Related Experiment Video
Updated: Jun 7, 2026
14:01
Human In Vitro Suppression as Screening Tool for the Recognition of an Early State of Immune Imbalance
Published on: July 22, 2011
Immune suppression and immune activation in depression.
Joshua Blume1, Steven D Douglas, Dwight L Evans
1Department of Psychiatry, University of Pennsylvania School of Medicine, 423 Guardian Drive, 305 Blockley Hall, Philadelphia, PA 19104, USA.
Brain, Behavior, and Immunity
|October 20, 2010
Summary
Depression involves both immune suppression and activation, with markers like IL-6 and TNFα linked to illness. Further research is needed to understand these immune profiles in depressed individuals.
Area of Science:
- Psychoneuroimmunology
- Immunology
- Psychiatry
Background:
- Depression is linked to immune system dysregulation, showing both suppressed cellular immunity and inflammation.
- Immune markers in depression overlap with those in other chronic illnesses, suggesting a common pathway.
- The relationship between immune suppression and activation within the same depressed individuals remains unclear.
Purpose of the Study:
- To investigate the complex interplay of immune suppression and activation in depression.
- To explore immunoregulatory mechanisms that may explain immune disturbances in different depressed patient subsets.
- To propose a research agenda for characterizing immune profiles in depression.
Main Methods:
- Review of existing literature on immune markers in depression.
- Analysis of pre-clinical data suggesting inflammation's role in immune suppression.
- Proposal for large-scale studies assessing immunoregulatory mechanisms in depressed subjects.
Main Results:
- Depression exhibits markers of both immune suppression (e.g., reduced natural killer cell activity) and immune activation (e.g., elevated IL-6, TNFα, CRP).
- Immune dysregulation may be a shared feature between depression and its common medical comorbidities.
- Heterogeneity in depressed populations may explain varying immune profiles.
Conclusions:
- Understanding the relationship between immune suppression and activation is crucial for depression research.
- Identifying distinct immune profiles within depressed populations could refine diagnosis and treatment.
- Further research into psychoneuroimmunology can advance the assessment and treatment of depression and its comorbidities.
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,...
01:25Immunodeficiency Diseases
Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency disorders...
There are three main causes of immunodeficiency disorders...
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...
01:23Antidepressant Drugs: MAOIs and Other Agents
Atypical antidepressants, including bupropion (Wellbutrin), mirtazapine (Remeron), nefazodone (Serzone), trazodone (Desyrel), and vilazodone (Viibryd), offer unique mechanisms of action. Bupropion weakly inhibits dopamine and norepinephrine reuptake, aiding depression treatment and smoking cessation, with a low risk of sexual dysfunction. Mirtazapine enhances serotonin and norepinephrine neurotransmission, leading to sedation, increased appetite, and weight gain. As a result, it helps treat...
01:24T Cell Types and Functions
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
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...