Work

Inhibition of miR-128 Abates Aβ-Mediated Cytotoxicity by Targeting PPAR-γ via NF-κB Inactivation in Primary Mouse Cortical Neurons and Neuro2a Cells

Year: 2018

Type: article

Abstract: PURPOSE: Alzheimer's disease (AD) is the sixth most common cause of death in the United States. MicroRNAs have been identified as vital players in neurodegenerative diseases, including AD. microRNA-128 (miR-128) has been shown to be dysregulated in AD. This study aimed to explore the roles and molecular mechanisms of miR-128 in AD progression. MATERIALS AND METHODS: Expression patterns of miR-128 and peroxisome proliferator-activated receptor gamma (PPAR-γ) messenger RNA in clinical samples and cells were measured using RT-qPCR assay. PPAR-γ protein levels were determined by Western blot assay. Cell viability was determined by MTT assay. Cell apoptotic rate was detected by flow cytometry via double-staining of Annexin V-FITC/PI. Caspase 3 and NF-κB activity was determined by a Caspase 3 Activity Assay Kit or NF-κB p65 Transcription Factor Assay Kit, respectively. Bioinformatics prediction and luciferase reporter assay were used to investigate interactions between miR-128 and PPAR-γ 3'UTR. RESULTS: MiR-128 expression was upregulated and PPAR-γ expression was downregulated in plasma from AD patients and amyloid-β (Aβ)-treated primary mouse cortical neurons (MCN) and Neuro2a (N2a) cells. Inhibition of miR-128 decreased Aβ-mediated cytotoxicity through inactivation of NF-κB in MCN and N2a cells. Moreover, PPAR-γ was a target of miR-128. PPAR-γ upregulation attenuated Aβ-mediated cytotoxicity by inactivating NF-κB in MCN and N2a cells. Furthermore, PPAR-γ downregulation was able to abolish the effect of anti-miR-128 on cytotoxicity and NF-κB activity in MCN and N2a cells. CONCLUSION: MiR-128 inhibitor decreased Aβ-mediated cytotoxicity by upregulating PPAR-γ via inactivation of NF-κB in MCN and N2a cells, providing a new potential target in AD treatment.

Source: Yonsei Medical Journal

DOI: 10.3349/ymj.2018.59.9.1096

Authors: Lijiao Geng, Tao Zhang, Wei Liu, Yong Chen

Institutions: Henan University, Henan University Huaihe Hospital and Huaihe Clinical Institute

Language: English

Topic: Alzheimer's disease research and treatments

Subfield: Cellular and Molecular Neuroscience

Field: Neuroscience

Domain: Life Sciences

SDG: Good health and well-being

Open Access status: gold

Estimated APC paid: $700