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  • Title: Comparison of inhibition of bone resorption and escape with calcitonin and dibutyryl 3',5' cyclic adenosine monophosphate.
    Author: McLeod JF, Raisz LG.
    Journal: Endocr Res Commun; 1981; 8(1):49-59. PubMed ID: 6263578.
    Abstract:
    Both parathyroid hormone (PTH) and calcitonin (CT) can increase the concentration of cyclic 3',5' adenosine monophosphate (cAMP) in fetal rat bone in organ culture. Moreover, dibutyryl cAMP (dbcAMP) can both stimulate and inhibit 45Ca release from such bones depending on dose and experimental conditions. In this study we compared dbcAMP and CT for their effects on bones pretreated with PTH. Both compounds produced transient inhibition of bone resorption followed by escape. Escape from dbcAMP was independent of prostaglandin synthesis, since it occurred both in the presence and absence of indomethacin, a prostaglandin cyclo-oxygenase inhibitor.
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