mTOR通路基因淘汰导致mTOR依赖的细胞聚合.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
细胞聚合是一种mTOR依赖的表型,用于皮质发育形 (MCD). 这一发现在基因编辑细胞和人体组织中观察到,涉及的mTOR信号传递.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 与mTOR通路基因 (MPG) 相关的皮质发育形 (MCD) 是耐药性的主要原因.
- 与MPG相关的MCD通常表现为细胞巨变,皮质失层和神经元聚合物.
研究的目的:
- 调查细胞聚合是否是MPG相关的MCD中mTOR依赖的表型.
- 确定MCD中细胞聚合的基础分子机制.
主要方法:
- 在N2a细胞中的MPG (Tsc2,Nprl3,Stradα,Kptn) 的CRISPR/Cas9基因淘汰.
- 对于酸化核糖体S6蛋白 (PS6) 的西部涂抹,以评估mTOR激活.
- 时间延迟活细胞成像,细胞增殖和细胞死亡分析.
- 液体染色学-质谱学 (LC-MS/MS) 用于聚合物的蛋白质组分析.
- 人类MCD脑组织的免疫组织化学染色用于PS6.
主要成果:
- 所有的淘汰赛线在体外形成了多细胞聚合物,这些聚合物被mTORC1抑制 (拉帕米) 消除.
- 聚合独立于细胞增殖,细胞亡,亡或细胞外DNA.
- 蛋白质组分析揭示了聚合物中粘附分子,细胞骨蛋白和蛋白质加工/运输因子的改变表达.
- 人类MCD组织在神经元集群中增加了PS6染色.
结论:
- 异常细胞聚合是MPG相关的MCD中的一个mTOR依赖的表型.
- 粘附分子的改变表达可能导致MCD中异常的细胞聚合和皮质层状.
- 这些发现为MCD中的发病因子提供了洞察力,并建议潜在的治疗点.
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