在体外粘附时出现人体胃化的出现
Riccardo De Santis1, Eleni Rice1, Gist Croft2
1Laboratory of Stem Cell Biology and Molecular Embryology, The Rockefeller University, New York, NY, USA.
Stem cell reports
|December 15, 2023
概括
人类胃化,早期人类发育的过程,使用干细胞衍生芽细胞模型 (blastoids) 进行了研究. 这些模型成功地自我组织并经历了胃化,反映了人类胚胎的自然发育.
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
- 人类胚胎发生
背景情况:
- 由于对胎儿组织的访问有限以及伦理方面的担忧,人类胃口的理解很差.
- 在体外对自然胚胎囊的研究提供了对人类早期发育的洞察力,但缺乏胃发育形态.
- 来自干细胞的胚胎细胞模型 (blastoids) 允许在体外复制人类植入前后的发育.
研究的目的:
- 为了研究人类胃流动,使用体外人体布拉斯模型.
- 为了比较发育时间和blasstoids和自然人类胚胎中胃流的分子特征.
主要方法:
- 人类的布拉斯被培养并诱导用于体外附着.
- 单细胞RNA测序是在自我组织的黑色素体上进行的.
- 通过比较布拉斯体和自然人类胚胎中的分子标记物来分析发育时间.
主要成果:
- 人类布拉斯托因自组织成BRA+群体,并在体外附着时经过胃化.
- 布拉斯的单细胞RNA测序复制了人类胃肠的转录基因特征.
- 用分子指标标记的胃流发作发生在blastoid模型和自然人类胚胎中受精后大约12天.
- 无论是自然的人类胚胎还是布拉斯托伊德模型,都表明了原始的条纹和中皮衍生物的自我组织.
结论:
- 人类状体模型为研究人类胃流动提供了可行的体外系统.
- 布拉斯托伊德回顾了人类胃流的关键分子和时间事件,包括原始的条纹和中皮形成.
- 这些发现提升了我们对早期人类发展的理解,并为未来的研究提供了强大的工具.
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