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Updated: Aug 2, 2025
07:44
An Electrochemiluminescence-Based Assay for MeCP2 Protein Variants
Published on: May 22, 2020
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Systemic Proteome Phenotypes Reveal Defective Metabolic Flexibility in Mecp2 Mutants
Stephanie A Zlatic1, Erica Werner1, Veda Surapaneni1
1Department of Cell Biology, Emory University, Atlanta, GA, USA, 30322.
Biorxiv : the Preprint Server for Biology
|April 17, 2023
Summary
Mutations in MECP2 cause Rett syndrome, a systemic disease affecting neurodevelopment. This study reveals widespread impacts on metabolism and gene expression across organs and brain regions.
Area of Science:
- Neuroscience
- Genetics
- Metabolic Disorders
Background:
- Monogenic neurodevelopmental disorders, like Rett syndrome caused by MECP2 mutations, are increasingly viewed as systemic diseases impacting overall development.
- Understanding the systemic effects of MECP2 mutations is crucial for developing effective therapeutic strategies.
Approach:
- This study investigated the systemic disease model of Rett syndrome by analyzing transcriptomes and proteomes in Mecp2-null mice and human cells.
- Comprehensive assessments were performed across various organs (liver, kidney, skeletal muscle) and brain regions (cortex, hippocampus, striatum).
Key Points:
- Widespread transcriptome and proteome changes were observed in presymptomatic Mecp2-null mice and mutant human cells.
- MECP2-sensitive proteomes were enriched in synaptic and metabolic pathways, particularly lipid metabolism and mitochondrial function.
- MECP2 mutations impaired pyruvate-dependent mitochondrial respiration but preserved glutamine utilization.
Conclusions:
- Mutations in MECP2 lead to systemic perturbations in lipid and mitochondrial metabolism.
- These metabolic alterations limit cellular flexibility in utilizing mitochondrial fuels, contributing to the systemic nature of Rett syndrome.
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