Increased plasma norepinephrine concentration in psychotic depression
Therapeutic Advances in Psychopharmacology
|August 29, 2013
Summary
Psychotic depression (PSDEP) shows increased plasma norepinephrine (NE) and vasopressin (AVP) levels, suggesting a distinct sympathetic nervous system activation. This may explain vasopressinergic activity in PSDEP.
Area of Science:
- Neuroscience
- Psychiatry
- Endocrinology
Background:
- Previous research linked psychotic depression (PSDEP) with correlated plasma norepinephrine (NE) and vasopressin (AVP).
- Increased central noradrenergic activity correlates with plasma NE, suggesting hypothalamic-pituitary-adrenal axis activation.
Purpose of the Study:
- To investigate the association between plasma NE and PSDEP.
- To test the hypothesis that increased NE release is a mechanism in PSDEP.
Main Methods:
- Reanalyzed data from 9 PSDEP and 69 non-PSDEP patients.
- Used analysis of covariance to control for confounding variables like antidepressant treatment and smoking.
Main Results:
- PSDEP patients exhibited significantly higher plasma NE concentrations.
- The correlation between plasma NE and AVP remained significant after controlling for confounders.
Conclusions:
- Results indicate heightened sympathetic nervous system activity in PSDEP.
- This supports the role of NE in vasopressinergic activation and PSDEP as a distinct subtype of depression.
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