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bioRxiv · 10.1101/2025.07.24.666523

MeCP2 regulates cell type-specific functions of depressive-like symptoms in the nucleus accumbens

Bae, J.·Kim, S. H.·Jung, S. A.·Frankiv, N.·Hwang, E. M.·Kim, Y.-M.·Lee, S.·Im, H.-I.
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Abstract

MeCP2 (methyl CpG binding protein 2) is a transcriptional regulator that modulates gene expression in response to environmental stimuli. Although recent studies have implicated MeCP2 in stress responses and depression, its precise role is not completely understood. In this study, we identify a cell type-specific function of MeCP2 in the regulation of depression-like symptoms within the nucleus accumbens (NAc), a key brain region for emotional and stress processing. We observed differential MeCP2 expression in distinct cell populations of the NAc following chronic restraint stress (CRS) and investigated the behavioral and electrophysiological consequences of cell type-specific MeCP2 manipulation. We also explored the molecular mechanisms by which MeCP2 alleviates depression-like symptoms in the NAc and associated neural circuit regions through cell type-specific profiling of the spatial transcriptome. Our findings demonstrate that MeCP2 contributes to synaptic and circuit-level regulation in a cell type-specific manner within the NAc and ultimately mitigates CRS-induced depression-like behaviors. O_FIG O_LINKSMALLFIG WIDTH=200 HEIGHT=147 SRC="FIGDIR/small/666523v1_ufig1.gif" ALT="Figure 1"> View larger version (26K): org.highwire.dtl.DTLVardef@1ae5875org.highwire.dtl.DTLVardef@1319231org.highwire.dtl.DTLVardef@174ef60org.highwire.dtl.DTLVardef@fb061_HPS_FORMAT_FIGEXP M_FIG Graphical abstract.Schematic Summary of the functional role of accumbal MeCP2 C_FIG

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Bae, J., Kim, S. H., Jung, S. A., Frankiv, N., Hwang, E. M., Kim, Y.-M., Lee, S., Im, H.-I.. 2025-07-30. MeCP2 regulates cell type-specific functions of depressive-like symptoms in the nucleus accumbens. https://doi.org/10.1101/2025.07.24.666523

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