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Secuenciación del genoma completo identifica variantes de HOXD13 en pedigríes de sindactilia
Yi-Feng Xu1, Jing Zhang2, Tian-Ying Wei1
1Beijing Jiaen Hospital, Heen Life Medical Research Institute, Beijing, China.
Human genomics
|December 25, 2025
Resumen
La secuenciación del genoma completo (WGS) identificó nuevas variantes de HOXD13, incluidas expansiones de polialanina, en casos de sindactilia pasados por alto por métodos estándar. Esto mejora el diagnóstico genético de malformaciones de las extremidades.
Área de la Ciencia:
- Genética
- Biología Molecular
- Biología del Desarrollo
Sus antecedentes:
- La sindactilia presenta una heterogeneidad genética significativa, a menudo elude el diagnóstico molecular.
- El gen HOXD13 está implicado, sin embargo, los métodos convencionales pasan por alto ciertos tipos de variantes.
Objetivo del estudio:
- Investigar nuevas variantes de HOXD13 en sindactilia utilizando secuenciación avanzada.
- Mejorar las capacidades de diagnóstico molecular para malformaciones de las extremidades.
Principales métodos:
- Secuenciación integrada del exoma completo (WES) y secuenciación del genoma completo (WGS).
- El análisis se centró en la identificación de deleciones y expansiones de polialanina (PAE) en HOXD13.
Principales resultados:
- Se identificaron tres nuevas variantes de HOXD13: una deleción (c.314_315del) y dos PAE (c.186_212dup, c.203_204insAGCAGCGGCGGCTGCGGCGGCGGC).
- La secuenciación del genoma completo (WGS) detectó variantes crípticas pasadas por alto por la secuenciación del exoma completo (WES).
Conclusiones:
- La secuenciación del genoma completo (WGS) es crucial para identificar variantes complejas de HOXD13.
- Las expansiones de polialanina en HOXD13 se correlacionan con malformaciones de las extremidades, lo que ayuda al diagnóstico.
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