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  • Title: Placental proteins in peripheral blood and tissues of ectopic pregnancies.
    Author: Tornehave D, Chemnitz J, Westergaard JG, Teisner B, Poulsen HK, Bolton AE, Grudzinskas JG.
    Journal: Gynecol Obstet Invest; 1987; 23(2):97-102. PubMed ID: 2438195.
    Abstract:
    Circulating human chorionic gonadotrophin (hCG), Schwangerschaftsprotein 1 (SP-1) and pregnancy-associated plasma protein A (PAPP-A) were examined in 10 women with ectopic gestation in relation to distribution and intensity of staining for these molecules using immunohistochemical techniques applied to matched trophoblastic and decidualized endometrial tissues. All 10 women revealed strong staining for hCG and SP-1 in the syncytiotrophoblast, which was apparently unrelated to maternal levels of hCG and SP-1, levels being less than the 10th centile of the normal range in 9/10 and 7/10 women, respectively. By contrast maternal PAPP-A levels seemed to correlate with the intensity and the distribution of staining for PAPP-A. Circulating PAPP-A was undetectable (less than 5 mIU/l) in 4 patients, and below the 10th centile in the remaining 6. Using immunohistochemical techniques hCG, SP-1 and PAPP-A could not be demonstrated in any of the decidualized endometrial tissues studied.
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