Abstract | OBJECTIVE: STUDY DESIGN: Twenty-seven late-gestation (129 +/- 4 days [mean +/- SE]) chronically catheterized fetal sheep were studied. After a 1-hour control period fetal responses to indomethacin, 0.05 mg/kg given intravenously, followed by a 4-hour maintenance infusion (n = 9), were compared with an identical indomethacin infusion plus an arginine vasopressin V2-receptor antagonist (d[CH2]1(5), D-Phe2, Ile4,Arg8,Ala9)-VP (n = 8) or vehicle alone (n = 10). Fetal arterial and venous pressures, heart rate, and urinary flow were measured continuously. RESULTS: Fetal urinary flow rate (p < 0.0001) and free water clearance (p = 0.004) fell in response to indomethacin alone, but the addition of the arginine vasopressin V2-receptor antagonist blocked indomethacin's oliguric and free water effect. Urinary osmolality and sodium increased in both indomethacin and indomethacin+arginine vasopressin V2-receptor antagonist groups compared with vehicle (p < 0.05). Fetal arterial pressure increased in response to indomethacin, and the addition of the arginine vasopressin V2-receptor antagonist potentiated this response (p = 0.007). CONCLUSIONS:
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Authors | M P Walker, T R Moore, R A Brace |
Journal | American journal of obstetrics and gynecology
(Am J Obstet Gynecol)
Vol. 171
Issue 5
Pg. 1234-41
(Nov 1994)
ISSN: 0002-9378 [Print] United States |
PMID | 7977526
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)
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Chemical References |
- Antidiuretic Hormone Receptor Antagonists
- vasopressin, beta mercapto(beta,beta)-cyclopentamethylenepropionic acid(1)-Phe(2)-Ile(4)-Arg(8)-Ala(9)-
- Arginine Vasopressin
- Indomethacin
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Topics |
- Animals
- Antidiuretic Hormone Receptor Antagonists
- Arginine Vasopressin
(analogs & derivatives, pharmacology, physiology)
- Diuresis
- Fetus
(physiology)
- Hemodynamics
(drug effects)
- Indomethacin
- Kidney
(embryology)
- Oliguria
(chemically induced)
- Sheep
- Urine
(chemistry)
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