扩展in situ基因组测序将核异常与异常欧克罗马抑制热点联系起来
bioRxiv : the preprint server for biology
|October 10, 2024
概括
扩展在位基因组测序 (ExIGS) 将核蛋白异常与基因抑制联系起来. 这项新技术揭示了Hutchinson-Gilford前列腺综合征中的层层缺陷如何影响染色质组织和细胞身份.
科学领域:
- 细胞生物学 细胞生物学
- 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.
背景情况:
- 显微镜和基因组学对于理解细胞功能至关重要,但缺乏以亚核分辨率集成数据的方法.
- 目前的多重成像技术受到光学衍射的限制,阻碍了准确的DNA-蛋白相互作用测量.
研究的目的:
- 开发和应用一种新的技术,即 expansion in situ genome sequencing (ExIGS),用于在单细胞内同时进行基因组测序和超分辨率蛋白质定位.
- 为了研究核形态变化的影响空间染色体组织在Hutchinson-Gilford前列腺症综合征.
主要方法:
- 开发了在位基因组测序 (ExIGS) 的扩展,用于高分辨率的DNA测序和核蛋白定位.
- 将ExIGS应用于来自Hutchinson-Gilford进发性综合征患者的纤维细胞.
- 分析了空间染色体组织,并确定了DNA-蛋白相互作用的变化.
主要成果:
- 发现层异常与抑制的欧克罗马丁热点相关,可能导致细胞身份丧失.
- 证明了层层异常会增加组织和老细胞中压制性的核环境.
- 展示了ExIGS将核异常与基因调节变化联系起来的能力.
结论:
- ExIGS是一个强大的,可通用的平台,用于将核异常与基因调节联系起来.
- 层状缺陷在异常的染色质抑制和细胞身份侵蚀中起着重要作用.
- 这些发现为涉及核形态和基因表达的疾病机制提供了洞察力.
更多相关视频
10:41An Integrated Platform for Genome-wide Mapping of Chromatin States Using High-throughput ChIP-sequencing in Tumor Tissues
Published on: April 5, 2018
10.4K
06:24Multiplexed Analysis of Retinal Gene Expression and Chromatin Accessibility Using scRNA-Seq and scATAC-Seq
Published on: March 12, 2021
3.5K
相关概念视频
Chromatin Position Affects Gene Expression
23.3K
Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area.
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
23.3K
Nucleosome Remodeling
9.0K
Nucleosomes are the basic units of chromatin compaction. Each nucleosome consists of the DNA bound tightly around a histone core, which makes the DNA inaccessible to DNA binding proteins such as DNA polymerase and RNA polymerase. Hence, the fundamental problem is to ensure access to DNA when appropriate, despite the compact and protective chromatin structure.
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
Nucleosome remodeling complex
Eukaryotic cells have specialized enzymes called ATP-dependent nucleosome remodeling enzymes. These enzymes...
9.0K
Euchromatin
6.8K
The extent of chromatin compaction can be studied by staining chromatin using specific DNA binding dyes. Under the microscope, the dense-compacted regions take up more dye, appearing darker, while the less-compact areas take up less dye and appear lighter. Based on the compaction level, chromatins are classified into two primary forms – euchromatin and heterochromatin.
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
Euchromatin is the less dense region of the chromatin and stains lighter. Euchromatin contains histone H3 extensively...
6.8K
Inheritance of Chromatin Structures
6.2K
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...
6.2K
