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Ischemic Stroke ll: Pathophysiology01:15

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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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Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
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17β-estradiol and inflammation: implications for ischemic stroke.

Ashley B Petrone1, James W Simpkins2, Taura L Barr3

  • 1Center for Neuroscience, West Virginia University School of Medicine, WV 26506, USA ; Center for Basic and Translational Stroke Research, West Virginia University School of Medicine, WV 26506, USA.

Aging and Disease
|October 3, 2014
PubMed
Summary

Estrogen, particularly 17-beta-estradiol, offers neuroprotection against ischemic stroke by modulating the immune response. Understanding this action may lead to new stroke and inflammatory disease treatments.

Keywords:
estrogenimmune responseinflammationischemianeuroprotectionstroke

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Area of Science:

  • Neuroscience
  • Immunology
  • Endocrinology

Background:

  • Estrogens are known for reproductive functions but also impact the central nervous system.
  • Pre-clinical studies indicate 17-beta-estradiol (17β-E2) provides neuroprotection against ischemic stroke.
  • 17β-E2 influences neuroprotective pathways and modulates immune responses in stroke.

Purpose of the Study:

  • To review the immune response to ischemic stroke.
  • To examine sex differences in stroke pathophysiology.
  • To elucidate the role of estrogen as an immunomodulator.

Main Methods:

  • Literature review focusing on 17-beta-estradiol (17β-E2).
  • Comparison of 17β-E2 with other estrogen forms.
  • Summary of immune responses and sex differences in stroke.

Main Results:

  • Estrogen, specifically 17β-E2, demonstrates neuroprotective effects in ischemic stroke models.
  • 17β-E2 activates neuroprotective pathways and influences local/systemic immune responses.
  • Significant sex differences exist in stroke pathophysiology, partly mediated by estrogen.

Conclusions:

  • Estrogen's immunomodulatory actions are crucial in stroke.
  • Understanding estrogen's role offers potential therapeutic strategies for stroke.
  • Estrogen-based therapies may benefit other inflammatory diseases.