Abstract
Background: Ischemic stroke is a very dangerous disease with high incidence, fatality and disability rate in human beings. Massive evidence has indicated that oxidative stress and inflammation are intimately correlated with progression of ischemic stroke. Additionally, LncRNAs were reported to be involved in ischemic stroke. Here, we aim to explore the effects and molecular mechanism of lncRNA OIP5-AS1 on oxidative stress and inflammation in ischemic stroke. Methods: HMC3 and SH-SY5Y cells were under the condition of oxygen-glucose deprivation/reoxygenation (OGD/R) treatment to establish cell models of ischemic stroke. Commercial kits were employed to detect the indicators of oxidative stress including ROS, MDA and SOD. The expression of OIP5-AS1, miR-155-5p and IRF2BP2 mRNA was determined using RT-qPCR. The protein levels of inflammatory factors including TNF-α, IL-1β and IL-6 and IRF2BP2 were assessed by western blot and/or ELISA. Luciferase activity assay was employed to validate their correlations among OIP5-AS1, miR-155-5p and IRF2BP2. Results: In OGD/R-induced HMC3 and SH-SY5Y cells, the expression of OIP5-AS1 and IRF2BP2 was reduced while miR-155-5p was elevated. OGD/R induction promoted oxidative stress and inflammatory response in HMC3 and SH-SY5Y cells, while OIP5-AS1 or IRF2BP2 sufficiency as well as miR-155-5p inhibitor attenuated OGD/R-induced these influences. In addition, IRF2BP2 knockdown abolished the suppressive impacts of OIP5-AS1 overexpression on oxidative stress and inflammatory response in OGD/R-induced HMC3 and SH-SY5Y cells. Mechanistically, OIP5-AS1 enhanced IRF2BP2 expression via sponging miR-155-5p. Conclusion: OIP5-AS1 suppressed oxidative stress and inflammatory response to alleviate cell injury caused by OGD/R induction in HMC3 and SH-SY5Y cells through regulating miR-155-5p/IRF2BP2 axis, which might offer novel targeted molecules for ischemic stroke therapy.
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Abbreviations
- OGD/R:
-
oxygen-glucose deprivation/reoxygenation
- ROS:
-
reactive oxygen species
- MDA:
-
malondialdehyde
- SOD:
-
superoxide dismutase
- lncRNA:
-
Long non-coding RNA
- IRF2BP2:
-
Interferon regulatory factor 2 binding protein2
- IRF-2:
-
Interferon regulatory factor-2
- IL4:
-
Interleukin-4
- MCAO/R:
-
middle cerebral artery occlusion/reperfusion
- ox-LDL:
-
oxidative low-density lipoprotein
- HFD:
-
high fat diet
- EMEM:
-
Eagle’s minimum essential medium
- FBS:
-
fetal bovine serum
- ELISA:
-
Enzyme-linked immunosorbent assay
- CCK-8:
-
cell counting kit-8
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This work was supported by Hainan Provincial Cerebrovascular Disease Clinical Medical Center.
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Guarantor of integrity of the entire study: Ying Xia; study concepts: Ji-Kun Zhang; study design: Ji-Kun Zhang; definition of intellectual content: Ying Xia; literature research: Ji-Kun Zhang, You Li; experimental studies: Ji-Kun Zhang, You Li, Zheng-Tao Yu, Jun-Wen Jiang; data acquisition: You Li, Hong Tang; data analysis: Ji-Kun Zhang, Guo-Long Tu; statistical analysis: Ji-Kun Zhang, Jun-Wen Jiang; manuscript preparation: Ji-Kun Zhang; manuscript editing: Ji-Kun Zhang; manuscript review: Ying Xia; All the authors approved for the final version.
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Zhang, JK., Li, Y., Yu, ZT. et al. OIP5-AS1 Inhibits Oxidative Stress and Inflammation in Ischemic Stroke Through miR-155-5p/IRF2BP2 Axis. Neurochem Res 48, 1382–1394 (2023). https://doi.org/10.1007/s11064-022-03830-7
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DOI: https://doi.org/10.1007/s11064-022-03830-7