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Regulación interdigital de la identidad de dígitos y la transformación homeótica por medio de la señalización BMP
1Department of Anatomy, University of Wisconsin, 1300 University Avenue, Madison, WI 53706, USA.
Science (New York, N.Y.)
|July 21, 2000
Resumen
La identidad digital en el desarrollo de las extremidades está determinada por las señales del mesodermo interdigital, no por las propiedades fijas del propio dígito. La señalización de la proteína morfogénica ósea (BMP) juega un papel clave en la especificación de estas identidades.
Área de la Ciencia:
- Biología del desarrollo Biología del desarrollo.
- Desarrollo Limb desarrollo Limb.
- Formación de patrones en la formación de patrones.
Sus antecedentes:
- Los mecanismos que especifican la identidad de los dígitos durante el desarrollo de las extremidades siguen siendo poco conocidos a pesar de décadas de investigación.
- Las suposiciones anteriores sugerían que la identidad de dígitos era intrínseca al desarrollo del dígito primordial.
Objetivo del estudio:
- Para investigar la fuente de las señales que determinan la identidad digital en el desarrollo de las extremidades.
- Aclarar el papel de los tejidos interdigitales y las vías de señalización en la especificación de la identidad de los dígitos.
Principales métodos:
- Se realizaron experimentos con modelos de desarrollo de patas de pollo.
- Se analizó el tejido mesodérmico interdigital por su papel en el patrón.
- Las vías de señalización de la proteína morfogénica ósea (BMP) fueron inhibidas para observar los efectos en la identidad de los dígitos.
Principales resultados:
- La identidad digital es especificada por el mesodermo interdigital, no fijado dentro del dígito primordial.
- Los interdígitos más posteriores proporcionan pistas para las identidades digitales más posteriores.
- La inhibición de la señalización interdigital BMP alteró la identidad de dígitos resultante.
Conclusiones:
- El mesodermo interdigital modela activamente la identidad de los dígitos antes de su regresión.
- El desarrollo del dígito está influenciado por las señales posicionales más posteriores recibidas del mesodermo interdigital.
- La señalización BMP es una vía molecular crucial involucrada en especificar la identidad de los dígitos durante el desarrollo de las extremidades.
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