肝脏脂肪积累,氧化和分泌的不同途径在脂质营养不良与与肥胖相关的NAFLD相比
Rachael J Klein1, Gracia M Viana Rodriguez2, Yaron Rotman2
1Section on Translational Diabetes and Metabolic Syndromes, Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland, USA.
部分脂质变 (PL) 中的脂肪性肝病和与肥胖相关的非酒精性脂肪性肝病 (NS-NAFLD) 在PL中表现出类似的肝脂肪,但更高的胰岛素耐药性. 与NS-NAFLD不同,PL表现出增加的脂肪氧化和脂肪出口.
科学领域:
- 代谢综合征是代谢综合征的一种.
- 肝病学 肝病学是一种肝病学.
- 内分泌学 在内分泌学.
背景情况:
- 脂肪肝在肥胖和局部脂质缩 (PL) 综合征中普遍存在,这两种综合征都与胰岛素抵抗有关.
- 肝硬化 (脂肪肝) 是肥胖和PL中常见的并发症,胰岛素抵抗在其发展中发挥着中心作用.
- 了解胰岛素抵抗和脂肪组织功能障碍对PL脂肪肝与非综合征性NAFLD (NS-NAFLD) 的不同贡献对于向治疗至关重要.
研究的目的:
- 在PL和NS-NAFLD之间比较胰岛素抵抗和脂肪组织在肝硬化病原体中的作用.
- 为了研究脂肪积累和清除在肝脏的差异性机制,这两个条件.
- 阐明在PL和NS-NAFLD中对胰岛素抵抗和肝脂肪含量的各种测量之间的关系.
主要方法:
- 一项横截面研究比较了73名NS-NAFLD患者和27名PL患者.
- 使用FibroScan®控制衰减参数 (CAP) 量化肝脂肪.
- 用HOMA-IR,Adipo-IR和基于NMR的LP-IR评估胰岛素耐药性,同时测量了血中自由脂肪酸,β-基酸和富含三糖的大型脂蛋白颗粒.
主要成果:
- 肝脏脂肪含量 (CAP) 在PL和NS-NAFLD组之间是可比的 (304对324dB/m).
- 在所有评估指标 (HOMA-IR,Adipo-IR,LP-IR) 中,胰岛素耐药性在PL中明显高于NS-NAFLD.
- 虽然两组肝脂肪与HOMA-IR相关,但PL显示β-氧化和VLDL分泌标记较高,表明脂肪氧化和输出增强,与NS-NAFLD相比,脂肪处理机制不同.
结论:
- 肝硬化症在PL和NS-NAFLD中是相似的,尽管PL的胰岛素抵抗性更大.
- 部分脂质缩与增加的甘油三氧化和VLDL分泌有关,表明脂肪从肝脏转移到循环中的补偿转移.
- 这些发现突出了与NS-NAFLD相比,PL中脂肪肝的独特病理生理路径,表明不同的治疗点.
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