在成年后期白质病变,脂肪和全身炎症之间的关联:IGNITE研究的结果
Shivangi Jain1, Patricio Solis-Urra2, Alina Lesnovskaya3
1AdventHealth Research Institute, Neuroscience Institute, Orlando, USA.
Brain, behavior, and immunity
|December 20, 2025
概括
过多的内脏和腹部脂肪通过炎症与大脑病变 (WMLs) 有关. 管理炎症和体重可能有助于老年人的大脑健康.
科学领域:
- 神经科学是一个神经科学.
- 老年学是一门学科.
- 心血管科学 心血管科学
背景情况:
- 白质超强度 (WMLs) 与认知能力下降和痴呆风险有关.
- 心脏代谢因素和全身炎症与WML体积增加有关.
- 特定的脂肪组织储存和它们与由炎症介导的WMLs的关系需要进一步调查.
研究的目的:
- 检查特定脂肪组织部分 (内脏和腹部皮下) 与身体总脂肪和WML体积之间的关联.
- 调查这些关联是否由低级系统性炎症标记物 (IL-6,IL-1RA,TNF-α) 介导.
主要方法:
- 利用IGNITE研究中的648名老年人的基线数据 (平均年龄69.9岁,70.5%是女性).
- 使用双能X射线吸收计 (DXA) 测量了相对内脏脂肪组织 (rVAT) 和相对腹部皮下脂肪组织 (rASAT).
- 评估WML体积和炎症性细胞因子 (IL-6,IL-1RA,TNF-α) 的度,控制年龄,性别,教育和高血压等共变量.
主要成果:
- 较高的rVAT和rasat都与较大的WML体积有关.
- 这些关系在统计学上是由IL-6和TNF-α水平升高的介导,这表明炎症途径.
- 假设得到了部分支持,突出了炎症在将特定脂肪储存与WMLs联系中的作用.
结论:
- 内脏和腹部皮下脂肪组织的增加与白质超强度的较高负担有关.
- 系统性炎症,特别是IL-6和TNF-α,在这种关系中起着调解作用.
- 研究结果表明,老年人大脑健康的潜在治疗点,重点是减少炎症和控制体重.
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