Efects of plasma corticosteroid concentration on the osmotic threshold for vasopressin releasing in Chagas' disease

The osmotic threshold for vasopressin release was studied in normal patients (n = 7) and in patients with the chronic form of Chagas'disease (n = 11). Positive correlation between osmotic threshold and plasma cortisol concentration was obtained for the Controls (y1 = 273,30 + 0,75x i; r = 0,78;...

Full description

Bibliographic Details
Main Authors: Tatsuto Kimachi, Joel P. R. Veiga, Euclydes C. Lima-Filho
Format: Article in Journal/Newspaper
Language:English
Published: Sociedade Brasileira de Medicina Tropical (SBMT) 1983
Subjects:
Online Access:https://doaj.org/article/c60907a2aeab48a5b7131afa1b0efa23
Description
Summary:The osmotic threshold for vasopressin release was studied in normal patients (n = 7) and in patients with the chronic form of Chagas'disease (n = 11). Positive correlation between osmotic threshold and plasma cortisol concentration was obtained for the Controls (y1 = 273,30 + 0,75x i; r = 0,78;P < 0,05), suggesting a modulating effect of cortisol on vasopressin release. The lack of correlation between the two parameters for the chronic chagasic patients was interpreted, on the basis of the general denervation associated with Chagas ' disease, to be the result of neuronal destruction in hypothalamic and/or extrahypothalamic centers related to the secretory control of vasopressin. O limiar osmótico para liberação da vaso- pressina foi estudado em pacientes normais (n = 7) e em pacientes com a forma crônica da moléstia de Chagas (n = 11). Verificou-se a existência de uma correlação positiva entre o limiar osmótico e a concentração plasmática do cortisol endógeno para os controles (y1 = 273,30 + 0,75 x i; r = 0,78, p < 0,05), sugerindo um efeito modulador do cortisol na liberação da vasopressina. A falta de correlação entre os dois parâmetros, para os pacientes chagásicos crônicos, interpretou-se, baseando-se na desnervação geral associada com a doença de Chagas, como sendo o resultado da destruição neuronal em centros hipotalâmicos ejou extra-hipotalâmicos relacionados com o controle secretário da vosopressina.