Document Detail


Enhancing the response of CALUX and CAFLUX cell bioassays for quantitative detection of dioxin-like compounds.
MedLine Citation:
PMID:  21394221     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Reporter genes produce a protein product in transfected cells that can be easily measured in intact or lysed cells and they have been extensively used in numerous basic and applied research applications. Over the past 10 years, reporter gene assays have been widely accepted and used for analysis of 2,3,7,8-tetrachlorodibenzo-p-dioxin and related dioxin-like compounds in various types of matrices, such as biological, environmental, food and feed samples, given that high-resolution instrumental analysis techniques are impractical for large-scale screening analysis. The most sensitive cell-based reporter gene bioassay systems developed are the mechanism-based CALUX (Chemically Activated Luciferase Expression) and CAFLUX (Chemically Activated Fluorescent Expression) bioassays, which utilize recombinant cell lines containing stably transfected dioxin (AhR)-responsive firefly luciferase or enhanced green fluorescent protein (EGFP) reporter genes, respectively. While the current CALUX and CAFLUX bioassays are very sensitive, increasing their lower limit of sensitivity, magnitude of response and dynamic range for chemical detection would significantly increase their utility, particularly for those samples that contain low levels of dioxin-like HAHs (i.e., serum). In this study, we report that the addition of modulators of cell signaling pathways or modification of cell culture conditions results in significant improvement in the magnitude and overall responsiveness of the existing CALUX and CAFLUX cell bioassays.
Authors:
Bin Zhao; David S Baston; Elaine Khan; Claudio Sorrentino; Michael S Denison
Publication Detail:
Type:  JOURNAL ARTICLE    
Journal Detail:
Title:  Science China. Chemistry     Volume:  53     ISSN:  1862-2771     ISO Abbreviation:  -     Publication Date:  2010 May 
Date Detail:
Created Date:  2011-3-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101532738     Medline TA:  Sci China Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  1010-1016     Citation Subset:  -    
Affiliation:
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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Descriptor/Qualifier:
Grant Support
ID/Acronym/Agency:
P42 ES004699-23//NIEHS NIH HHS

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