Placental localization of 15-hydroxy-prostaglandin dehydrogenase in early and term human pregnancy.

Abstract:

:The human placenta possesses a large capacity for inactivation of prostanoids. This is due to the presence of large quantities of the NAD(+)-linked 15-hydroxy-prostaglandin dehydrogenase (PGDH type I; EC 1.1.1.141). In order to investigate whether a specific localization of PGDH is at the origin of the increasing placental PGDH activity during early pregnancy, PGDH activity was localized histochemically in placental tissue obtained in early pregnancy and at term. Intracellular PGDH activity was present in three distinct compartments in the placenta. First, the syncytiotrophoblast and second, the underlying cytotrophoblast layer of placental terminal villi contained PGDH. Third, scattered throughout the sections, we found chorion-like cells which showed strong staining for PGDH activity. The intensity of staining in samples before 12 weeks of gestation was much less than in samples after 12 weeks of gestation, which were comparable to those at term. Thus, the fetal cell layers at the boundary between the fetal tissues and the maternal blood have a great potential to inactivate prostanoids suggesting that the fetus protects itself against prostanoids of maternal origin.

journal_name

Placenta

journal_title

Placenta

authors

Erwich JJ,Keirse MJ

doi

10.1016/0143-4004(92)90037-t

keywords:

subject

Has Abstract

pub_date

1992-05-01 00:00:00

pages

223-9

issue

3

eissn

0143-4004

issn

1532-3102

pii

0143-4004(92)90037-T

journal_volume

13

pub_type

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