相关实验视频

Updated: Sep 14, 2025

Isolating, Sequencing and Analyzing Extracellular MicroRNAs from Human Mesenchymal Stem Cells

Isolating, Sequencing and Analyzing Extracellular MicroRNAs from Human Mesenchymal Stem Cells

Published on: March 8, 2019

外染色体圆形DNA在人类骨髓中介细胞干细胞的分化中

Yuxi Gu¹, Yidan Song¹, Shuhua Wang¹

¹State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, Department of Orthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, People's Republic of China.

Stem cell research & therapy

|July 18, 2025

概括

外染色体圆形DNA (eccDNA) 调节人类骨髓中酶干细胞 (BMSC) 的分化. 这些eccDNAs作为转录模板和增强剂,影响正常细胞中的细胞命运.

科学领域:

细胞生物学细胞生物学
遗传学遗传学是一个
干细胞研究干细胞研究

背景情况:

外染色体圆形DNA (eccDNA) 参与癌症,但其在正常细胞中的功能尚不清楚.
人类骨髓介质干细胞 (BMSCs) 对于组织修复和再生至关重要.
了解eccDNA在BMSC分化中的作用对于再生医学至关重要.

研究的目的:

研究eccDNA在人类BMSCs分化中的作用.
为了识别特定的eccDNA及其编码基因参与BMSC分化.
探索eccDNA调节BMSC分化的机制.

主要方法:

循环DNA测序 (Circle-seq) 用于识别BMSC中的eccDNA及其差异化后代.
将ATAC-seq和RNA-seq数据与Circle-seq集成,以分析染色质可访问性和基因表达.
在体外实验中评估特定eccDNA和基因 (如PI4KA) 在BMSC分化中的功能作用.

主要成果:

在人类BMSC中,EccDNA很普遍,其编码的基因在分化时表达更高.
EccDNA增强了染色质的可访问性,促进了像RUNX2这样的关键基因的转录,这对于骨质生成至关重要.
编码在eccDNA中的PI4KA基因通过PI3K/AKT/mTOR途径促进骨质分化.
埃克克DNA作为剂量依赖的增强剂,调节BMSC分化.

结论:

在正常的人类BMSC分化中,EccDNA起着重要的调节作用.
在非癌细胞中,eccDNA既是转录模板,也是功能增强剂.
这些发现为未来的研究和再生医学潜在的临床应用开辟了道路.

更多相关视频

Chondrogenic Differentiation Induction of Adipose-derived Stem Cells by Centrifugal Gravity

Chondrogenic Differentiation Induction of Adipose-derived Stem Cells by Centrifugal Gravity

Published on: February 24, 2017

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells

Directed Differentiation of Primitive and Definitive Hematopoietic Progenitors from Human Pluripotent Stem Cells

Published on: November 1, 2017

相关概念视频

Mesenchymal Stem Cells

Mesenchymal Stem Cells

Mesenchymal stem cells (MSCs) are adult stem cells that can differentiate into most connective tissue cell types, except for hematopoietic cells, depending upon the source of MSCs. For example, bone-marrow-derived MSCs (BM-MSCs) can differentiate into osteocytes, hepatocytes, and pancreatic and neuronal cells. MSCs can be isolated from various sources such as bone marrow, placenta, adipose tissue, teeth, and Wharton’s jelly, a gelatinous substance in the umbilical cord. The ease of their...