Physiol. Res. 54: 409-418, 2005


The Effects of Parenteral Lipid Emulsions on Cancer and Normal Human Colon Epithelial Cells in vitro

J. HOFMANOVÁ1, Z. ZADÁK2, R. HYŠPLER2, J. MIKESKA3, P. ŽĎÁNSKÝ2,
A. VACULOVÁ1, J. NETÍKOVÁ1, A. KOZUBÍK1


1Laboratory of Cytokinetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, 2Department of Metabolic Care and Gerontology, Charles University, Teaching Hospital, Hradec Králové and 3Infusia Hořátev, a. s., Czech Republic

Received June 14, 2004
Accepted October 19, 2004
On-line available December 9, 2004

Summary
Differences in lipid metabolism of tumor and normal tissues suggest a distinct response to available lipid compounds. In this study, the in vitro effects of five types of commercial parenteral lipid emulsions were investigated on human cell lines derived from normal fetal colon (FHC) or colon adenocarcinoma (HT-29). Changes of the cellular lipid fatty acid content, cell oxidative response, and the cell growth and death rates were evaluated after 48 h. No effects of any type of emulsions were detected on cell proliferation and viability. Compared to the controls, supplementation with lipid emulsions resulted in a multiple increase of linoleic and linolenic acids in total cell lipids, but the content of arachidonic, eicosapentaenoic, and docosahexaenoic acids decreased particularly in HT-29 cells. The concentration of emulsions which did not affected HT-29 cells increased the percentage of floating and subG0/G1 FHC cells probably due to their higher reactive oxygen species production and lipid peroxidation. Co-treatment of cells with antioxidant Trolox reduced the observed effects. Our results imply that lipid emulsions can differently affect the response of colon cells of distinct origin.

Key words
Fat emulsion • Reactive oxygen • Lipid peroxidation • Apoptosis • Tumor cells


© 2005 by the Institute of Physiology, Czech Academy of Sciences