Relevance of Ki-67 antigen expression and K-ras mutation in colorectal liver metastases Journal Article
| Authors: | Petrowsky, H.; Sturm, I.; Graubitz, O.; Kooby, D. A.; Staib-Sebler, E.; Gog, C.; Köhne, C. H.; Hillebrand, T.; Daniel, P. T.; Fong, Y.; Lorenz, M. |
| Article Title: | Relevance of Ki-67 antigen expression and K-ras mutation in colorectal liver metastases |
| Abstract: | Aims: The liver is a frequent site of metastases from colorectal cancer. While these lesions are potentially amenable to surgical resection, they are usually very aggressive, and recurrence is frequent. Mutations of the proto-oncogene K-ras are thought to impart a strong growth signal to tumour cells and are closely associated with the development of malignancies of the colon and rectum. Hepatic metastases from colorectal cancer have notably elevated proliferative rates. The present study was performed to investigate the relationship between proliferation or K-ras mutation and prognosis following curative resection of colorectal liver metastases. Methods: Colorectal liver metastases from 41 patients undergoing curative hepatic resection were examined for proliferation status and presence of K-ras mutations. The proliferative activity was assessed by Ki-67 immuno-histochemistry. DNA from the same tissue samples was screened for point mutations in codon 12 of the K-ras gene using a novel microplate-based allelic-specific hybridization assay. Ki-67 scores and K-ras status were then related with patient survival as determined through retrospective analysis. Results. Median survival was 40 months. Patients with high Ki-67 scores (≥50%) had significantly shorter median survival compared with those with low scores (30 vs 44 months, log-rank P=0.02). A high Ki-67 score was an independent negative prognostic factor by multivariate regression analysis (relative risk = 3.04, P=0.036). K-ras point mutations were detected in 6/41 patients (15%), but mutational status did not correlate with Ki-67 score or survival. Conclusions: These findings suggest that the tumour proliferative index is a useful predictor of aggressive tumour behaviour and an indicator of patient survival. The presence of K-ras mutations does not appear to correlate with tumour proliferation status or patient survival. © 2001 Harcourt Publishers Ltd. |
| Keywords: | immunohistochemistry; signal transduction; adult; cancer survival; controlled study; aged; middle aged; cancer surgery; survival rate; gene mutation; major clinical study; cancer recurrence; cancer growth; liver neoplasms; colorectal cancer; ki 67 antigen; antigen expression; cell proliferation; ki-67 antigen; allele; cell division; cancer screening; retrospective study; colorectal neoplasms; survival time; liver metastasis; dna; ki-67; scoring system; liver resection; multivariate analysis; oncogene k ras; genes, ras; codon; point mutation; regression analysis; colon carcinogenesis; sample; hybridization; k-ras; liver metastases; humans; prognosis; human; male; female; priority journal; article |
| Journal Title: | European Journal of Surgical Oncology |
| Volume: | 27 |
| Issue: | 1 |
| ISSN: | 0748-7983 |
| Publisher: | Elsevier Inc. |
| Date Published: | 2001-02-01 |
| Start Page: | 80 |
| End Page: | 87 |
| Language: | English |
| DOI: | 10.1053/ejso.2000.1029 |
| PUBMED: | 11237496 |
| PROVIDER: | scopus |
| DOI/URL: | |
| Notes: | Export Date: 21 May 2015 -- Source: Scopus |
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