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7 резултата
Elevation of pi class glutathione S-transferase activity in human breast cancer cells by transfection of the GST pi gene and its effect on sensitivity to toxins.
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Increased expression of the glutathione S-transferase (GST; E.C.2.5.1.18) pi class isozyme is associated with both malignant transformation and drug resistance, as well as with decreased estrogen receptor content in breast cancer. In order to further characterize the role of this enzyme in drug
Impact of Aromatase protein variants and drug interactions in breast cancer: a molecular docking approach.
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Breast cancer is a frequently reported cancer in women all over the world. Several methods available to cure the breast cancer based on stage. This study focused on chemoprevention drugs of Aromatase, a potential target in breast cancer. Natural variants of Aromatase are very common; they have been
Peroxidatic catecholestrogen production by human breast cancer tissue in vitro.
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The ability of breast cancer tissues from postmenopausal women to form catechol estrogens was examined by using a product isolation assay. Initial assays were carried out in the presence of either: (a) NADPH, the co-factor for monooxygenase mediated catecholestrogen (CE) formation or; (b)
Antineoplastic drug sensitivity of human MCF-7 breast cancer cells stably transfected with a human alpha class glutathione S-transferase gene.
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Studies have suggested that the alpha class glutathione S-transferase (GST) may protect cells from the chemotherapeutic drugs chlorambucil and melphalan. In order to further define the function of human alpha class GST, a complementary DNA which encodes it was ligated into an expression vector under
Differential expression of glutathione S-transferase, glutathione peroxidase and glutathione reductase in normal and malignant human breast tissues.
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In the present study we have compared the levels of glutathione (GSH) S-transferase, GSH peroxidase and GSH reductase in human breast tumors and adjacent normal tissues obtained from the same individuals. We have also quantitated GST pi type antigen in these samples by western blotting. GST pi
Increased levels of alpha-class and pi-class glutathione S-transferases in cell lines resistant to 1-chloro-2,4-dinitrobenzene.
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Glutathione S-transferase (GST) enzymes are often over-expressed in tumor cells made resistant to cytotoxic drugs but it is unclear whether GST over-expression is directly linked to the resistance mechanism. We have made a human lung tumor cell line resistant to 1-chloro-2,4-dinitrobenzene (CDNB) in
Adriamycin resistance in human tumor cells associated with marked alteration in the regulation of the hexose monophosphate shunt and its response to oxidant stress.
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We found that Adriamycin increased the pentose phosphate shunt activity in both Adriamycin-sensitive (WT) and Adriamycin-resistant (ADRR) human breast cancer MCF-7 cells. In contrast, hydrogen peroxide and cumene hydroperoxide markedly stimulated pentose-shunt activity in ADRR but only moderately
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