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Molecular Pharmacology

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OtherAccelerated Communication

Induction of Estrogen Receptor α Expression with Decoy Oligonucleotide Targeted to NFATc1 Binding Sites in Osteoblasts

Letizia Penolazzi, Margherita Zennaro, Elisabetta Lambertini, Elisa Tavanti, Elena Torreggiani, Roberto Gambari and Roberta Piva
Molecular Pharmacology June 2007, 71 (6) 1457-1462; DOI: https://doi.org/10.1124/mol.107.034561
Letizia Penolazzi
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Margherita Zennaro
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Elisabetta Lambertini
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Elisa Tavanti
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Elena Torreggiani
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Roberto Gambari
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Roberta Piva
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Abstract

The nuclear factor of activated T cell cytoplasmic 1 (NFATc1) is a member of the NFAT family and is strictly implicated in the growth and development of bone. Most studies have focused on the effects of NFATc1 activation on osteoclastogenesis. On the contrary, the specific roles of NFAT in osteoblast differentiation are not well understood and, in some instances, reports of its role are contradictory. In the present study, we demonstrated that NFATc1 was involved in the transcriptional regulation of human estrogen receptor α (ERα) gene in SaOS-2 osteoblastic like cells. NFATc1 was specifically recruited “in vivo” at C and F distal promoters of ERα gene. In addition, it is here identified as the negative transcription factor removed by the RA4-3′decoy oligonucleotide able to induce ERα expression in osteoblasts. Ca2+/calcineurin-NFAT-mediated signaling pathways and ERα-dependent signals are involved in diverse cellular reactions by regulating gene expression under both physiological and pathological conditions. Therefore, our data might be useful for proper manipulation of NFATc1- and ERα-mediated cellular reactions in different bone disorders, such as osteoporosis.

Footnotes

  • This research was supported by grants from Ministero dell'Istruzione, dell'Università e della Ricerca Fondo per gli Investimenti della Ricerca di Base-2005, the Associazione Italiana Ricerca contro il Cancro (AIRC), and the Fondazione Cassa di Risparmio di Ferrara. E.L. is a recipient of a fellowship from the Fondazione Cassa di Risparmio di Cento.

  • Article, publication date, and citation information can be found at http://molpharm.aspetjournals.org.

  • doi:10.1124/mol.107.034561.

  • ABBREVIATIONS: NFAT, nuclear factor of activated T cells; Cn, calcineurin; OB, osteoblast; OC, osteoclast; ER, estrogen receptor; ERE, estrogen-responsive elements; ODN, oligodeoxynucleotide; PCR, polymerase chain reaction; ChIP, chromatin immunoprecipitation; PBS, phosphate-buffered saline; IP(3)K, inositol 1,4,5-trisphosphate 3-kinase; PMA, phorbol 12-myristate 13-acetate; RT-PCR, reverse transcriptase-polymerase chain reaction.

    • Received January 29, 2007.
    • Accepted March 27, 2007.
  • The American Society for Pharmacology and Experimental Therapeutics
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Molecular Pharmacology: 71 (6)
Molecular Pharmacology
Vol. 71, Issue 6
1 Jun 2007
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OtherAccelerated Communication

Induction of Estrogen Receptor α Expression with Decoy Oligonucleotide Targeted to NFATc1 Binding Sites in Osteoblasts

Letizia Penolazzi, Margherita Zennaro, Elisabetta Lambertini, Elisa Tavanti, Elena Torreggiani, Roberto Gambari and Roberta Piva
Molecular Pharmacology June 1, 2007, 71 (6) 1457-1462; DOI: https://doi.org/10.1124/mol.107.034561

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OtherAccelerated Communication

Induction of Estrogen Receptor α Expression with Decoy Oligonucleotide Targeted to NFATc1 Binding Sites in Osteoblasts

Letizia Penolazzi, Margherita Zennaro, Elisabetta Lambertini, Elisa Tavanti, Elena Torreggiani, Roberto Gambari and Roberta Piva
Molecular Pharmacology June 1, 2007, 71 (6) 1457-1462; DOI: https://doi.org/10.1124/mol.107.034561
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