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Related Concept Videos

Intracellular Signaling Affects Focal Adhesions01:17

Intracellular Signaling Affects Focal Adhesions

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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
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Ischemic Stroke l: Introduction01:15

Ischemic Stroke l: Introduction

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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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Ischemic Stroke ll: Pathophysiology01:15

Ischemic Stroke ll: Pathophysiology

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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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Cerebral Edema ll: Pathophysiology01:22

Cerebral Edema ll: Pathophysiology

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Vasogenic edema is a major form of cerebral edema characterized by abnormal accumulation of fluid in the brain’s extracellular space due to disruption of the blood–brain barrier (BBB). The BBB is a specialized structure composed of endothelial cells connected by tight junctions, supported by astrocytic endfeet and a basement membrane. Under normal conditions, it tightly regulates the movement of ions, proteins, and solutes between the bloodstream and brain parenchyma. When this...
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Hemorrhagic Stroke ll: Pathophysiology01:29

Hemorrhagic Stroke ll: Pathophysiology

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A hemorrhagic stroke develops when a cerebral blood vessel ruptures, allowing blood to escape into the surrounding brain tissue, as in intracerebral hemorrhage (ICH), or into the subarachnoid space, as in subarachnoid hemorrhage (SAH). Because the skull is a rigid compartment, the sudden presence of extravascular blood rapidly increases intracranial pressure and compresses adjacent neural structures, leading to immediate tissue injury and impaired cerebral perfusion.Mass Effect and Primary...
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Activation of Integrins01:15

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Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
In "outside-in signaling," external factors in the extracellular space bind to exposed ligand binding sites on integrins. This causes the inactive protein to undergo a conformational change to become active. Integrins are often clustered on the cell membrane. Repetitive and regularly spaced ligand binding...
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Related Experiment Video

Updated: Apr 23, 2026

Isolation of Primary Murine Brain Microvascular Endothelial Cells
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Brain endothelial cell specific integrins and ischemic stroke.

Kathleen Guell1, Gregory J Bix

  • 1Department of Anatomy and Neurobiology, University of Kentucky, Sanders Brown Building 800 South Limestone, Lexington, Kentucky 40508, USA.

Expert Review of Neurotherapeutics
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Summary

Ischemic stroke causes brain damage after blood vessel recanalization. Endothelial cell integrin matrix receptors are key to the brain

Keywords:
blood–brain barrierendothelialextracellular matrixintegrinsstroke

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A Triple Primary Cell Culture Model of the Human Blood-Brain Barrier for Studying Ischemic Stroke In Vitro
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Area of Science:

  • Neuroscience
  • Vascular Biology
  • Cell Biology

Background:

  • Ischemic stroke, caused by blocked brain blood vessels, leads to significant morbidity despite reduced mortality.
  • Post-recanalization secondary damage, including blood-brain barrier breakdown, edema, and inflammation, is a major clinical challenge.
  • The brain attempts self-repair via angiogenic growth factors, particularly in the ischemic penumbra, a potential therapeutic target.

Purpose of the Study:

  • To elucidate the role of endothelial cell integrin matrix receptors in the brain's response to ischemic injury.
  • To explore the therapeutic potential of targeting these receptors for improved stroke outcomes.

Main Methods:

  • Analysis of recent studies focusing on the post-stroke angiogenic response in the ischemic penumbra.
  • Investigation of brain endothelial cell behavior and interactions with the extracellular matrix.

Main Results:

  • Endothelial cell integrin matrix receptors are implicated in moderating cellular responses following ischemic brain injury.
  • These receptors play a significant role in the brain's angiogenic and repair mechanisms post-stroke.

Conclusions:

  • Targeting endothelial cell integrin matrix receptors represents a promising therapeutic strategy to mitigate secondary damage after ischemic stroke.
  • Further research into these receptors could lead to novel treatments for improving recovery and reducing long-term disability from stroke.