| Differential sensitivity and responsiveness of three human cell lines HepG2, 1321N1 and HEK 293 to cadmium. | |
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MedLine Citation:
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PMID: 20686333 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Cadmium (Cd) is a toxic heavy metal with no uniform mechanism of toxicity. In this the present study, the toxic effect of 5, 10 and 50 microM of Cd chloride was compared in three human cell lines; a human hepatoma cell line HepG2, a human astrocytoma cell line 1321N1, and a human embryonic kidney cell HEK 293. The results indicate a decrease in the viability of all three cell lines following exposure to Cd with HepG2 cells (IC50=13.96 microM) showing the most sensitivity when measured using the MTT assay. There was significant increase in lactate dehydrogenase leakage, DNA damage, malondialdeyde and antioxidant enzymes activities in all three cell lines especially at 50 microM Cd. Significant decreases in ATP production were also observed at all Cd concentrations in HepG2 and HEK 293 cell lines. ROS levels significantly increase and GSH/GSSG ratio significantly decrease in all the three cell lines after Cd exposure, but these effects were attenuated by the presence of N-acetylcysteine (NAC). The present study therefore shows that ROS production and glutathione (GSH) depletion may play a role in Cd-induced toxicity in all the three cell lines. The endogenous levels of protective enzymes as well as their responsiveness are likely to determine a cell's susceptibility to Cd. |
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Authors:
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Akeem Olalekan Lawal; Elizabeth Ellis |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of toxicological sciences Volume: 35 ISSN: 1880-3989 ISO Abbreviation: J Toxicol Sci Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-05 Completed Date: 2011-02-09 Revised Date: 2011-07-21 |
Medline Journal Info:
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Nlm Unique ID: 7805798 Medline TA: J Toxicol Sci Country: Japan |
Other Details:
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Languages: eng Pagination: 465-78 Citation Subset: IM |
Affiliation:
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Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow, UK. akeem.lawal@strath.ac.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acetylcysteine
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pharmacology Cadmium Chloride / toxicity* Cell Line, Tumor Cell Survival / drug effects Glutathione / pharmacology HEK293 Cells Hep G2 Cells Humans Reactive Oxygen Species / pharmacology |
| Chemical | |
Reg. No./Substance:
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0/Reactive Oxygen Species; 10108-64-2/Cadmium Chloride; 616-91-1/Acetylcysteine; 70-18-8/Glutathione |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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