Angiotropism of human prostate cancer cells: implications for extravascular migratory metastasis.

Abstract:

OBJECTIVES:To report several samples of invasive human prostate cancer showing angiotropism, and to use human prostate cancer cells stably expressing green fluorescence protein (GFP) in in vitro and in vivo models to assess the dissemination pathway of prostate cancer cells. MATERIALS AND METHODS:Malignant melanoma and prostate carcinoma cells can migrate along anatomical structures such as nerves; previous studies showed that melanoma cells can be perivascular, on the outside of the endothelium, i.e. they are angiotropic, which suggests the hypothesis that melanoma cells also may migrate along vascular channels, termed 'extravascular migratory metastasis' (EVMM). Thus we examined histologically 10 human prostatic carcinoma specimens for the presence of angiotropism. In vitro, the PC-3 prostate cancer cells were co-cultures with capillary-like structures. In vivo, PC-3 cells were implanted on the chick chorio-allantoic membrane (CAM). RESULTS:Histologically, in all 10 cases, angiotropism was detected at least focally within the tumour or at the advancing front of the tumour. In vitro, the PC-3 cells spread along the external surface of the vascular tubules; in vivo, PC-3 cells formed a cuff around some vessels a few millimetres beyond the tumour, showing angiotropism. Histopathology of the CAM confirmed the perivascular location of tumour cells and the absence of tumour cells within the vessel lumina. CONCLUSION:The presence of angiotropic tumour cells in human invasive prostate cancers, associated with the angiotropism of GFP prostate cancer cells cultivated in vitro and in vivo in angiogenic models, raises the possibility that some prostate tumour cells may migrate along the external surface of vessels as a mechanism of spread, i.e. EVMM.

journal_name

BJU Int

journal_title

BJU international

authors

Lugassy C,Vernon SE,Warner JW,Le CQ,Manyak M,Patierno SR,Barnhill RL

doi

10.1111/j.1464-410X.2005.05474.x

keywords:

subject

Has Abstract

pub_date

2005-05-01 00:00:00

pages

1099-103

issue

7

eissn

1464-4096

issn

1464-410X

pii

BJU5474

journal_volume

95

pub_type

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