网络低活性在ALG13-CDG:被破坏的发展途径和E/I不平衡作为早期驱动器的神经特征在CDG
Rameen Shah1,2,3,4, Rohit Budhhraja5, Silvia Radenkovic1,6
1Department of Clinical Genomics, Mayo Clinic, Rochester, MN 55905, USA.
13型糖化先天性疾病 (ALG13-CDG) 导致脑特异性低糖化,扰乱神经发育和皮质网络功能. 这导致早期网络低活性和错误的神经元成熟,最终导致发作的脆弱性.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- ALG13-CDG是一种X关联疾病,由于ALG13基因中的病原性变异影响了糖化.
- 它会导致严重的神经问题,但它对人类大脑糖化和神经发育的影响尚不清楚.
- 这项研究调查了ALG13-CDG导致脑特异性低糖化,破坏神经发育途径和皮质网络功能的假设.
研究的目的:
- 在ALG13-CDG中定义低糖化对皮质发育和功能的影响.
- 研究ALG13-CDG的神经表现背后的分子机制.
主要方法:
- 从ALG13-CDG患者产生的诱导多能干细胞衍生的人类皮质器官 (hCOs).
- 使用多电极阵列 (MEA) 记录评估电生理活动.
- 进行了综合的多原子分析,包括scRNA-seq,蛋白质组学,葡萄糖组学,N-葡萄糖成像学,脂质组学和代谢组学.
主要成果:
- ALG13-CDG hCOs在ECM组织,神经元迁移,脂质新陈代谢,平衡和神经元刺激性至关重要的蛋白质中表现出减少的糖化.
- 轨迹分析揭示了神经元成熟的错误时间,早期的抑制和延迟的刺激发育,表明刺激/抑制 (E/I) 不平衡.
- MEA记录显示了早期网络低活性,不成熟的爆发结构和改变的轴突投射,以及转录和蛋白质的签名表明新兴的过度刺激性.
结论:
- ALG13-CDG是一种以大脑特异性低糖化为特征的疾病,它破坏神经发育途径并破坏皮质网络功能的稳定.
- 综合分析发现了早期的网络低活性,错时的神经元成熟,以及逐渐演变的E/I不平衡进展到补偿性过度兴奋,解释了发作的脆弱性.
- 这些发现确定ALG13-CDG是皮质网络不稳定的疾病,为有针对性的治疗干预提供了基础.
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