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Article Publish Status: FREE
Abstract Title:

Phase I safety trial of intravenous ascorbic acid in patients with severe sepsis.

Abstract Source:

J Transl Med. 2014 Jan 31 ;12:32. Epub 2014 Jan 31. PMID: 24484547

Abstract Author(s):

Alpha A Fowler, Aamer A Syed, Shelley Knowlson, Robin Sculthorpe, Don Farthing, Christine DeWilde, Christine A Farthing, Terri L Larus, Erika Martin, Donald F Brophy, Seema Gupta, , Bernard J Fisher, Ramesh Natarajan

Article Affiliation:

Alpha A Fowler

Abstract:

BACKGROUND: Parenterally administered ascorbic acid modulates sepsis-induced inflammation and coagulation in experimental animal models. The objective of this randomized, double-blind, placebo-controlled, phase I trial was to determine the safety of intravenously infused ascorbic acid in patients with severe sepsis.

METHODS: Twenty-four patients with severe sepsis in the medical intensive care unit were randomized 1:1:1 to receive intravenous infusions every six hours for four days of ascorbic acid: Lo-AscA (50 mg/kg/24 h, n = 8), or Hi-AscA (200 mg/kg/24 h, n = 8), or Placebo (5% dextrose/water, n = 8). The primary end points were ascorbic acid safety and tolerability, assessed as treatment-related adverse-event frequency and severity. Patients were monitored for worsened arterial hypotension, tachycardia, hypernatremia, and nausea or vomiting. In addition Sequential Organ Failure Assessment (SOFA) scores and plasma levels of ascorbic acid, C-reactive protein, procalcitonin, and thrombomodulin were monitored.

RESULTS: Mean plasma ascorbic acid levels at entry for the entire cohort were 17.9± 2.4 μM (normal range 50-70 μM). Ascorbic acid infusion rapidly and significantly increased plasma ascorbic acid levels. No adverse safety events were observed in ascorbic acid-infused patients. Patients receiving ascorbic acid exhibited prompt reductions in SOFA scores while placebo patients exhibited no such reduction. Ascorbic acid significantly reduced the proinflammatory biomarkers C-reactive protein and procalcitonin. Unlike placebo patients, thrombomodulin in ascorbic acid infused patients exhibited no significant rise, suggesting attenuation of vascular endothelial injury.

CONCLUSIONS: Intravenous ascorbic acid infusion was safe and well tolerated in this study and may positively impact the extent of multiple organ failure and biomarkers of inflammation and endothelial injury.

TRIAL REGISTRATION: ClinicalTrials.gov identifier NCT01434121.

Study Type : Human Study

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