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Methylation is a phase II biotransformation process involving the attachment of a methyl group to a substrate. Enzymes known as methyltransferases orchestrate this reaction.
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Video Experimental Relacionado

Updated: Feb 4, 2026

Laser Capture Microdissection of Mammalian Tissue
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Microdisección Láser Seguida de Perfilado de Metilación de ADN

Lu Liu1, Yingchuo Hu2,3,4, Chunhong Zheng5

  • 1Changping Laboratory, Beijing, China. luliu@cpl.ac.cn.

Methods in molecular biology (Clifton, N.J.)
|February 2, 2026
PubMed
Resumen

Combinamos la microdisección láser con la Metilación Enzimática-seq (EM-seq) para analizar la metilación del ADN en células raras. Este método proporciona datos epigenéticos de alta calidad a partir de tan solo 100 células para el descubrimiento de biomarcadores y la medicina personalizada.

Palabras clave:
Conversión libre de bisulfitoPerfilado de metilación de ADNMetilación Enzimática-seqPreparación de librerías de baja entradaAnálisis de metilación resuelto espacialmente

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Área de la Ciencia:

  • Epigenética
  • Biología Molecular
  • Genómica

Sus antecedentes:

  • La heterogeneidad tisular confunde el análisis de la metilación del ADN.
  • La microdisección láser (LCM) aísla poblaciones celulares específicas pero produce ADN de baja cantidad.
  • La secuenciación convencional por bisulfito requiere una alta entrada de ADN y causa degradación.

Objetivo del estudio:

  • Desarrollar un método de perfilado de metilación de ADN de baja entrada para células aisladas por LCM.
  • Integrar LCM con una técnica de conversión enzimática libre de bisulfito.
  • Permitir el análisis epigenético robusto de poblaciones de células raras.

Principales métodos:

  • Integración de la microdisección láser (LCM) con la Metilación Enzimática-seq (EM-seq).
  • Optimización de protocolos de preparación de librerías de baja entrada para la conversión enzimática de ADN.
  • Perfilado de metilación libre de bisulfito para preservar la integridad del ADN y reducir el sesgo de GC.

Principales resultados:

  • Se logró un perfilado de metilación robusto y reproducible a partir de tan solo 100 células.
  • Se obtuvo una calidad de datos comparable a la de las muestras de tejido a granel.
  • Se demostró la utilidad para aislar células tumorales para el descubrimiento de biomarcadores.

Conclusiones:

  • LCM-EM-seq es un marco escalable para el análisis epigenético resuelto espacialmente.
  • Permite estudios de poblaciones de células raras conscientes de la metilación.
  • Avanza el descubrimiento de biomarcadores, las terapias dirigidas y el perfilado epigenético personalizado.