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Vasopressin in human cerebrospinal fluid
The Journal of Clinical Endocrinology and Metabolism
|February 1, 1980
Summary
A blood-cerebrospinal fluid barrier for arginine vasopressin exists in humans. Under certain brain conditions, vasopressin can increase in CSF independently of plasma levels, impacting brain function.
Area of Science:
- Neuroendocrinology
- Clinical Neuroscience
Background:
- Arginine vasopressin (AVP) plays a crucial role in regulating physiological functions.
- Understanding AVP distribution between plasma and cerebrospinal fluid (CSF) is vital for neurological disorders.
Purpose of the Study:
- To investigate the relationship between plasma and CSF arginine vasopressin levels.
- To determine if a barrier exists for AVP between blood and CSF in humans.
- To explore the implications of altered AVP levels in central nervous system disorders.
Main Methods:
- Radioimmunoassay (RIA) was used to measure AVP concentrations.
- Synchronous plasma and CSF samples were collected from 62 patients with central nervous system disorders.
- Comparison of AVP levels in patients with and without neurological conditions.
Main Results:
- In healthy individuals, plasma and CSF AVP levels were comparable.
- Most patients with intracranial disorders showed AVP levels within the normal range (1-4 pg/ml).
- Some patients exhibited elevated plasma AVP with normal CSF levels, while others had higher CSF than plasma AVP, particularly in diabetes insipidus and subarachnoid hemorrhage.
Conclusions:
- Evidence supports the existence of a blood-CSF barrier to arginine vasopressin in humans.
- Pathological conditions can lead to independent secretion of AVP into the CSF.
- Altered CSF AVP levels may have significant clinical implications for brain function and neurological diseases.