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  • Title: The corticotropin releasing hormone gene is expressed in human placenta.
    Author: Grino M, Chrousos GP, Margioris AN.
    Journal: Biochem Biophys Res Commun; 1987 Nov 13; 148(3):1208-14. PubMed ID: 3318828.
    Abstract:
    Maternal plasma immunoreactive corticotropin-releasing hormone (IR-CRH) increases progressively with pregnancy. This elevated plasma IR-CRH is presumably secreted by the placenta. To investigate further this hypothesis, we searched for the CRH mRNA and its peptide product in full term human placentae. Using a radiolabelled 48-mer oligonucleotide probe complementary to a portion of human CRH mRNA, we identified a 1300 nucleotide RNA from human placenta and rat hypothalami. We next examined the chromatographic characteristics of the placental IR-CRH. The bulk of the IR-CRH extracted from placenta and the IR-CRH secreted in vitro by placental fragments had the same chromatographic profiles as synthetic CRH. These findings indicate that the CRH gene is expressed in human placenta and imply that this organ is a site of CRH biosynthesis during pregnancy.
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