Related Experiment Video
Updated: Jun 13, 2026
11:32
Evaluating Cell Death Signaling by Immunofluorescence in a Rat Model of Ischemic Stroke
Published on: January 3, 2025
Matrix metalloproteinases in cerebral ischemia.
Hahn Young Kim1, Seol-Heui Han
1Department of Neurology, Konkuk University Hospital, Center for Geriatric Neuroscience Research, Institute of Biomedical Science and Technology, Konkuk University, Seoul, Korea.
Journal of Clinical Neurology (Seoul, Korea)
|April 17, 2010
Summary
Matrix metalloproteinases (MMPs) are crucial in brain injury, impacting the blood-brain barrier and neuroinflammation. Their role shifts from damaging to beneficial, influencing recovery and regeneration based on injury stage.
Area of Science:
- Neuroscience
- Biochemistry
Background:
- Matrix metalloproteinases (MMPs) are implicated in central nervous system diseases.
- Shared pathogeneses include blood-brain barrier (BBB) disruption, neuroinflammation, oxidative stress, and extracellular matrix (ECM) remodeling.
Purpose of the Study:
- To elucidate the dual role of MMPs in the context of brain injury.
- To understand MMPs' involvement in BBB integrity and ECM remodeling during different injury phases.
Main Methods:
- Review of existing literature on MMPs in CNS diseases.
- Analysis of MMPs' functions in early ischemic injury and tissue recovery phases.
Main Results:
- MMPs contribute to BBB disruption in early ischemic injury by degrading capillary basal lamina and ECM, causing edema and hemorrhage.
- MMPs are essential for ECM remodeling, crucial for tissue recovery and modulating neuronal death versus regeneration.
Conclusions:
- MMPs exhibit a 'double-edged sword' effect in brain injury.
- Their role is context-dependent, being either deleterious or beneficial based on the specific stage of the injury and repair process.
Related Concept Videos
01:23Role of Matrix Metalloproteases in Degradation of ECM
Matrix metalloproteases (MMPs) are enzymes involved in the hydrolysis of proteins and glycoproteins of the extracellular matrix. MMPs are essential for the migration and proliferation of cells through the dense matrix network, throughout embryonic development, and throughout morphogenesis. The first MMP activity discovered was a collagenase in a tadpole's tail undergoing metamorphosis. The active collagen deposition and modifications lead to the morphogenesis of tadpoles into the adult body.
A...
A...
01:15Ischemic 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...