In vitro growth of TS/A adenocarcinoma and of the gene transfected TS/A-IL4 line on biological substrates
Pacor, S.; Magnarin, M.; Carotenuto, M.E.; Spessotto, P.; Zabucchi, G.; Sava, G.
Anticancer Research 20(1a): 191-196
2000
ISSN/ISBN: 0250-7005 PMID: 10769654 Document Number: 519778
The growth capacity and adaptation of TS/A and TS/A-IL4 lines on laminin, fibronectin, collagens I and IV and matrigel compared to plastics were studied by flow cytometry. On plastic plates, TS/A-IL4 grows in vitro more slowly than the TS/A line and shows a more differentiated phenotype. TS/A-IL4 cells loose the capacity to bind lymphocytes and peroxidase positive cells obtained from mice implanted with the same tumour. The ratio between fibroblast- and epithelial-like cells of TS/A adenocarcinoma is subjected to marked modifications depending on the substrate on which the two cell lines are grown. IL4 release per cell unit is increased by collagen I as is the number of CD54 positive cells, suggesting that, at least in part, the in vivo rejection of TS/A-IL4 tumour might be ascribed to the stimulatory effect of the tissue on the IL4 release by tumour cells. The overall result is that gene modified TS/A-IL4 line shows marked changes of behaviour, most of them depending on the substrate on which tumour cells are growing.