变化24(S) - 基胆固醇与早期亨廷顿病的认知表现有关:来自TRACK和ENROLL HD队列的数据
Sarah M Gray1, Jing Dai1, Anne C Smith1
1Sage Therapeutics Inc, Cambridge, MA, USA.
Journal of Huntington's disease
|September 13, 2024
概括
胆固醇代谢物24(S) -水合胆固醇 (24(S) -OHC) 水平在亨廷顿病 (HD) 早期发生变化,影响N-甲基-D-酸盐 (NMDA) 受体功能. 较低的24(S) -OHC和改变的氧胆固醇比率与HD患者的认知缺陷相关.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 遗传学 是一个遗传学.
背景情况:
- 有证据表明,在亨廷顿病 (HD) 中,胆固醇平衡受损.
- 大脑胆固醇代谢物24(S) -氧胆固醇 (24(S) -OHC) 在明显的HD中减少.
- 降低的24(S) -OHC可能会损害N-甲基-D-酸盐 (NMDA) 受体功能,可能导致HD的认知缺陷.
研究的目的:
- 在NMDA受体上研究氧化醇 (24(S) -OHC,25-OHC,27-OHC) 之间的相互作用.
- 测量早期HD患者的血氧化水平.
- 为了将氧水平与早期HD的认知表现相关联.
主要方法:
- 在体外竞争试验中评估了NMDA受体上的氧相互作用.
- 液体染色学-双重质谱法 (LC-MS/MS) 量化了血中氧化水平.
- 在TRACK和ENROLL-HD研究中,相关性分析检查了氧胆固醇水平与认知终点之间的关系.
主要成果:
- 在体外,25-OHC和27-OHC降低了24-S) -OHC在NMDA受体上的阳性全调节器活性.
- 患有早期HD的参与者表现出较低的血24S-OHC水平和24S/25-OHC比率.
- 血24(S) /25-OHC比率显示了与认知表现 (Stroop,Symbol Digit,Trails A/B,情绪识别) 的中度关联,但没有精神病或运动症状.
结论:
- 这些发现支持HD中中枢神经系统胆固醇代谢的失调.
- 血氧胆固醇水平的变化,特别是24(S) /25-OHC比率,与早期HD的认知表现有关.
- 由于NMDA受体的低功能,可能是由于氧胆固醇调节的改变,可能是HD认知障碍的基础.
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