相关实验视频
Updated: Jul 5, 2025

08:04
Pancreatic Tissue Dissection to Isolate Viable Single Cells
Published on: May 26, 2023
2.7K
在胰腺癌细胞系中改变的素乙化模式诱导亚型特定的转录和表型变化
Quan Zhou1, Svenja Pichlmeier1, Anna Maria Denz1
1Department of Medicine II, University Hospital, LMU Munich, D‑81377 Munich, Germany.
International journal of oncology
|January 19, 2024
概括
药物诱导的表观遗传重编程影响胰腺癌亚型. 基因组乙转移酶抑制剂在经典的PDAC细胞中促进了瘤状特征,而基因组脱乙酶抑制剂对亚型识别或凝素敏感性影响很小.
科学领域:
- 在瘤学瘤学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症生物学 癌症生物学
背景情况:
- 胰腺管道腺癌 (PDAC) 通常呈现于晚期,除了化疗之外的治疗选择有限.
- 转录基因研究已经确定了不同的古典和基底类PDAC亚型,受表观遗传修饰的影响.
研究的目的:
- 调查药物诱导的表观遗传重编程是否影响胰腺癌细胞亚型身份.
- 确定表观遗传重编程对不同PDAC亚型化学敏感性的影响.
主要方法:
- 使用了古典和基底类的PDAC细胞系 (PaTu-S,Capan-1,Capan-2,Colo357,PaTu-T,PANC-1,MIAPaCa-2).这些细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中,PDAC细胞系中.
- 在短时间和长时间内用酸转移酶 (HAT) 和酸脱酶 (HDAC) 抑制剂治疗细胞.
- 分析了基因表达,蛋白质水平,繁殖,殖民地形成,迁移和药物敏感性.
主要成果:
- 经典和基底类PDAC细胞通过H3K27ac.ac.表现出亚型基因的表观遗传调节.
- 经典的PDAC细胞显示较低的HDAC2表达和较高的H3K27ac水平与基底类细胞相比.
- 在经典细胞中,HAT抑制剂治疗诱导了促进瘤的表型 (上皮标记物损失,迁移增加),HDAC抑制剂的影响最小.
- 尽管对SLC29A1基因有调节,但表观遗传重编程并没有显著改变gemcitabine的反应.
结论:
- 通过HAT抑制剂进行表观遗传重编程可以改变PDAC细胞特征,使其转向更具侵略性的表型.
- HDAC 抑制剂对 PDAC 亚型重编程或显著的化学敏感性调节的能力有限.
- 针对表观遗传修饰可能为PDAC提供新的治疗策略,尽管对化学敏感性的影响需要进一步调查.
相关概念视频
Spreading of Chromatin Modifications
8.3K
The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
Writers
The writer...
8.3K
Histone Variants at the Centromere
4.3K
Histone variants are the histone proteins with structural and sequence variations. These variants may be regarded as “mutant” forms that replace their canonical histone counterparts in the nucleosomes. Specific post-translational modifications on the histone variants enable further chromatin complexity and regulate tissue-specific gene expression. The most common histone variants are from histone H2A, H2B, and linker histone H1 families. However, several variants of histone H3...
4.3K
Histone Modification
13.3K
The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
13.3K

