Related Experiment Video
Updated: Apr 14, 2026
Rapid and Refined CD11b Magnetic Isolation of Primary Microglia with Enhanced Purity and Versatility
Published on: April 13, 2017
Methyl-CpG Binding Protein 2 Regulates Microglia and Macrophage Gene Expression in Response to Inflammatory Stimuli
James C Cronk1, Noël C Derecki2, Emily Ji3
1Center for Brain Immunology and Glia, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA; Department of Neuroscience, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA; Graduate Program in Neuroscience, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA; Medical Scientist Training Program, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA.
Abstract:
Mutations in MECP2, encoding the epigenetic regulator methyl-CpG-binding protein 2, are the predominant cause of Rett syndrome, a disease characterized by both neurological symptoms and systemic abnormalities. Microglial dysfunction is thought to contribute to disease pathogenesis, and here we found microglia become activated and subsequently lost with disease progression in Mecp2-null mice. Mecp2 was found to be expressed in peripheral macrophage and monocyte populations, several of which also became depleted in Mecp2-null mice. RNA-seq revealed increased expression of glucocorticoid- and hypoxia-induced transcripts in Mecp2-deficient microglia and peritoneal macrophages. Furthermore, Mecp2 was found to regulate inflammatory gene transcription in response to TNF stimulation. Postnatal re-expression of Mecp2 using Cx3cr1(creER) increased the lifespan of otherwise Mecp2-null mice. These data suggest that Mecp2 regulates microglia and macrophage responsiveness to environmental stimuli to promote homeostasis. Dysfunction of tissue-resident macrophages might contribute to the systemic pathologies observed in Rett syndrome.
Insights
Mutations in methyl-CpG-binding protein 2 (MECP2) cause Rett syndrome. This study shows MECP2 deficiency impairs microglia and macrophages, contributing to disease progression and systemic issues.
Area of Science:
- Neuroscience
- Genetics
- Immunology
Background:
- Rett syndrome is caused by MECP2 mutations, leading to neurological and systemic issues.
- Microglial dysfunction is implicated in Rett syndrome pathogenesis.
- MECP2 is an epigenetic regulator crucial for neuronal function.
Purpose of the Study:
- To investigate the role of MECP2 in microglial and macrophage function in Rett syndrome.
- To explore the impact of MECP2 deficiency on immune cell populations and their responses.
- To determine if restoring MECP2 can ameliorate disease phenotypes.
Main Methods:
- Analysis of Mecp2-null mouse models.
- RNA sequencing of microglia and peritoneal macrophages.
- Assessment of immune cell populations and lifespan.
- Postnatal re-expression of Mecp2.
Main Results:
- Mice lacking Mecp2 showed activated and depleted microglia and macrophages.
- Mecp2-deficient immune cells exhibited increased glucocorticoid and hypoxia-induced transcripts.
- MECP2 regulates inflammatory gene expression.
- Postnatal Mecp2 re-expression extended lifespan in Mecp2-null mice.
Conclusions:
- MECP2 regulates immune cell responses to environmental stimuli, maintaining homeostasis.
- Microglia and macrophage dysfunction in MECP2-deficient individuals may contribute to Rett syndrome's systemic pathologies.
- Targeting immune cell dysfunction could be a therapeutic strategy for Rett syndrome.
Related Concept Videos
02:23Master Transcription Regulators
01:28Inflammatory Response
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
02:26NF-κB-dependent Signaling Pathway
NF-κB-dependent Signaling Mechanism
The...