MAPK and JNK transduction pathways can phosphorylate Sp1 to activate the uPA minimal promoter element and endogenous gene transcription

Two upstream regions of the human urokinase (uPA) gene regulate its transcription: the minimal promoter (MP) and the enhancer element. The activity of the minimal promoter is essential for basal uPA transcription in prostate adenocarcinoma PC3 cells. Binding of a phosphorylated Sp1 transcription fac...

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Veröffentlicht in:Blood 2004-07, Vol.104 (1), p.256-262
Hauptverfasser: Benasciutti, Elisa, Pagès, Gilles, Kenzior, Olga, Folk, William, Blasi, Francesco, Crippa, Massimo P.
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container_end_page 262
container_issue 1
container_start_page 256
container_title Blood
container_volume 104
creator Benasciutti, Elisa
Pagès, Gilles
Kenzior, Olga
Folk, William
Blasi, Francesco
Crippa, Massimo P.
description Two upstream regions of the human urokinase (uPA) gene regulate its transcription: the minimal promoter (MP) and the enhancer element. The activity of the minimal promoter is essential for basal uPA transcription in prostate adenocarcinoma PC3 cells. Binding of a phosphorylated Sp1 transcription factor is, in turn, essential for the activity of the MP. Here we report that the Jun kinase (JNK) pathway is required for the basal activity of the MP and for the expression of the endogenous uPA gene in PC3 cells and for activated transcription in LNCaP cells. On the other hand, the p42/p44 mitogen-activated protein kinase (MAPK) pathway activates uPA gene expression through Sp1 phosphorylation in HeLa, LNCaP, and CCL39-derivative cells that do not typically express uPA in basal conditions. In HeLa cells the dominant-negative form of JNK interferes with the p42/p44 MAPK activation of the uPA-MP. The results suggest that the stress-activated protein kinase (SAPK)/JNK pathway plays an important role in the phosphorylation of Sp1, which, in turn, leads to basal or activated transcription from the uPA-MP element.
doi_str_mv 10.1182/blood-2003-08-2661
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source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection
subjects Animals
Biochemistry, Molecular Biology
Biological and medical sciences
Butadienes
Butadienes - pharmacology
Cancer
Cell Line, Tumor
Cricetinae
Cricetulus
Dose-Response Relationship, Drug
Enzyme Activation
Enzyme Activation - genetics
Enzyme Inhibitors
Enzyme Inhibitors - pharmacology
Fibroblasts
Fibroblasts - cytology
Fibroblasts - metabolism
General aspects (metabolism, cell proliferation, established cell line...)
Genes, Reporter
Genes, Reporter - genetics
HeLa Cells
Humans
JNK Mitogen-Activated Protein Kinases
Life Sciences
MAP Kinase Signaling System
Medical sciences
Mitogen-Activated Protein Kinase 1
Mitogen-Activated Protein Kinase 1 - antagonists & inhibitors
Mitogen-Activated Protein Kinase 1 - genetics
Mitogen-Activated Protein Kinase 1 - metabolism
Mitogen-Activated Protein Kinase 1 - pharmacology
Mitogen-Activated Protein Kinase 3
Mitogen-Activated Protein Kinases
Mitogen-Activated Protein Kinases - antagonists & inhibitors
Mitogen-Activated Protein Kinases - genetics
Mitogen-Activated Protein Kinases - metabolism
Mitogen-Activated Protein Kinases - pharmacology
Molecular biology
Nitriles
Nitriles - pharmacology
Phosphorylation
Promoter Regions (Genetics)
Promoter Regions, Genetic - genetics
Recombinant Proteins
Recombinant Proteins - genetics
Recombinant Proteins - metabolism
RNA, Messenger
RNA, Messenger - biosynthesis
Sp1 Transcription Factor
Sp1 Transcription Factor - metabolism
Trans-Activation (Genetics)
Transcriptional Activation - drug effects
Tumor cell
Tumors
Urinary Plasminogen Activator
Urokinase-Type Plasminogen Activator - biosynthesis
Urokinase-Type Plasminogen Activator - genetics
title MAPK and JNK transduction pathways can phosphorylate Sp1 to activate the uPA minimal promoter element and endogenous gene transcription
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