Microglial cell

Microglial cells are the resident immune cells of the central nervous system (CNS), acting as the first line of defense against pathogens and brain injury (Source: NIH, StatPearls). Originating from yolk sac-derived myeloid progenitors, they maintain CNS homeostasis by performing immune surveillance, debris phagocytosis, and synaptic pruning during neurodevelopment (Source: PubMed). In the context of pathology, microglia can transition between various functional states; while acutely protective, chronic microglial activation is a hallmark of neurodegenerative diseases like Alzheimer's and Parkinson's, where they drive neuroinflammation and contribute to neuronal loss (Source: Nature Reviews Neurology). Although technically a cell type rather than a single molecular target, they express various receptors and enzymes—such as TREM2, CSF1R, and TSPO—that are the actual focus of modern drug discovery efforts (Source: Science Translational Medicine). Therapeutics targeting microglial pathways aim to either suppress harmful pro-inflammatory phenotypes or enhance their neuroprotective, phagocytic capabilities to clear protein aggregates like amyloid-beta (Source: Frontiers in Aging Neuroscience).

Other names

MicrogliaCNS macrophagesResident brain macrophagesHortega cells

Microglial modulation, Inhibition of microglial activation, CSF1R inhibition for microglial depletion, TREM2 agonism for enhanced phagocytosis, TSPO binding for neuroprotection