通过促进通过差异化和CYLD的生存,MyoD在狂宫肌肉瘤中至关重要
Alexander R Oles1, Peter Y Yu2, Abasi-Ama Udeme1
1Department of Pediatrics, Darby Children's Research Institute, Medical University of South Carolina, Charleston, SC 29425, USA.
iScience
|August 13, 2025
概括
令人惊的是,拉布多米索尔科马瘤细胞通过由MyoD控制的部分分化而生存,而不是NF-κB. 丢失MyoD使这些癌细胞敏感到死亡,这表明MyoD在这种儿科癌症中充当瘤基因.
科学领域:
- 儿科瘤学 儿科瘤学
- 癌细胞生物学 癌细胞生物学
- 癌症的分子机制 癌症的分子机制
背景情况:
- 狂肌肉瘤 (RMS) 是一种常见的儿科软组织癌症,起源于不完全分化的骨肌细胞.
- 核因子-kappa B (NF-κB) 通常对癌细胞存活至关重要,但其在RMS中的作用不明.
研究的目的:
- 为了研究Rhabdomyosarcoma细胞的生存机制.
- 探索肌源性转录因子MyoD在RMS生存和分化中的作用.
- 了解RMS中MyoD,DNA甲基化和细胞死亡途径之间的关系.
主要方法:
- 在RMS细胞中分析NF-κB活性.
- 研究MyoD表达和损失对RMS细胞存活和分化的影响.
- 通过MyoD.检查DNA甲基转移酶和CYLD基因的调节.
主要成果:
- 与其他癌症相比,RMS细胞对NF-κB的生存依赖性减少.
- 由MyoD驱动的部分分化对于RMS细胞生存至关重要.
- MyoD的损失导致脱差和对压力诱导的细胞死亡的敏感性增加.
- MyoD调节DNA甲基转移酶以抑制瘤抑制基因CYLD,促进细胞存活.
结论:
- 在Rhabdomyosarcoma中,MyoD通过部分分化和抑制细胞死亡来促进存活,在Rhabdomyosarcoma中发挥了矛盾的瘤作用.
- 针对MyoD或其下游途径可能代表RMS的新治疗策略.
相关概念视频
Satellite Stem Cells and Muscular Dystrophy
2.0K
Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
2.0K
Abnormal 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
Differentiation of Common Myeloid Progenitor Cells
3.3K
Common myeloid progenitors (CMPs) are oligopotent cells that can differentiate into granulocytes and macrophages. Granulocytes and macrophages are essential for protecting the body against bacterial, viral, or fungal infections. They migrate from the bone marrow into the circulating blood to reach specific tissue sites where they differentiate and help in immune surveillance. However, they survive only for a few days and must be continuously made available to the organism to maintain a robust...
3.3K
Master Transcription Regulators
7.0K
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...
7.0K
Formation of Muscle Fibers from Myoblasts
5.1K
De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
5.1K
mTOR Signaling and Cancer Progression
3.9K
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...
3.9K


