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歧视等社会因素并没有改变TOMM40基因对认知衰退的影响. 然而,歧视预测APOE-ε4+载体的下降速度更快,这表明对社会压力因素的遗传脆弱性.

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科学领域:

  • 神经科学是一个神经科学.
  • 遗传学 是一个遗传学.
  • 社会流行病学 社会流行病学

背景情况:

  • 歧视和孤独等社会决定因素与黑人美国人的认知能力下降有关.
  • TOMM40基因变异,特别是TOMM40-'523-S,与APOE基因型相互作用并影响认知轨迹.
  • 社会因素和TOMM40-'523-S对黑人老年人认知能力的综合影响仍未得到充分研究.

研究的目的:

  • 调查社会因素 (歧视,孤独) 是否会改变TOMM40-'523-S基因型与认知衰退之间的关联.
  • 检查TOMM40-'523-S,APOE基因型和社会因素之间的相互作用,以预测黑人老年人队列中的认知轨迹.

主要方法:

  • 使用线性混合效应模型,对436名没有痴呆症的非西班牙裔黑人参与者的数据进行分析.
  • 评估了TOMM40-'523-S副本 (0,1或2) 在APOE基因型 (ε3/ε3或 ε4+) 和社会因素 (歧视,孤独) 对全球和特定领域认知的影响.
  • 控制年龄,教育程度,性别和从基线开始的时间,平均9.5年的随访时间.

主要成果:

  • 社会因素没有调解TOMM40-'523-S与认知衰退之间的关系.
  • 经历歧视的APOE-ε4+载体显示工作记忆和感知速度的加速下降.
  • 孤独与认知能力下降无关,但歧视和孤独的基线影响因APOE基因型而异.

结论:

  • 社会因素没有影响TOMM40-'523-S对认知衰退的影响.
  • 歧视预测认知能力下降,特别是在APOE-ε4+携带者身上,突出了他们的高度脆弱性.
  • 基线认知受到基于APOE基因型的社会因素的差异影响.