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Polyunsaturated fatty acids are cytotoxic to ZR-75-1 human breast tumor cells in culture. This effect may be potentiated by the simultaneous addition of iron. When cytotoxicity was measured in the presence of different concentrations of both gamma-linolenic acid and ferrous chloride there was an
Gamma linolenic acid (GLA) is a polyunsaturated fatty acid, which induces cytotoxicity and regulates cell adhesion in cancer cells. The molecular mechanism of these actions is not clear. We have shown that GLA acts via peroxisome proliferator activated receptors (PPARs), by stimulating their
Intracellular free fatty acid (FFA) release and peroxidation of polyunsaturated fatty acid (PUFA) were studied in cultured human breast cancer cells (ZR-75-1) exposed to gamma-linolenic acid with iron (GLA + Fe). This treatment results in cell death. Increased intracellular FFA were observed in
It has been reported that gamma-linolenic acid (GLA)-rich diets suppress mammary carcinogenesis and transplanted tumor growth and that GLA inhibits the growth of cultured human cancer cell lines. We compared the effects of dietary GLA and linoleic acid (LA) on the growth of MDA-MB-435 human breast
Lipid peroxidation in human breast cancer (ZR-75-1) cells and cancer cell killing were confirmed by using ultraviolet (UV)-spectrophotometry and mass spectrometry (MS). ZR-75-1 cells and human normal fibroblast CCD-41-SK (41Sk) cells were cultured with gamma-linolenic acid (GLA) and ferrous iron Fe
Since it is thought that breast adipose tissue could influence breast cancer clinical presentation, we wanted to characterize specifically the relationship between breast adipose tissue fatty acid profile and Inflammatory Breast cancer (IBC).Two hundred This study investigated the effect on drug uptake in multidrug resistant cells by the incorporation of the essential fatty acid gamma-linolenic acid (GLA). The cell lines used were the MCF-7/R resistant human breast cancer and MGH-U1/R bladder cancer. Uptake of drug (doxorubicin, epirubicin,
Gamma linolenic acid (GLA) has been proposed as a valuable new cancer therapy having selective anti-tumour properties with negligible systemic toxicity. Proposed mechanisms of action include modulation of steroid hormone receptors. We have investigated the effects of GLA with primary hormone therapy
Cyclooxygenase-2 (COX-2), the inducible COX form, is a bi-functional membrane-bound enzyme that typically metabolizes arachidonic acid (downstream ω-6 fatty acid) to form 2-series of prostaglandins known to be involved in cancer development. Overexpression of COX-2 has been found in a majority of
The mechanism by which tumour cells may be killed in vitro by exogenous polyunsaturated fatty acids may involve lipid peroxidation. Gamma-linolenic acid caused a dose and time-dependent reduction in ZR-75-1 cell growth. However, altering either the incubator temperature (35, 37 and 39 degrees C) or
It has been suggested that exogenous unsaturated fatty acids (UFAs) may increase the cytotoxic activity of cancer chemotherapeutic agents. We examined how y-linolenic acid (GLA; 18: 3n-6), the most promising UFA in the treatment of human tumors, affects the effectiveness of the lipophilic drug
It has been suggested that dietary interventions may improve the effectiveness of cancer chemotherapy. We have examined the combined in vitro cytotoxicity of paclitaxel and the fatty acids gamma-linolenic acid (GLA, 18:3n-6) and oleic acid (OA, 18:1n-9) in human breast carcinoma MDA-MB-231 cells.
The omega-6 polyunsaturated fatty acid gamma-linolenic acid (GLA; 18:3n-6), which is found in several plant oils and is used as an herbal medicine, has antitumor activity in vitro. We examined the effect of GLA on the expression of the Her-2/neu (erbB-2) oncogene, which is involved in development of
BACKGROUND
Mechanistic data suggest that different types of fatty acids play a role in carcinogenesis and that antioxidants may modulate this relationship but epidemiologic evidence is lacking. Our aim was to investigate the association between plasma saturated, monounsaturated and polyunsaturated