AP-1 Complex Linked to Brain Plasticity in Rodent Meta-Analysis

A meta-analysis conducted by researchers at the Institute for Neurosciences, a joint centre of the Spanish National Research Council and Miguel Hernández University of Elche, alongside the University of Warsaw, has identified conserved gene expression signatures associated with environmental stimulation in rodents, EurekAlert reported eurekalert.org. The team initially screened more than 300 publications on environmental enrichment and selected 20 RNA sequencing studies for standardized cross-study evaluation eurekalert.org. Combining the datasets using three distinct statistical methods enabled the identification of recurring transcriptomic shifts regardless of differing experimental housing conditions eurekalert.org.

Animals in enriched environments received enhanced opportunities for physical activity, exploration, and social interaction compared to standard housing eurekalert.org. According to the study published in Molecular Neurobiology, the recurring expression patterns were heavily concentrated in genes governing synaptic structures and synaptic plasticity eurekalert.org. These processes dictate how neuronal connections adapt their functional strength in response to external stimulation eurekalert.org.

AP-1 Complex Activation

The meta-analysis highlighted genes involved in rapid responses to neuronal activity, particularly the Fos and Jun gene families eurekalert.org. These families encode proteins that assemble into the AP-1 transcription factor complex, which acts as a regulatory hub for downstream genes linked to synaptic remodeling eurekalert.org. These findings corroborate earlier experimental research by the team demonstrating in mice that the AP-1 complex mediates long-lasting changes in cognitive ability triggered by early-life experience eurekalert.org.

The mEEtaBrain Database

To facilitate further research, the authors developed mEEtaBrain, an open-access web application containing the processed meta-analysis data eurekalert.org. The tool allows researchers to filter gene expression profiles by specific genes, analytical criteria, and brain regions eurekalert.org. The authors emphasized that the identified expression signatures reflect rodent models and cannot be directly translated to humans without further causal validation eurekalert.org.

Meta-analysis identifies AP-1 role in rodent brain plasticity across 20 RNA-seq studies

AP-1 Complex Activation

The mEEtaBrain Database

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