核糖体蛋白RPS6KC1中的双基变异会导致复杂的神经发育障碍
Laura Planas-Serra1, Mar Rodríguez-Ruiz1, Eric Nathaniel Anderson2
1Neurometabolic Diseases Laboratory, Bellvitge Biomedical Research Institute (IDIBELL), L'Hospitalet de Llobregat, Barcelona, Catalonia, Spain; Centre for Biomedical Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.
核糖体蛋白S6激酶C1 (RPS6KC1) 中的突变通过破坏蛋白质合成,脂质信号传递和mTOR通路,导致神经发育障碍. 这项研究确定了RPS6KC1在细胞功能和疾病中的新角色.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 核糖体蛋白S6激酶家族成员在疾病中至关重要.
- 核糖体蛋白S6激酶C1 (RPS6KC1) 功能在很大程度上是未知的,尽管它在基-1-酸盐信号传递和基-3 (PRDX3) 运输中的作用.
研究的目的:
- 研究RPS6KC1在人类疾病和细胞功能中的作用.
- 确定RPS6KC1相关神经发育障碍背后的分子机制.
主要方法:
- 整体外体序列测定用于识别受影响个体中的RPS6KC1变异.
- 使用患者衍生细胞 (PBMC) 和细胞系 (HAP1) 的功能研究.
- 在使用Drosophila melanogaster模型的体内研究.
主要成果:
- 在8个家庭的13个个体中发现了双基RPS6KC1变体,呈现出神经发育延迟,低血压,性和白质损失.
- 缺少RPS6KC1导致RPS6酸化减少,核糖体蛋白质合成受损,PRDX3和氨酸激酶1 (SPHK1) 相互作用体减少,并抑制mTOR/PI3K通路活性.
- 细胞中RPS6KC1的淘汰表明PRDX3和SPHK1的内分体定起作用;Drosophila模型显示出运动器官功能障碍,寿命缩短和mTOR活性降低.
结论:
- RPS6KC1对神经发育至关重要,调节核糖体蛋白质合成,脂质信号传递和mTOR通路.
- RPS6KC1变种会导致一系列的神经发育和神经系统疾病.
- RPS6KC1在内分体定中的功能及其对细胞通路的影响突显了其至关重要的生物重要性.
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