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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.
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Symptom-specific neural circuits and corresponding transcriptomic profiles in depression.

Jiang Wang1, Chengfeng Chen2, Xuanyu Zhang3

  • 1Mental Health Center of Tianjin University, Tianjin Anding Hospital, Tianjin 300072, China.

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|November 27, 2025
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This study mapped brain networks for depression symptoms, finding distinct circuits for anxiety, cognitive issues, and anhedonia. Gene expression analysis revealed key biological processes like synaptic function and neural plasticity underlying these symptom-specific networks.

Keywords:
DepressionDepressive symptomsFunctional connectivity network mappingNeural circuitsTranscriptomic analysis

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Genetics

Background:

  • Depression is a complex disorder with varied symptoms.
  • Understanding the specific brain networks for each symptom is crucial but limited.
  • This study aims to map these symptom-specific neural correlates.

Purpose of the Study:

  • To identify distinct neural circuits linked to specific depressive symptoms.
  • To investigate the relationship between these symptom-specific networks and gene expression.
  • To deepen the neurobiological understanding of depression heterogeneity.

Main Methods:

  • Utilized functional connectivity network mapping with resting-state fMRI data from multiple studies.
  • Performed transcriptomic analysis to correlate functional networks with gene expression.
  • Conducted functional enrichment analysis to identify biological processes.

Main Results:

  • Identified distinct neural circuits for specific symptoms: limbic/default mode networks for anxiety, cognitive impairment, rumination; visual network for anhedonia, suicidal ideation.
  • Transcriptomic analysis linked networks to genes involved in synaptic function, neural plasticity, and neurotransmission.
  • Found symptom-specific neurobiological profiles, including immune processes for cognitive impairment and neurodevelopmental features for sleep disturbance.

Conclusions:

  • Distinct neural circuits and associated gene expression patterns underlie specific depressive symptoms.
  • Key biological processes include synaptic signaling, neural plasticity, and neurotransmission.
  • Symptom-specific neurobiological features, such as immune and neurodevelopmental processes, were identified, offering new insights into depression.