Document Detail


Cytotoxic effect of tobacco extracts on human oral squamous cell carcinoma cell-line.
MedLine Citation:
PMID:  20971678     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Cancer is a public health problem worldwide. Incidences of oral carcinomas are increasing in the last decades, and the developed countries are the most affected. Current therapeutic options for this type of cancer are aggressive and/or invasive, including surgery, radiotherapy and chemotherapy. In addition, they have not yet translated into an improvement of life quality or expectancy to patients. In this scenario, new therapeutics are urgently needed and actively sought after. The goal of this study was to investigate the cytotoxic effects of tobacco crude extract (TCE) and two fractions thereof in the human lineage of oral squamous cell carcinoma, OSCC-3. Exposure of human oral cancer cells to TCE-induced cell death and decreased cell viability in a dose-dependent manner. Of the fractions tested, one was able to induce significant cell death (over 50%) after 48 h treatment. DNA fragmentation and caspase-3 activation indicated that the type of cell death induced by TCE and its fraction was apoptosis. Our results indicate that tobacco contains compounds that could be useful in inducing apoptosis in cancer cells. More specifically, because of the neutral chemical nature of the fraction capable of inducing apoptosis, we postulate that the putative compound responsible for the cell death is non-polar. Further investigation is needed to uncover its chemical nature and structure.
Authors:
Silvia T Elias; Julia Diniz; Rubens S S Almeida; Nelson Alvarenga; Luiz A Simeoni; Dâmaris Silveira; Esteban Ferro; Eliete N Silva Guerra; Andréa B Motoyama
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-10-23
Journal Detail:
Title:  Oral oncology     Volume:  46     ISSN:  1368-8375     ISO Abbreviation:  Oral Oncol.     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2010-11-24     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9709118     Medline TA:  Oral Oncol     Country:  England    
Other Details:
Languages:  eng     Pagination:  869-73     Citation Subset:  IM    
Copyright Information:
Copyright © 2010. Published by Elsevier Ltd.
Affiliation:
Faculty of Health Sciences, University of Brasilia, Brazil.
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