Abstract Title:

Effect of resveratrol on gliotransmitter levels and p38 activities in cultured astrocytes.

Abstract Source:

Neurochem Res. 2011 Jan;36(1):17-26. Epub 2010 Sep 15. PMID: 20842424

Abstract Author(s):

Hao Zhou, Qing Chen, Dan Li Kong, Jiang Guo, Qian Wang, Shou Yi Yu

Article Affiliation:

Nanfang Hospital, Southern Medical University, Guangzhou, China.

Abstract:

Accumulating evidence suggests that resveratrol may have beneficial effects against traumatic brain injury. However, its effect on the regulation of extracellular levels of gliotransmitter and on the activation of p38 MAPK in astrocytes is still unknown. We have examined whether resveratrol regulates extracellular levels of gliotransmitter as well as the activation of p38 MAPK in cultured astrocytes before and after stretch injury. The extracellular levels of glutamate, D-/L-serine and D-serine were apparently reduced by 100μM resveratrol in control astrocyte cultures. The dramatic increase of glutamate and D-serine release induced by stretch injury was also clearly inhibited by resveratrol. Resveratrol mediates this response by reduction of release through inhibition of extracellular calcium influx and increment of gliotransmitter uptake through enhancement of amino acid transporter expressed in the membrane of astrocyte. In addition, resveratrol definitely reduced the activation of p38 MAPK in cultured astrocytes following stretch injury. AMPA receptor is involved in the activation of p38 following injury. Conversely, the levels of glutamine and glycine were not obviously affected by resveratrol before and after injury. Intracellular levels of glutamate and D-serine are not apparently changed by stretch injury. Collectively, our data suggest that resveratrol might play an important role in protection ofthe nervous system after injury by decreasing the extracellular levels of gliotransmitter and inhibiting activation of p38 MAPK following injury.

Study Type : In Vitro Study

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Sayer Ji
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