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microRNA-196a attenuates ischemic brain injury in rats by directly targeting high mobility group A1

Junan Hu1, Wei Shen1

  • 1Department of Neurosurgery, Beilun District People's Hospital of Ningbo City, Ningbo, Zhejiang 315800, P.R. China.

Experimental and Therapeutic Medicine
|February 21, 2019
PubMed

Insights

MicroRNA-196a (miR-196a) levels increase in ischemic brain injury. Reducing miR-196a lessens neuron death and brain damage, suggesting it as a therapeutic target for stroke.

Area of Science:

  • Neuroscience
  • Molecular Biology
  • Genetics

Background:

  • MicroRNA (miR) network dysfunction is implicated in neurological diseases.
  • The specific role of miRs in ischemic brain injury remains poorly understood.

Purpose of the Study:

  • To investigate the functional significance of miR-196a in ischemic brain injury.
  • To identify potential therapeutic targets for stroke.

Main Methods:

  • Transient middle cerebral artery occlusion (MCAO) in rats to model ischemic stroke.
  • Oxygen-glucose deprivation in cultured neurons.
  • Quantitative analysis of miR-196a expression.
  • Assessment of neuron cell apoptosis and infarct size.
  • Identification of miR-196a direct targets.

Main Results:

  • miR-196a expression was significantly upregulated in rat brains post-MCAO and in neurons post-oxygen-glucose deprivation.
  • Repression of miR-196a significantly reduced neuron apoptosis and infarct volume in MCAO rats.
  • miR-196a was found to directly target and inhibit high mobility group A1 (HMGA1) expression.

Conclusions:

  • miR-196a plays a crucial role in regulating neuronal cell death following ischemic brain injury.
  • HMGA1 is a direct target of miR-196a in this context.
  • miR-196a represents a potential novel therapeutic target for treating ischemic brain injury.
Keywords:
HMGA1ischemic brain injurymicroRNA-196aoxygen-glucose deprivation

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