老年人的血小板表现出线粒体功能的差异,与葡萄糖代谢受损有关
Gargi Mahapatra1, Zhengrong Gao2, James Bateman3,2
1Division of Geriatrics, Gerontology, and Palliative Care; Department of Medicine, University of California San Diego School of Medicine, La Jolla, CA, USA.
Clinical science (London, England : 1979)
|December 3, 2025
概括
葡萄糖耐受性 (IGT) 和胰岛素耐受性受损与独特的血小板线粒体生物能学有关,在IGT个体中显示出更高的呼吸率和脂肪酸氧化. 这些发现为与年龄相关的疾病发展提供了洞察力.
科学领域:
- 线粒体的生物能量学
- 代谢障碍 代谢障碍 代谢障碍
- 衰老的研究研究.
背景情况:
- 葡萄糖耐受性 (IGT) 和胰岛素耐药性受损,包括糖尿病前期和糖尿病,增加与年龄有关的疾病风险,如心血管,脏和阿尔茨海默氏症等疾病.
- 血小板,可访问的血细胞,越来越多地研究它们的线粒体功能,作为系统代谢健康的潜在生物标志物.
研究的目的:
- 调查老年人与或没有葡萄糖耐受性 (IGT) 和胰岛素耐药性之间的血小板线粒体生物能学的差异.
- 在老年人中,探索血小板线粒体功能与葡萄糖耐受度 (包括HbA1c) 的相关性.
主要方法:
- 分析了208名IGT/胰岛素耐药和不耐药的成年人 (≥55岁) 血小板的线粒体生物能学.
- 测量了血小板呼吸,葡萄糖和脂肪酸氧化能力.
- 进行了线粒体生物能参数和葡萄糖耐受度测量 (OGTT_120,OGTT_AUC,HbA1c) 之间的相关性.
主要成果:
- 来自IGT参与者的血小板表现出明显更高的线粒体呼吸,依赖葡萄糖的能力 (Max,SRC) 和依赖脂肪酸氧化 (FAO) 的呼吸 (MaxOXPHOS,MaxETS),与正常血糖 (NG) 个体相比.
- 在所有参与者中,血小板生物能学和葡萄糖耐受度 (OGTT_120,OGTT_AUC,HbA1c) 之间发现了显著的积极关联,基本上独立于年龄,性别和BMI.
- 在NG个体中,血小板呼吸和HbA1c是积极相关的,SRC,FAO,FAO+CI和HbA1c之间有特定的联系;在IGT组中没有发现这种关联.
结论:
- 血小板线粒体的生物能量概况在有或没有受损葡萄糖耐受性和胰岛素耐药性的个体之间有显著差异.
- 血小板线粒体功能与老年人的葡萄糖耐受度相关,这表明其作为生物标志物的潜力.
- 这些发现为胰岛素耐药性影响血小板线粒体生物能学的临床表现提供了新的见解,这与与年龄相关的疾病研究有关.
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