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Plasma miR-124 as a biomarker for cerebral infarction
Huachun Weng1, Chunshen Shen, Gou Hirokawa
1Department of Genomic Medicine, Research Institute, National Cerebral and Cardiovascular Center, Suita, Osaka, Japan.
Biomedical Research (Tokyo, Japan)
|May 10, 2011
Summary
Plasma miR-124 levels increase after stroke. This brain-specific microRNA (miRNA) shows potential as an early biomarker for detecting cerebral infarction.
Area of Science:
- Biochemistry
- Molecular Biology
- Neuroscience
Background:
- MicroRNAs (miRNAs) are small, endogenous RNAs regulating gene expression.
- Plasma miRNAs are emerging as potential biomarkers for various diseases.
- miR-124 is predominantly expressed in the central nervous system.
Purpose of the Study:
- To investigate plasma miR-124 as a potential biomarker for cerebral infarction.
- To assess changes in plasma miR-124 levels following a stroke model.
Main Methods:
- miRNA array analysis to determine tissue-specific expression.
- Middle cerebral artery occlusion (MCAO) model in rats to induce cerebral infarction.
- Measurement of plasma miR-124 concentrations at different time points post-MCAO.
Main Results:
- miR-124 expression is highly specific to the central nervous system and neuronal cells.
- Plasma miR-124 concentrations significantly increased 6 hours after MCAO.
- Elevated miR-124 levels persisted up to 48 hours post-MCAO.
Conclusions:
- Plasma miR-124 is a promising candidate biomarker for early detection of cerebral infarction.
- Brain-specific miRNAs can be reliably detected in plasma following neurological injury.
- This finding supports the use of circulating miRNAs in diagnosing neurological diseases.
