Video Experimental Relacionado
Updated: Sep 10, 2025
10:26
In Vitro Differentiation Model of Human Normal Memory B Cells to Long-lived Plasma Cells
Published on: January 20, 2019
12.4K
Papel de la interacción ebv-circRPMS1-p53 en la proliferación y progresión clínica del carcinoma gástrico asociado al
Ling Yang1, Meini Li1, Guiming Xie1
1Department of Clinical Laboratory, Eighth Affiliated Hospital of Guangxi Medical University, Guigang City People's Hospital, Guigang, Guangxi, China.
Virus research
|August 22, 2025
Resumen
El carcinoma gástrico asociado al virus de Epstein-Barr (EBVaGC) involucra un nuevo ARN circular ebv-circRPMS1 que se une a p53, promoviendo el crecimiento tumoral. Esta interacción ebv-circRPMS1-p53 se correlaciona con una baja supervivencia del paciente en EBVaGC.
Área de la Ciencia:
- En el campo de la oncología
- Virología
- Biología molecular
Sus antecedentes:
- El carcinoma gástrico asociado al virus de Epstein-Barr (EBVaGC) es un subtipo distinto con características moleculares únicas.
- La infección latente por EBV y la desregulación del supresor tumoral caracterizan el EBVaGC.
- El papel de los ARN circulares del EBV (EBV-circRNAs) en la patogénesis del EBVaGC, particularmente su interacción con p53, no se comprende bien.
Objetivo del estudio:
- Investigar el papel de un nuevo ebv-circRNA, ebv-circRPMS1, en el EBVaGC.
- Para aclarar la interacción funcional entre ebv-circRPMS1 y la proteína p53.
- Determinar la importancia clínica del eje ebv-circRPMS1-p53 en pacientes con EBVaGC.
Principales métodos:
- Modulación de ebv-circRPMS1 utilizando siRNA en células EBV+, validado por RT-qPCR.
- Confirmación de la unión directa de ebv-circRPMS1-p53 mediante ensayos de RIP/coinmunoprecipitación.
- Evaluación de la proliferación celular mediante ensayos de EDU y de la tumorigenicidad in vivo en modelos de xenotransplante.
Principales resultados:
- ebv-circRPMS1 se une directamente y mejora la función de p53, lo que lleva a un aumento de la proliferación de células tumorales.
- Se observó colocalización citoplasmática de ebv-circRPMS1 y p53.
- La coexpresión de ebv-circRPMS1 y p53 en una cohorte clínica (n=70) se correlacionó significativamente con una baja supervivencia del paciente.
Conclusiones:
- Un nuevo mecanismo en el que el EBV utiliza el ebv-circRPMS1 para subvertir la función supresora del tumor p53 del huésped en el EBVaGC.
- El eje ebv-circRPMS1-p53 representa un objetivo terapéutico potencial para la oncología de precisión en EBVaGC.
Videos de Conceptos Relacionados
02:23Abnormal Proliferation
4.6K
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...
4.6K
01:22Role of Ephrin-Eph Signalling in Intestinal Stem Cell Renewal
2.3K
Erythropoietin-producing hepatocellular carcinoma receptor (Eph) and its ligand, Eph receptor-interacting protein (Ephrin) were first discovered in the human carcinoma cell line, hence the name. Ephrin-Eph interaction guides cells to reach their appropriate location in adult tissues. They also play an essential role in the immune system by helping in immune cell migration, adhesion, and activation. Based on their structure and function, Eph is divided into two classes — EphA and EphB.
2.3K
01:19Interactions Between Signaling Pathways
6.4K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.4K
01:23Negative Regulator Molecules
35.9K
Positive regulators allow a cell to advance through cell cycle checkpoints. Negative regulators have an equally important role as they terminate a cell’s progression through the cell cycle—or pause it—until the cell meets specific criteria.
35.9K
01:51Mechanisms 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
02:38Mitogens and the Cell Cycle
6.6K
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
6.6K