阿尔茨海默病风险基因MS4A4A和MS4A6A合作,对TREM2和微质状态进行负面调节
Dalya Rosner1, Jiahong Sun1, Rita Cacace2
1Alector, Inc., South San Francisco, CA 94080, USA.
Neuron
|December 23, 2025
概括
MS4A4A和MS4A6A蛋白质对Triggering Receptor Expressed on Myeloid cells 2 (TREM2) 和微质功能进行负调节,影响阿尔茨海默病 (AD) 病理学,并提供潜在的治疗点.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
背景情况:
- 在MS4A4A和MS4A6A中的遗传变异与阿尔茨海默病 (AD) 风险有关.
- 在骨髓细胞表达的触发受体2 (TREM2) 在微质功能和AD病变发生过程中起着至关重要的作用.
- 大脑脊髓液中可溶的TREM2水平与AD进展有关.
研究的目的:
- 研究MS4A4A和MS4A6A在TREM2表达和微质功能中的调节作用.
- 阐明MS4A4A和MS4A6A影响TREM2水平和微质活动的分子机制.
- 评估针对阿尔茨海默病的MS4A4A和MS4A6A的治疗潜力.
主要方法:
- 在细胞培养 (巨细胞,微质细胞) 和体内模型 (非人类灵长类动物,粉样鼠标模型) 中调节MS4A4A表达 (淘汰赛,过度表达,抗体介导降解).
- 评估TREM2蛋白水平 (跨膜和可溶性形式).
- 评估微质功能,包括活力,细胞和 lysosomal 活动.
- 涉及蛋白质与蛋白质相互作用和复合体形成的机制研究 (MS4A4A,MS4A6A,DAP12).
主要成果:
- MS4A4A和MS4A6A作为跨膜和可溶性TREM2的负调节剂.
- MS4A4A对微质活力,细胞化和溶酶体功能产生负面影响.
- MS4A4A通过防止其降解来稳定MS4A6A,MS4A6A与共同受体DAP12复合并抑制它.
- 这些相互作用间接调节TREM2水平和下游信号.
结论:
- MS4A4A和MS4A6A是TREM2和微质功能的合作后转录负调节者.
- MS4A4A和MS4A6A的失调有助于阿尔茨海默病的病理学.
- MS4A4A和MS4A6A是阿尔茨海默病治疗的潜在治疗点.
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