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Related Concept Videos

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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H2S Donor SPRC Ameliorates Ischemic Stroke by Upregulating CD24.

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CD24 protein can suppress neuroinflammation and enhance microglia migration in ischemic stroke. The H2S donor, S-propargyl-cysteine (SPRC), upregulates CD24, reducing inflammation and improving outcomes.

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Area of Science:

  • Neuroscience
  • Immunology
  • Biochemistry

Background:

  • Ischemic stroke causes significant mortality and morbidity, with limited treatment options.
  • Neuroinflammation is a key pathological feature of ischemic stroke, necessitating novel therapeutic targets.
  • CD24, an inflammatory suppressor in other diseases, has an unknown role in ischemic stroke.

Purpose of the Study:

  • To investigate the role of CD24 in ischemic stroke.
  • To explore the relationship between the hydrogen sulfide (H2S) donor, S-propargyl-cysteine (SPRC), and CD24 in ischemic stroke.

Main Methods:

  • In vitro and in vivo studies were conducted to examine CD24-mediated inflammation and cell migration.
  • Mechanism studies focused on the effects of SPRC on endogenous H2S levels and CD24 expression.
  • The study utilized BV2 cell models to analyze inflammatory signaling pathways.

Main Results:

  • CD24 overexpression inhibited the nuclear factor kappa B (NF-κB) pathway and promoted M2 microglia migration via the Src/Fak/Pyk2 pathway.
  • SPRC increased endogenous H2S levels via cystathionine-β-synthase (CBS), indirectly upregulating CD24.
  • These findings suggest CD24 plays a crucial role in mitigating neuroinflammation post-stroke.

Conclusions:

  • CD24 is a potential therapeutic target for inhibiting neuroinflammation in ischemic stroke.
  • SPRC alleviates ischemic stroke inflammation by modulating the CD24/Iκ-Bα/NF-κB pathway.
  • SPRC enhances M2 microglia migration via the CD24/Src/Fak/Pyk2 pathway, reducing lesion inflammation.