Hyponatremia in rats induces downregulation of vasopressin synthesis.
Hyponatremia in rats induces downregulation of vasopressin synthesis.
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大鼠低钠血症会导致加压素合成下调。
DOI:
10.1172/jci114804
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发表时间:
1990
期刊:
影响因子:
--
通讯作者:
Sherman,TG
中科院分区:
文献类型:
--
作者:
Robinson,AG;Roberts,MM;Evron,WA;Verbalis,JG;Sherman,TG
Hyponatremia due to inappropriate secretion of vasopressin is a common disorder in human pathophysiology, but vasopressin synthesis during hypoosmolality has not been investigated. We used a new method to quantitate synthesis of vasopressin in rats after 3, 7, and 14 d of hyponatremia induced by administering dDAVP (a vasopressin agonist) and a liquid diet. Vasopressin synthesis was completely turned off by 7 d. Vasopressin mRNA levels in the hypothalamus paralleled the reduction in synthesis and were reduced to levels of only 10-15% of the content in control rats. When hyponatremia was corrected by withdrawal of dDAVP, vasopressin mRNA slowly returned to normal over 7 d. The observation that vasopressin synthesis can be so completely turned off leads to several conclusions: under normal physiological conditions the neurohypophysis is chronically upregulated; there must be an osmotic threshold for initiation of vasopressin synthesis (and release); the large store of hormone in the posterior pituitary is essential for vasopressin to be available during times of decreased synthesis; and, finally, some nonosmolar stimulus for synthesis must be present during clinical disorders when vasopressin is secreted (and synthesized) despite hypoosmolality.Images
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DOI:
10.1056/nejm196309122691102
发表时间:
1963
期刊:
The New England journal of medicine
影响因子:
--
作者:
T. Amatruda;P. Mulrow;J. Gallagher;W. H. Sawyer
通讯作者:
W. H. Sawyer
影响因子:
4.8
作者:
Hans H. Zinggl;Diana Lefebvre;Guillermina Almazang
通讯作者:
Guillermina Almazang
影响因子:
19.6
作者:
Earl A. Zimmerman;Alan G. Robinson
通讯作者:
Earl A. Zimmerman;Alan G. Robinson
DOI:
10.1152/ajpendo.1977.233.1.e37
发表时间:
1977
期刊:
The American journal of physiology
影响因子:
--
作者:
R. Weitzman;D. Fisher
通讯作者:
D. Fisher
影响因子:
19.6
作者:
Verbalis,JG;Drutarosky,MD
通讯作者:
Drutarosky,MD