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The lncRNA FAL1 protects against hypoxia-reoxygenation- induced brain endothelial damages through regulating PAK1

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Abstract

Dysregulation of cerebral microvascular endothelial cells plays an important role in the pathogenesis of stroke. However, the underlying mechanisms still need to be elucidated. In the current study, we found that the long non-coding RNA (lncRNA) FAL1 was significantly reduced in response to oxygen-glucose deprivation and reoxygenation (OGD/R) stimulation in human primary brain microvascular endothelial cells (HBMVECs). Interestingly, overexpression of FAL1 ameliorated OGD/R-induced oxidative stress by reducing the production of reactive oxygen species (ROS) and increasing the level of reduced glutathione (GSH). Also, overexpression of FAL1 suppressed OGD/R-induced secretions of interleukin-6 (IL-6), monocyte chemotactic protein-1 (MCP-1), and high mobility group box-1 (HMGB-1). We then found that OGD/R-induced reduction of cell viability and release of lactate dehydrogenase (LDH) were prevented by overexpression of FAL1. Additionally, exposure to OGD/R significantly reduced the phosphorylated levels of PAK1 and AKT as well as the total level of proliferating cell nuclear antigen (PCNA), which was restored by overexpression of FAL1. Importantly, overexpression of FAL1 restored OGD/R-induced reduction in the expression of endothelial nitric oxide synthase (eNOS) and the subsequent release of nitric oxide (NO). Our results implicate that FAL1 might be involved in the process of brain endothelial cell damage.

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Acknowledgements

This work was supported by the Shandong Provincial Nature Fund Joint Special Fund Project (ZR2018LH006) and the Key Research and Development Program of Shandong Province (2015GSF118146).

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Authors and Affiliations

  1. Department of Neurosurgery, The Affiliated Hospital of Wei fang Medical University, No. 2428, Yuhe Road, Weifang, 261031, Shandong, China

    Mingqing Gao

  2. Department of Hematology, The Affiliated Hospital of Wei fang Medical University, Shandong, China

    Jieting Fu

  3. Department of Neurology, The Affiliated Hospital of Wei fang Medical University, Shandong, China

    Yanqiang Wang

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  1. Mingqing Gao
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  2. Jieting Fu
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  3. Yanqiang Wang
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Correspondence to Yanqiang Wang.

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Gao, M., Fu, J. & Wang, Y. The lncRNA FAL1 protects against hypoxia-reoxygenation- induced brain endothelial damages through regulating PAK1. J Bioenerg Biomembr 52, 17–25 (2020). https://doi.org/10.1007/s10863-019-09819-2

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  • DOI: https://doi.org/10.1007/s10863-019-09819-2

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