Hormone sensitivity is reflected in the phospholipid profiles of breast cancer cell lines

Breast Cancer Research and Treatment
Marina SterinIsrael Ringel

Abstract

We have found that the profiles of total phospholipids in malignant breast cancer cell lines change going from hormone sensitive to highly hormone resistant cells lines. In particular, two phospholipid components that were absent or at very low levels in hormone sensitive MCF7 cells and moderately hormone sensitive cell lines (MIII, LCC2) were found in relatively high proportions in highly hormone resistant cell lines (MB435, MB231). These two components were shown to be the alkylacylphosphatidylcholine (AAPtdC) and the unsaturated analog plasmenylphosphatidylethanolamine (plasmenyl-PtdE). Another component phosphatidylethanolamine (PtdE) increased in correlation with the degree of hormone insensitivity. This was shown using 31P NMR spectroscopy of lipid extracts of the cells, and was confirmed using HPLC analysis, as well as other techniques. The significance of these results for the metabolic characteristics of these cell lines is related to the therapeutic responsiveness of breast cancer.

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