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  • Title: Regulation of glucocorticoid receptor by glucocorticoids (II)--The studies on rat liver, brain and spleen.
    Author: Xu RB, Tan JX.
    Journal: Sci China B; 1990 Mar; 33(3):288-93. PubMed ID: 2346588.
    Abstract:
    The concentration of glucocorticoids (GC) in plasma was maintained at stress level, 20-40 micrograms/dl, for 3 days by subcutaneous injection of hydrocortisone (F) in polyvinyl alcohol (PVA) into rats, and the specific binding of [3H]Dexamethasone (Dex) in liver, spleen and brain was determined before and after injection. The binding capacity of glucocorticoid receptor (GR) in liver and spleen was decreased significantly 1 h after injection and maintained at low level for several days after the concentration of GC in plasma had returned to the normal level. The Kd was not altered. The changes of GR in brain was not significant. Thus it may be concluded that GC can down-regulate GR in rats, but with different characteristics in various target organs.
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