相关实验视频
Updated: Jul 23, 2025

16:24
Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
Published on: February 21, 2014
20.3K
TRPS1调节染色体的可访问性,以调节雌激素受体 (ER) 结合和ER目标基因表达在光线乳腺癌细胞
Thomas G Scott1, Kizhakke Mattada Sathyan2,3, Daniel Gioeli4
1Department of Biochemistry and Molecular Genetics, University of Virginia, Charlottesville, Virginia, United States of America.
bioRxiv : the preprint server for biology
|July 18, 2023
概括
这项研究显示,TRPS1,一种在乳腺瘤中过度表达的蛋白质,调节数百个基因,包括那些参与雌激素信号传递的基因. 削弱TRPS1会影响细胞周期和预后,这表明它是乳腺癌的潜在治疗点.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 乳腺癌,特别是光线亚型,通常是由雌激素受体α (ER) 驱动的.
- 针对ER途径的疗法是有效的,但面临阻力,需要确定新的治疗点.
- TRPS1,一种抑制转录因子 (TF),在乳腺瘤中过度表达,与乳腺癌风险和细胞系敏感性有关.
研究的目的:
- 确定TRPS1的直接标,并阐明其在光线乳腺癌中调节基因的机制.
- 了解TRPS1如何影响ER活性和染色质结构.
- 评估TRPS1活性对乳腺癌患者预后的临床相关性.
主要方法:
- 一个可诱导的降解标签被引入到光线乳腺癌细胞系的原生TRPS1位点.
- 在诱导后30分钟内,从染色质中达到TRPS1的枯竭.
- 在TRPS1枯竭后,分析了基因表达和ER再分配.
主要成果:
- 发现TRPS1调节数百个基因的转录,包括雌激素信号通路中的基因.
- TRPS1直接影响染色质结构,导致ER重分布和ER基因的改变表达.
- TRPS1 枯竭抑制了细胞循环基因,降低了细胞翻倍率,高TRPS1 活性与患者预后更差相关.
结论:
- 在乳腺癌中,TRPS1在调节基因表达,染色质结构和ER活性方面发挥着重要作用.
- TRPS1直接影响乳腺癌细胞的健康状况,并与较差的患者结果有关.
- TRPS1代表了改善乳腺癌治疗策略的潜在治疗标.
相关概念视频
Transducer Mechanism: Nuclear Receptors
1.4K
Nuclear receptors, or NRs, are unique transcription factors that regulate gene transcription and affect the cellular pathways involved in reproduction, development, or metabolism. Their ability to be stimulated by small lipophilic ligands and control vital cellular processes makes them ideal drug targets. Nearly 10-15% of currently prescribed drugs target these receptors.
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
About 48 different soluble family members of nuclear receptors are identified that can be divided into two main classes:
1.4K
Repressible Operon: trp Operon
52
The trp operon in Escherichia coli exemplifies a repressible operon. It regulates the synthesis of tryptophan through repressor-mediated transcriptional control and attenuation. This dual regulatory mechanism ensures tryptophan biosynthesis occurs only when needed, conserving cellular resources.Structure of the trp OperonThe trp operon consists of five structural genes (trpE, trpD, trpC, trpB, and trpA) that encode enzymes for tryptophan biosynthesis. These genes are transcribed as a single...
52
Non-LTR Retrotransposons
11.6K
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...
11.6K
Regulation of Nuclear Protein Sorting
2.4K
Nuclear protein sorting regulates nucleus composition and gene expression, crucial for determining the fate of a eukaryotic cell. Hence, the entry and exit of molecules across the nuclear envelope is a tightly controlled process. Nuclear protein sorting can be inhibited by one of the following ways: 1) masking cargo signal sequences, 2) modifying the nuclear receptor's affinity for cargo, 3) controlling the nuclear pore size, 4) retaining the cargo during its transit to the cytosol or the...
2.4K
Regulation of the Unfolded Protein Response
2.5K
Inositol-requiring kinase one or IRE1 is the most conserved eukaryotic unfolded protein response (UPR) receptor. It is a type I transmembrane protein kinase receptor with a distinctive site-specific RNase activity. As the binding mechanics of the misfolded proteins with the N-terminal domain of IRE-1 are unclear, three binding models — direct, indirect, and allosteric -- are proposed for receptor activation. Nevertheless, it is known that once a misfolded protein associates with IRE1, it...
2.5K
LTR Retrotransposons
17.6K
LTR retrotransposons are class I transposable elements with long terminal repeats flanking an internal coding region. These elements are less abundant in mammals compared to other class I transposable elements. About 8 percent of human genomic DNA comprises LTR retrotransposons. Some of the common examples of LTR retrotransposons are Ty elements in yeast and Copia elements in Drosophila.
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
The internal coding region of LTR retrotransposons and their mechanism of transposition closely resembles a...
17.6K

