Increased SIAH expression predicts ductal carcinoma in situ (DCIS) progression to invasive carcinoma

Kathryn C. Behling, Amy Tang, Boris Freydin, Inna Chervoneva, Sameep Kadakia, Gordon F. Schwartz, Hallgeir Rui, Agnieszka K. Witkiewicz

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Hyperactivated HER2/Neu/EGFR/RAS signaling is a major growth-promoting pathway known to drive cellular transformation and oncogenesis in breast cancers. HER2 amplification is detected in ~20% of all human breast cancer and is quite prevalent (up to 49%) in ductal carcinoma in situ (DCIS). The E3 ubiquitin ligase SIAH is considered a key downstream "gatekeeper" required for proper HER2/EGFR/RAS signal transduction. Formalin-fixed, paraffin-embedded resection specimens from 65 patients with DCIS treated with wide excision only were stained with an anti-SIAH antibody, and the percentage of tumor and normal adjacent tissue cells positive for SIAH nuclear staining were recorded. Statistical analysis was performed comparing SIAH staining in tumor cells to disease recurrence, histologic type, necrosis, hormone receptor status, and Her2/neu status, as well as nuclear grade. Correlation of SIAH expression in tumor cells with SIAH expression in normal adjacent tissue and age was also examined. Expression levels of SIAH in tumor cells was significantly higher in specimens from patients with recurrence (median = 19%) as compared to patients without recurrence (7%) (P < 0.001). There was also significantly increased SIAH expression in tumors with more aggressive features including comedo morphology (13.5% in comedo vs. 7% in other histologic types, P = 0.014). No significant association was observed between SIAH expression and estrogen receptor, progesterone receptor, and Her2/neu status. There was a significant correlation between SIAH expression in tumors and normal adjacent tissue (Spearman correlation = 0.58, P < 0.001) as well as between SIAH expression in normal adjacent tissue and patient age (Spearman correlation = -0.59, P < 0.001). No significant correlation was identified between patient age and SIAH expression in tumors (Spearman correlation = -0.23, P = 0.067). In conclusion, SIAH may represent a useful prognostic biomarker that predicts DCIS progression to invasive breast cancer.

Original languageEnglish (US)
Pages (from-to)717-724
Number of pages8
JournalBreast Cancer Research and Treatment
Volume129
Issue number3
DOIs
StatePublished - Oct 2011

Keywords

  • DCIS
  • Ductal carcinoma in situ
  • SIAH

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Fingerprint

Dive into the research topics of 'Increased SIAH expression predicts ductal carcinoma in situ (DCIS) progression to invasive carcinoma'. Together they form a unique fingerprint.

Cite this