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The dexamethasone receptor in the Novikoff Hepatoma. Characterization and changes in concentration and nuclear uptake during glucocorticoid therapy.


ABSTRACT: Novikoff hepatoma ascites cells, grown intraperitoneally in rats, are shown to possess a high-affinity, low-capacity dexamethasone-binding protein. The receptor protein has an intracellular localization and concentration, association constant (Ka), glucocorticoid specificity and nuclear uptake in the presence of dexamethasone comparable with those of the G-protein of rat liver. During therapy of the tumour-bearing animal with cortisol, marked cyclic variations were observed in the concentration and nuclear uptake of the putative G-protein in the tumor cells; more transient variations were also observed in the Ka value of the receptor protein.

SUBMITTER: Liu SL 

PROVIDER: S-EPMC1172525 | biostudies-other | 1975 Dec

REPOSITORIES: biostudies-other

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