Mechanisms of perinatal arterial ischemic stroke

David Fernández-López1, Niranjana Natarajan2, Stephen Ashwal3

  • 1Department of Neurology, University of California San Francisco, San Francisco, California, USA.

Insights

Perinatal stroke causes significant long-term neurologic deficits. This review details the unique pathophysiology of neonatal brain injury and discusses emerging treatments for perinatal stroke.

Area of Science:

  • Neurology
  • Neonatal Medicine
  • Developmental Neuroscience

Background:

  • Perinatal stroke incidence is high, comparable to the elderly.
  • It leads to severe long-term neurologic and cognitive deficits, including cerebral palsy and epilepsy.
  • Neonatal brain damage pathophysiology is multifactorial and age-dependent.

Purpose of the Study:

  • To review fundamental clinical aspects of perinatal stroke.
  • To discuss recent findings on neonatal brain injury mechanisms.
  • To explore translational strategies and repair treatments for neonatal stroke.

Main Methods:

  • Review of emerging clinical data.
  • Analysis of experimental models of cerebral ischemia in neonatal rodents.
  • Synthesis of recent findings on cellular susceptibility, cell death, and blood-brain barrier responses.

Main Results:

  • The neonatal brain exhibits unique age-dependent responses to hypoxia-ischemia and focal arterial stroke.
  • Understanding of neuronal cell death dynamics, blood-brain barrier responses, and inflammation in neonatal stroke is advancing.
  • Long-term effects on angiogenesis and neurogenesis are being investigated.

Conclusions:

  • Perinatal stroke is a complex condition with unique neonatal pathophysiology.
  • Further research into cellular mechanisms and blood-brain barrier dynamics is crucial.
  • Translational strategies and therapeutic interventions are under development to improve outcomes.

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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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.
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Hemorrhagic Stroke ll: Pathophysiology01:29

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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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Transient Ischemic Attack l: Introduction01:26

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A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
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Stroke: Introduction and Types01:29

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A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
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