PMID: 7536030Jan 1, 1995Paper

Microvessel density, endothelial cell proliferation and tumour cell proliferation in human colorectal adenocarcinomas

Annals of Oncology : Official Journal of the European Society for Medical Oncology
P B VermeulenL Y Dirix

Abstract

Thymidine incorporation studies performed in animal tumour models, revealed major differences in endothelial cell proliferation when tumour tissue was compared with normal tissue. The fraction of proliferating endothelial cells is reported to be increased by a factor of 30 to 40 in tumour tissue. To make it possible to analyze the endothelial cell proliferation in human tumours, an immunohistochemical double staining technique comprising CD31, an endothelial cell marker, and Ki-67, a proliferation marker, was developed. Endothelial cell proliferation was analysed in 21 primary human colorectal adenocarcinomas and in the adjacent mucosa. Proliferating endothelial cells were found throughout the entire carcinoma. The mean overall endothelial cell labeling index (ECLI) was 9.9% (range, 5.4-18.0), and the labeling index of endothelial cells in areas of intense neovascularisation was even higher. Mean ECLI in the vascular hot spots was 21.0% (range, 6.8-35.0), and the mean tumour cell labeling index (TCLI) in the maximally Ki-67 immunostained areas was 78.3% (range 47.0-89.7). In 14 of 21 carcinomas, these areas were predominantly found at the luminal margin of the tumour, as were the vascular hot spots. A significant positive corre...Continue Reading

Citations

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