相关实验视频
Updated: Jan 24, 2026

08:42
A Novel Human Epithelial Enteroid Model of Necrotizing Enterocolitis
Published on: April 10, 2019
8.1K
分子和染色体可访问性计划是新生儿死性肠球炎的表皮损伤和受损再生的基础
Yi Xiong1, Andrea Zito2, Haoyan Liang3
1Department of General Surgery, Capital Institute of Pediatrics Affiliated Children's Hospital, Beijing,100020, China; Translational Medicine, The Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G0A4, Canada.
Cellular and molecular gastroenterology and hepatology
|January 22, 2026
概括
新生儿死性肠球炎 (NEC) 通过破坏干细胞功能,损害肠道修复. 这项研究确定Ezh2是肠干细胞 (ISC) 的关键调节者,并建议准Ezh2和WNT信号,以恢复NEC的肠道完整性.
科学领域:
- 胃肠病学 胃肠病学
- 发展生物学 发展生物学
- 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:
- 新生儿死性肠球炎 (NEC) 是一种危及生命的疾病,其特征是肠损伤和上皮维修受损.
- 了解NEC缺陷表皮再生背后的分子机制对于开发有效疗法至关重要.
研究的目的:
- 在新生儿NEC小鼠模型中使用综合多omics方法全面绘制表皮损伤的地图.
- 在NEC的背景下,确定肠干细胞 (ISC) 功能和上皮再生的关键调节者.
主要方法:
- 使用一种新生儿小鼠模型,通过配方养,缺氧和脂多糖化物诱导NEC.
- 应用了集成的多组学:散装RNA测序,单核RNA测序 (snRNA-seq),单核测定可转移酶可访问的染色体测序 (snATAC-seq) 和多重错误稳固光在位杂交 (MERFISH).
- 进行了体外和体内实验,以评估NEC表型,肠道形态和有机体形成.
主要成果:
- 在NEC中观察到表皮细胞组成,转录网络和染色质可访问性的显著变化.
- 确定了肠干细胞 (ISC) 和过渡放大细胞的减少,以及破坏的WNT信号传递和干细胞维护基因.
- 揭示了表观遗传调节器Ezh2对LGR5+ISC身份和稳态至关重要;它的敲击加剧了炎症并减少了干部.
结论:
- 这项研究提供了实验NEC上皮质损伤的多学科图谱,突出了ISC失败的新机制.
- Ezh2被确定为LGR5+ISC身份和再生的关键调节者.
- 针对Ezh2和WNT信号提供了一个有希望的治疗策略,以恢复NEC的上皮质完整性.
相关概念视频
Chromatin Packaging
21.8K
Each human somatic cell contains 6 billion base-pairs of DNA. Each base-pair is 0.34 nm long, which means that each diploid cell contains a staggering 2 meters of DNA. How is such a long DNA strand packed inside a nucleus measuring only 10 - 20 microns in diameter?
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
The chromatin
In combination with specialized DNA binding protein called Histones, the DNA double helix forms a compact DNA: protein complex called chromatin. The chromatin itself is further compacted into higher-order...
21.8K
Chromatin Packaging
19.0K
Each human somatic cell contains 6 billion base pairs of DNA. Each base pair is 0.34 nm long, meaning each diploid cell contains a staggering 2 meters of DNA. This long DNA strand is packed inside a nucleus measuring only 10-20 microns in diameter with the help of specialized DNA-binding proteins called histones. Together they form a compact DNA-protein complex called chromatin. The chromatin is further compacted into higher-order structures. The highest level of compaction is achieved during...
19.0K
Chromatin Packaging
9.6K
9.6K
Spreading of Chromatin Modifications
9.4K
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...
9.4K
Inheritance of Chromatin Structures
7.3K
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...
7.3K
Chromatin Position Affects Gene Expression
24.7K
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...
24.7K

