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In response to central nervous system (CNS) injury, astrocytes upregulate intermediate filament (nanofilament) proteins GFAP and vimentin. Whereas the intermediate filament upregulation in astrocytes is important for neuroprotection in the acute phase of injury, in some contexts it might inhibit some of the regenerative processes later on. Thus, timely modulation of the astrocyte intermediate filaments was proposed as a strategy to promote brain repair. We used clomipramine, epoxomicin and withaferin A, drugs reported to decrease the expression of GFAP, and assessed their effect on neurosupportive properties and resilience of astrocytes to oxygen and glucose deprivation (OGD). Clomipramine decreased protein levels of GFAP, as well as vimentin and nestin, and did not affect astrocyte resilience to oxidative stress. Withaferin A sensitized astrocytes to OGD. Both clomipramine and epoxomicin promoted the attachment and survival of neurons co-cultured with astrocytes under standard culture conditions. Moreover, epoxomicin increased neurosupportive properties of astrocytes after OGD. Our data point to clomipramine and epoxomicin as potential candidates for astrocyte modulation to improve outcome after CNS injury.
Pubmed ID: 28159699 RIS Download
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A contract research organization providing drug development and animal testing services. Under the name Covance Research Products Inc., based in Denver, Pennsylvania, the company also deals in the import, breeding and sale of laboratory animals. It breeds dogs, rabbits, guinea pigs, non-human primates, and pigs, and runs the largest non-human primate laboratory in Germany. (Wikipedia)
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