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Vanadium inhibits placental glutathione S‐transferase (GST‐P) positive foci in 1,2‐dimethyl hydrazine induced rat colon carcinogenesis
Author(s) -
Kanna P. Suresh,
Mahendrakumar C. B.,
Chatterjee M.,
Hemalatha P.,
Datta Subroto,
Chakraborty Prabir
Publication year - 2003
Publication title -
journal of biochemical and molecular toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.526
H-Index - 58
eISSN - 1099-0461
pISSN - 1095-6670
DOI - 10.1002/jbt.10099
Subject(s) - carcinogenesis , glutathione , chemistry , vanadium , hydrazine (antidepressant) , glutathione s transferase , transferase , microbiology and biotechnology , biochemistry , endocrinology , medicine , biology , enzyme , inorganic chemistry , gene
Vanadium (V) has recently been found to possess potent anti‐neoplastic activity in rat colon carcinogenesis. In the present study attempts have been made to investigate the expression of the number and area of aberrant crypt foci positive for placental glutathione S‐transferase (GST‐P) during 1,2‐dimethyl hydrazine (DMH)‐induced rat colon carcinogenesis. Male Sprague Dawley rats were randomly divided into four groups. Rats in group A were designed as normal controls. Group B animals received DMH once a week (20 mg/kg body wt.) intraperitoneally for 16 weeks. Group C rats received the same treatment of DMH as in group B, along with 0.5‐ppm vanadium as ammonium monovanadate ad libitum in drinking water throughout the experiment. Vanadium alone was given to Group D rats without any DMH injection. The expression of the number and the area of aberrant crypt foci (ACF) positive for GST‐P was maximum in DMH‐treated group. Vanadium‐treated rats significantly reduced ( P < 0.001) the expression of GST‐P positive ACF cells (by 71.13%) for the entire period of the study. Moreover the histopathological examination also showed that vanadium action could minimize the aberrant crypt foci ( P < 0.001). Furthermore, vanadium supplementation also elevated SOD activities in both liver and colon ( P < 0.01, P < 0.02 and P < 0.01, P < 0.02 respectively) when compared to their carcinogen counterparts. Our results confirm that vanadium is particularly effective in limiting the action of the carcinogen, thereby establishing its anticarcinogenicity in chemically induced rat colon carcinogenesis. © 2003 Wiley Periodicals, Inc. J Biochem Mol Toxicol 17:357–365, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/jbt.10099