Evaluation of chemopreventive effects of Thymoquinone on cell surface glycoconjugates and cytokeratin expression during DMBA induced hamster buccal pouch carcinogenesis

  • Rajkamal, G. (Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University) ;
  • Suresh, K. (Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University) ;
  • Sugunadevi, G. (Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University) ;
  • Vijayaanand, M.A. (Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University) ;
  • Rajalingam, K. (Department of Biochemistry & Biotechnology, Faculty of Science, Annamalai University)
  • Received : 2010.03.03
  • Accepted : 2010.05.12
  • Published : 2010.10.31


The present study aimed to investigate the membrane stabilizing effect of Thymoquinone (TQ) on cell surface glycoconjugates and cytokeratin expression against DMBA induced hamster buccal pouch carcinogenesis. 0.5% DMBA painting (three times per week) in hamster buccal pouches for 14 weeks resulted in the formation of well developed oral squamous cell carcinoma. We observed 100% tumor formation with marked abnormalities of glycoconjugates status in tumor bearing hamsters as compared to control animals. Oral administration of TQ at a dose of 30 mg/kg body weight, to DMBA painted hamsters on alternate days for 14 weeks, reduced the tumor formation as well as protected the levels of cell surface glycoconjugates in DMBA painted hamsters. The present study thus suggests that TQ has potent chemopreventive efficacy as well as protected the abnormalities on cell surface glycoconjugates during DMBA induced hamster buccal pouch carcinogenesis.


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