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Related Concept Videos

Depressive Disorders: Etiology01:27

Depressive 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...
Stress and Mental Health01:30

Stress and Mental Health

Chronic stress profoundly affects mental health, significantly influencing mood, behavior, and overall quality of life. Research closely links chronic stress with mental health conditions such as depression, anxiety, and substance use disorders. Ongoing exposure to stress can lead to physiological and psychological changes, initiating a cycle of emotional distress and maladaptive coping mechanisms.
Individuals with depression often experience challenges in both their personal and professional...
Introduction to Stress and Lifestyle01:27

Introduction to Stress and Lifestyle

Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
Psychological Responses to Stress01:20

Psychological Responses to Stress

Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...
Stress Prevention and Stress Management Techniques II01:23

Stress Prevention and Stress Management Techniques II

Personality types, particularly Type A and Type B, significantly influence how individuals respond to stress. These personality distinctions are marked by varying levels of ambition, competitiveness, and coping styles, all of which shape an individual's resilience to stressors.
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Depression: Overview01:18

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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,...

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Related Experiment Video

Updated: Jul 14, 2026

An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents
06:55

An Unpredictable Chronic Mild Stress Protocol for Instigating Depressive Symptoms, Behavioral Changes and Negative Health Outcomes in Rodents

Published on: December 2, 2015

[Depression and stress: is there an endophenotype?].

Andrea Feijo Mello1, Mario Francisco Juruena, Carmine M Pariante

  • 1Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, SP, Brazil, and Programa de Pesquisas em Transtornos do Humor, Hospital Butler, USA. amfeijo@uol.com.br

Revista Brasileira De Psiquiatria (Sao Paulo, Brazil : 1999)
|August 30, 2007
PubMed
Summary

Depression is linked to hypothalamic-pituitary-adrenal axis dysfunction, influenced by genetics, stress, and temperament, suggesting a specific endophenotype for depression.

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Area of Science:

  • Neuroendocrinology
  • Psychiatry
  • Genetics

Context:

  • The hypothalamic-pituitary-adrenal (HPA) axis plays a crucial role in the stress response.
  • Depression is a complex disorder with various contributing factors.
  • Understanding the HPA axis in depression is key to identifying at-risk individuals.

Purpose:

  • To review current findings on the relationship between stress, the HPA axis, and depression.
  • To explore the concept of an endophenotype that predisposes individuals to depression.
  • To synthesize evidence linking HPA axis alterations to specific depression characteristics.

Summary:

  • Depression is often associated with hypercortisolemia, indicating HPA axis dysfunction, though not universally present.
  • The dexamethasone suppression test's reliability in assessing HPA axis function is questioned.
  • Factors such as depression severity, childhood trauma, serotonin transporter gene polymorphism, and temperament influence HPA axis activity.

Impact:

  • Identifies key factors contributing to HPA axis alterations in depression.
  • Highlights the role of genetics, early life stress, and temperament in depression susceptibility.
  • Suggests a multifactorial endophenotype for depression, integrating biological and environmental influences.