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Altered proximal tubular cell glucose metabolism during acute kidney injury is associated with mortality.
Nature Metabolism ( IF 20.8 ) Pub Date : 2020-07-20 , DOI: 10.1038/s42255-020-0238-1
David Legouis 1, 2 , Sven-Erick Ricksten 3 , Anna Faivre 1 , Thomas Verissimo 1 , Karim Gariani 4 , Charles Verney 5 , Pierre Galichon 5 , Lena Berchtold 1, 6 , Eric Feraille 7 , Marylise Fernandez 1 , Sandrine Placier 5 , Kari Koppitch 8 , Alexandre Hertig 5 , Pierre-Yves Martin 1, 9 , Maarten Naesens 6 , Jérôme Pugin 2 , Andrew P McMahon 8 , Pietro E Cippà 8, 10 , Sophie de Seigneux 1, 9
Affiliation  

Acute kidney injury (AKI) is strongly associated with mortality, independently of its cause. The kidney contributes to up to 40% of systemic glucose production by gluconeogenesis during fasting and under stress conditions. Whether kidney gluconeogenesis is impaired during AKI and how this might influence systemic metabolism remain unknown. Here we show that glucose production and lactate clearance are impaired during human and experimental AKI by using renal arteriovenous catheterization in patients, lactate tolerance testing in mice and glucose isotope labelling in rats. Single-cell transcriptomics reveal that gluconeogenesis is impaired in proximal tubule cells during AKI. In a retrospective cohort of critically ill patients, we demonstrate that altered glucose metabolism during AKI is a major determinant of systemic glucose and lactate levels and is strongly associated with mortality. Thiamine supplementation increases lactate clearance without modifying renal function in mice with AKI, enhances glucose production by renal tubular cells ex vivo and is associated with reduced mortality and improvement of the metabolic pattern in a retrospective cohort of critically ill patients with AKI. This study highlights an unappreciated systemic role of renal glucose and lactate metabolism under stress conditions, delineates general mechanisms of AKI-associated mortality and introduces a potential intervention targeting metabolism for a highly prevalent clinical condition with limited therapeutic options.



中文翻译:

急性肾损伤期间近端肾小管细胞葡萄糖代谢改变与死亡率相关。

急性肾损伤(AKI)与死亡率密切相关,而与病因无关。在禁食和压力条件下,肾脏通过糖异生作用贡献了高达40%的全身性葡萄糖生产。在AKI期间是否会损害肾糖原异生及其如何影响全身代谢尚不清楚。在这里,我们显示,在人类和实验性AKI中,通过使用患者的肾动静脉导管插入术,小鼠中的乳酸耐受性测试和大鼠中的葡萄糖同位素标记,会损害葡萄糖的产生和乳酸清除。单细胞转录组学揭示在AKI期间近端小管细胞的糖异生受损。在危重病人的回顾性队列中,我们证明在AKI期间改变的葡萄糖代谢是全身性葡萄糖和乳酸水平的主要决定因素,并且与死亡率密切相关。补充硫胺素可在不改变AKI小鼠的肾脏功能的情况下增加乳酸清除率,增加离体肾小管细胞的葡萄糖生成,并且与AKI重症患者回顾性队列研究的死亡率降低和代谢模式改善有关。这项研究强调了在应激条件下肾葡萄糖和乳酸代谢的全身性作用,描述了AKI相关死亡率的一般机制,并介绍了针对代谢的潜在干预措施,用于治疗条件有限的高度普遍的临床疾病。补充硫胺素可在不改变AKI小鼠的肾功能的情况下增加乳酸清除率,增加离体肾小管细胞的葡萄糖生成,并且与AKI重症患者回顾性队列研究的死亡率降低和代谢模式改善有关。这项研究强调了在应激条件下肾葡萄糖和乳酸代谢的全身性作用,描述了AKI相关死亡率的一般机制,并介绍了针对代谢的潜在干预措施,用于治疗条件有限的高度普遍的临床疾病。补充硫胺素可在不改变AKI小鼠的肾脏功能的情况下增加乳酸清除率,增加离体肾小管细胞的葡萄糖生成,并且与AKI重症患者回顾性队列研究的死亡率降低和代谢模式改善有关。这项研究强调了在应激条件下肾葡萄糖和乳酸代谢的全身性作用,描述了AKI相关死亡率的一般机制,并介绍了针对新陈代谢的潜在干预措施,用于治疗条件有限的高度普遍的临床疾病。增强了肾病重症患者回顾性队列研究的肾小管细胞离体产生葡萄糖的水平,并降低了死亡率并改善了代谢方式。这项研究强调了在应激条件下肾葡萄糖和乳酸代谢的全身性作用,描述了AKI相关死亡率的一般机制,并介绍了针对新陈代谢的潜在干预措施,用于治疗条件有限的高度普遍的临床疾病。可以增强肾小管细胞离体的葡萄糖生成,并与AKI危重患者回顾性队列的死亡率降低和代谢模式改善有关。这项研究强调了在应激条件下肾葡萄糖和乳酸代谢的全身性作用,描述了AKI相关死亡率的一般机制,并介绍了针对代谢的潜在干预措施,用于治疗条件有限的高度普遍的临床疾病。

更新日期:2020-07-20
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