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环境病理学,毒理学和肿瘤学期刊
影响因子: 1.625 5年影响因子: 1.63 SJR: 0.402 SNIP: 0.613 CiteScore™: 2.3

ISSN 打印: 0731-8898
ISSN 在线: 2162-6537

环境病理学,毒理学和肿瘤学期刊

DOI: 10.1615/JEnvironPatholToxicolOncol.v30.i3.30
pages 199-211

Antitumor Initiating Potential of Rosmarinic Acid in 7,12-Dimethylbenz(a)anthracene-Induced Hamster Buccal Pouch Carcinogenesis

Chezhiyan Anusuya
Department of Biochemistry and Biotechnology, Faculty of Science, Annamalai University, Annamalainagar, Tamil Nadu, India
Shanmugam Manoharan

ABSTRACT

Oral cancer accounts for 40%−50% of all cancers in India. Tobacco and alcohol are the major etiological factors contributing to its pathogenesis. The aim of the present study was to explore the key mechanism behind the inhibitory effects of rosmarinic acid against 7,12-dimethylbenz(a)anthracene (DMBA)-induced oral carcinogenesis by evaluating the status of biochemical markers (lipid peroxidation, antioxidants, and detoxification enzymes) and immunoexpression patterns of p53 and bcl-2 proteins. Oral tumors were developed by painting the buccal pouches of golden Syrian hamsters with 0.5% DMBA in liquid paraffin 3 times a week for 14 weeks. We noticed 100% tumor formation in hamsters treated with DMBA alone, and the tumors were histopathologically confirmed as well-differentiated squamous cell carcinoma. Oral administration of rosmarinic acid (100 mg/kg body wt) to DMBA-treated hamsters completely prevented the tumor formation. In addition, rosmarinic acid significantly returned the status of biochemical and molecular markers to near normal range in DMBA-treated hamsters. The results of the present study suggest that rosmarinic acid suppresses oral carcinogenesis by stimulating the activities of detoxification enzymes, improves the status of lipid peroxidation and antioxidants, and downregulates the expression of p53 and bcl-2 during DMBA-induced oral carcinogenesis.


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