Video Experimental Relacionado
Updated: May 29, 2025

07:40
A Data Integration Workflow to Identify Drug Combinations Targeting Synthetic Lethal Interactions
Published on: May 27, 2021
4.1K
Letalidad sintética de los complejos de control de calidad de ARNm en el cáncer
Vivian Prindle1, Adam E Richardson1, Kimberly R Sher1
1AbbVie, North Chicago, IL, USA.
Nature
|February 5, 2025
Resumen
La letalidad sintética identifica nuevos objetivos de cáncer. Dirigirse a los complejos PELO-HBS1L y SKI inhibe el crecimiento tumoral explotando las vulnerabilidades de las células cancerosas.
Área de la Ciencia:
- En el campo de la oncología
- Biología molecular
- Genética del cáncer
Sus antecedentes:
- La letalidad sintética es una estrategia de precisión para el tratamiento del cáncer.
- Los inhibidores de PARP son un ejemplo exitoso de letalidad sintética.
- Varios nuevos objetivos están avanzando en ensayos clínicos.
Objetivo del estudio:
- Identificar nuevas interacciones letales sintéticas en el cáncer humano.
- Investigar la interacción del complejo PELO-HBS1L y SKI dentro de la vía de control de calidad del ARNm.
- Determinar el potencial terapéutico de dirigir esta interacción.
Principales métodos:
- Análisis de contextos genéticos distintos, incluidos los tumores con eliminación de 9p21.3 y de alta inestabilidad microsatélite (MSI-H).
- Caracterización de la interacción del complejo PELO-HBS1L y SKI.
- Evaluación de las alteraciones del ciclo celular y de la activación de la respuesta proteica desplegada.
Principales resultados:
- Se identificó una nueva interacción letal sintética entre los complejos PELO-HBS1L y SKI.
- La desestabilización del complejo SKI conduce a la dependencia del complejo de rescate ribosómico PELO-HBS1L en tipos específicos de tumores.
- Esta letalidad sintética activa la respuesta de la proteína desplegada a través de IRE1 e inhibe el crecimiento tumoral.
Conclusiones:
- PELO y HBS1L son nuevos objetivos terapéuticos potenciales en el cáncer.
- La desestabilización del complejo SKI sirve como biomarcador para esta letalidad sintética.
- Este enfoque se dirige a una población significativa de pacientes en diversos contextos genéticos.
Videos de Conceptos Relacionados
Nonsense-mediated mRNA Decay
10.4K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
10.4K
Nuclear Export of mRNA
7.5K
Before mRNAs are exported to the cytoplasm, it is crucial to check each mRNA for structural and functional integrity. Eukaryotic cells use several different mechanisms, collectively known as mRNA surveillance, to look for irregularities in mRNAs. Irregular or aberrant mRNA are rapidly degraded by various enzymes. If a defective mRNA escapes the surveillance, it would be translated into a protein which would either be non-functional or not function properly. One of the primary irregularities in...
7.5K
MicroRNAs
3.0K
MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...
3.0K
mRNA Stability and Gene Expression
5.5K
The structure and stability of mRNA molecules regulates gene expression, as mRNAs are a key step in the pathway from gene to protein. In eukaryotes, the half-life of mRNA varies from a few minutes up to several days. mRNA stability is essential in growth and development. The absence of the proteins regulating its stability, such as tristetraprolin in mice, can cause systemic issues, including bone marrow overgrowth, inflammation, and autoimmunity.
Cis-acting Elements involved in mRNA stability
Cis-acting Elements involved in mRNA stability
5.5K
Regulation of Expression at Multiple Steps
864
The gene expression in cells is regulated at different stages: (i) transcription, (ii) RNA processing, (iii) RNA localization, and (iv) translation. Transcriptional regulation is mediated by regulatory proteins such as transcription factors, activators, or repressors—these control gene expression by initiating or inhibiting the transcription of genes. Once a precursor or pre-mRNA is produced, it undergoes post-transcriptional modification, including 5' capping, splicing, and the...
864
RNA Splicing
55.9K
Splicing is the process by which eukaryotic RNA is edited before its translation into protein. The RNA strand transcribed from eukaryotic DNA is called the primary transcript. The primary transcripts that become mRNAs are called precursor messenger RNAs (pre-mRNAs). Eukaryotic pre-mRNA contains alternating sequences of exons and introns. Exons are nucleotide sequences that code for proteins, whereas introns are the non-coding regions. In RNA splicing, introns are removed and exons are bonded...
55.9K

