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The present study was carried out to determine the variation in reduced glutathione (GSH), glutathione-reductase (GSH-R), DNA and RNA contents between tumours and adjacent normal tissue surgically removed from patients with breast cancer. A highly significant increase in the content of these
Sodium butyrate (NaBu), a potent histone deacetylase inhibitor, modulates the expression of a large number of genes. The purpose of this study was to determine whether this dietary agent could induce apoptosis in MCF-7 cells, a breast cancer cell line that lacks caspase-3 activity, and to identify
OBJECTIVE
Early-stage invasive breast cancer patients have commonly undergone breast-conserving surgery and radiotherapy. In a large majority of these patients, the treatment is effective; however, a proportion will develop local recurrence. Deregulated redox systems provide cancer cells protection
Breast cancer is one of the most common cancers among women world wide and its incidence is on tremendous increase. The present study is aimed to analyze the dose-dependent chemopreventive efficacy of citronellol on 7,12-dimethylbenz(a)anthracene (DMBA)-induced rat mammary carcinogenesis. The
The authors made a comparative analysis of the activity of antioxidative enzymes and a search for a possible relationship between the activity of glutathione reductase and that of glucose-6-phosphate dehydrogenase in the blood and saliva of patients with breast tumors with varying activity of the
OBJECTIVE
The glutathione detoxification pathway includes glutathione S-transferase (GST) and peroxidase (GPX) isoenzymes as well as glutathione reductase (GSSR). Though well established from cultured cancer cell lines, its involvement in resistance is still unclear in the tumours. This study aimed
Delayed pulmonary toxicity syndrome after high-dose chemotherapy (HDC) and autologous hematopoietic support occurs in up to 64% of women with advanced-stage breast cancer. Using a similar, but nonmyeloablative, HDC treatment regimen in mice, we found both immediate and persistent lung injury,
Xanthohumol (XN) and 8-prenylnaringenin (8PN) are hop (Humulus lupulus L.) polyphenols studied for their chemopreventive effects on certain cancer types. The breast cancer line MCF-7 was treated with doses ranging from 0.001 to 20 µM of XN or 8PN in order to assess the effects on cell viability and
There is available evidence supporting a positive association between alcohol intake and risk of breast cancer. However, there is limited information regarding possible mechanisms for this effect. Past studies from our laboratory suggest that acetaldehyde accumulation in mammary tissue after alcohol
OBJECTIVE
To study the effect of epidermal growth factor (EGF) on the radiation sensitivity of MCF-7 breast cancer cells.
METHODS
Radiation dose survival curves were generated for MCF-7 cells under conditions of hormonal deprivation. Epidermal growth factor and/or a monoclonal antibody to its
OBJECTIVE
Breast carcinoma is related to the increase of lipid peroxidation in plasma with concomitant decrease of antioxidant (AO) defense capacity in blood cells, which becomes more pronounced during aging of the patients. This work evaluated the potential age-related effect of chemotherapy with
Glutathione S-transferases (GSTs) are a family of detoxification isozymes that protect cells by conjugating GSH to a variety of toxic compounds, and they may also play a role in the regulation of both cellular proliferation and apoptosis. We have previously shown that human GST P1-1, which is the
The levels of some organochlorine pesticides (OCP)s (hexachlorobenzene, HCB, alpha-hexachlorocyclohexane, alpha-HCH, beta-HCH, gamma-HCH, heptachlorepoxide, HE, bis (4-chlorophenyl)-1,1-dichloroethene, p.p'DDE, bis (4-chlorophenyl)-1,1,1-trichloroethane, p.p' DDT and total DDT (E-DDT) and
This study was carried out to determine the relationships between leptin concentrations, lipid alterations, oxidant/ antioxidant status, in vitro LDL oxidizability and LDL-fatty acid composition in overweight breast cancer patients. Glucose, insulin, leptin, lipids, LDL-cholesteryl ester fatty
BACKGROUND
Previous studies have suggested the importance of redox regulation in carcinogenesis. The aim of this study was to evaluate the prognostic role of altered redox homeostasis and oxidative DNA damage in patients with breast carcinoma before and during two cycles of