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Published in: The Journal of Headache and Pain 1/2011

Open Access 01-02-2011 | Original

Protection of flunarizine on cerebral mitochondria injury induced by cortical spreading depression under hypoxic conditions

Authors: Fengpeng Li, Enchao Qiu, Zhao Dong, Ruozhuo Liu, Shiwen Wu, Shengyuan Yu

Published in: The Journal of Headache and Pain | Issue 1/2011

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Abstract

A rat cortical spreading depression (CSD) model was established to explore whether cerebral mitochondria injury was induced by CSD under both normoxic and hypoxic conditions and whether flunarizine had a protective effect on cerebral mitochondria. SD rats, which were divided into seven groups, received treatment as follows: no intervention (control Group I); 1 M NaCl injections (Group II); 1 M KCl injections (Group III); intraperitoneal flunarizine (3 mg/kg) 30 min before KCl injections (Group IV); 14% O2 inhalation before NaCl injections (Group V); 14% O2 inhalation followed by KCl injections (Group VI); 14% O2 inhalation and intraperitoneal flunarizine followed by KCl injections (Group VII). Following treatment, brains were removed for the analysis of mitochondria transmembrane potential (MMP) and oxidative respiratory function after recording the number, amplitude and duration of CSD. The duration of CSD was significantly longer in Group VI than that in Group III. The number and duration of CSD in Group VII was significantly lower than that in Group VI. MMP in Group VI was significantly lower than that in Group III, and MMP in Group VII was significantly higher than that in Group VI. State 4 respiration in Group VI was significantly higher than that in Group III, and state 3 respiration in Group VII was significantly higher than that in Group VI. Respiration control of rate in Group VII was also significantly higher than that in Group VI. Thus, we concluded that aggravated cerebral mitochondria injury might be attributed to CSD under hypoxic conditions. Flunarizine can alleviate such cerebral mitochondria injury under both normoxic and hypoxic conditions.
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Metadata
Title
Protection of flunarizine on cerebral mitochondria injury induced by cortical spreading depression under hypoxic conditions
Authors
Fengpeng Li
Enchao Qiu
Zhao Dong
Ruozhuo Liu
Shiwen Wu
Shengyuan Yu
Publication date
01-02-2011
Publisher
Springer Milan
Published in
The Journal of Headache and Pain / Issue 1/2011
Print ISSN: 1129-2369
Electronic ISSN: 1129-2377
DOI
https://doi.org/10.1007/s10194-011-0300-1

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