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Related Concept Videos

Ischemic Stroke ll: Pathophysiology01:15

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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Tolerance to ischemia - an increasingly complex biology.

Robert Meller1, Roger P Simon

  • 1Neuroscience Institute, Morehouse School of Medicine, 720 Westview Drive SW, Atlanta, GA, 30310-1495 ; Department of Neurobiology, Morehouse School of Medicine, 720 Westview Drive SW, Atlanta, GA, 30310-1495 ; Department of Pharmacology, Morehouse School of Medicine, 720 Westview Drive SW, Atlanta, GA, 30310-1495.

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Summary

Genomics studies reveal the complex nature of ischemic tolerance and preconditioning. Research is uncovering epigenetic factors influencing this protective phenomenon, highlighting the need for further investigation.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Physiology

Background:

  • Ischemic tolerance is a phenomenon where tissues become resistant to damage from lack of oxygen.
  • Preconditioning involves brief exposures to stimuli that induce tolerance.
  • Understanding the genetic basis of these processes is crucial for developing therapeutic strategies.

Purpose of the Study:

  • To review and synthesize findings from genomics studies on preconditioning and ischemic tolerance.
  • To identify common themes and challenges across different experimental models and species.
  • To highlight the emerging role of epigenetics in modulating ischemic tolerance.

Main Methods:

  • Review of published genomics studies.
  • Analysis of data from various array technologies.
  • Comparison of different preconditioning and ischemic tolerance models across species.

Main Results:

  • Genomics studies have elucidated some of the complexity underlying ischemic tolerance.
  • Diverse species, array technologies, and experimental models have been employed.
  • Epigenetic mechanisms are increasingly recognized as key regulators of preconditioning and tolerance.

Conclusions:

  • The phenomenon of ischemic tolerance is highly complex, involving intricate genomic and epigenetic regulation.
  • Current genomics research provides a foundation for understanding this complexity.
  • Further comprehensive studies are required to fully unravel the molecular underpinnings and therapeutic potential of ischemic tolerance.