cGAS-mediated type I IFN signaling contributes to disease progression in drug-refractory epilepsy
Claire Hu Claire Hu

cGAS-mediated type I IFN signaling contributes to disease progression in drug-refractory epilepsy

Nature Neuroscience, 2026

Drug-refractory epilepsy (DRE) affects roughly one-third of epilepsy patients. We examined brain tissue from individuals with this condition and found robust activation of cGAS, a DNA sensor that triggers type I interferon signaling, along with widespread type-I IFN signatures in their microglia. We observed the same cGAS pathway activation in mouse models of Dravet syndrome, a genetic form of DRE. Notably, hyperexcitable neurons release DNA that directly activates microglial cGAS. When we genetically reduced or pharmacologically blocked cGAS in Dravet syndrome mice, seizures diminished, microglial inflammatory signatures normalized, and neuronal gene expression patterns returned toward healthy levels. These findings establish cGAS-mediated neuroimmune signaling as a driver of seizure pathology and identify this pathway as a compelling therapeutic target for drug-refractory epilepsy.

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Transplantation of human iPSC-derived microglia ameliorates neuropathology and circuit dysfunction in progranulin-deficient mice
Claire Hu Claire Hu

Transplantation of human iPSC-derived microglia ameliorates neuropathology and circuit dysfunction in progranulin-deficient mice

Molecular Neurodegeneration, 2026

We investigated the role of microglial signaling adaptor DAP12. Although Dap12 deletion reduced microglial tau processing and increased tau accumulation—most prominently in females—it paradoxically protected against tau-induced synapse loss, demyelination, and neuroinflammation. Single-nucleus RNA sequencing showed that Dap12 deletion prevented tau-driven transcriptional changes across microglia, neurons, and oligodendrocytes. CellChat analysis revealed that tau pathology induces SLIT2 signaling from excitatory neurons to oligodendrocytes, promoting myelin loss. Dap12 deletion suppressed neuronal Slit2 upregulation and mitigated demyelination. Spatial transcriptomics revealed a spatial correlation of SLIT2 expression and tau pathology in AD brain tissue. Thus, modulation of a DAP12-dependent neuronal SLIT2–oligodendrocyte pathway underlies resilience to tau toxicity, suggesting that selectively dampening detrimental DAP12 signaling may enhance brain resilience in AD.

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DAP12 deletion reduces neuronal SLIT2 and demyelination and enhances brain resilience in female tauopathy mice
Claire Hu Claire Hu

DAP12 deletion reduces neuronal SLIT2 and demyelination and enhances brain resilience in female tauopathy mice

Molecular Neurodegeneration, 2025

We investigated the role of microglial signaling adaptor DAP12. Although Dap12 deletion reduced microglial tau processing and increased tau accumulation—most prominently in females—it paradoxically protected against tau-induced synapse loss, demyelination, and neuroinflammation. Single-nucleus RNA sequencing showed that Dap12 deletion prevented tau-driven transcriptional changes across microglia, neurons, and oligodendrocytes. CellChat analysis revealed that tau pathology induces SLIT2 signaling from excitatory neurons to oligodendrocytes, promoting myelin loss. Dap12 deletion suppressed neuronal Slit2 upregulation and mitigated demyelination. Spatial transcriptomics revealed a spatial correlation of SLIT2 expression and tau pathology in AD brain tissue. Thus, modulation of a DAP12-dependent neuronal SLIT2–oligodendrocyte pathway underlies resilience to tau toxicity, suggesting that selectively dampening detrimental DAP12 signaling may enhance brain resilience in AD.

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