Induction of translationally controlled tumor protein (TCTP) by transcriptional and post-transcriptional mechanisms.

Induction of translationally controlled tumor protein (TCTP) by transcriptional and post-transcriptional mechanisms. Research Abstract Details 

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Induction of translationally controlled tumor protein (TCTP) by transcriptional and post-transcriptional mechanisms. Abstract Text:

Irina Schmidt,Michael ,Benno Nafz,Angela Skalweit,Bernd-Joachim Thiele,Irina Schmidt,Michael ,Benno Nafz,Angela Skalweit,Bernd-Joachim Thiele,

Expression of the human TPT1 gene coding for translationally controlled tumor protein (TCTP) was investigated in Calu-6 and Cos-7 cells under the influence of 4beta-phorbol 12-myristate 13-acetate (PMA), forskolin, dioxin and the heavy metals copper, nickel and cobalt. Transcriptional and post-transcriptional aspects of the mechanism were analyzed by TCTP mRNA/protein quantification, luciferase reporter gene assays depending on TPT1 promoter sequences or TCTP mRNA 5'/3'-UTRs and investigation of the interaction of RNA-binding proteins with UTRs by UV-crosslinking. PMA, forskolin, dioxin, cobalt and nickel induced TCTP expression in 24 h in both cell lines about 2.2-3.2-fold at the mRNA level and 1.6-2.2-fold at the protein level. The highest induction rate, 4.5-5.0-fold at the mRNA level and 3.5-4.0-fold at the protein level, was observed with copper. TPT1 promoter assays showed transcriptional activation by PMA, forskolin and dioxin (2.0-3.1-fold) and a 7.0-8.0-fold increase by copper, whereas cobalt and nickel had no effect. Deletion analysis revealed that copper-dependent transcriptional control was transmitted by a metal-responsive element residing in the TPT1 promoter. Post-transcriptional activation of TCTP expression was associated with the action of dioxin, nickel, cobalt (1.8-2.3-fold) and copper (2.5-3.0-fold), whereas stimulation of TCTP synthesis by copper was mediated by the TCTP mRNA 3'-UTR (3.2-fold) but not by the 5'-UTR (0.5-fold). mRNA stabilization was found to mediate these effects of cobalt and nickel. Post-transcriptional regulation was associated with qualitative and quantitative changes in the binding of specific RNA-binding proteins to UTRs.

Induction of translationally controlled tumor protein (TCTP) by transcriptional and post-transcriptional mechanisms. Publishing Authors By Initials

I Schmidt,M ,B Nafz,A Skalweit,BJ Thiele,I Schmidt,M ,B Nafz,A Skalweit,BJ Thiele,

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Induction of translationally controlled tumor protein (TCTP) by transcriptional and post-transcriptional mechanisms. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: The FEBS journal

VOLUME: 274

Page Numbers: 5416-24

Journal Abbreviation: FEBS J.

ISSN: 1742-464X

DAY: 26

MONTH: 09

YEAR: 2007

Induction of translationally controlled tumor protein (TCTP) by transcriptional and post-transcriptional mechanisms. Information

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LANGUAGE: eng

NlmUniqueID: 101229646

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AFFILIATION: Charité, Universitätsmedizin Berlin, Institut für Vegetative Physiologie, Germany.

Country: England

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MEDLINETA: FEBS J

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