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Related Experiment Video

Updated: Jan 2, 2026

Network Pharmacology and Validation of the Antidepressant Mechanisms of Qiangzhifang in a Chronic Restraint Stress-induced Depression Rat Model
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Neurophysiologic Advance in Depressive Disorder.

Lin Xu1, Rongrong Mao2

  • 1Key Laboratory of Animal Models and Human Disease Mechanisms and Laboratory of Learning and Memory, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming, China.

Advances in Experimental Medicine and Biology
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Summary

Major depressive disorder (MDD) mechanisms remain unclear, with current treatments showing limitations. Reframing MDD as aberrant emotion-related learning and memory offers a new therapeutic and diagnostic research direction.

Keywords:
DepressionGlutamatergic systemKetamineNeural plasticityNeurophysiologyPsychological stress

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Pharmacology

Background:

  • Major depressive disorder (MDD) research has advanced significantly, yet underlying mechanisms remain elusive.
  • Current antidepressants exhibit limitations, including long-delay action (LDA) and low response rates.
  • The rapid-onset antidepressant efficacy of ketamine has spurred novel research avenues.

Purpose of the Study:

  • To explore the potential of reframing major depressive disorder (MDD) as a disorder of emotion-related learning and memory.
  • To identify new therapeutic and diagnostic strategies for MDD based on this novel perspective.

Main Methods:

  • Review of existing literature on MDD, antidepressant mechanisms, and ketamine's effects.
  • Analysis of the role of N-methyl-D-aspartate receptor (NMDAR)-dependent and independent pathways.
  • Examination of the connection between synaptic plasticity, learning, memory, and MDD animal models.

Main Results:

  • Ketamine's antidepressant effects involve both NMDAR-dependent and independent mechanisms.
  • These mechanisms are closely linked to synaptic plasticity, learning, and memory processes.
  • MDD animal models are fundamentally based on altered learning and memory principles.

Conclusions:

  • Viewing MDD as aberrant emotion-related learning and memory provides a clearer research direction.
  • This perspective may lead to the development of novel interventions for MDD prevention, diagnosis, and treatment.
  • Monoaminergic and glutamatergic systems are key modulators in this learning and memory framework.