Surgical procedures and postsurgical tissue processing significantly affect expression of genes and EGFR-pathway proteins in colorectal cancer tissue

Kerstin A. David, Florian T. Unger, Philipp Uhlig, Hartmut Juhl, Helen M. Moore, Carolyn Compton, Björn Nashan, Arnulf Dörner, Andreas de Weerth, Carsten Zornig

Research output: Contribution to journalArticle

Abstract

An understanding of tissue data variability in relation to processing techniques during and postsurgery would be desirable when testing surgical specimens for clinical diagnostics, drug development, or identification of predictive biomarkers. Specimens of normal and colorectal cancer (CRC) tissues removed during colon and liver resection surgery were obtained at the beginning of surgery and postsurgically, tissue was fixed at 10, 20, and 45 minutes. Specimens were analyzed from 50 patients with primary CRC and 43 with intrahepatic metastasis of CRC using a whole genome gene expression array. Additionally, we focused on the epidermal growth factor receptor pathway and quantified proteins and their phosphorylation status in relation to tissue processing timepoints. Gene and protein expression data obtained from colorectal and liver specimens were influenced by tissue handling during surgery and by postsurgical processing time. To obtain reliable expression data, tissue processing for research and diagnostic purposes needs to be highly standardized.

Original languageEnglish (US)
Pages (from-to)11017-11028
Number of pages12
JournalOncotarget
Volume5
Issue number22
StatePublished - 2014
Externally publishedYes

Keywords

  • Biospecimen
  • Drug development
  • EGFR pathway
  • Phosphoproteins
  • Predictive biomarker
  • Tissue quality

ASJC Scopus subject areas

  • Oncology

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  • Cite this

    David, K. A., Unger, F. T., Uhlig, P., Juhl, H., Moore, H. M., Compton, C., Nashan, B., Dörner, A., de Weerth, A., & Zornig, C. (2014). Surgical procedures and postsurgical tissue processing significantly affect expression of genes and EGFR-pathway proteins in colorectal cancer tissue. Oncotarget, 5(22), 11017-11028.