Relaxin alters the plasma osmolality-arginine vasopressin relationship in the rat
| Autor: | L. W. Eddie, P. Burns, R. S. Weisinger, E. M. Wintour |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Relaxin
Osmole Vasopressin medicine.medical_specialty Arginine Osmotic concentration Endocrinology Diabetes and Metabolism Ovariectomy Osmolar Concentration Biology Water-Electrolyte Balance Hypertonic saline Rats Plasma osmolality Arginine Vasopressin Rats Sprague-Dawley Endocrinology Internal medicine medicine Ovariectomized rat Animals Female |
| Zdroj: | The Journal of endocrinology. 137(3) |
| ISSN: | 0022-0795 |
| Popis: | During pregnancy, in women and the rat, there is a resetting of the plasma osmolality–arginine vasopressin relationship (Posmol/PAVP) such that a decrease in Posmol is maintained without suppression of PAVP. This occurs at a time when relaxin is detectable in plasma. The hypothesis tested here was that relaxin could alter the Posmol/PAVP in the non-pregnant rat. One group of ovariectomized rats (n = 15) was treated for 7 days with intravenous synthetic human relaxin (10 μg/h) in 10 pi 0·9% (w/v) NaCl. Controls were two groups of rats either with no treatment (n = 15) or treated with vehicle alone (n = 15). One-third of each group received hypertonic saline (0·4 mol NaCl/l, 2 ml/100 g body weight i.p.) on day 7, and one-third were deprived of water for the final 24 h. All rats were killed by decapitation and blood was collected rapidly (osmol in all relaxin-treated rats was significantly (P < 0·001) lower than that in both control groups, but the PAVP was unchanged. The log PAVP/Posmol regression line was significantly shifted in elevation (P Journal of Endocrinology (1993) 137, 505–510 |
| Databáze: | OpenAIRE |
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