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Ubiquitin hybrid protein gene expression during human colon cancer progression.

Abstract
Ubiquitin is involved in cell-cycle control and DNA replication through a specific proteolytic pathway. Our previous studies demonstrated selected higher expression of a gene encoding ubiquitin-ribosomal protein S27a in poorly differentiated colon carcinoma cell lines. In this study, we evaluated this ubiquitin hybrid protein gene expression in surgical specimens of colon cancers. Northern blot analysis showed that ubiquitin hybrid protein messenger RNA was overexpressed in primary colon cancers compared with adjacent normal colon mucosae in 17 of 20 patients. Dot blot analysis of RNA of 27 tumor samples revealed significantly greater expression in higher Dukes' stage primary colon tumors and liver metastases. These data imply that protein translation machinery is highly activated during progression and metastasis of colon tumors, and that ubiquitin hybrid protein may be useful as a marker of biological aggressiveness.
AuthorsK Mafune, J M Wong, R J Staniunas, M L Lu, T S Ravikumar, L B Chen, G D Steele Jr
JournalArchives of surgery (Chicago, Ill. : 1960) (Arch Surg) Vol. 126 Issue 4 Pg. 462-6 (Apr 1991) ISSN: 0004-0010 [Print] United States
PMID2009061 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)
Chemical References
  • Biomarkers, Tumor
  • RNA, Messenger
  • RNA, Neoplasm
  • Ribosomal Proteins
Topics
  • Aged
  • Aged, 80 and over
  • Biomarkers, Tumor (metabolism)
  • Blotting, Northern
  • Colonic Neoplasms (metabolism, pathology)
  • Female
  • Gene Expression
  • Humans
  • Immunoblotting
  • Liver Neoplasms (secondary)
  • Male
  • Middle Aged
  • Neoplasm Staging
  • RNA, Messenger (metabolism)
  • RNA, Neoplasm (metabolism)
  • Ribosomal Proteins (genetics, metabolism)

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