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Videos de Conceptos Relacionados

RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
RNA Interference01:23

RNA Interference

RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
Experimental RNAi02:15

Experimental RNAi

RNA interference (RNAi) is a cellular mechanism that inhibits gene expression by suppressing its transcription or activating the RNA degradation process. The mechanism was discovered by Andrew Fire and Craig Mello in 1998 in plants. Today, it is observed in almost all eukaryotes, including protozoa, flies, nematodes, insects, parasites, and mammals. This precise cellular mechanism of gene silencing has been developed into a technique that provides an efficient way to identify and determine the...
siRNA - Small Interfering RNAs02:30

siRNA - Small Interfering RNAs

Small interfering RNAs, or siRNAs, are short regulatory RNA molecules that can silence genes post-transcriptionally, as well as the transcriptional level in some cases. siRNAs are important for protecting cells against viral infections and silencing transposable genetic elements.
In the cytoplasm, siRNA is processed from a double-stranded RNA, which comes from either endogenous DNA transcription or exogenous sources like a virus. This double-stranded RNA is then cleaved by the ATP-dependent...
Types of RNA01:20

Types of RNA

Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in regulating gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA Performs Diverse...
Types of RNA01:23

Types of RNA

Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...

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Updated: Jun 4, 2026

DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation
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DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation

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Interferencia de ARN inducible por combinación provocada por oligonucleótidos químicamente modificados.

Deepak Kumar1, Sang Hoon Kim, Yohei Yokobayashi

  • 1Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, USA.

Journal of the American Chemical Society
|February 8, 2011
PubMed
Resumen

Este estudio introduce una nueva plataforma de interferencia de ARN inducible químicamente (RNAi) para el silenciamiento preciso de genes. Este sistema permite el control combinatorio de múltiples genes, acelerando la investigación en función génica y el descubrimiento de fármacos.

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Área de la Ciencia:

  • Biología Molecular Biología Molecular
  • Reglamento genético Reglamento genético.
  • Biotecnología La biotecnología es la biotecnología.

Sus antecedentes:

  • La interferencia de ARN inducible químicamente (RNAi) ofrece un control preciso de la expresión génica para diversas aplicaciones.
  • Los métodos de RNAi existentes pueden carecer del control combinatorio necesario para estudios complejos de interacción génica.

Objetivo del estudio:

  • Desarrollar una nueva plataforma de RNAi inducible para el silenciamiento genético combinatorio.
  • Para permitir el control temporal y espacial de la expresión génica utilizando inductores químicos.

Principales métodos:

  • Diseñó una arquitectura modular de ARN con un bucle troncal del sensor de oligonucleótido y un dominio de efector de RNAi.
  • Utilizó oligonucleótidos ortogonales modificados químicamente como inductores para desencadenar cambios estructurales en el ARN.
  • Maquinaria de RNAi apalancada para el silenciamiento de genes en el cambio estructural.

Principales resultados:

  • Se ha demostrado con éxito una nueva plataforma de RNAi inducible.
  • Mostró la capacidad de desencadenar el silenciamiento de genes a través de cambios estructurales inducidos químicamente en el ARN.
  • Estableció un sistema para la regulación combinatoria de dos genes.

Conclusiones:

  • La plataforma desarrollada proporciona una poderosa herramienta para estudiar complejas interacciones genéticas.
  • Este enfoque acelera el cribado de posibles objetivos de drogas.
  • Ofrece aplicaciones potenciales en la terapia génica y la investigación de genómica funcional.