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Formación de ARN circulares

Arvind Srinivasan1, Marzena Wojciechowska2

  • 1Department of Rare Diseases, Polish Academy of Sciences, Institute of Bioorganic Chemistry, Poznan, Poland.

Advances in experimental medicine and biology
|August 31, 2025
PubMed
Resumen
Este resumen es generado por máquina.

Los ARN circulares (circRNAs) son moléculas de ARN únicas formadas por el backsplicing. Su biogénesis involucra elementos de acción cis y proteínas de unión al ARN, que influyen en las funciones celulares.

Palabras clave:
Acoplamiento traseroEl ARN circularElementos de la reglamentación cisEl empalme de ARNFactores de acción trans

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Área de la Ciencia:

  • Biología molecular
  • La genética
  • Biología del ARN

Sus antecedentes:

  • Los ARN circulares (circRNAs) son moléculas de ARN no lineales formadas a través del backsplicing.
  • Se diferencian de los ARN lineales debido a su estructura de bucle cerrado.
  • Los circRNA se generan a través de varios mecanismos, incluido el backsplicing directo, el salto de exones y el salto de lariat.

Objetivo del estudio:

  • Revisar las variables que influyen en la biogénesis del circRNA.
  • Para resaltar los orígenes de diferentes tipos de circRNA en humanos.
  • Para aclarar los mecanismos reguladores que rigen la síntesis de circRNA.

Principales métodos:

  • Revisión de la literatura existente sobre la biogénesis del circRNA.
  • Análisis de los elementos de acción cis y los factores de acción trans implicados en la formación de circRNA.
  • Examen de las funciones de las combinaciones complementarias inversas (RCM) y las proteínas de unión al ARN (RBPs).

Principales resultados:

  • La biogénesis del circRNA está regulada por una compleja interacción de elementos cis-activos y factores trans-activos.
  • Las combinaciones complementarias inversas (RCM) facilitan la alineación del sitio de empalme para el empalme posterior.
  • Las proteínas de unión al ARN (RBPs) pueden modular la síntesis de circRNA al afectar la eficiencia del backsplicing.
  • Existen tres tipos principales de circRNAs: exónicos (EcircRNAs), intrónicos (IcircRNAs) y circRNAs exónico-intrónicos (EIcircRNAs).

Conclusiones:

  • La síntesis de circRNA es un proceso estrictamente regulado crucial para las actividades celulares.
  • Comprender la biogénesis del circRNA es clave para comprender sus diversas funciones.
  • La interacción de elementos genéticos y factores de proteínas da forma al paisaje de la producción de circRNA.