增长因子EPIREGULIN促进发育中的新皮层中基底前代细胞的增殖
Paula Cubillos1, Nora Ditzer1, Annika Kolodziejczyk1
1Center for Regenerative Therapies TU Dresden, TUD Dresden University of Technology, 01307, Dresden, Germany.
The EMBO journal
|March 22, 2024
概括
埃皮瑞古林 (EREG) 通过促进基底原生细胞增殖,驱动新皮层扩张. 灵长类动物的特定物种的EREG调节可能解释了大脑的大小.
科学领域:
- 进化生物学是进化的生物学.
- 发育神经科学的发展神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 新皮层在进化中的扩张与增加的神经元数量相关.
- 这种增加与基底原生细胞增强的增殖和神经性能力有关.
- 驱动这些变化的特定分子机制仍然不完全理解.
研究的目的:
- 为了研究Epiregulin (EREG) 在新皮层发育和进化中的作用.
- 探索EREG的特定物种调节及其对基底原生细胞增殖的影响.
- 了解EREG对灵长类动物新皮层扩张的贡献.
主要方法:
- 在正在发育的人类新皮质和大猩猩大脑器官中分析EREG表达.
- 使用小鼠新皮质和人类/大猩猩皮质器官的体外研究.
- 操纵EREG表达 (添加/删除) 和评估基底原生细胞增殖.
- 研究EPIREGULIN与表皮生长因子 (EGF) 受体通路之间的相互作用.
- 识别可能控制EREG表达的cis-regulatory元素.
主要成果:
- 人类和大猩猩的新皮质表达了EREG,但老鼠的新皮质并没有表达.
- 在小鼠模型中,EPIREGULIN增强了基底原生细胞的增殖.
- 经过EREG切除,可以减少人类皮质器官的增殖.
- EPIREGULIN进一步增加了大猩猩的繁殖,但不是人类的有机体.
- EPIREGULIN在受体结合方面与EGF竞争,从而影响增殖.
- 确定了与EREG表达的物种间差异相关的假定cis-regulatory元素.
结论:
- 特定物种对EPIREGULIN表达的调节是灵长类动物新皮层扩张的关键因素.
- EREG 作为可调节的基底前细胞在腹腔下区域的增殖信号.
- 这种机制有助于在灵长类动物中观察到的新皮质大小增加.
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