Video Experimental Relacionado
Updated: Sep 9, 2025

08:51
Genome-wide RNAi Screening to Identify Host Factors That Modulate Oncolytic Virus Therapy
Published on: April 3, 2018
9.2K
El virus oncogénico secuestra la función pionera de SOX18 para mejorar la persistencia viral
Krista Tuohinto1, Matthew S Graus2, Peyton Staab1
1Translational Cancer Medicine Research Program, University of Helsinki, Finland.
Research square
|September 2, 2025
Resumen
- ¿Qué es eso?
Área de la Ciencia:
- Virología
- Biología molecular
- En el campo de la oncología
Sus antecedentes:
- El herpesvirus del sarcoma de Kaposi (KSHV) establece infecciones de por vida, principalmente en las células endoteliales linfáticas (CEL).
- El mantenimiento del genoma episomal viral es crucial para la infección persistente por KSHV, que implica la replicación y el enlace del ADN del huésped.
- Los mecanismos reguladores específicos del mantenimiento del genoma viral de una manera específica para el tipo de célula no se comprenden completamente.
Objetivo del estudio:
- Investigar cómo el KSHV asegura la persistencia de su genoma episomal dentro de las células huésped.
- Identificar el papel de los factores específicos del tipo de célula en el mantenimiento del episoma de KSHV.
- Elucidar los mecanismos moleculares por los cuales KSHV interactúa con la maquinaria celular huésped.
Principales métodos:
- Investigó la interacción entre la proteína LANA del KSHV y los factores celulares del huésped.
- Disrupción genética y farmacológica de SOX18 y BRG1.
- Carga viral episómica evaluada y características de la infección por KSHV.
Principales resultados:
- El KSHV secuestra el factor de transcripción específico del endotelio SOX18 para la persistencia del episoma viral.
- LANA recluta el complejo de remodelación de cromatina SWI / SNF, específicamente BRG1, a través de SOX18.
- La alteración de SOX18 o BRG1 reduce significativamente la carga episómica viral y las características de la infección.
Conclusiones:
- KSHV explota la función pionera de SOX18 en las LEC para mantener su genoma episomal.
- El eje LANA-SOX18-BRG1 es crítico para la persistencia eficiente del genoma viral y la accesibilidad de la cromatina.
- Los virus pueden aprovechar los reguladores transcripcionales específicos del linaje para establecer la retención persistente del episoma nuclear.
Videos de Conceptos Relacionados
Mechanisms of Retrovirus-induced Cancers
5.3K
Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
5.3K
Rous Sarcoma Virus (RSV) and Cancer
5.4K
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
5.4K
Induced Pluripotent Stem Cells
4.4K
Stem cells are undifferentiated cells that divide and produce different cell types. Ordinarily, cells that have differentiated into a specific cell type are terminally differentiated; however, scientists have found a way to reprogram these mature cells so that they dedifferentiate and return to an unspecialized, proliferative state. These cells are pluripotent like embryonic stem cells—able to produce all cell types—and are called induced pluripotent stem cells (iPSCs).
Somatic...
Somatic...
4.4K
Retroviruses
12.7K
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...
12.7K
Eukaryotic Transcription Inhibitors
10.0K
Certain biochemical processes, such as embryonic development and cell growth regulation, depend on the repression of specific genes. DNA binding proteins known as eukaryotic transcription inhibitors regulate the repression of gene expression in eukaryotes. The presence of these inhibitors at the required location and time in the cell is triggered by the presence of hormones and additional signals from other cells.
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
Eukaryotic transcription inhibitors usually contain two distinct domains, a...
10.0K
Cancer-Critical Genes I: Proto-oncogenes
9.1K
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
9.1K

