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Published in: Medical Oncology 4/2011

01-12-2011 | Original Paper

Inhibition of 4-NQO-induced F433 rat tongue carcinogenesis by oleuropein-rich extract

Authors: Mohammed E. Grawish, Manal M. Zyada, Ahmed R. Zaher

Published in: Medical Oncology | Issue 4/2011

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Abstract

Olive leaf extract provides nutritional support for detoxification at the cellular level, when the body is under stress. The present study aimed to evaluate the chemopreventive effect of oleuropein-rich extract (ORE) on 4-NQO-induced rat tongue carcinogenesis. Eighty male F344 rats, 6 weeks age were divided into 5 groups (10 animals each for groups 1 and 2 and 20 each for groups 3, 4, and 5). Group 1 served as an untreated control. Group 2 was given ORE-containing diet alone. Rats of groups 3, 4, and 5 were given daily 20 ppm 4-NQO in drinking water for 8 weeks. Group 4 was fed diets containing ORE, concomitantly with the time of carcinogen exposure and continued 1 week after its stoppage. Group 5 was fed diets mixed with ORE starting 1 week after cessation of 4-NQO treatment. The experiment was terminated when the rats aged 37 weeks, and all animals were euthanized. The tongues were carefully inspected for pathological lesions, excised, and were processed for c-Met and Ki-67 immunohistochemical examination. The gross inspection, histopathological and immunohistochemical results of the present study showed a beneficial regression effect of ORE on tumor progression, especially when it was administered concomitantly with 4-NQO rather than when given after the stoppage of the carcinogenic material. In conclusion, ORE has a chemopreventive role in tongue squamous cell carcinoma, and further studies are needed to explore the molecular mechanisms of its tumor suppressive effect at this level.
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Metadata
Title
Inhibition of 4-NQO-induced F433 rat tongue carcinogenesis by oleuropein-rich extract
Authors
Mohammed E. Grawish
Manal M. Zyada
Ahmed R. Zaher
Publication date
01-12-2011
Publisher
Springer US
Published in
Medical Oncology / Issue 4/2011
Print ISSN: 1357-0560
Electronic ISSN: 1559-131X
DOI
https://doi.org/10.1007/s12032-010-9612-2

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