Nuclear myc promoter-binding protein-1 (MBP-1) expression is a prognostic factor in invasive ductal breast carcinoma (Contributo in atti di convegno)

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  • Nuclear myc promoter-binding protein-1 (MBP-1) expression is a prognostic factor in invasive ductal breast carcinoma (Contributo in atti di convegno) (literal)
Anno
  • 2010-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1111/j.1742-4658.2010.07680.x (literal)
Alternative label
  • CLaudia Mazzarella; Arianna Ferro; Mariavera Lo Presti, M; Flavia Contino; Silvia Sbacchi; Elena Roz; Carmelo Lupo; Giovanni Perconti; Agata Giallongo; Salvatore Feo (2010)
    Nuclear myc promoter-binding protein-1 (MBP-1) expression is a prognostic factor in invasive ductal breast carcinoma
    in 35th FEBS Congress, Gothenburg, Sweden, 26 June - 1 July 2010
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • CLaudia Mazzarella; Arianna Ferro; Mariavera Lo Presti, M; Flavia Contino; Silvia Sbacchi; Elena Roz; Carmelo Lupo; Giovanni Perconti; Agata Giallongo; Salvatore Feo (literal)
Pagina inizio
  • 165 (literal)
Pagina fine
  • 165 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://onlinelibrary.wiley.com/doi/10.1111/ejb.2010.277.issue-s1/issuetoc (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 277 (literal)
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Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 1 (literal)
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  • S1 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Univ. Palermo, Dipartimento Oncol Sperimentale Applicazioni Clininiche, Palermo, Italy La Maddalena, U.O. Anatomia Patologica, Palermo, Italy Istituto Biomedicina e Immunologia Molecolare, CNR, Palermo, Italy (literal)
Titolo
  • Nuclear myc promoter-binding protein-1 (MBP-1) expression is a prognostic factor in invasive ductal breast carcinoma (literal)
Abstract
  • Myc Promoter-Binding Protein-1 (MBP-1) is a transcriptional repressor, generated by alternative translation of the a-enolase mRNA, that negatively regulates c-Myc gene expression (1) and plays a suppressive role on tumorogenesis (2, 3). We analyzed aenolase and MBP-1 expression and localization in normal breast epithelium and primary infiltrating ductal breast carcinoma (IDC) from 177 patients by Western blotting and immunohistochemical analyses, using specific anti-a-enolase mAbs. A significantly increase in a-enolase expression was observed in 98% of the analysed tumors, compared to normal tissues. Nuclear MBP- 1 has been found in almost all normal tissues while its expression is retained in only 35% of the matched tumours. Statistically significant inverse correlation was observed between expression and nuclear localization of MBP-1 and ErbB2 and Ki-67 expression, node positivity and tumor grade. Furthermore, nuclear MBP-1 is associated with good disease-free survival of patients with primary IDC. Transfection experiments in human breast SKBr3 cells (ErbB2+) demonstrated that MBP-1 ectopic expression results in down regulation of ErbB2 expression, and led us to identify the ErbB2 promoter region involved in the binding, indicating that, like c-Myc gene, ErbB2 is a direct target of MBP-1 transcriptional repression fuctions in breast cancer. Owing to the prognostic influence of nuclear-MBP-1 expression in a subgroup of small tumors and among patients with node-negative and ErbB2- cancers, where the need for prognostication is the greatest, MBP-1 nuclear expression may prove to be a clinically valuable prognostic variable for breast cancer patients. (literal)
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