Modulation of intra-epithelial expansion of human T24 bladder-carcinoma cells in murine urothelium by growth factors and extracellular-matrix components.

Abstract:

:The high recurrence rate of bladder cancer is probably due to an efficient repopulation of the bladder by residual transformed cells after resection of the tumour. However, the regenerating capacity of the normal urothelial cells is very high. To study the balance between regenerating normal urothelium and out-growth of transformed urothelial cells, we recently developed an in vitro co-cultivation model. With this model system we studied the effects of growth factors and extracellular-matrix components on the intra-epithelial expansion of human T24 bladder-carcinoma cells in primary mouse-bladder explants. Exposure of the cultures to acidic fibroblast growth factor (aFGF) and laminin led to a dramatic increase in the number of invasive T24 cells into the primary urothelium. Epidermal growth factor (EGF) and collagen types I and IV counteracted the infiltration of individual T24 cells. EGF, aFGF, laminin and collagen types I and IV did not directly affect the migration and proliferation of T24 cells. Apparently, the efficacy of invasion of transformed urothelial cells into primary urothelium is not only dependent on the intrinsic characteristics of the transformed cells, but can be influenced to a considerable extent by exogenous components exerting their influence on the normal urothelium. The clinical relevance of this observation needs to be studied further.

journal_name

Int J Cancer

authors

Rebel JM,Thijssen CD,Vermey M,Zwarthoff EC,Van der Kwast TH

doi

10.1002/ijc.2910600523

subject

Has Abstract

pub_date

1995-03-03 00:00:00

pages

707-11

issue

5

eissn

0020-7136

issn

1097-0215

journal_volume

60

pub_type

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