Hu/elav RNA-binding protein HuR regulates parathyroid hormone related peptide expression in human lung adenocarcinoma cells

Simona Serini, Maurizio Martini, Gabriella Calviello, Libero Lauriola, Pierluigi Granone, Paola Lanza, Franco Oreste Ranelletti

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

2 Citazioni (Scopus)

Abstract

In 54 stage I and II human lung adenocarcinomas, HuR and PTHrP levels were positively correlated and the PTHrP-HuR status of the tumor was an independent prognostic marker of the clinical outcomes of patients. The possibility that HuR could upregulate PTHrP expression in lung adenocarcinoma was investigated by immunohistochemical, Western blot and RT-PCR analyses in HCC44 and DV90 human lung adenocarcinoma cell lines. In both cell lines, knockdown of HuR by specific siRNAs reduced PTHrP mRNAs and both cellular and secreted protein. Moreover, it inhibited cell growth and induced cell apoptosis, as revealed by the increase of caspase-3 activity. These effects were partially rescued by the addition of exogenous PTHrP (1-34). Analysis by actinomycin D assay revealed that in both cell lines HuR silencing produced a decrease of PTHrP mRNA half-life by about 70%. These findings add PTHrP to the list of lung cancer-associated genes, whose mRNA is stabilized by HuR.
Lingua originaleEnglish
pagine (da-a)1205-1216
Numero di pagine12
RivistaHistology and Histopathology
Volume2013
Stato di pubblicazionePubblicato - 2013

Keywords

  • Lung adenocarcinoma
  • PTHrP

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