[HTML][HTML] Development of a 3D angiogenesis model to study tumour–endothelial cell interactions and the effects of anti-angiogenic drugs

A Amann, M Zwierzina, S Koeck, G Gamerith… - Scientific reports, 2017 - nature.com
A Amann, M Zwierzina, S Koeck, G Gamerith, E Pechriggl, JM Huber, E Lorenz, JM Kelm…
Scientific reports, 2017nature.com
The tumour microenvironment and tumour angiogenesis play a critical role in the
development and therapy of many cancers, but in vitro models reflecting these
circumstances are rare. In this study, we describe the development of a novel tri-culture
model, using non-small cell lung cancer (NSCLC) cell lines (A549 and Colo699) in
combination with a fibroblast cell line (SV 80) and two different endothelial cell lines in a
hanging drop technology. Endothelial cells aggregated either in small colonies in Colo699 …
Abstract
The tumour microenvironment and tumour angiogenesis play a critical role in the development and therapy of many cancers, but in vitro models reflecting these circumstances are rare. In this study, we describe the development of a novel tri-culture model, using non-small cell lung cancer (NSCLC) cell lines (A549 and Colo699) in combination with a fibroblast cell line (SV 80) and two different endothelial cell lines in a hanging drop technology. Endothelial cells aggregated either in small colonies in Colo699 containing microtissues or in tube like structures mainly in the stromal compartment of microtissues containing A549. An up-regulation of hypoxia and vimentin, ASMA and a downregulation of E-cadherin were observed in co- and tri-cultures compared to monocultures. Furthermore, a morphological alteration of A549 tumour cells resembling “signet ring cells” was observed in tri-cultures. The secretion of proangiogenic growth factors like vascular endothelial growth factor (VEGF) was measured in supernatants. Inhibition of these proangiogenic factors by using antiangiogenic drugs (bevacizumab and nindetanib) led to a significant decrease in migration of endothelial cells into microtissues. We demonstrate that our method is a promising tool for the generation of multicellular tumour microtissues and reflects in vivo conditions closer than 2D cell culture.
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