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相关概念视频

Epigenetic Regulation01:37

Epigenetic Regulation

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Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
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Master Transcription Regulators02:23

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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...
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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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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.
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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...
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Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
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揭示与乳腺癌发展相关的表观遗传调节元素

Marta Jardanowska-Kotuniak1,2, Michał Dramiński1, Michal Wlasnowolski3

  • 1Computational Biology Group, Institute of Computer Science of the Polish Academy of Sciences, 01-248 Warsaw, Poland.

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概括

这项研究确定了乳腺癌的关键表观遗传变化,揭示了新的生物标志物和一种新的计算方法. 这些发现为了解基因调节和减少进一步研究的数据复杂性提供了一个强大的框架.

关键词:
在MCFS-ID中使用MCSF-ID.蒙特卡洛特征选择 功能选择在 NKAPL 工作.这就是NRF1的NRF1.自然语言处理自然语言处理.乳腺癌 乳腺癌 乳腺癌染色体结构 染色体结构表观遗传调节 表观遗传调节转录因子的转录因子

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科学领域:

  • 基因组学就是基因组学.
  • 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
  • 生物信息学是一种生物信息学.

背景情况:

  • 乳腺癌影响全球数百万人,需要对其潜在机制进行先进的研究.
  • 识别可靠的生物标志物和理解基因表达调节对于有效的治疗策略至关重要.

研究的目的:

  • 发现影响乳腺癌基因表达的表观遗传机制.
  • 为了发现新的乳腺癌生物标志物.
  • 开发一种综合生物信息学方法,结合特征选择,自然语言处理和3D染色体分析.

主要方法:

  • 利用了来自800多个样本的癌症基因组图谱 (TCGA) 多组组数据 (mRNA,miRNA,DNA甲基化).
  • 应用蒙特卡罗特征选择和相互依赖性发现,将417,486个特征减少到2701个显著特征.
  • 综合自然语言处理和3D染色体结构分析.

主要成果:

  • 使用选定的特征,在癌症和对照样本之间实现了高分类准确性.
  • 在癌症样本中观察到普遍较低的差异表达基因 (DEG) 表达和差异甲基化位点 (DMS) β值的增加.
  • 确定了影响转录因子结合 (NRF1,MXI1) 和改变基因表达 (NKAPL,PITX1) 的特定DMS.
  • 3D染色体模型揭示了癌细胞中的松散包装.

结论:

  • 这项研究强调了乳腺癌中复杂的调节依赖关系.
  • 拟议的生物信息学方法有效地减少了数据的维度,并确定了关键特征.
  • 结果为已识别的生物标志物和监管途径的实验验证提供了基础.