Abstract
Hypoxia-inducible factor-1α (HIF-1α) is thought to mediate pharmacoresistance in tumor by inducing Pgp overexpression. We aimed to investigate the expression of HIF-1α and MDR1/P-glycoprotein in refractory epilepsy, to explore the correlation of HIF-1α with epilepsy multidrug resistance. We collected hippocampus and mesial temporal lobe (MTL) cortex of refractory mesial temporal lobe epilepsy (mTLE) patients that underwent surgery, and established a pharmacoresistant TLE rat model kindled by coriaria lactone. We used real-time quantitative PCR (RQ-PCR) and western blot to investigate expression of HIF-1α and MDR1 in hippocampus and MTL/entorhinal cortex. We found that the expression of HIF-1α and MDR1, at both mRNA and protein levels, were up-regulated in hippocampus and MTL cortex of mTLE patients compared with the control cortex (all P < 0.05), and increased in hippocampus and entorhinal cortex of kindled rat model versus the control group (all P < 0.05). These results demonstrated the overexpression of HIF-1α and MDR1/Pgp in hippocampus and MTL/entorhinal cortex of mTLE patients and the pharmacoresistant TLE rat model. HIF-1α may have a regulatory effect on MDR1 expression in refractory epilepsy, which is probably consistent with MDR mechanism in tumor.
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This work was supported by the National Natural Science Foundation of China (no. 81371425), the scientific research foundation of Sichuan University for outstanding young scholars (no. 2082604164246), Sichuan Province basic research plan project (no. 2013JY0168) and Chengdu City Science and Technology Bureau fund (no. 12DXYB209JH-002).
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Lei Chen and Dong Zhou, as the co-corresponding authors, contributed equally to this study.
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Li, Y., Chen, J., Zeng, T. et al. Expression of HIF-1α and MDR1/P-glycoprotein in refractory mesial temporal lobe epilepsy patients and pharmacoresistant temporal lobe epilepsy rat model kindled by coriaria lactone. Neurol Sci 35, 1203–1208 (2014). https://doi.org/10.1007/s10072-014-1681-0
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DOI: https://doi.org/10.1007/s10072-014-1681-0