The Effect of Intraperitoneal Injection of Carvacrol Administration on Lipopolysaccharides-Induced Renal Oxidative Stress in Male Rats

Carvacrol is a natural monoterpene phenol which retains significant antibacterial, antifungal, anti-cancer and anti-inflammatory activity. However, the effect of carvacrol on oxidative stress in lipopolysaccharide-induced acute kidney injury has not yet been reported. The present study aimed to investigate the protective effects of carvacrol on lipopolysaccharides-induced renal oxidative stress and inflammatory responses in male rats. Male Wistar rats (weighing 200 to 250 g, n=7 each group) were divided into the following groups: 1) control, 2) LPS, 3) LPS+carvacrol 25 mg/kg, 4) LPS+carvacrol 50 mg/kg and 5) LPS+carvacrol 100 mg/kg. For inducing acute kidney injury, 1 mg/kg LPS was injected intraperitoneally for 2 weeks. Carvacrol was administered intraperitoneally 30 minutes prior LPS injection. After preparation of renal homogenates, levels of inflammatory cytokines IL-1β and oxidative stress indexes (malondialdehyde, total thiol, catalase and Superoxide dismutase activity) were detected by ELISA and spectrophotometric methods, respectively. Our results showed that LPS injection increased malondialdehyde and IL-1β while, it reduced total thiol, catalase and SOD activity in the renal tissue. But, pretreatment with carvacrol not only decreased malondialdehyde and IL-1β levels but also increased total thiol, catalase and SOD activity. Simple regression analysis revealed that MDA was positively correlated with IL-1β level). However, there was a significant negative correlation between MDA level and total thiol, SOD and CAT activities. Our results showed that carvacrol protects the kidney by reducing IL-1β and preventing oxidative stress in the renal tissue.enal tissue.