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  • Title: Anti-inflammatory activities of cucurbitacin E isolated from Citrullus lanatus var. citroides: role of reactive nitrogen species and cyclooxygenase enzyme inhibition.
    Author: Abdelwahab SI, Hassan LE, Sirat HM, Yagi SM, Koko WS, Mohan S, Taha MM, Ahmad S, Chuen CS, Narrima P, Rais MM, Hadi AH.
    Journal: Fitoterapia; 2011 Dec; 82(8):1190-7. PubMed ID: 21871542.
    Abstract:
    The in vivo and in vitro mechanistic anti-inflammatory actions of cucurbitacin E (CE) (Citrullus lanatus var. citroides) were examined. The results showed that LPS/INF-γ increased NO production in RAW264.7 macrophages, whereas L-NAME and CE curtailed it. CE did not reveal any cytotoxicity on RAW264.7 and WRL-68 cells. CE inhibited both COX enzymes with more selectivity toward COX-2. Intraperitoneal injection of CE significantly suppressed carrageenan-induced rat's paw edema. ORAC and FRAP assays showed that CE is not a potent ROS scavenger. It could be concluded that CE is potentially useful in treating inflammation through the inhibition of COX and RNS but not ROS.
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