抄録
Offer Organization: Japan Society for the Promotion of Science, System Name: Grants-in-Aid for Scientific Research, Category: Grant-in-Aid for Scientific Research (C), Fund Type: -, Overall Grant Amount: - (direct: 3600000, indirect: 1080000)
In genetically-modified mice (CX3CR1-GFP mice）expressing the cortical microglia with green fluorescence protein (GFP), microglia and cortical microvessels were imaged through a closed-cranial window by using a Tomita-Seylaz method with two-photon laser scanning fluorescence microscopy repeatedly up to 3 weeks. There were no detectable differences in the soma area, number density, and number of processes of the GFP-positive microglia, whereas migrated and newborn microglia could be detected. Furthermore, appearance and/or migration of microglia adjacent to neovascular capillary under chronic hypoxia (8% oxygen) was exhibited.
A stimulation with a blue light in mice genetically expressing a light-sensitive cation channel, channelrhodopsin-2 in cortical astrocytes or neurons elicited intensity-dependent increase of cerebral blood flow. Pharmacological study exhibited independent mechanism of CBF control.