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Identification of calreticulin as a nuclear matrix protein associated with human colon cancer

✍ Scribed by Gisela Brünagel; Uzma Shah; Robert E. Schoen; Robert H. Getzenberg

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
117 KB
Volume
89
Category
Article
ISSN
0730-2312

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✦ Synopsis

Abstract

Colon cancer is one of the most common malignancies among populations in the United States and Western Europe, and one of the leading causes of worldwide morbidity and mortality due to cancer. The early detection of colon cancer is central to the effective treatment of this disease and early detection markers are needed. We have demonstrated that high‐resolution two‐dimensional gel analysis of nuclear matrix proteins (NMPs) demonstrated a specific oncological fingerprint of colon cancer. Utilizing this approach, four proteins specific for colon cancer was identified. Additionally, one protein was expressed much more strongly in colon cancer compared to adjacent and normal donor tissue. The amino acid composition of this protein revealed sequence similarity with calreticulin. The multi‐functional protein, calreticulin, is normally found in the lumen of the endoplasmic reticulum although some reports have described a nuclear localization of the protein. The aim of this study was to confirm the identity of the protein as calreticulin as well as to evaluate the localization of calreticulin in the nuclear matrix of colon cancer tissue. J. Cell. Biochem. 89: 238–243, 2003. © 2003 Wiley‐Liss, Inc.

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