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Una nueva variante del gen STAG1 y revisión de la literatura

Meihua Xie¹, Liyun Xie¹, Jianlong Zhuang²

¹Yueyang Central Hospital include the Obstetrics Department and the Laboratory Department, Hunan Province, China.

Annals of human genetics

|September 3, 2025

Resumen

Los investigadores identificaron una nueva variante genética, c.1027-2A>G en el gen STAG1, relacionada con el trastorno del desarrollo intelectual. Este descubrimiento arroja luz sobre las causas genéticas de las enfermedades del desarrollo neurológico.

Área de la Ciencia:

La genética
Trastornos del desarrollo neurológico
Biología molecular

Sus antecedentes:

La discapacidad intelectual, el retraso del habla y los problemas de comportamiento pueden derivarse de factores genéticos complejos.
La identificación de variantes genéticas específicas es crucial para comprender los mecanismos de la enfermedad.

Objetivo del estudio:

Investigar la base genética de la discapacidad intelectual de un niño, retrasos en el desarrollo y trastorno obsesivo-compulsivo.
Identificar nuevas variantes genéticas que contribuyen a estas condiciones de desarrollo neurológico.

Principales métodos:

Se usó la secuenciación de variantes del cariotipo y del número de copias (CNV-seq) para detectar anomalías cromosómicas.
La secuenciación completa del exoma (WES) identificó variantes genéticas dentro de la familia.
Los ensayos de matriz Minigene confirmaron el impacto funcional de la variante STAG1 identificada en el empalme genético.

Principales resultados:

No se detectaron anomalías cromosómicas mediante cariotipo o CNV-seq.
La secuenciación completa del exoma reveló una variante de empalme patógena probable de novo (c.1027-2A>G) en el gen STAG1 en el paciente.
El análisis funcional confirmó que la variante STAG1 interrumpe el empalme y conduce a una terminación prematura del codón.

Conclusiones:

Se identificó una nueva variante patógena en el gen STAG1, c.1027-2A>G.
Esta variante está asociada con un trastorno del desarrollo intelectual, autosómico dominante 47 (MRD47).
Los hallazgos contribuyen a la comprensión de la etiología genética de los trastornos del desarrollo neurológico.

Palabras clave:

El MRD47 El gen STAG1 minigénero secuenciación del exoma entero

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