Video Experimental Relacionado
Updated: Jun 21, 2026
12:13
Sequencing Small Non-coding RNA from Formalin-fixed Tissues and Serum-derived Exosomes from Castration-resistant Prostate Cancer Patients
Published on: November 19, 2019
El receptor de andrógenos regula un programa de transcripción distinto en el cáncer de próstata independiente de
Qianben Wang1, Wei Li, Yong Zhang
1Department of Medical Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02115, USA.
Cell
|July 28, 2009
Resumen
El receptor de andrógenos (AR) impulsa el crecimiento del cáncer de próstata incluso sin andrógenos. En cánceres avanzados, la AR activa genes específicos del ciclo celular, promoviendo la progresión tumoral y el crecimiento independiente.
Área de la Ciencia:
- Oncología Oncología.
- Biología Molecular Biología Molecular
- La epigenética es la epigenética.
Sus antecedentes:
- La progresión del cáncer de próstata implica un cambio de estados dependientes de andrógenos a estados independientes de andrógenos.
- El receptor de andrógenos (AR) juega un papel crítico en ambas etapas, pero su función en cánceres avanzados e independientes no se comprende completamente.
Objetivo del estudio:
- Para definir los genes diana dependientes directos de AR y aclarar la función de AR en las células de cáncer de próstata independientes de andrógenos.
- Investigar los mecanismos de la regulación génica mediada por AR en el cáncer de próstata avanzado.
Principales métodos:
- Generación de perfiles de expresión génica dependientes de AR en células cancerosas dependientes de andrógenos e independientes.
- Análisis del cistroma de AR para mapear los sitios de unión de AR en todo el genoma.
- Análisis de las marcas epigenéticas (metilación de la histona H3K4) y la unión del factor de transcripción (FoxA1) en los potenciadores de genes diana.
Principales resultados:
- La AR regula selectivamente hacia arriba los genes del ciclo celular de fase M, incluido UBE2C, en células independientes de andrógenos, a diferencia de las células dependientes de andrógenos.
- Las modificaciones epigenéticas en el potenciador de UBE2C, como la metilación de H3K4 y la unión a FoxA1, facilitan la unión a AR y la activación de UBE2C en células independientes de andrógenos.
- La AR ejecuta un programa de expresión génica distinto en el cáncer de próstata independiente de andrógenos, impulsando la proliferación.
Conclusiones:
- El receptor de andrógenos (AR) juega un papel crucial y distinto en el crecimiento del cáncer de próstata independiente de andrógenos.
- La regulación epigenética en potenciadores específicos dicta la función de AR en el cáncer de próstata avanzado.
- Dirigirse a este programa AR distinto puede ofrecer nuevas estrategias terapéuticas para el cáncer de próstata letal.
Videos de Conceptos Relacionados
02:36RNA Polymerase II Accessory Proteins
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
02:04Co-activators and Co-repressors
Gene transcription is regulated by the synergistic action of several proteins that form a complex at a gene regulatory site. This is observed in eukaryotes, where the regulation of gene expression is a complex process. Regulatory proteins in eukaryotes can broadly be classified into two types – regulators that bind directly to specific DNA sequences and co-regulators that associate with regulatory proteins but cannot directly bind to the DNA. These co-regulators are further divided into...
03:03mTOR Signaling and Cancer Progression
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
03:03mTOR Signaling and Cancer Progression
The mammalian target of rapamycin or mTOR protein was discovered in 1994 due to its direct interaction with rapamycin. The protein gets its name from a yeast homolog called TOR. The mTOR protein complex in mammalian cells plays a major role in balancing anabolic processes such as the synthesis of proteins, lipids, and nucleotides and catabolic processes, such as autophagy in response to environmental cues, such as availability of nutrients and growth factors.
The mTOR pathway or the...
The mTOR pathway or the...
02:23Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
02:23Abnormal Proliferation
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 daughter...