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MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns (non-coding regions of a gene) or intergenic regions (stretches of DNA present between genes). Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself, forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA...

MicroRNAs

MicroRNAs

MicroRNA (miRNA) are short, regulatory RNA transcribed from introns—non-coding regions of a gene—or intergenic regions—stretches of DNA present between genes. Several processing steps are required to form biologically active, mature miRNA. The initial transcript, called primary miRNA (pri-mRNA), base-pairs with itself forming a stem-loop structure. Within the nucleus, an endonuclease enzyme, called Drosha, shortens the stem-loop structure into hairpin-shaped pre-miRNA. After the pre-miRNA ends...

Ischemic Stroke ll: Pathophysiology

Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...

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Related Experiment Video

Updated: May 18, 2026

Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model

Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model

Published on: June 20, 2025

MicroRNA and cerebral ischemia.

Yu Zhang¹, Jun Guo

¹Nanjing Medical University, Nanjing, China.

Zhongguo Yi Xue Ke Xue Yuan Xue Bao. Acta Academiae Medicinae Sinicae

|September 8, 2012

Summary

MicroRNAs (miRNAs) regulate gene translation and are crucial in brain function and disease. Understanding specific miRNA roles in cerebral ischemia offers new therapeutic strategies for brain injury.

Area of Science:

Neuroscience
Molecular Biology
Genetics

Background:

MicroRNAs (miRNAs) are conserved RNA molecules regulating gene translation.
They are vital for neuronal development, differentiation, and metabolism.
miRNAs are implicated in central nervous system disorders, including cerebral ischemia.

Purpose of the Study:

To explore the role of specific miRNAs in the context of focal cerebral ischemia.
To elucidate the mechanisms by which miRNAs influence neuronal survival and regeneration post-ischemia.
To identify potential miRNA-based therapeutic targets for ischemic brain injury.

Main Methods:

Analysis of miRNA expression profiles in the central nervous system.
Investigating the impact of specific miRNA alterations on target gene expression.

Related Experiment Videos

Last Updated: May 18, 2026

Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model

Isolation and Flow Cytometric Assessment of Neuroimmune Interactions in a Mini-Stroke Murine Model

Published on: June 20, 2025

Studying miRNA involvement in neuronal apoptosis and regeneration pathways.

Main Results:

Specific miRNAs are altered following focal cerebral ischemia.
These miRNA changes affect target gene expression, influencing neuronal apoptosis.
Evidence suggests miRNAs contribute to neuronal regeneration after ischemic events.

Conclusions:

MicroRNAs play a significant role in the brain's response to ischemic injury.
Targeting specific miRNAs presents a novel gene-level strategy for preventing and treating ischemic cerebral damage.
Further understanding of miRNA mechanisms can advance diagnostics and therapeutics for stroke.