Preventive effects of tomato pulp on oral pre-neoplastic changes in-duced by 4-Nitroquinoline-1-oxid in the rat
Background: Squamous cell carcinoma (SCC) is the most frequent oral cancer. Protec-tive effects of the consumption of vegetables and fruits on various forms of cancer in-cluding oral cancer have been determined. Tomato (Solanum lycopersicum L.) because of its lycopene and bioflavonoids contents poss...
| Main Authors: | , , |
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| Format: | Article |
| Language: | fas |
| Published: |
Tehran University of Medical Sciences
2014-08-01
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| Series: | Tehran University Medical Journal |
| Subjects: | |
| Online Access: | http://tumj.tums.ac.ir/browse.php?a_code=A-10-25-5233&slc_lang=en&sid=1 |
| Summary: | Background: Squamous cell carcinoma (SCC) is the most frequent oral cancer. Protec-tive effects of the consumption of vegetables and fruits on various forms of cancer in-cluding oral cancer have been determined. Tomato (Solanum lycopersicum L.) because of its lycopene and bioflavonoids contents possesses anti-carcinogenic properties. The aim of this study was to evaluate the preventive effects of tomato pulp on pre-neoplastic changes induced by 4-Nitroquinoline-1-oxid (4-NQO) in epithelial cells of lingual mucosa in the rats.
Methods: Forty-eight male Wistar rats were randomly allocated into four equal groups. Group 1 served as control. Groups 2 to 4 assigned to receive 30 ppm 4-NQO in drinking water for 12 consecutive weeks. When the feeding of 4-NQO was started to the rats of groups 3 and 4, they received tomato pulp (20 and 40 ml/kg bw) daily through the oral gavage. Finally, histological evaluations for carcinogenesis were performed for tongues epithelial tissue.
Results: There were no pathological alterations in epithelial tissue of lingual mucosa in control rats. In the epithelial cells of lingual mucosa of 4-NQO treated rats, premalig-nant alterations appeared after 12 weeks of the last application of the drug. Administration of tomato pulp at both doses (20 and 40 ml/kg bw) during the experiment reduced the severity of the lesions, as well as caused a significant reduction in the frequency of pre-neoplastic lesions of tongue epithelial cells (P= 0.024 and P= 0.008). The incidence of severe epithelial cells dysplasia of lingual mucosa in the high dose treatment group was significantly smaller than of low dose treatment group (P= 0.037).
Conclusion: The results obtained showed that tomato pulp is effective in inhibiting the development of neoplasms in epithelial cells of lingual mucosa induced by 4-NQO in the rat.
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| ISSN: | 1683-1764 1735-7322 |