染色体特征,转录组和组织中的蛋白质的多重空间映射
Pengfei Guo1,2, Liran Mao1,3,4,2, Yufan Chen5
1Department of Pathology and Laboratory Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
空间-Mux-seq可以同时进行多omics分析,揭示复杂的细胞身份和组织中的调节网络. 这种先进的空间多学科方法增强了对超越单一模式研究的组织异质性的理解.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 系统生物学 系统生物学
背景情况:
- 细胞状态由分子层的层次结构 (基因组,表观基因组,转录组,蛋白质组,代谢组) 调节.
- 空间奥米克技术在组织环境中捕获分子数据,但仅限于1-2种模式,阻碍了全面的细胞身份理解.
- 现有的方法对复杂的生物系统和调节机制提供了不完整的观点.
研究的目的:
- 为了引入空间-Mux-seq,一个新的多模式空间技术.
- 为了在组织规模和细胞分辨率上同时对五种分子模式 (两个基因组修饰,开放色素,转录组,蛋白质) 进行分析.
- 推进对复杂生物系统中细胞身份和调节机制的理解.
主要方法:
- 空间-Mux-seq技术的开发和应用.
- 基因组范围内的基因组修饰,开放色素,整个转录组和蛋白质面板的同时空间分析.
- 在小鼠胚胎和大脑中生成多模式组织图.
主要成果:
- 空间-Mux-seq成功地以空间分辨的方式绘制了五种分子模式.
- 与单模数据相比,多模数据显著改善了细胞类型和状态歧视.
- 分析揭示了神经元分化过程中表观遗传修饰,基因表达和蛋白质水平之间的时空关系.
- 鉴定了带有空间变化的表观遗传梯度的放射性状腺空间,并揭示了海马中抑制性基因素标记的新角色.
结论:
- 空间-Mux-seq提供了一个全面的方法来表征组织和细胞异质性.
- 这项技术为组织组织,功能和基因调控网络之间的相互作用提供了前所未有的见解.
- 这些发现为研究复杂的生物系统和疾病机制开辟了新的途径.
相关概念视频
Organization of Genes
Overview
Position-effect Variegation
In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.
Euchromatin
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...
Chromatin Position Affects Gene Expression
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 timing and level of...
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the timing and level of...
Ribosome Profiling
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique helps...
Euchromatin
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...


