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Effect of focal ischemia on long noncoding RNAs
Ashutosh Dharap1, Venkata Prasuja Nakka, Raghu Vemuganti
1Department of Neurological Surgery, University of Wisconsin, Madison, WI 53792, USA.
Stroke
|September 6, 2012
Summary
Stroke significantly impacts long noncoding RNA (lncRNA) expression in the rat brain. Researchers found numerous lncRNAs were altered after focal ischemia, suggesting a role in stroke response.
Area of Science:
- Neuroscience
- Genomics
- Molecular Biology
Background:
- Long noncoding RNAs (lncRNAs) are crucial regulators of cellular functions.
- Understanding lncRNA roles in neurological conditions like stroke is essential.
Purpose of the Study:
- To investigate the impact of focal cerebral ischemia on lncRNA expression profiles in the rat cerebral cortex.
- To identify stroke-responsive lncRNAs and explore their genomic and transcriptomic characteristics.
Main Methods:
- Induction of transient middle cerebral artery occlusion (MCAO) in rats to model focal ischemia.
- Microarray analysis to assess the expression of 8314 lncRNAs.
- Bioinformatic analysis to evaluate genomic/transcriptomic correlates and transcription factor binding sites of stroke-responsive lncRNAs.
Main Results:
- Significant alterations in lncRNA expression were observed 3-12 hours post-MCAO compared to sham controls.
- 359 lncRNAs were upregulated and 84 were downregulated.
- 62 stroke-responsive lncRNAs exhibited high sequence homology with protein-coding genes, sharing overlapping transcription factor binding sites in their promoters.
Conclusions:
- Focal cerebral ischemia profoundly alters the expression landscape of lncRNAs in the rat brain.
- Stroke-responsive lncRNAs may be co-regulated with protein-coding genes, suggesting coordinated regulatory mechanisms.
- lncRNAs identified in this study represent potential novel targets for understanding and treating stroke.
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