Comparative genomic hybridization analysis of primary colorectal carcinomas and their synchronous metastases

Al Mulla, F., Keith, W.N. , Pickford, I.R., Going, J.J. and Birnie, G.D. (1999) Comparative genomic hybridization analysis of primary colorectal carcinomas and their synchronous metastases. Genes, Chromosomes and Cancer, 24(4), pp. 306-314.

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We have analyzed 26 tumors from 12 patients with metastatic colorectal adenocarcinoma by comparative genomic hybridization (CGH). Primary tumors and their lymph node metastases from five Dukes' C patients as well as primary tumors and their liver metastases from seven Dukes' D patients were used to assess the extent of genetic differences between primary and secondary colorectal carcinomas from the same patients, to calculate the degree of clonal divergence and genetic heterogeneity in metastatic colorectal cancer, and to determine the differences in genetic imbalances between Dukes' C and D stage tumors. We show that the same genetic aberrations were frequently found in the primary tumors and their metastases. However, metastases often contained genetic aberrations not found in the corresponding primary tumors. The comparison of Dukes' stages C and D revealed genetic aberrations common to both. However, reduced copy number of chromosome arm 17p (5/5 vs. 0/7; <I >P</I > = 0.001) was significantly associated with Dukes' stage C and lymph node metastases, while increased copy number of chromosome arms 6p (6/7 vs. 0/5; <I >P</I > = 0.007) and 17q (5/7 vs. 0/5; <I >P</I > = 0.027) was associated more with Dukes' stage D and liver metastases. Our results established a repertoire of chromosomal alterations associated with metastatic colorectal cancer and suggest that Dukes' C (lymph node metastasis) tumors are not always simply an earlier stage of Dukes' D (liver metastasis) tumors and, thus, in some instances at least, they are distinct forms of the disease.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Going, Dr James and Keith, Professor Nicol and Pickford, Mr Ian
Authors: Al Mulla, F., Keith, W.N., Pickford, I.R., Going, J.J., and Birnie, G.D.
Subjects:R Medicine > RC Internal medicine > RC0254 Neoplasms. Tumors. Oncology (including Cancer)
Q Science > QH Natural history > QH426 Genetics
College/School:College of Medical Veterinary and Life Sciences > Institute of Cancer Sciences
Journal Name:Genes, Chromosomes and Cancer

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