Video Experimental Relacionado
Updated: Feb 14, 2026
07:48
Utilizing Functional Genomics Screening to Identify Potentially Novel Drug Targets in Cancer Cell Spheroid Cultures
Published on: December 26, 2016
11.9K
Heterogeneidad de los transcritos del elemento LINE-1 en cánceres de pulmón no microcítico impulsada por el contexto
Yingshan Wang1, Kenneth S Ramos1
1Center for Genomic and Precision Medicine, Texas A&M Institute of Biosciences and Technology, Houston, TX 77030, USA.
Cancers
|February 13, 2026
Resumen
Los retrotransposones del elemento largo intercalado 1 (LINE-1) se reactivan en el cáncer de pulmón, impulsando la inestabilidad genómica. Este estudio caracterizó la actividad de LINE-1 en líneas celulares de cáncer de pulmón no microcítico, revelando patrones conservados e interacciones oncogénicas potenciales.
Área de la Ciencia:
- Genómica
- Biología Molecular
- Investigación del Cáncer
Sus antecedentes:
- Los retrotransposones del elemento largo intercalado 1 (LINE-1) constituyen una porción significativa del genoma humano.
- Los elementos LINE-1 están silenciados epigenéticamente durante el desarrollo, pero se reactivan en el cáncer, lo que contribuye a la inestabilidad genómica y la evasión inmune.
Objetivo del estudio:
- Categorizar los transcritos de LINE-1 en líneas celulares de cáncer de pulmón no microcítico (CPNM).
- Investigar la relación entre la actividad de LINE-1, las características genómicas y las vías oncogénicas en el CPNM.
Principales métodos:
- Análisis de transcritos de LINE-1 (subfamilia, longitud, orientación, origen, distribución) en 121 líneas celulares de CPNM de la Enciclopedia de Líneas Celulares de Cáncer (CCLE).
- Mapeo de inserciones de LINE-1 de alta prevalencia a genes cercanos para identificar interacciones funcionales.
- Análisis integrador de la actividad de LINE-1 con datos genómicos y clínicos.
Principales resultados:
- La expresión de LINE-1 en el CPNM está dominada por subfamilias jóvenes (L1HS, L1PA2-L1PA5).
- Se observaron patrones cromosómicos conservados de actividad de LINE-1 en subtipos de CPNM, con enriquecimiento en el cromosoma 4 y el cromosoma X.
- El carcinoma de células escamosas de pulmón (CCEP) mostró la mayor expresión de L1HS; la raza y la edad tuvieron una influencia modesta.
- Se identificaron puntos calientes de inserción de LINE-1 recurrentes cerca de genes asociados con el cáncer (por ejemplo, RB1, FTO), lo que sugiere una remodelación cis-regulatoria de las vías oncogénicas.
Conclusiones:
- La heterogeneidad de los transcritos de LINE-1 en el CPNM está influenciada por la arquitectura genómica del huésped y los puntos calientes activos conservados.
- Estos hallazgos ofrecen nuevas perspectivas sobre la desregulación genética y epigenética mediada por LINE-1 en el desarrollo del cáncer.
Más Videos Relacionados
Videos de Conceptos Relacionados
01:49Conserved Binding Sites
5.2K
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally...
5.2K
02:02Genomics
40.9K
Genomics is the science of genomes: it is the study of all the genetic material of an organism. In humans, the genome consists of information carried in 23 pairs of chromosomes in the nucleus, as well as mitochondrial DNA. In genomics, both coding and non-coding DNA is sequenced and analyzed. Genomics allows a better understanding of all living things, their evolution, and their diversity. It has a myriad of uses: for example, to build phylogenetic trees, to improve productivity and...
40.9K
01:57What is Conservation Biology?
24.4K
Conservation biology is a scientific field that focuses on the preservation of biodiversity in order to protect ecosystems while meeting the needs of the human population. Humans require properly functioning ecosystems to maintain our supply of natural resources, including food, medicines, and building materials.
24.4K
02:26Conservation of Protein Domains Over Different Proteins
14.7K
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to...
14.7K
02:04Conservation of Small Populations
17.4K
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
17.4K
02:16Transcription Factors
82.9K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
82.9K