Fifty Shades of Microglia.Brioschi S, Peng V, Colonna M. Trends Neurosci. 2019 Apr 17. pii: S0166-2236(19)30044-X.
In a recent study, Masuda and colleagues (Nature 2019;566:388-392) used single-cell RNA-sequencing (scRNA-seq) to profile microglia across different anatomical compartments, developmental stages, and types of brain pathology in mice. Moreover, the authors performed a novel transcriptomic characterization of microglia from multiple sclerosis patients and identified phenotypically conserved microglial subsets between species. These findings, together with seminal prior results from various groups, provide valuable insights into the spatiotemporal heterogeneity of microglia during brain development and disease.
Spatial and temporal heterogeneity of mouse and human microglia at single-cell resolution.Masuda T, Sankowski R, Staszewski O, Böttcher C, Amann L, Sagar, Scheiwe C, Nessler S, Kunz P, van Loo G, Coenen VA, Reinacher PC, Michel A, Sure U, Gold R, Grün D, Priller J, Stadelmann C, Prinz M. Nature. 2019 Feb;566(7744):388-392.
Microglia have critical roles not only in neural development and homeostasis, but also in neurodegenerative and neuroinflammatory diseases of the central nervous system. These highly diverse and specialized functions may be executed by subsets of microglia that already exist in situ, or by specific subsets of microglia that develop from a homogeneous pool of cells on demand. However, little is known about the presence of spatially and temporally restricted subclasses of microglia in the central nervous system during development or disease. Here we combine massively parallel single-cell analysis, single-molecule fluorescence in situ hybridization, advanced immunohistochemistry and computational modelling to comprehensively characterize subclasses of microglia in multiple regions of the central nervous system during development and disease. Single-cell analysis of tissues of the central nervous system during homeostasis in mice revealed specific time- and region-dependent subtypes of microglia. Demyelinating and neurodegenerative diseases evoked context-dependent subtypes of microglia with distinct molecular hallmarks and diverse cellular kinetics. Corresponding clusters of microglia were also identified in healthy human brains, and the brains of patients with multiple sclerosis. Our data provide insights into the endogenous immune system of the central nervous system during development, homeostasis and disease, and may also provide new targets for the treatment of neurodegenerative and neuroinflammatory pathologies.
Yesterday someone said microglia why don’t you post on hot microglia imaging. Well we have done this already and now I believe some of those tools are not fit for purpose as they label other stuff in addition to microglia, like astrocytes and otherstructures. However microglia can have many faces