CK1δ/ε激酶调节TDP-43酸化,并且是与ALS相关的TDP-43过酸化的治疗标
Vivian I Ko1, Kailee Ong2, Don W Cleveland3
1Neuroscience Graduate Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0624, USA; Department of Neurosciences, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0624, USA.
氨酸激酶1delta/epsilon (CK1δ/ε) 直接酸化TARDNA结合蛋白43 (TDP-43),导致其在像ALS这样的神经退行性疾病中的聚合. 抑制CK1δ/ε可以减少病态TDP-43的酸化和聚合.
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
- 生物化学 生物化学
背景情况:
- 过酸化的TDP-43聚合物是肌缩侧面硬化症 (ALS) 和其他TDP-43蛋白质病变的关键标志.
- 驱动TDP-43酸化的精确机制在很大程度上是未知的.
- 以前的研究表明,CSNK1E基因 (编码CK1ε) 与化TDP-43 (pTDP-43) 病理之间存在相关性.
研究的目的:
- 研究CK1ε和相关CK1δ激酶在调解TDP-43酸化中的作用.
- 为了验证TDP-43和CK1δ/ε之间的直接相互作用.
- 在TDP-43蛋白病变的细胞模型中评估向CK1δ/ε的治疗潜力.
主要方法:
- 通过激酶活性测定和生物信息分析,验证了TDP-43对CK1δ和CK1ε的结合.
- 采用了新的诱导性细胞模型来研究pTDP-43的转移和聚合.
- 利用siRNA和小分子抑制剂来降低CK1激酶活性.
- 在化TDP-43.3中比较了CK1δ/ε对其他激酶 (CK2α,CDC7,ERK1/2,p38α/MAPK14,TTBK1) 的疗效.
- 分析了可溶和不可溶的TDP-43蛋白质部分.
主要成果:
- 证实了TDP-43与CK1δ和CK1ε之间的直接结合和相互作用.
- 证明,降低CK1激酶活性显著降低了可溶和不可溶分量的pTDP-43水平.
- 确立了CK1δ和CK1ε作为负责TDP-43酸化的主要激酶,其表现优于其他测试的激酶.
- 在CK1抑制后,在细胞模型中观察到降低的pTDP-43和细胞质聚合.
结论:
- CK1δ和CK1ε是驱动TDP-43高酸化和聚合的关键激酶.
- CK1δ/ε抑制剂代表了TDP-43蛋白质病变的有前途的治疗策略.
- 准CK1激酶为治疗特征为TDP-43病理的神经退行性疾病提供了潜在的途径.
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