THE PROTECTIVE ROLE OF CURCUMIN IN ZYMOSAN-INDUCED MULTIPLE ORGAN DYSFUNCTION SYNDROME IN MICE.

AIM: Multiple Organ Dysfunction Syndrome (MODS) is characterized as progressive and uncontrolled inflammatory response which involves activation of inflammatory cascades, cytokines release, and endothelial dysfunction, leading to deterioration of several organ functions. Curcumin is a natural polyphenol related to the yellow color of turmeric and has been reported to exert an anti-inflammatory, anti-oxidative, and anti-tumor effect. We conducted the study to investigate the effects of curcumin in non-septic MODS caused by zymosan in mice model. METHOD: The mice were randomly allocated into five groups (six mice per group): control group (treated with physiological saline, 0.1 mL daily for 3 days before and 1 h after physiological saline treatment), DMSO group (treated with DMSO, 0.1 mL daily for 3 days before and 1 h after physiological saline treatment), Curcumin group (200 mg/kg, suspended in DMSO, in a final volume of 0.1 mL, used for 3 days daily before and 1 h after physiological saline treatment), Zymosan+DMSO group (treated with DMSO, 0.1 mL daily for 3 days before and 1 h after zymosan treatment) and Zymosan+ Curcumin group (treated with curcumin, suspended in DMSO at a dose of 0.1 mL daily for 3 days before and 1 h after zymosan treatment).Mice in groups were sacrificed, and then the blood and tissues were collected to evaluate the severity of acute peritonitis, tissue histopathological changes, NO formation, oxidative stress, PMN infiltration, cytokines production, organ function, and NF-κB activation 18 h after when zymosan or physiological saline was injected. In another set of experiments, the mice were also grouped (20 mice per group) for monitoring the loss of body weight and mortality for 7 days after zymosan or physiological saline administration. RESULTS: Curcumin induces a significant reduction of the volume exudate and the neutrophil infiltration. It also could exhibit an outstanding protective effect against histopathological injury by decreasing the NO formation, oxidative stress, cytokines production, and infiltration of inflammatory cells. The organ function is also improved by administration of curcumin. Moreover, the activation of NF-κB is attenuated by curcumin in the MODS mice model, suggesting that curcumin attenuated the zymosan-induced MODS via inhibiting the expression of NF-κB possibly. In addition, curcumin-treated mice were shown to alleviate the severity of MODS characterized by a minor systemic toxicity, less body weight loss, and lower mortality caused by zymosan administration. CONCLUSION: Curcumin attenuates zymosan-induced MODS.

Hydrogen water alleviates lung injury induced by one-lung ventilation.

BACKGROUND: With the development of thoracic surgeries, one-lung ventilation (OLV) has been routinely used to facilitate surgical exposure. However, OLV can cause lung injury during the surgical process and becomes an important factor affecting the outcomes. To date, effective treatments for the prevention of lung injury caused by OLV are lacking. Hydrogen has been demonstrated to have effective protection against tissue injuries caused by oxidative stress, inflammation, and apoptosis. This study investigated the efficacy of hydrogen water consumption on the prevention of lung injury induced by OLV in rats. MATERIALS AND METHODS: Male Sprague-Dawley rats (n = 32, 240-260 g) were divided randomly into the following four groups: sham group, sham + H2 group, OLV group, OLV + H2 group. The rats drank hydrogen water or degassed hydrogen water for 4 wk before the operation and received OLV for 60 min and two-lung ventilation for 60 min. Lung tissues were assayed for wet-to-dry ratio, oxidative stress variables, proinflammatory cytokines, and hematoxylin-eosin staining. RESULTS: Hydrogen water consumption reduced wet-to-dry weight ratio, malondialdehyde and myeloperoxidase activity and decreased the concentration of TNF-α, IL-1ß, and IL-6 in the lung tissues compared with sham group and sham + H2 group. Hydrogen water consumption further attenuated NF-κB activation and caused histopathologic alterations. CONCLUSIONS: Our data demonstrated that hydrogen water consumption ameliorated OLV-induced lung injury, and it may exert its protective role by its anti-inflammation, antioxidation and reducing NF-κB activity in the lung tissues.