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- W2076132743 abstract "[3H]Triamcinolone acetonide glucocorticoid receptor complexes from human salivary gland adenocarcinoma cells (HSG cells) were shown to be activated with an accompanying decrease in molecular weight in intact cells, as analyzed by gel filtration, DEAE chromatography, the mini-column method and glycerol gradient centrifugation. Glucocorticoid receptor complexes consist of steroid-binding protein (or glucocorticoid receptor) and non-steroid-binding factors such as the heat-shock protein of molecular weight 90,000. To determine whether the steroid-binding protein decreases in molecular weight upon activation, affinity labeling of glucocorticoid receptor in intact cells by incubation with [3H]dexamethasone 21-mesylate, which forms a covalent complex with glucocorticoid receptor, was performed. Analysis by gel filtration and a mini-column method indicated that [3H]dexamethasone 21-mesylate-labeled receptor complexes can be activated under culture conditions at 37 degrees C. SDS-polyacrylamide gel electrophoresis of [3H]dexamethasone 21-mesylate-labeled steroid-binding protein resolved only one specific 92 kDa form. Furthermore, only one specific band at 92 kDa was detected in the nuclear fraction which was extracted from the cells incubated at 37 degrees C. These results suggest that there is no change in the molecular weight of steroid-binding protein of HSG cell glucocorticoid receptor complexes upon activation and that the molecular weight of nuclear-binding receptor does not change, although the molecular weight of activated glucocorticoid receptor complexes does decrease. Triamcinolone acetonide induced an inhibitory effect on DNA synthesis in HSG cells. Dexamethasone 21-mesylate exerted no such effect and blocked the action of triamcinolone acetonide on DNA synthesis. These results suggests that dexamethasone 21-mesylate acts as antagonist of glucocorticoid in HSG cells. The fact that dexamethasone 21-mesylate-labeled receptor complexes could be activated and could bind to DNA or nuclei as well as triamcinolone acetonide-labeled complexes suggests that dexamethasone 21-mesylate-labeled complexes can not induce specific gene expression after their binding to DNA." @default.
- W2076132743 created "2016-06-24" @default.
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- W2076132743 date "1988-07-01" @default.
- W2076132743 modified "2023-09-25" @default.
- W2076132743 title "Nonactivated and activated glucocorticoid receptor complexes from human salivary gland adenocarcinoma cell line" @default.
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- W2076132743 doi "https://doi.org/10.1016/0167-4889(88)90129-2" @default.
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