title: The localization of pregnancy proteins (hPL, SP1 and PAPP-A) in intra- and extrauterine pregnancies.
abstract: The localization of human placental lactogen (hPL), pregnancy-specific beta-1 glycoprotein (Schwangerschaftsprotein 1, SP1) and pregnancy-associated protein A (PAPP-A) was examined in intrauterine and tubal ectopic gestation (n = 5) by the immunoperoxidase technique. The distribution of hPL and SP1 was identical in placental tissues obtained from intra- and extrauterine pregnancies, being uniformly seen throughout the syncytiotrophoblast. hPL and SP1 were not demonstrated in uterine decidual tissue from ectopic pregnancies. During early (week 8) intrauterine pregnancy, PAPP-A was not restricted to the mature syncytiotrophoblast, being observed also in some trophoblast-like cells adjacent to islands of syncytiotrophoblast. In contrast, in ectopic gestation, PAPP-A was observed in these cells at six weeks' gestation only. We were unable to detect PAPP-A in trophoblastic tissue of chorionic villi and uterine decidual tissue from ectopic gestation.
mesh_terms: D003656:Decidua / Q000378:metabolism; D004717:Endometrium / Q000378:metabolism; D005260:Female; D005865:Gestational Age; D006651:Histocytochemistry; D006801:Humans; D010928:Placental Lactogen / Q000378:metabolism; D011247:Pregnancy; D011257:Pregnancy Proteins / Q000378:metabolism*; D011271:Pregnancy, Ectopic / Q000378:metabolism*; D011266:Pregnancy-Associated Plasma Protein-A / Q000378:metabolism; D011268:Pregnancy-Specific beta 1-Glycoproteins / Q000378:metabolism; D014327:Trophoblasts / Q000378:metabolism
chemical_list: D011257:Pregnancy Proteins; D011268:Pregnancy-Specific beta 1-Glycoproteins; D010928:Placental Lactogen; D011266:Pregnancy-Associated Plasma Protein-A