Abstract
The anterior insular cortex (aIC) is involved in multiple neuropsychiatric disorders. Here, using the Cntnap2-deficient autism spectrum disorder (ASD) mouse model and the chronic social defect stress (CSDS)-induced depression mouse model, we show that two subpopulations of microglia in the mouse aIC played differential roles in ASD-like and depression-like behavioral phenotypes differentially. The Cx3cr1+ microglia had morphological deficits in the Cntnap2-deficient mice and were involved in social deficits and restricted repetitive behaviors, while the Tmem119+ microglia had morphological deficits in the CSDS-induced mice and contributed to impairments in sucrose preference and forced swim performance. Further, we showed that the two subsets of microglia had differential features in morphology, transcriptional profiles, electrophysiological properties, and impacts on synaptic functions. Using proteomic and metabonomic analyses, we identified two secretory factors, Fbl and Hp1bp3, that were crucial for the dysfunctions of the Cx3cr1+ and Tmem119+ microglia, respectively. Finally, we verified that Fbl and Hp1bp3 played essential roles in the behavioral deficits of the Cntnap2-deficient and the CSDS-induced mice, respectively. Our study can help understand the contribution of microglia and the aIC to neuropsychiatric-like behaviors.
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Data availability
All data supporting the findings of this study are included in this paper and the supplementary materials. Metabonomics and scRNA-seq data of microglia are available in the CNSA database (Accession number: CNP0007796). Proteomics data are available in the Integrated Proteome Resources (iProX) database (Accession number: IPX0012891000).
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Acknowledgements
We thank Xiaxia Duan, Xin-Yu She, and Songhai Shi (Tsinghua University) for technical and material help. We thank all members of the laboratory for helpful discussion. This work was supported by the Beijing Natural Science Foundation (Grant No. Z210011), the National Natural Science Foundation of China (NSFC) (Grant No. 32371008, 31830038), the Open Project of Collaborative Innovation Center for Language Ability of Jiangsu Province, China, and funding from Tsingha-Peking Center for Life Sciences.
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Q.M.Z. and Y.F.C. performed the behavioral, biochemical, proteomic, and metabonomic experiments. Y.Y.X., M.Y., and S.Y.L performed the electrophysiology experiments. Q.M.Z., Y.F.C. and N.L. performed the imaging experiments. X.J. performed the molecular biology experiments. H.G. performed the scRNA-seq analysis. J.Y. wrote the manuscript with inputs from all authors. All authors read and approved the final manuscript.
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Zhang, QM., Chen, YF., Xing, YY. et al. Anterior insular cortex regulates depression-like and ASD-like behaviors via the differential contribution of two subsets of microglia. Mol Psychiatry (2025). https://doi.org/10.1038/s41380-025-03139-1
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DOI: https://doi.org/10.1038/s41380-025-03139-1