建立和优化两步诱导系统,从胚胎干细胞生成原始生殖细胞样细胞
Zeyu Li1,2,3, XianShuai Xu1,2,3, GuangZheng Liu1,2,3
1Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, China.
FEBS open bio
|September 10, 2025
概括
这项研究优化了两步方案,在体外从胚胎干细胞 (ESC) 生成许多原始生殖细胞样细胞 (PGCLC). 这些PGCLCs成功地迁移到小胚胎中的生殖腺,帮助保护工作.
科学领域:
- 生殖生物学 生殖生物学
- 发展生物学 发展生物学
- 细胞分化 细胞分化
背景情况:
- 原始生殖细胞 (PGC) 对于繁殖至关重要,作为精子和卵子的前体.
- 肉PGC具有通过异种移植传播生殖系传播的潜力,但体外生产具有挑战性.
- 有效的PGCs体外生成对于保护危鸟类物种和遗传资源的保护至关重要.
研究的目的:
- 优化一种两步方案,用于胚胎干细胞 (ESC) 在体外分化为原始生殖细胞类细胞 (PGCLC).
- 验证诱导ESCs的多能性和成功分化为PGCLCs.
- 评估胚胎中诱导的PGCLCs的迁移和殖民能力.
主要方法:
- 使用2i因子优化ESC培养条件,以获得多能ESC克隆.
- 从使用bFGF,Activin和KSR的ESC中诱导出类似表皮质细胞 (EpiLC),通过qRT-PCR (Pax6,Eomes,Vimentin) 确认.
- 评估的生长因子组合 (BMP4,BMP8b,EGF,LIF,SCF) 对于EpiLCs与PGCLCs的分化,通过流细胞计,qRT-PCR和免疫光 (Cvh,C-kit,Dazl) 确认.
主要成果:
- 成功生成并验证了多能性肉ESC克隆.
- 实现了EpiLCs的高效诱导,并随后分化为PGCLCs,标志着生殖细胞标记物的高表达 (Cvh,C-kit,Dazl).
- 已证明诱导的PGCLCs成功迁移和殖民到受体胚胎的生殖腺中.
结论:
- 建立了一个强大的两步协议,用于从ESCs进行体外PGCLC生成.
- 优化的协议为产生PGCLC提供了一个可扩展的方法,解决了鸟类生殖系研究的局限性.
- 这一进步为鸟类遗传资源保护和保护策略提供了有价值的工具.
相关概念视频
01:49Meiosis I
Meiosis is a carefully orchestrated set of cell divisions, the goal of which—in humans—is to produce haploid sperm or eggs, each containing half the number of chromosomes present in somatic cells elsewhere in the body. Meiosis I is the first such division, and involves several key steps, among them: condensation of replicated chromosomes in diploid cells; the pairing of homologous chromosomes and their exchange of information; and finally, the separation of homologous chromosomes by a...
01:57Meiosis II
Meiosis II is the second and final stage of meiosis. It relies on the haploid cells produced during meiosis I, each of which contain only 23 chromosomes—one from each homologous initial pair. Importantly, each chromosome in these cells is composed of two joined copies, and when these cells enter meiosis II, the goal is to separate such sister chromatids using the same microtubule-based network employed in other division processes. The result of meiosis II is two haploid cells, each containing...
01:38Fertilization
During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...
01:33Cleavage and Blastulation
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.
01:10Zygotic Development And Stem Cell Formation
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...