The Microglial Innate Immune Receptor TREM2 Is Required for Synapse Elimination and Normal Brain Connectivity

TREM2 is a microglial innate immune receptor whose functions during brain development are still unknown. Filipello et al. demonstrate that TREM2 is essential for microglia to eliminate supernumerary synapses in the developing brain. TREM2 protein was also reduced in autistic patients, suggesting that the receptor may be involved in neurodevelopmental diseases.

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