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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Osmoregulation of thirst and vasopressin secretion in Kallmann's syndrome.

It has been suggested that abnormalities of thirst and vasopressin secretion commonly coexist with Kallmann's syndrome. Out-patient plasma osmolality, plasma sodium and 24-hour urine volume were similar in 10 patients with Kallmann's syndrome and 10 matched controls. Six patients underwent dynamic testing of osmoregulation with hypertonic sodium chloride infusion. There were similar rises in plasma AVP concentration in patients (0.4 +/- 0.1-6.2 +/- 1.2 pmol/l, P less than 0.001) and controls (0.4 +/- 0.1-5.7 +/- 1.0 pmol/l P less than 0.001). Thirst ratings rose in similar fashion in patients (0.7 +/- 0.3-6.2 +/- 1.0 cm, P less than 0.001) and controls (1.0 +/- 0.3-7.2 +/- 0.5 cm. P less than 0.001). Drinking rapidly abolished thirst and lowered AVP concentrations in both groups before major changes in plasma osmolality occurred. Linear regression analysis defined similar osmotic thresholds for thirst onset and vasopressin release in the two groups, and there was no difference in the calculated sensitivity of the osmoreceptor/vasopressin secretory unit as defined by the slopes of the regression lines. We conclude that osmoregulation is normal in Kallmann's syndrome.[1]

References

  1. Osmoregulation of thirst and vasopressin secretion in Kallmann's syndrome. Thompson, C.J., White, M.C., Baylis, P.H. Clin. Endocrinol. (Oxf) (1989) [Pubmed]
 
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