27-Hydroxycholesterol regulates cholesterol synthesis and transport in C6 glioma cells.

The oxysterol 27-Hydroxycholesterol (27-OHC) is a major cholesterol metabolite that can cross the blood brain barrier (BBB) from peripheral circulation to the brain. Currently, the role of 27-OHC on cholesterol homeostasis in astrocytes and the underlying mechanisms are not defined. Since all brain cholesterol is essentially synthesized in brain itself and astrocytes as net producers of cholesterol are essential for normal brain function, here we investigated the effects of 27-OHC on cholesterol synthesis and transport in C6 glioma cells.

The oxysterol 27-hydroxycholesterol increases oxidative stress and regulate Nrf2 signaling pathway in astrocyte cells.

The disturbance in cholesterol metabolism has been considered as a cause of alzheimer's disease (AD), which dues to the oxidative damage and cell apoptosis in the brain. We aimed to investigate the toxicity and mechanism of AD-like pathology caused by cholesterol oxidation metabolite 27-hydroxycholesterol (27-OHC) in astrocyte cells. C6 cells were treated with 0, 5, 10, 20 µM 27-OHC for 24 h (h).

Synaptic responses evoked by tactile stimuli in Purkinje cells in mouse cerebellar cortex Crus II in vivo.

Background: Sensory stimuli evoke responses in cerebellar Purkinje cells (PCs) via the mossy fiber-granule cell pathway. However, the properties of synaptic responses evoked by tactile stimulation in cerebellar PCs are unknown. The present study investigated the synaptic responses of PCs in response to an air-puff stimulation on the ipsilateral whisker pad in urethane-anesthetized mice.