Shank3通过mGlu5调节Rpl3表达和蛋白质合成:对Phelan McDermid综合征的影响
Federica Giona1, Stefania Beretta1,2, Antonio Zippo1
1CNR, Neuroscience Institute, Milano, Italy.
Molecular psychiatry
|March 16, 2025
概括
克3基因突变损害了蛋白质合成,导致自闭症谱系障碍和菲兰·麦克德米德综合征症状. 恢复核糖体蛋白Rpl3的表达减轻了这些缺陷在小鼠模型.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- SHANK3基因突变与自闭症谱系障碍 (ASD) 和Phelan McDermid综合征 (PMS) 有关.
- 突触功能障碍是Shank3缺乏的一个已知的后果.
- 除了受到Shank3影响的突触功能之外的机制尚不清楚.
研究的目的:
- 研究Shank3在调节神经元功能的新机制.
- 探索蛋白质合成在Shank3相关的神经发育障碍中的作用.
- 确定Shank3相关疾病的潜在治疗点.
主要方法:
- 利用了Shank3淘汰赛 (KO) 鼠标模型和来自PMS患者的人类诱导多能干细胞 (hiPSCs).
- 在神经元组织中评估了核糖体蛋白Rpl3表达和全球蛋白质合成.
- 研究了mGlu5受体调节对Rpl3表达和蛋白质合成的影响.
- 在治疗干预后,在Shank3 KO小鼠中评估行为结果.
主要成果:
- 在老鼠和人类神经元模型中,Shank3缺乏导致Rpl3下调和蛋白质合成受损.
- 在Shank3 KO小鼠中恢复Rpl3表达,挽救了蛋白质合成,并减少了过度理等行为异常.
- 抑制mGlu5受体降低了Rpl3表达和蛋白质合成.
- 使用mGlu5阳性全调节剂 (VU0409551) 的治疗逆转了Rpl3下调,恢复了蛋白质合成,并改善了行为缺陷.
结论:
- 尚克3在调节核糖体蛋白Rpl3表达和整体蛋白质合成方面发挥着至关重要的作用.
- 低调Rpl3和受损的蛋白质合成有助于Shank3缺乏的行为缺陷.
- 调节mGlu5受体活性代表了Shank3相关疾病的有前途的治疗策略.
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