Ovarian Origin of Plasma and Peritoneal Fluid Prorenin in Early Pregnancy and in Patients with Ovarian Hyperstimulation Syndrome*
| Autor: | Shahar Kol, Jean E. Sealey, Joseph Itskovitz-Eldor, Nathan Lewit |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Adult
endocrine system medicine.medical_specialty Endocrinology Diabetes and Metabolism Clinical Biochemistry Ovary Luteal Phase Luteal phase Biology Biochemistry Plasma renin activity Ovarian Hyperstimulation Syndrome Endocrinology Pregnancy Internal medicine Renin Renin–angiotensin system Blood plasma medicine Paracentesis Ascitic Fluid Humans Hormone metabolism Enzyme Precursors medicine.diagnostic_test Peritoneal fluid fungi Biochemistry (medical) Hormones Pregnancy Ectopic Ovarian Cysts Pregnancy Trimester First medicine.anatomical_structure Female |
| Zdroj: | The Journal of Clinical Endocrinology & Metabolism. 82:461-464 |
| ISSN: | 1945-7197 0021-972X |
| Popis: | Prorenin is the major product of renin gene expression in the ovary. Plasma levels of prorenin are elevated in ovarian-stimulated patients and during early pregnancy. To further elucidate the source of the elevated plasma levels of prorenin, we measured prorenin, renin activity, angiotensinogen, and steroid hormone levels in the plasma, luteal fluids (luteal cysts), ascitic fluid, and in ovarian venous samples collected from a patient with severe ovarian hyperstimulation syndrome (OHSS) and ectopic pregnancy. Prorenin/renin was also measured in plasma and in peritoneal fluid obtained during therapeutic paracentesis from four patients with OHSS.Several corpora luteal fluids were obtained that were rich in estradiol (E2) and progesterone (P). Ovarian venous E2 and P were 20-fold higher than in arterial blood and as high or higher than the levels detected in the luteal fluids. The ratios of the hormonal levels in ascitic fluid and plasma were 1.9 for P and 1.4 for E2. A wide range of prorenin concentrations [1279 ± 918 sd ng/mL/hr, n = 6] were found in corpora luteal fluids, but in each the prorenin concentration was higher than in plasma (494 ng/mL/hr). Prorenin but not renin was higher (+23%) in ovarian venous than arterial blood. Prorenin in the 7 liters of ascitic fluid aspirated (2686 ng/mL/hr) was 5-fold higher than in plasma and similar to the levels measured in the corpora lutea with the highest prorenin concentrations. Renin in luteal cysts and ascitic fluid constituted 3% and 6% of the total renin (renin + prorenin), respectively. Total renin was also higher in peritoneal fluid (1538 ± 925 ng/mL/hr) than in plasma (375 ± 237 ng/mL/hr) of the 4 additional patients with severe OHSS.These findings indicate that the ovary secretes prorenin during early pregnancy and that its secretion is directed preferentially from the luteal cysts into the peritoneal cavity. In light of recent evidence of an effect of prorenin on the vascular system, the presence of a huge reservoir of prorenin in the peritoneal cavity of patients with OHSS suggests a potential role for prorenin in the pathogenesis of this syndrome. |
| Databáze: | OpenAIRE |
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