高脂肪摄入量对尿路酸化参数的急性影响
Alireza Zomorodian1, Xilong Li2, John Poindexter1
1Charles and Jane Pak Center for Mineral Metabolism and Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas, USA.
Kidney international reports
|July 18, 2025
概括
尿酸结石形成者在氨分泌中存在慢性缺陷,与脂肪负载后分泌减少的对照群不同. 限制饮食脂肪可能不足以控制他们的酸性尿液.
科学领域:
- 腎臟病學 (nephrology) 是一種醫學.
- 代谢障碍 代谢障碍 代谢障碍
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
背景情况:
- 尿酸石病越来越普遍,与肥胖和酸性尿液pH (UpH) 有关.
- 酸性UpH部分来源于减少的氨 (NH3) 对H+的缓冲.
- 靠近管中的脏氨基生成产生NH3,对于酸平衡至关重要.
研究的目的:
- 研究是否自由脂肪酸 (FFAs) 降低尿酸结石形成者 (UASFs) 和对照者 (Ctrls) 的氨生成.
- 评估饮食脂肪负载作为替代能源基质对脏氨基生成的影响.
主要方法:
- 七个UASF和8个Ctrl进行了为期4天的固定代谢饮食.
- 收集了禁食尿液和血液样本,随后进行了10小时的口服脂肪负荷和连续采样.
主要成果:
- 两组都显示血清FFA的增加类似.
- 与Ctrls (6.6) 相比,UASF的基线UpH (5.3) 持续较低,在Ctrls中显著下降,但在脂肪负载期间UASF没有显著下降.
- 在UASF中,氨 (NH4+) 与净酸分泌 (NAE) 的比率在基线时较低,并且在脂肪负载期间在两组中均下降.
结论:
- 对照显示,随着脂肪负荷的增加,NH4+分泌量减少,这表明基质切换.
- UASFs在NH4+分泌中表现出慢性缺陷,这表明近接管功能受脂毒损害.
- 仅仅限制饮食脂肪可能不足以控制UASFs中的酸性尿症.
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