Microglia articles from across Nature Portfolio

Human microglia transplanted in the mouse brain mount a multipronged response to amyloid-β pathology, displaying unique transcriptional states. Alzheimer’s disease risk genes are differentially regulated across cell states and profoundly alter microglial function.

Mutations in profilin 1 (PFN1), which modulates actin dynamics, are associated with ALS. Here the authors show that expression of ALS-PFN1 is sufficient to induce deficits in human microglia-like cells, including impaired phagocytosis and lipid metabolism, and that gain-of-function interactions between ALS-PFN1 and PI3P may underlie these deficits.

Blocking mitochondrial complex I in pro-inflammatory microglia protects the central nervous system against neurotoxic damage and improves functional outcomes in vivo in an animal disease model.

A microglial state, featuring lipid droplets and secretion of neurotoxic factors, is shown to be most prominent in people with Alzheimer’s disease who have the APOE4 genotype.

Factors regulating lipid and lysosomal clearance in microglia and peripheral macrophage are not known. Here, authors nominate and validate transcription factors BHLHE40 and BHLHE41 as regulators of these processes in health and disease.

We show that genetic disruption of TFEB- and vacuolar ATPase-mediated lysosomal signaling leads to increased tau pathology and defective microglia activation. Our findings demonstrate an essential role of the lysosome in regulating microglia activity in tauopathy and Alzheimer’s disease.

By analyzing human samples and multiple mouse models of Huntington’s disease, we found that complement proteins and microglia mediate early and selective loss of corticostriatal synapses. Strategies that block this process can reduce synaptic loss, increase excitatory input to the striatum and prevent the development of cognitive deficits in mice.

Microglia exhibit unexpected sex differences in gene expression and accessibility and compromised inflammatory responses during the aging process in mice. We established a mouse model with accelerated microglial turnover (3xDR), which results in aged microglia in non-aged brains. Analysis of this model revealed that aged microglia themselves contribute to cognitive decline.