1 Zoological Institute, Division of Cellular Neurobiology, Technische Universität Braunschweig, 38106 Braunschweig, Germany, and AG Neuroinflammation and Neurodegeneration (NIND), Helmholtz Centre for Infection Research (HZI), 38124 Braunschweig, Germany. m.korte@tu-bs.de.