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Updated: Aug 5, 2026

Isolation of Cortical Microglia with Preserved Immunophenotype and Functionality From Murine Neonates
Published on: January 30, 2014
The critical role of microglia in the stress response
Ke Chen1, Zong-Yuan Xuan1, Bao-Yi Sun1
1Department of Forensic Medicine, School of Medicine, Nantong University, Nantong 226000, China.
Abstract:
Microglia are the principal resident innate immune cells of the central nervous system (CNS). Beyond maintaining brain homeostasis via cytokine secretion and phagocytic clearance, they fulfill essential roles in synaptic pruning, oligodendrocyte maturation, and higher-order functions including learning and memory. In response to stress exposure, microglia undergo robust activation, characterized by morphological remodeling, altered phagocytic activity, and dysregulated inflammatory signaling, positioning them as active mediators of the integrated systemic stress response. This review systematically synthesizes preclinical and clinical evidence regarding the multifaceted contributions of microglia to stress processing, their mechanistic involvement in the pathogenesis of major stress-related disorders-including post-traumatic stress disorder (PTSD), major depressive disorder (MDD), Alzheimer's disease (AD), and Parkinson's disease (PD)-and summarizes emerging microglia-targeted therapeutic strategies. We underscore the substantial mechanistic and translational value of microglial research for advancing our understanding of stress adaptation and associated brain pathologies.
Insights
Microglia, the brain's immune cells, are key players in stress responses and related disorders. Targeting microglia offers new therapeutic avenues for stress-related brain conditions.
Area of Science:
- Neuroscience
- Immunology
- Cell Biology
Background:
- Microglia are the primary immune cells in the central nervous system (CNS).
- They are crucial for brain homeostasis, synaptic pruning, and cognitive functions like learning and memory.
- Microglial activation is a hallmark of the systemic stress response, involving morphological and functional changes.
Purpose of the Study:
- To systematically review the role of microglia in stress processing.
- To elucidate their involvement in the pathogenesis of stress-related disorders such as PTSD, MDD, AD, and PD.
- To summarize current and emerging therapeutic strategies targeting microglia.
Main Methods:
- Systematic synthesis of preclinical and clinical evidence.
- Review of studies on microglial activation in response to stress.
- Analysis of microglial mechanisms in stress-related neuropathologies.
Main Results:
- Microglia are integral mediators of the integrated stress response.
- Their dysregulation contributes to the development of major stress-related disorders.
- Evidence highlights their multifaceted roles in brain adaptation and pathology.
Conclusions:
- Microglial research is vital for understanding stress adaptation and brain diseases.
- Targeting microglia presents promising therapeutic potential for stress-related conditions.
- Further investigation into microglial functions can advance treatments for neurological and psychiatric disorders.
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