras de cefalópodos.
Área de la Ciencia:
- Biología del desarrollo evolutivo Biología del desarrollo evolutivo
- Genómica y biología molecular.
- Biología marina Biología marina.
Sus antecedentes:
- Los cefalópodos, un grupo diverso de moluscos, desarrollaron planes corporales únicos a través de innovaciones clave.
- El reclutamiento de genes reguladores es un mecanismo potencial para generar nuevas estructuras durante la evolución.
- Los genes Hox son vitales para el patrón axial en los bilaterales, pero pueden ser cooptados para nuevas funciones.
Objetivo del estudio:
- Para investigar los patrones de expresión del desarrollo de los genes Hox en el calamar bobtail hawaiano (Euprymna scolopes).
- Comprender el papel del reclutamiento de genes Hox en la evolución de nuevas estructuras de cefalópodos.
- Para obtener información sobre los mecanismos moleculares que impulsan el cambio morfológico en Lophotrochozoa.
Principales métodos:
- Se utilizó la hibridación in situ de montaje completo para examinar la expresión de ocho genes Hox.
- Se analizaron los patrones de expresión del desarrollo en Euprymna scolopes.
- Análisis comparativo de las funciones del gen Hox en la evolución de los cefalópodos.
Principales resultados:
- Se descubrió que los ortólogos del gen Hox eran reclutados repetidamente para diversas funciones de desarrollo en Euprymna scolopes.
- Se identificaron múltiples instancias de cooptación del gen Hox en el origen de nuevas estructuras de cefalópodos.
- Los patrones de expresión sugieren una diversificación funcional significativa de los genes Hox en la evolución de los cefalópodos.
Conclusiones:
- El reclutamiento del gen Hox es un factor significativo en la evolución de la nueva morfología de cefalópodos.
- El estudio proporciona información sobre la base molecular de la innovación morfológica en los moluscos.
- Comprender la cooptación del gen Hox arroja luz sobre los procesos evolutivos dentro de los Lophotrochozoa.
Palabras clave:
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