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  • Title: Hormonal interactions with benzodiazepine binding sites in vitro.
    Author: Deckert J, Marangos PJ.
    Journal: Life Sci; 1986 Aug 25; 39(8):675-83. PubMed ID: 3016447.
    Abstract:
    Prostaglandin A1 and hormones like corticosteroids and DL-Thyroxin (T4) inhibit binding of [3H]RO 5-4864 and [3H] Clonazepam to their respective binding sites with inhibition constants in the low micromolar range. The corticosteroid Cortisone inhibits [3H] RO 5-4864, but not [3H] Clonazepam binding in a competitive manner with an inhibition constant of 4.3 +/- 0.7 microM, Prostaglandin A1 inhibits [3H] Clonazepam, but not [3H] RO 5-4864 binding in a competitive manner with an inhibition constant of 6 +/- 1.2 microM and DL-Thyroxin (T4) inhibits both [3H] RO 5-4864 and [3H] Clonazepam binding with inhibition constants of 12.1 +/- 2.2 and 1.6 +/- 0.4 microM respectively. While the inhibition of [3H] RO 5-4864 binding by DL-Thyroxin (T4) is competitive, the inhibition of [3H] Clonazepam binding is of the mixed type as indicated by Scatchard Plot.
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