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Erschienen in: International Journal of Colorectal Disease 12/2008

01.12.2008 | Original Article

Alterations of Chk1 and Chk2 expression in colon cancer

verfasst von: Magdalena Stawinska, Adam Cygankiewicz, Radzislaw Trzcinski, Michal Mik, Adam Dziki, Wanda M. Krajewska

Erschienen in: International Journal of Colorectal Disease | Ausgabe 12/2008

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Abstract

Background and aims

Checkpoint kinases 1 and 2 (Chk1 and Chk2) are emerging as key mediators in diverse cellular responses to genotoxic stress, guarding the integrity of the genome. Recent studies suggest the fundamental role of Chk1 and Chk2 in the network of genome surveillance pathways which coordinate cell cycle progression with DNA repair and cell survival or death. Defects in these two serine/threonine kinases are suggested contributors to the development of both hereditary and sporadic human cancer. Little is known about physiologic activities of Chk1 and Chk2 in the colorectal cancer or their role in tumorigenesis.

Patient/methods

Expression of Chk1 and Chk2 and their phosphorylated, i.e., active forms (pChk1, pChk2) was examined by Western blot and ELISA analysis in colorectal carcinomas and normal colonic mucosa.

Results/findings

Expression of Chk2 and pChk2 was noted to be decreased in around 50% of studied cancer cases. Quantitative studies of phosphorylated Chk2 revealed significant decrease of pChk2 in early stages of colorectal carcinomas. Furthermore, tumor invasion to local lymph nodes was found to correlate with the increase of pChk2 pool in the studied cases.

Interpretation/conclusion

Reduced expression of Chk2 and activated Chk2 may be an important inactivating mechanism, contributing to the development of colorectal neoplasm. However, during progression of neoplasia, activated Chk2 may contribute to the invasiveness of tumor.
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Metadaten
Titel
Alterations of Chk1 and Chk2 expression in colon cancer
verfasst von
Magdalena Stawinska
Adam Cygankiewicz
Radzislaw Trzcinski
Michal Mik
Adam Dziki
Wanda M. Krajewska
Publikationsdatum
01.12.2008
Verlag
Springer-Verlag
Erschienen in
International Journal of Colorectal Disease / Ausgabe 12/2008
Print ISSN: 0179-1958
Elektronische ISSN: 1432-1262
DOI
https://doi.org/10.1007/s00384-008-0551-8

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