TAF4b and Jun/Activating Protein-1 Collaborate to Regulate the Expression of Integrin alpha 6 and Cancer Cell Migration Properties

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TAF4b and Jun/Activating Protein-1 Collaborate to Regulate the Expression of Integrin alpha 6 and Cancer Cell Migration Properties

Voulgari, Angeliki
Tora, Laszlo
Kalogeropoulou, Margarita
Πίντζας, Αλέξανδρος
Sandaltzopoulos, Raphael
Davidson, Irwin
Kostourou, Vassiliki
Dikstein, Rivka

Άρθρο σε επιστημονικό περιοδικό

2010-04


The TAF4b subunit of the transcription factor IID, which has a central role in transcription by polymerase II, is involved in promoter recognition by selective recruitment of activators. The activating protein-1 (AP-1) family members participate in oncogenic transformation via gene regulation. Utilizing immunoprecipitation of endogenous protein complexes, we documented specific interactions between Jun family members and TATA box binding protein-associated factors (TAF) in colon HT29 adenocarcinoma cells. Particularly, TAF4b and c-Jun were found to colocalize and interact in the nucleus of advanced carcinoma cells and in cells with epithelial-to-mesenchymal transition (EMT) characteristics. TAF4b was found to specifically regulate the AP-1 target gene involved in EMT integrin alpha 6, thus altering related cellular properties such as migration potential. Using a chromatin immunoprecipitation approach in colon adenocarcinoma cell lines, we further identified a synergistic role for TAF4b and c-Jun and other AP-1 family members on the promoter of integrin alpha 6, underlining the existence of a specific mechanism related to gene expression control. We show evidence for the first time of an interdependence of TAF4b and AP-1 family members in cell type-specific promoter recognition and initiation of transcription in the context of cancer progression and EMT.
Philadelphia

Βιολογία (Γενικά) (EL)
Νεοπλάσματα. Όγκοι. Ογκολογία (περ. Καρκίνος, κακινογόνες ουσίες) (EL)
Biology (General) (EN)
Neoplasms. Tumors. Oncology (Incl.cancer, carcinogens) (EN)

Αγγλική γλώσσα

American Association Cancer Research


Molecular Cancer Research

© 2010 AACR.
© 2010 AACR. (EN)




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