[Osmolality and secretion of vasopressins during pregnancy in Meriones crassus].
Endocrine and renal parameters were measured in a desert rodent, Meriones crassus. In virgin females, the urine and plasma osmolality was 2018 +/- 136 and 325 +/- 3 mosm/kg (m +/- SEM), the level of circulating vasopressin, 162 +/- 22 pg/ml and the plasma renin activity 14.3 +/- 0.9 ng/ml per h. During pregnancy, the renin-angiotensin system was activated, and the plasma vasopressin values remained similar to those of virgin animals in spite of a lower blood plasma osmotic pressure. During this period, the regulation of the hydromineral balance was modified. These data suggest a lowering of the osmotic thresholds for vasopressin and possibly also for thirst during pregnancy in this desert rodent.
Baddouri
K
K
Université Mohammed V, faculté des sciences, Unité d'endocrinologie comparée, Rabat, Maroc.
Quyou
A
A
D000818:Animals; D005260:Female; D005849:Gerbillinae / Q000097:blood / Q000378:metabolism* / Q000652:urine; D009994:Osmolar Concentration; D009997:Osmotic Pressure; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000097:blood / Q000378:metabolism* / Q000652:urine; D012083:Renin / Q000097:blood; D012084:Renin-Angiotensin System / Q000502:physiology; D014667:Vasopressins / Q000097:blood / Q000378:metabolism*
D014667:Vasopressins; D012083:Renin
Osmolalité et sécrétion de vasopressine au cours de la gestation chez Meriones crassus.