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p63 es un homólogo de p53 requerido para la morfogénesis de las extremidades y la epidermis
1Howard Hughes Medical Institute, Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas 77030, USA.
Nature
|May 5, 1999
Resumen
El supresor tumoral p63 es crucial para el desarrollo embrionario, regulando la formación de la piel y las extremidades. A diferencia de p53, p63 es esencial para la diferenciación ectodérmica, y su ausencia causa graves defectos de desarrollo en ratones.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Genética molecular genética molecular.
- Diferenciación celular Diferenciación celular Diferenciación celular
Sus antecedentes:
- El supresor tumoral p53 regula el ciclo celular y la apoptosis en respuesta a estímulos como el daño al ADN.
- Los ratones que carecen de p53 tienen un desarrollo normal, lo que sugiere una compensación funcional por proteínas relacionadas durante la embriogénesis.
- p63 y p73 son homólogos conocidos de p53.
Objetivo del estudio:
- Para investigar la función in vivo del homólogo de p53, p63, durante el desarrollo embrionario.
- Determinar si la p63 juega un papel en procesos en los que la p53 parece prescindible.
Principales métodos:
- Generación y análisis de ratones con deficiencia de p63.
- Examen histológico de defectos de desarrollo en embriones p63-null.
- Evaluación de los marcadores de estratificación y diferenciación de la piel.
Principales resultados:
- Los ratones que carecen de p63 sobreviven al nacimiento, pero presentan graves anomalías del desarrollo.
- El desarrollo de las extremidades se detiene, se caracteriza por la ausencia o truncamiento de las extremidades debido a la diferenciación fallida de la cresta ectodérmica apical.
- El desarrollo de la piel está deteriorado, carece de marcadores de estratificación y diferenciación.
- Las estructuras epidermo-mesenquimales esenciales como los folículos pilosos, los dientes y las glándulas mamarias están ausentes.
Conclusiones:
- p63 es indispensable para múltiples aspectos de la diferenciación ectodérmica durante la embriogénesis.
- A diferencia de la p53, la p63 juega un papel crítico y no redundante en el desarrollo embrionario.
- La función de p63 es vital para la formación de piel, apéndices y otros derivados ectodérmicos.
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