4.7 Article

A randomized-controlled trial of arginine infusion in severe sepsis on microcirculation and metabolism

期刊

CLINICAL NUTRITION
卷 39, 期 6, 页码 1764-1773

出版社

CHURCHILL LIVINGSTONE
DOI: 10.1016/j.clnu.2019.08.013

关键词

Sepsis; Arginine; Tonometry; Laser Doppler flowmetry; Hemodynamics; Nitric oxide

资金

  1. Novartis Consumer Health

向作者/读者索取更多资源

Background & aims: Sepsis is hypothesized as an arginine deficient state, with lack of nitric oxide (NO) for adequate microcirculation and local perfusion. This study aimed to investigate if prolonged (72-h) intravenous L-arginine administration in sepsis patients improves microcirculation. Secondly, effects on arginine and protein metabolism, and organ function were studied. Methods: Critically ill patients with a diagnosis of septic shock participated in a long-term (72 h) randomized double-blind placebo-controlled parallel-group study. L-arginine-HCl (1.2 mu mol kg(-1) min(-1); n = 9) or L-alanine (isocaloric control: 2.4 mu mol kg(-1) min(-1); n = 9) was continuously infused. Primary study outcome was microcirculation, assessed as gastric mucosal perfusion by gastric tonometry (Pr-aCO2 gap) and skin perfusion by Laser Doppler flowmetry. Secondary endpoints were whole body (WB) arginine and protein metabolism, organ function and clinical outcomes. We measured global hemodynamics continuously for safety monitoring. Statistical analyses were performed by mixed model for repeated measures with treatment by time interaction as estimate for between-group difference. Results: Pr-aCO2 increased only in the L-arginine group (p = 0.006), without a significant between-group difference (p = 0.17). We found no significant differences in skin perfusion parameters. L-arginine infusion resulted in a larger increase of plasma arginine and ornithine concentrations (p < 0.01), WB (endogenous) arginine appearance (p < 0.001), WB NO synthesis (p = 0.027) and WB arginine to urea conversion (p < 0.001) than infusion of L-alanine. We found no effect on global hemodynamics, and protein metabolism by L-arginine infusion. Organ function parameters were unaffected, except for a significant difference between groups in intra-abdominal pressure over time (p = 0.029). Conclusions: Prolonged intravenous L-arginine administration does not improve local perfusion and organ function despite an increase in WB NO synthesis. Administration is safe with regard to global hemodynamics, but the observed increase in Pr-aCO2 and intra-abdominal pressure warrants careful application of L-arginine infusion and further research, especially in the early stage of septic shock. (C) 2019 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据