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Rotación axial comprende torsión y flexión concurrentes como componentes morfogenéticos distintos en Ciona
Yuki S Kogure1, Satoru Okuda2, Kotaro Oka3
1Department of Biosciences and Informatics, Faculty of Science and Technology, Keio University, Japan.
Developmental biology
|December 12, 2025
Resumen
La rotación axial (RA) en cordados implica flexión hacia la izquierda y torsión en sentido horario. La señalización TGF-β es crucial para coordinar esta torsión, esencial para la morfogénesis del eje corporal.
Área de la Ciencia:
- Biología del Desarrollo
- Embrionogénesis de Cordados
- Morfogénesis
Sus antecedentes:
- La rotación axial (RA) es un movimiento morfogenético clave en cordados, esencial para remodelar el eje corporal.
- Los detalles geométricos y los mecanismos reguladores de la RA no se comprenden completamente.
Objetivo del estudio:
- Disecar los componentes y mecanismos reguladores de la rotación axial (RA) en el cordado Ciona robusta.
- Investigar el papel de la señalización TGF-β en la RA.
Principales métodos:
- Se utilizaron embriones de Ciona robusta para estudiar la RA.
- Se compararon embriones con y sin corion.
- Se inhibió la señalización de TGF-β utilizando SB431542.
- Se realizó un análisis cuantitativo de los ángulos de torsión.
Principales resultados:
- La RA comprende componentes distintos de flexión hacia la izquierda y torsión en sentido horario.
- La descorionación aleatorizó la flexión pero no la dirección de la torsión.
- La inhibición de TGF-β aleatorizó tanto la flexión como la torsión.
- La torsión se genera intrínsecamente, mientras que la señalización de TGF-β asegura la coordinación global.
Conclusiones:
- La rotación axial en Ciona implica una flexión y torsión coordinadas.
- La señalización de TGF-β juega un papel crítico en la dirección de la coordinación global de la torsión durante la RA.
- Los hallazgos proporcionan información sobre la base biomecánica y molecular del desarrollo del plan corporal de los cordados.
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