Immunohistochemical localization of nitric oxide synthase in human fetal membranes.
METHODS
It has been demonstrated that L-arginine-nitric oxide (NO) system is present in the myometrium during pregnancy where it can regulate uterine contractility.


METHODS
We have studied by immunohistochemistry the localization of constitutive endothelial nitric oxide synthase (ecNOS) and brain nitric oxide synthase (bNOS) in human fetal membranes in term non laboring women.


RESULTS
The amniotic epithelium and the trophoblast of chorion layer stained intensively for bNOS, while for ecNOS the immunoreactivity was weak and restricted to trophoblast cells.


CONCLUSIONS
These findings are suggestive for NO production by the fetal membranes in term pregnancy.
Marinoni
E
E
Second Department of Obstetrics and Gynecology, University La Sapienza, Rome, Italy.
Di Iorio
R
R
Scucchi
L
L
Cosmi
E V
EV
D005321:Extraembryonic Membranes / Q000737:chemistry / Q000201:enzymology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D019001:Nitric Oxide Synthase / Q000032:analysis*; D011247:Pregnancy
D019001:Nitric Oxide Synthase