Nordihydroguaiaretic acid reduces secondary organ injury in septic rats after cecal ligation and puncture

• Published in: PloS one Vol. 15; no. 8; p. e0237613
• Main Authors: Zubrow, Michael E., Margulies, Susan S., Yehya, Nadir
• Format: Journal Article
• Language: English
• Published: San Francisco Public Library of Science 13.08.2020; Public Library of Science (PLoS)
• Subjects: Abdomen; Alanine; Alanine transaminase; Anesthesia; Animals; Anti-inflammatory agents; Antioxidants (Nutrients); Biology and Life Sciences; Blood; Care and treatment; Cecum; Creatinine; Critical care; Cytokines; Drug dosages; Edema; Free radicals; Funding; Hospitals; Hypoxia; Inflammation; Injury prevention; Laboratories; Lactic acid; Lipid peroxidation; Lungs; Markers; Medicine and Health Sciences; Mortality; Multiple organ failure; Nordihydroguaiaretic acid; Ostomy; Oxygenation; Pediatrics; Plant extracts; Pluripotency; Pretreatment; Sepsis; Signal transduction; Software; Surgery; Survival; Testing; Tissues; Urea; United States; United States > US
• ISSN: 1932-6203; 1932-6203
• DOI: 10.1371/journal.pone.0237613

Background Nordihydroguaiaretic acid (NDGA) is a plant extract that has been shown to act as a free radical scavenger and pluripotent inhibitor of pro-inflammatory cytokines, two major cellular processes involved in the pathophysiology of sepsis. We investigated whether NDGA would improve markers of organ injury as well as survival in a rodent model of sepsis. Methods Abdominal sepsis was induced by cecal ligation and double puncture (CLP) in male Sprague-Dawley rats. NDGA was administered either at the time of injury (pre-) or 6 hours later (post-treatment). A sham surgery group and a vehicle only group were also followed as controls. Blood and lung tissue were collected 24 h after CLP. Lung tissue was used for histopathologic analysis and to measure pulmonary edema. Arterial oxygenation was measured directly to generate PaO2/FiO2, and markers of renal injury (blood urea nitrogen), liver injury (alanine aminotransferase), and tissue hypoxia (lactate) were measured. In a separate set of animals consisting of the same treatment groups, animals were followed for up to 36 hours for survival. Results NDGA pre-treatment resulted in improved oxygenation, less lung edema, lower lactate, lower BUN, and reduced histologic lung injury. NDGA post-treatment resulted in less lung edema, lower lactate, lower BUN, and less histologic lung injury, but did not significantly change oxygenation. None of the NDGA treatment groups statistically affected ALT or creatinine. NDGA pre-treatment showed improved survival compared with control CLP animals at 36 hours, while post-treatment did not. Conclusions NDGA represents a novel pleiotropic anti-inflammatory agent with potential clinical utility for modulation of organ injury secondary to sepsis.