Interactions between colon cancer cells and hepatocytes in rats in relation to metastasis.

Journal of Cellular and Molecular Medicine
Olaf R F MookCornelis J F Van Noorden

Abstract

Adhesion of cancer cells to endothelium is considered an essential step in metastasis. However, we have shown in a previous study that when rat colon cancer cells are administered to the vena portae, they get stuck mechanically in liver sinusoids. Then, endothelial cells retract rapidly and cancer cells bind to hepatocytes. We investigated the molecular nature of these interactions between colon cancer cells and hepatocytes. Cancer cells in coculture with hepatocytes became rapidly activated with distinct morphological changes. Cancer cells formed long cytoplasmic protrusions towards hepatocytes in their close vicinity and these protrusions attached to microvilli of hepatocytes. Then, adhering membrane areas were formed by both cell types. Integrin subunits alphav, alpha6 and beta1 but not alphaL, beta2, beta3 and CD44 and CD44v6 were expressed on the cancer cells. In conclusion, colon cancer cells show an active behaviour to bind to hepatocytes, likely involving the integrin subunits alphav, alpha6 and beta1, indicating that early events in colon cancer metastasis in liver are distinctly different than assumed thus far.

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Jun 27, 2009·Clinical & Experimental Metastasis·John H RobertsonAlexander M Seifalian
May 31, 2012·Molecular and Cellular Biology·Sébastien TabarièsPeter M Siegel
Dec 5, 2009·Life Sciences·Jacqueline M LankelmaCornelis J F Van Noorden
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Methods Mentioned

BETA
electron microscopy
electron tomography
electrophoresis
confocal microscopy
light microscopy

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