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MiR-29 Targets PUMA to Suppress Oxygen and Glucose Deprivation/Reperfusion (OGD/R)-induced Cell Death in Hippocampal Neurons

[ Vol. 15 , Issue. 1 ]

Author(s):

Rong Wei, Rufang Zhang, Hongmei Li, Hongyun Li, Saiji Zhang, Yewei Xie, Li Shen* and Fang Chen*   Pages 47 - 54 ( 8 )

Abstract:


Introduction: We previously demonstrated that microRNAs (miRNA) play an important role in Hypothermic Circulatory Arrest (DHCA)-associated neural injury. However, the specific role of miRNAs in the pathogenesis of DHCA-induced neuron death is still unclear.

Material and Methods: Thus, in the present study, we investigated miR-29 expression and roles in neuronal HT-22 cells with Oxygen-glucose Deprivation/reoxygenation (OGD/R). In this study, the model of OGD/R was established using an airtight culture container and the anaeropack. Measurement of Reactive Oxygen Species (ROS) production and Mitochondrial Membrane Potential (MMP) was done using the probes of JC-1 and H2DCFDA. The microRNA (miRNA) profile in hippocampal neurons from rat model of DHCA was determined by miRNA deep sequencing.

Results: We found that the expression of the miR-29 family (miR-29a/b/c) was significantly reduced in model of DHCA and OGD/R. Overexpression of the miR-29 family inhibited the OGD/R-induced elevation of ROS and reduction of MMP in HT-22 cells. In addition, administration of the miR-29 family suppressed proteins of Keap1, Bax and PUMA and increased Nrf2 expression. We further demonstrated that the miR-29 family targeted the PUMA by luciferase reporter assay and Western blot analysis.

Conclusion: In conclusion, our data suggest that by targeting a pro-apoptotic BCL2 family member PUMA, the miR-29 family might emerge as a strategy for protection against DHCA-mediated neural cell injury.

Keywords:

DHCA, miRNA, oxidative stress, apoptosis, PUMA, Reactive Oxygen Species (ROS).

Affiliation:

Department of Anesthesiology, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062, Department of Cardiothoracic Surgery, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062, Department of Cardiothoracic Surgery, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062, Department of Anesthesiology, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062, Department of Anesthesiology, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062, Department of Cardiothoracic Surgery, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062, Department of Cardiothoracic Surgery, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062, Department of Urologic Surgery, Shanghai Children`s Hospital, Shanghai Jiao Tong University, NO. 355, Luding Road, Shanghai, 200062



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