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XB-ART-30174
Mol Cell Endocrinol 1983 Jul 01;311:151-60. doi: 10.1016/0303-7207(83)90038-2.
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cAMP-dependent protein kinase regulates in ovo cAMP level of the Xenopus oocyte: evidence for an intracellular feedback mechanism.

Mulner O , Bellé R , Ozon R .


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Microinjection of cAMP-dependent protein kinase inhibitor (1.8 microM) increases the cAMP level of Xenopus oocyte. Its effect was observed in full-grown (stage VI) as well as in vitellogenic (stage IV) oocytes. In contrast the inhibitor I1 of protein phosphatase-1 blocks cAMP accumulation. Progesterone (1 microM) decreases the cAMP level in control and in PKI-treated oocytes of both stages. These results show that cAMP concentration is regulated by a cAMP-dependent phosphorylation indicating the presence of a feedback mechanism. The feedback control is disrupted when oocyte is induced to mature by progesterone.

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Genes referenced: camp