The insulin receptor substrate 1 (irs1) in intestinal epithelial differentiation and in colorectal cancer

Diana L. Esposito, Federica Aru, Rossano Lattanzio, Annalisa Morgano, Michela Abbondanza, Reza Malekzadeh, Faraz Bishehsari, Rosa Valanzano, Antonio Russo, Mauro Piantelli, Antonio Moschetta, Lavinia Vittoria Lotti, Renato Mariani-Costantini

Research output: Contribution to journalArticlepeer-review

Abstract

Colorectal cancer (CRC) is associated with lifestyle factors that affect insulin/IGF signaling, of which the insulin receptor substrate 1 (IRS1) is a key transducer. We investigated expression, localization and pathologic correlations of IRS1 in cancer-uninvolved colonic epithelium, primary CRCs with paired liver metastases and in vitro polarizing Caco2 and HT29 cells. IRS1 mRNA and protein resulted higher, relative to paired mucosa, in adenomas of familial adenomatous polyposis patients and in CRCs that overexpressed c-MYC, ß-catenin, InsRß, and IGF1R. Analysis of IRS1 immunostaining in 24 cases of primary CRC with paired colonic epithelium and hepatic metastasis showed that staining intensity was significantly higher in metastases relative to both primary CRC (P

Original languageEnglish
Article numbere36190
JournalPLoS One
Volume7
Issue number4
DOIs
Publication statusPublished - Apr 27 2012

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Medicine(all)

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