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Suitable Concentrations of Uric Acid Can Reduce Cell Death in Models of OGD and Cerebral Ischemia–Reperfusion Injury

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Abstract

Cerebral infarction (CI) is a common clinical cerebrovascular disease, and to explore the pathophysiological mechanisms and seek effective treatment means are the hotspot and difficult point in medical research nowadays. Numerous studies have confirmed that uric acid plays an important role in CI, but the mechanism has not yet been clarified. When treating HT22 and BV-2 cells with different concentrations of uric acid, uric acid below 450 μM does not have significant effect on cell viability, but uric acid more than 500 μM can significantly inhibit cell viability. After establishing models of OGD (oxygen-glucose deprivation) with HT22 and BV-2 cells, uric acid at a low concentration (50 μM) cannot improve cell viability and apoptosis, and Reactive oxygen species (ROS) levels during OGD/reoxygenation; a suitable concentration (300 μM) of uric acid can significantly improve cell viability and apoptosis, and reduce ROS production during OGD/reoxygenation; but a high concentration (1000 μM) of uric acid can further reduce cell viability and enhance ROS production. After establishing middle cerebral artery occlusion of male rats with suture method, damage and increase of ROS production in brain tissue could be seen, and after adding suitable concentration of uric acid, the degree of brain damage and ROS production was reduced. Therefore, different concentrations of uric acid should have different effect, and suitable concentrations of uric acid have neuroprotective effect, and this finding may provide guidance for study on the clinical curative effect of uric acid.

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Acknowledgments

This work was supported by the Natural Science Foundation of Guangdong Province (2016A030313609), the Medical Scientific Research Foundation of Guangdong Province (A2016199) and the Science and Technology Plan Project of Guangdong Province (2015A030302091).

Authors’ Contributions

BZ and NY designed and conducted most of the experiments. SPL and FZ designed and conducted some of the experiments. BZ and NY wrote most of the manuscript. All authors analyzed the data, revised the manuscript, and approved the final manuscript.

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Correspondence to Ning Yang.

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The authors declare no conflict of interest.

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Bin Zhang and Ning Yang have contributed equally to this work.

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Zhang, B., Yang, N., Lin, Sp. et al. Suitable Concentrations of Uric Acid Can Reduce Cell Death in Models of OGD and Cerebral Ischemia–Reperfusion Injury. Cell Mol Neurobiol 37, 931–939 (2017). https://doi.org/10.1007/s10571-016-0430-8

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