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Construction and Activity Assay of the Activating Transcription Factor 3 Reporter Vector pATF/CRE-luc

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Activating transcription factor 3 (ATF3), a member of the activating transcription factor/cAMP responsive element binding protein (ATF/CREB) family of transcription factors, is induced by many physiological stresses. To investigate the activity of ATF/CREB in cells with physiological stresses, we developed a practical reporter vector, the plasmid pATF/CRE-luc, bearing activating transcription factor/cAMP responsive element (ATF/CRE) binding sites. This plasmid was constructed by inserting three repeats of the ATF/CRE binding element into the plasmid pG5luc, replacing the GAL-4 binding sites. The plasmids pACT/ATF3 and pATF/CRE-luc were transfected into HeLa and NIH3T3 cells, respectively, and the results showed that the expression of luciferase was increased in a dose-dependent manner on plasmid pACT/ATF3. The data suggested that the plasmid pATF/CRE-luc could be used as a sensitive and convenient reporter system of ATF3 activity.

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Xiang-Fu WU
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Keywords: ATF/CRE; luciferase gene; pG5luc; reporter system

Document Type: Research Article

Affiliations: 1: Department of Nuclear Medicine, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, China 2: Department of Biochemistry and Molecular Biology, Fourth Military Medical University, Xi'an 710032, China

Publication date: January 1, 2006

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