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Related Concept Videos

Cellular Injury IlI: Cellular Death01:11

Cellular Injury IlI: Cellular Death

Cell death is the irreversible loss of cellular structure and function, representing the final stage of severe injury. It plays a key role in both normal physiology and disease.Types of Cell DeathThe two main types are necrosis and apoptosis, though others like necroptosis and pyroptosis also exist.Necrosis:Necrosis is an unregulated form of cell death caused by severe injury such as trauma, toxins, or ischemia. It is characterized by cell swelling, membrane loss, rupture, and leakage of...
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Necrosis is a form of irreversible cell death caused by severe injury such as ischemia, toxins, or trauma. Unlike programmed cell death, it is an uncontrolled, pathological process that typically provokes inflammation in surrounding tissues.Pathophysiologic ChangesNecrosis begins when cells sustain critical damage, leading to swelling of organelles, particularly mitochondria, and rapid ATP depletion. As energy levels decline, membrane ion pumps fail, leading to calcium influx and eventually,...
Ischemic Stroke l: Introduction01:15

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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.
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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Related Experiment Video

Updated: Jul 12, 2026

2-Vessel Occlusion/Hypotension: A Rat Model of Global Brain Ischemia
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IKK mediates ischemia-induced neuronal death.

Oliver Herrmann1, Bernd Baumann, Rossana de Lorenzi

  • 1Department of Neurology, University of Heidelberg, Im Neuenheimer Feld 400, 69120 Heidelberg, Germany.

Nature Medicine
|November 16, 2005
PubMed
Summary

IkappaB kinase (IKK) is activated during stroke and contributes to brain damage. Inhibiting IKK in neurons reduces stroke injury, suggesting IKK inhibitors may be a potential stroke therapy.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Pathology

Background:

  • The IkappaB kinase (IKK) complex regulates NF-kappaB-dependent gene transcription.
  • The role of IKK in the brain, particularly during ischemic events like stroke, remains largely uncharacterized.

Purpose of the Study:

  • To investigate the function of IKK in the context of ischemic brain damage.
  • To determine the therapeutic potential of targeting IKK in stroke models.

Main Methods:

  • Generated genetically modified mice with neuron-specific deletion or inhibition of IKK.
  • Administered a selective small-molecule IKK inhibitor in a mouse stroke model.
  • Assessed infarct size and cell death post-ischemia.

Main Results:

  • IKK was activated in a mouse model of stroke.
  • Genetic inhibition of IKK in neurons significantly reduced infarct size.
  • Constitutive activation of IKK2 exacerbated ischemic brain damage.
  • Pharmacological inhibition of IKK reduced infarct volume and cell death within a 4.5-hour therapeutic window.

Conclusions:

  • IKK plays a critical role in mediating ischemic brain damage.
  • Targeting IKK with inhibitors presents a promising therapeutic strategy for stroke treatment.