相关实验视频

Updated: Jan 13, 2026

Methyl-binding DNA capture Sequencing for Patient Tissues

Methyl-binding DNA capture Sequencing for Patient Tissues

Published on: October 31, 2016

结合PCBP1与单链多细胞因子的PCBP1增强了cGAS感应,并阻碍了乳腺癌的发展

Cécile Fréreux¹, Joseph A Q Karam¹, Breege V Howley¹

¹Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, SC, USA.

Communications biology

|January 7, 2026

概括

多C结合蛋白1 (PCBP1) 通过增强cGAS-STING通路,在乳腺癌中起到瘤抑制作用. 这增强了抗瘤免疫力,改善了患者的生存率.

科学领域:

免疫学免疫学免疫学
癌症生物学癌症生物学
分子生物学分子生物学

背景情况:

循环GMP-AMP合成酶 (cGAS) 刺激干扰素基因 (STING) 途径对于检测细胞核酸和启动抗瘤免疫反应至关重要.
这种途径的失调与包括乳腺癌在内的各种癌症有关,这突显了其治疗潜力.

研究的目的:

调查聚基结合蛋白1 (PCBP1) 在乳腺癌进展中的作用及其对cGAS-STING通路的影响.
阐明 PCBP1 影响核酸感应和免疫激活的分子机制.

主要方法:

对患者数据集的分析,以将PCBP1表达与临床结果相关联.
使用转基因小鼠模型,在乳腺上皮细胞中具有条件的PCBP1淘汰.
生物化学试验评估PCBP1与核酸的相互作用及其对cGAS活性的影响.

主要成果:

PCBP1表达与瘤负担相反相关,并与改善患者存活率有关.
PCBP1淘汰导致I型干扰素的产生减少,干扰素刺激基因的表达减少,细胞毒性T细胞透减少.
PCBP1与富含细胞因子的单链基因结合,增强cGAS与核酸的结合,并增强cGAS-STING通路的激活.

结论:

PCBP1通过放大cGAS-STING信号来作为乳腺癌中的瘤抑制剂.
PCBP1作为核酸共传感器,增强了cGAS介导的免疫监测的特异性和有效性.
准PCBP1或增强其功能可能代表乳腺癌的新疗法策略.

更多相关视频

Silencing of BRCA2 to Identify Novel BRCA2-regulated Biological Functions in Cultured Human Cells

Silencing of BRCA2 to Identify Novel BRCA2-regulated Biological Functions in Cultured Human Cells

Published on: August 12, 2015

Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC Crosslinking of Small Molecules to Isolate Chromatin

Genome-wide Mapping of Drug-DNA Interactions in Cells with COSMIC Crosslinking of Small Molecules to Isolate Chromatin

Published on: January 20, 2016

相关概念视频

GPCRs Regulate Adenylyl Cylase Activity

GPCRs Regulate Adenylyl Cylase Activity

Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...

Inhibition of Cdk Activity

Inhibition of Cdk Activity

The orderly progression of the cell cycle depends on the activation of Cdk protein by binding to its cyclin partner. However, the cell cycle must be restricted when undergoing abnormal changes. Most cancers correlate to the deregulated cell cycle, and since Cdks are a central component of the cell cycle, Cdk inhibitors are extensively studied to develop anticancer agents. For instance, cyclin D associates with several Cdks, such as Cdk 4/6, to form an active complex. The cyclin D-Cdk4/6 complex...

Abnormal Proliferation

Abnormal 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...

Epigenetic Regulation

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

Epigenetic Regulation

Epigenetic Regulation

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...

Cooperative Binding of Transcription Regulators

Cooperative Binding of Transcription Regulators

Transcriptional regulators bind to specific cis-regulatory sequences in the DNA to regulate gene transcription. These cis-regulatory sequences are very short, usually less than ten nucleotide pairs in length. The short length means that there is a high probability of the exact same sequence randomly occurring throughout the genome. Since regulators can also bind to groups of similar sequences, this further increases the chances of random binding. Transcriptional regulators form...