对单细胞胚胎数据的综合分析揭示了人类植入前细胞内细胞质的转录组签名
Xinshu Wei1, Xiang Fang2, Xiu Yu3
1School of Medicine, South China University of Technology, Guangzhou, China; Laboratory of Medical Systems Biology, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangdong Provincial Clinical Research Center for Child Health, Guangzhou, 510623, China.
Developmental biology
|July 12, 2023
概括
这项研究阐明了内部细胞质 (ICM) 在人类胚胎干细胞 (ESC) 发育中的作用. 研究人员确定了精确的时间点和关键基因,这些基因与早期人类血统规范有关.
科学领域:
- 发展生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 基因组学就是基因组学.
背景情况:
- 内细胞质 (ICM) 是胚胎干细胞 (ESC) 的来源,可以形成所有的胚胎组织.
- 在早期人类血统规范中ICM的确切作用及其分子机制仍然不完全理解.
研究的目的:
- 调查ICM在早期人类血统规范中的作用.
- 阐明ICM命运决定背后的分子机制.
- 为了验证人类植入前胚胎中血统承诺的两步假设.
主要方法:
- 公共人类植入前胚胎单细胞转录数据的综合分析.
- 运用轨迹推断算法来评估细胞可塑性.
- 基因表达动态和监管网络分析.
- 使用免疫光学验证新的ICM标记基因.
主要成果:
- 显然,ICM人口受到歧视,验证了两步的血统承诺模型.
- 根据分支概率确定了两个血统分离的精确时间点.
- 关键的转录因子 (GSC,PRDM1,SPIC) 被确定为ICM命运的潜在调节者.
- 新的人类ICM标记基因EPHA4和CCR8被发现并得到验证.
结论:
- 这项研究提供了对人类ICM细胞和早期人类发育的更深入的理解.
- 这些发现支持了两步的血统承诺假设,并确定了关键的监管因素.
- 发现的标记基因可能有助于进一步研究ESC和早期人类发育.
相关概念视频
01:10Zygotic Development And Stem Cell Formation
5.3K
The development of all multicellular organisms starts with the fusion of haploid cells called sperm and egg to form a diploid zygote. A zygote is a totipotent cell that can develop into a complete organism. The zygote undergoes cell division or cleavage to form an 8-cell mass. Until this stage, the cells are spherical, loosely attached, and remain totipotent. Totipotent cells are capable of developing both the embryonic and the extraembryonic tissues. However, as they continue to divide, they...
5.3K
01:33Cleavage and Blastulation
45.4K
After a large-single-celled zygote is produced via fertilization, the process of cleavage occurs while zygotes travel through the uterine tube. Cleavage is a mitotic cell division that does not result in growth. With each round of successive cell division, daughter cells get increasingly smaller.
45.4K
00:57Embryonic Stem Cells
3.6K
Embryonic stem (ES) cells were first discovered in mice in 1981 by Martin Evans. In 1998, James Thomson identified a method to isolate embryonic stem cells from humans. Human embryonic stem cells (hESCs) are obtained from 3-5 day old embryos that remain unused after an in vitro fertilization procedure.
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...
ES cells are grown in a culture medium where they can divide indefinitely, creating ES cell lines. Under certain conditions, ES cells can differentiate, either spontaneously into a variety of...
3.6K