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  • Title: Terminalia Chebula Attenuates DMBA/Croton Oil-Induced Oxidative Stress and Inflammation in Swiss albino Mouse Skin.
    Author: Majed F, Nafees S, Rashid S, Ali N, Hasan SK, Ali R, Shahid A, Sultana S.
    Journal: Toxicol Int; 2015; 22(1):21-9. PubMed ID: 26862256.
    Abstract:
    OBJECTIVE: The present study was designed to investigate underlying molecular mechanism for antitumorigenic potential of Terminalia chebula (TC) against chemically-induced skin tumorigenesis in Swiss albino mice. It is used as herbal medicine because it exhibits antioxidant, anti-inflammatory, and anticarcinogenic activity. However, the précised underlying mechanism remains to be elucidated. MATERIALS AND METHODS: In light of the important role of nuclear factor-kappaB (NF-κB), cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (i-NOS), ornithine decarboxylase (ODC), proinflammatory cytokines, oxidative stress in carcinogenesis, chemopreventive efficacy of TC against 7,12-dimethylbenz[a] anthracene (DMBA), and croton oil-induced 2-stage skin carcinogenesis was studied in terms of cytoprotective antioxidant enzymes activity, lipid peroxidation (LPO), inflammatory responses, and expression of various molecular markers in skin tissues. RESULTS: We found that topical application of TC at dose of 30 mg/kg b. wt. mouse effectively suppressed oxidative stress and deregulated activation of inflammatory mediators and tumorigenesis. Histological findings further supported the protective effects of TC against DMBA/croton oil-induced cutaneous damage. CONCLUSION: The findings of the present study suggest that the chemopreventive effect of TC is associated with upregulation of endogenous cytoprotective machinery and downregulation of inflammatory mediators (interleukin (IL)-6, COX-2, i-NOS, ODC, and NF-κB).
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