Related Experiment Video
Updated: Jul 25, 2026
07:13
The Unpredictable Chronic Mild Stress Protocol for Inducing Anhedonia in Mice
Published on: October 24, 2018
Polymorphonuclear (PMN) elastase levels in depressive disorders
1Department of Biochemistry, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey.
Biological Psychiatry
|March 1, 1996
Summary
Elevated polymorphonuclear (PMN) elastase levels are linked to depression. This study found higher PMN elastase in patients with major depression and dysthymia compared to healthy individuals, suggesting inflammation
Area of Science:
- Immunology
- Psychiatry
- Biochemistry
Background:
- Depression is a complex disorder with potential links to inflammation.
- Polymorphonuclear (PMN) elastase is an enzyme released during inflammation.
Purpose of the Study:
- To investigate polymorphonuclear (PMN) elastase levels in patients with depression.
- To determine if altered PMN elastase levels are associated with depression severity.
Main Methods:
- Compared PMN elastase levels in 68 patients with depression (major depression and dysthymia) and 40 healthy controls.
- Utilized an immunoactivation method to measure PMN elastase.
- Also measured White Blood Cell (WBC), erythrocyte sedimentation rate (ESR), immunoglobulin, and complement levels.
Main Results:
- Mean PMN elastase levels were significantly higher in patients with major depression (99.5 µg/L) and dysthymia (55.7 µg/L) compared to healthy subjects (47.3 µg/L).
- Patients with major depression with melancholia showed particularly elevated levels (289.0 µg/L).
- Statistically significant differences in PMN elastase were observed between depressed patients and the control group.
Conclusions:
- Severe depression is associated with immunological and inflammatory alterations.
- PMN elastase levels can serve as a potential biomarker for detecting inflammation in depression.
- These findings suggest a role for inflammation in the pathophysiology of depression.
More Related Videos
Related Concept Videos
01:18Depression: Overview
Depression is a prevalent mental illness marked by persistent sadness and lack of interest in previously enjoyable activities. It can take several forms, including major depression, persistent depressive disorder, and bipolar I and II disorders. Symptoms range from emotional changes like chronic worry to physical changes like sleep disturbances and suicidal thoughts. From a neurobiological perspective, depression is believed to be triggered by abnormalities in the brain's prefrontal cortex,...
01:27Depressive Disorders: MDD and Dysthymia
Depressive disorders are a group of mental health conditions characterized by pervasive feelings of sadness, diminished pleasure in life, and a significant impact on daily functioning. These conditions are most prevalent in individuals during their 30s and affect women at twice the rate of men. Contrary to popular belief, younger individuals are generally more susceptible to these disorders than older adults. Two key types of depressive disorders include Major Depressive Disorder (MDD) and...
01:27Depressive Disorders: Etiology
Depressive disorders result from a complex interplay of biological, psychological, and sociocultural factors, each contributing uniquely to the development and persistence of the condition. Understanding these factors provides critical insight into the multifaceted nature of depression.
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...
Biological Factors in Depression
Biological predispositions significantly influence the risk of developing depressive disorders. Genetic studies highlight the role of variations in the serotonin transporter...