Abstract
SBTI-resistant kininogenase activity was found in nonpregnant and pregnant rat uterus, placenta, amniotic fluid and fetal membranes. After trypsin treatment the kininogenase activity increased 2-3 fold. Total kininogenase (active plus inactive) was completely blocked by kallikrein antibodies. The physiological role of these kallikrein-like enzymes is unknown. It is speculated that these enzymes play a local role, perhaps in the processing of polypeptide hormones of through the release of kinins in the regulation of uterine blood flow.
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