Long noncoding RNA H19 knockdown promotes angiogenesis via IMP2 after ischemic stroke

Area of Science:

• Neuroscience
• Molecular Biology
• Biochemistry

Background:

• Cerebral ischemia/reperfusion (I/R) injury poses a significant threat to neurological health.
• Long noncoding RNA H19 (lncRNA H19) plays a role in various biological processes, including response to injury.

Purpose of the Study:

• To investigate the impact of lncRNA H19 knockdown on angiogenesis and blood-brain barrier (BBB) integrity post-cerebral I/R injury.
• To elucidate the regulatory mechanisms underlying these effects.

Main Methods:

• Established a middle cerebral artery occlusion/reperfusion model in rodents.
• Assessed infarct volume and neurological deficits.
• Utilized western blotting, immunofluorescence, and bioinformatics to analyze protein expression and predict lncRNA targets.
• Conducted rescue experiments to validate mechanisms.

Main Results:

• H19 knockdown significantly reduced infarct volume and improved neurological function.
• Silencing H19 mitigated BBB damage and promoted endothelial cell proliferation.
• Insulin-like growth factor 2 mRNA-binding protein 2 (IMP2) was identified as a target of lncRNA H19.
• IMP2 inhibition reversed the protective effects of H19 knockdown.

Conclusions:

• Downregulation of lncRNA H19 promotes angiogenesis and reduces BBB damage.
• This protective effect is mediated through the regulation of IMP2.
• Targeting lncRNA H19 represents a potential therapeutic strategy for cerebral I/R injury.