代谢不健康的脂肪组织的特点是线粒体大小和功能减少
Darla DeStephanis1, Masha R Long1, Abigail G Williams1
1Department of Pathology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA.
Obesity (Silver Spring, Md.)
|February 14, 2025
概括
线粒体大小,而不是脂肪质量,影响代谢健康. 准线粒体融合可能会改善代谢综合征的非人类灵长类动物 (NHPs) 的代谢健康.
科学领域:
- 代谢健康和内分泌学
- 线粒体生物学 线粒体生物学
- 灵长类的新陈代谢
背景情况:
- 代谢健康与脂肪组织功能密切相关,而不是其质量.
- 非人类灵长类动物 (NHPs) 作为研究代谢综合征的有价值模型,自然表现出各种肥胖和代谢功能障碍.
- 脂肪组织中的线粒体功能障碍是区分代谢健康的潜在关键因素,无论整体脂肪程度如何.
研究的目的:
- 研究线粒体特征在皮下脂肪组织 (SQ AT) 和外周血液单核细胞 (PBMC) 中与NHPs代谢健康有关的作用.
- 为了确定是否与代谢综合征的NHPs中的线粒体变化与脂肪或代谢功能障碍有关.
主要方法:
- 在44个具有不同肥胖程度的NHP中评估了SQAT组织学,电子显微镜,蛋白质分析和生物能量学.
- 在SQ AT.中评估了线粒体大小,丰富度,融合和质量控制蛋白质.
- 测量生物能量指数在隔离的肌体血管细胞和PBMC中.
主要成果:
- 与健康的NHP相比,不健康的NHP表现出明显较小的脂肪细胞线粒体,尽管脂肪细胞大小相似.
- 在不健康的NHP的SQ AT中观察到线粒体融合和质量控制蛋白质的缺陷,与组织呼吸减少相关.
- 线粒体大小,但不是丰富度或整体指标,与代谢不健康特别相关,独立于脂肪.
- 在不健康的NHP中,PBMC生物能效升高,这表明免疫激活和与SQAT炎症标志物相关.
结论:
- 脂肪细胞线粒体的大小和功能,特别是融合过程,是代谢健康的关键决定因素.
- 准线粒体融合是改善代谢健康的有希望的治疗策略,独立于身体脂肪质量.
- 脂肪组织中的线粒体缺陷是NHPs代谢综合征的关键特征,与一般肥胖症不同.
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