一种与自闭症相关的新型UBLCP1突变影响了蛋白质酶调节/活动
Jihane Soueid1, Zeinab Hamze1, Joe Bedran1
1Department of Biochemistry and Molecular Genetics, American university of Beirut, Beirut, Lebanon.
Translational psychiatry
|December 21, 2023
概括
在黎巴嫩,一种与自闭症谱系障碍 (ASD) 相关的新型UBLCP1基因删除导致蛋白质酶活性增加. 这一发现为ASD病原体和潜在的治疗点提供了新的见解.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 在黎巴嫩的自闭症谱系障碍 (ASD) 患病率受到独特的遗传因素的影响,例如高血缘关系.
- 在一个患有自闭症的黎巴嫩家庭中,发现了UBLCP1基因的特定遗传缺失.
- 无素-蛋白酶体系统 (UPS) 在细胞蛋白质平衡中起着至关重要的作用.
研究的目的:
- 调查遗传UBLCP1删除对ASD的UPS和蛋白解的影响.
- 了解已识别的UBLCP1变种的功能后果.
- 探索与UBLC1突变相关的ASD的潜在治疗干预措施.
主要方法:
- 在一个患有ASD的黎巴嫩家庭中,进行了整体外基因组测序.
- 使用患者衍生纤维细胞进行了UBLCP1变异的功能评估.
- 分析了蛋白质酶活性,无处不在的蛋白质水平和基因表达.
- 实验涉及蛋白质酶抑制 (MG132) 和过早终止的编码子读透 (gentamicin).
主要成果:
- 在UBLCP1第10个表原体中发现了一种致病性缺失,导致过早停止编码.
- 突变导致UBLCP1蛋白表达减少和蛋白质酶活性增加.
- 观察到其他蛋白酶子单元的下调和NRF1水平的改变.
- 亨塔米辛治疗恢复了UBLC1的表达和功能.
结论:
- 在UBLCP1中,与ASD相关的突变导致细胞蛋白解的过度活化.
- 这会破坏蛋白酶子单元表达的调节,作为补偿机制.
- 这些发现突出了UBLCP1作为ASD的潜在遗传因素,并建议治疗途径.
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