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Related Concept Videos

Depressive Disorders: Etiology01:27

Depressive Disorders: Etiology

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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...
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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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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...
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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...
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G-protein coupled receptors are ligand binding receptors that indirectly affect changes in the cell. The actual receptor is a single polypeptide that transverses the cell membrane seven times creating intracellular and extracellular loops. The extracellular loops create a ligand specific pocket which binds to neurotransmitters or hormones. The intracellular loops holds onto the G-protein.
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Long-term Depression01:05

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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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Related Experiment Video

Updated: May 6, 2026

Network Pharmacology and Validation of the Antidepressant Mechanisms of Qiangzhifang in a Chronic Restraint Stress-induced Depression Rat Model
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[Multiple mechanisms of depression].

Chun-Lin Liu1, Ke-Feng Ruan, Jun-Wei Gao

  • 1Engineering Research Center of Modern Preparation Technology of Traditional Chinese Medicine, Ministry of Education, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.

Sheng Li Ke Xue Jin Zhan [Progress in Physiology]
|November 16, 2013
PubMed
Summary
This summary is machine-generated.

Depression, a complex mental illness, involves intricate mechanisms across multiple body systems. Research highlights the roles of neurotransmitters, hormones, and their receptors in its development and progression.

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Psychiatry

Background:

  • Depression is a prevalent mental disorder with significant global health and social impact.
  • Its pathogenesis is complex, involving multiple interacting mechanisms and organ systems.
  • Growing evidence implicates the nervous and endocrine systems in depressive disorders.

Purpose of the Study:

  • To review recent research progress on the biological underpinnings of depression.
  • To highlight the involvement of neurotransmitters, hormones, and receptors in depression.

Main Methods:

  • Literature review of recent scientific studies on depression.
  • Analysis of research focusing on neuroendocrine pathways and molecular targets.

Main Results:

  • Neurotransmitters and their receptors are key players in the neural system's involvement in depression.
  • Hormones and their corresponding receptors are implicated in the endocrine system's role in depression.
  • The interplay between neural and endocrine factors contributes to the complexity of depression.

Conclusions:

  • Recent research underscores the critical role of neuroendocrine factors in depression.
  • Understanding these complex mechanisms offers potential avenues for novel therapeutic strategies.
  • Further investigation into neurotransmitter and hormone systems is crucial for advancing depression treatment.