Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
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Δευτέρα 10 Ιουλίου 2017

The effect of CXCR2 inhibition on seizure activity in the pilocarpine epilepsy mouse model

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Publication date: Available online 10 July 2017
Source:Brain Research Bulletin
Author(s): Tao Xu, Xinyuan Yu, Teng Wang, Ying Liu, Xi Liu, Shu Ou, Yangmei Chen
C-X-C motif chemokine receptor 2 (CXCR2) is one of the most well characterized chemokine receptors and is a potential target for treating brain pathologies involving inflammatory processes, including epilepsy. However, the role of CXCR2 in epilepsy has not been investigated, and whether CXCR2 modulates seizure activity in temporal lobe epilepsy (TLE) remains unknown. In this study, we aimed to determine the potential role of CXCR2 in intractable TLE patients and in pilocarpine-induced epileptic mice. Here, through Western blotting and semi-quantitative immunohistochemistry, we detected that CXCR2 protein expression was up-regulated (by nearly 50%) in the temporal neocortex of TLE patients and in the hippocampus and adjacent temporal cortex of pilocarpine mice model. Double-label immunofluorescence and immunohistochemical analysis indicated that CXCR2 was expressed in neurons. To investigate the effect of the CXCR2 selective antagonist SB225002 on seizure activity, SB225002 was i.p. administered during the latency window of spontaneous recurrent seizures (SRSs). This treatment increased (by nearly 40%) the latency of SRSs and reduced (by nearly 50%) the frequency of SRSs during the chronic period of epilepsy. This study suggests that CXCR2 plays a critical role in modifying epileptic seizure activity and that CXCR2 blockade could be a potential molecular therapeutic target for epilepsy.



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