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

Abstract

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.

Pharmacological Effects of Marine-Derived Enterococcus faecium EA9 against Acute Lung Injury and Inflammation in Cecal Ligated and Punctured Septic Rats

“…Moreover, the CLP model caused a significant pulmonary edema as indicated by the increased wet/dry ratio. Previous studies also documented comparable pulmonary edema using the same animal model [ 19 , 24 ].…”

“…Moreover, the CLP model caused a significant pulmonary edema as indicated by the increased wet/dry ratio. Previous studies also documented comparable pulmonary edema using the same animal model [19,24]. Reactive oxygen metabolites are considered crucial caustic mediators in the pathogenesis of lung injuries during sepsis [25].…”

“…Animals were randomly allocated into four groups as follows: (a) sham animals with no CLP or probiotic treatment (Sham), (b) sham animals with probiotic treatment (Sham+ E. faecium ), (c) CLP animals with no probiotic treatment (CLP), and (d) CLP animals with probiotic treatment (CLP+ E. faecium ). The surgical procedure of the CLP model of sepsis was conducted according to Zubrow et al [ 19 ]. In brief, animals were generally anesthetized using a single intraperitoneal injection of ketamine (EIPICO, 10 th of Ramadan city, Egypt) and xylazine (Adwia, 10 th of Ramadan city, Egypt) mixture (60 and 5 mg/kg, respectively).…”

“…faecium). The surgical procedure of the CLP model of sepsis was conducted according to Zubrow et al [19]. In brief, animals were generally anesthetized using a single intraperitoneal injection of ketamine (EIPICO, 10 th of Ramadan city, Egypt) and xylazine (Adwia, 10 th of Ramadan city, Egypt) mixture (60 and 5 mg/kg, respectively).…”

Matairesinol exerts anti-inflammatory and antioxidant effects in sepsis-mediated brain injury by repressing the MAPK and NF-κB pathways through up-regulating AMPK

“…Schisandrin B attenuates LPS-induced sepsis in mice by down-regulating TLR4 via miR-17-5p [ 31 ]. Nordihydroguaiaretic acid curbs sepsis-induced lung injury in rats [ 32 ]. Mat is one of the natural lignans found in plants and has anti-inflammatory and antioxidant activities [ 33 – 34 ].…”