Characterization of the pattern of ischemic stroke induced by artificial particle embolization in the rat brain

Ming Jun Tsai, Yi Hung Tsai, Yu-Min Kuo

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Embolism is responsible for half of cerebral infarctions, yet few animal models were developed due to the unpredictability of the embolus-induced infarcts. We manufactured artificial embolic particles by blending chitin and poly(d,l-Lactide-co-glycolide) (chitin/PLGA) for their good biocompatibility and rapid hydration expansion property. We subdivided the chitin/PLGA microparticles into 10 size groups (from 38-45 μm to 255-350 μm) and injected them through the external carotid artery toward the bifurcation of the common carotid artery in the rat. Reduced blood flow of the ipsilateral hemisphere was evident immediately after the injection of particles. The spherical appearance of the particle was critical in occluding the cerebral vessels. Particle212-250μm produced the greatest diffuse infarction in the ipsilateral hemisphere, including the cortex, hippocampus, basal ganglion, thalamus, midbrain and cerebellum. Particle75-90μm induced single or sparse isolated infarcts mainly located in the subcortical region, resembling lacunar stroke observed in humans. Particle38-45μm frequently crossed to the contralateral hemisphere and induced diffuse infarctions in both hemispheres. The cortex infarct volumes were positively correlated to neurologic score and seizure incidence. In conclusion, we have established embolic stroke animal models, including a novel model that mainly expresses lacunar infarction, by intravenous injection of chitin/PLGA microparticles.

Original languageEnglish
Pages (from-to)6381-6388
Number of pages8
JournalBiomaterials
Volume32
Issue number27
DOIs
Publication statusPublished - 2011 Sep 1

Fingerprint

Chitin
Rats
Brain
Stroke
Lacunar Stroke
Embolism
Infarction
Animals
Animal Models
External Carotid Artery
Common Carotid Artery
Cerebral Infarction
Mesencephalon
Basal Ganglia
Thalamus
Biocompatibility
Intravenous Injections
Hydration
Cerebellum
Nervous System

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Ceramics and Composites
  • Biophysics
  • Biomaterials
  • Mechanics of Materials

Cite this

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title = "Characterization of the pattern of ischemic stroke induced by artificial particle embolization in the rat brain",
abstract = "Embolism is responsible for half of cerebral infarctions, yet few animal models were developed due to the unpredictability of the embolus-induced infarcts. We manufactured artificial embolic particles by blending chitin and poly(d,l-Lactide-co-glycolide) (chitin/PLGA) for their good biocompatibility and rapid hydration expansion property. We subdivided the chitin/PLGA microparticles into 10 size groups (from 38-45 μm to 255-350 μm) and injected them through the external carotid artery toward the bifurcation of the common carotid artery in the rat. Reduced blood flow of the ipsilateral hemisphere was evident immediately after the injection of particles. The spherical appearance of the particle was critical in occluding the cerebral vessels. Particle212-250μm produced the greatest diffuse infarction in the ipsilateral hemisphere, including the cortex, hippocampus, basal ganglion, thalamus, midbrain and cerebellum. Particle75-90μm induced single or sparse isolated infarcts mainly located in the subcortical region, resembling lacunar stroke observed in humans. Particle38-45μm frequently crossed to the contralateral hemisphere and induced diffuse infarctions in both hemispheres. The cortex infarct volumes were positively correlated to neurologic score and seizure incidence. In conclusion, we have established embolic stroke animal models, including a novel model that mainly expresses lacunar infarction, by intravenous injection of chitin/PLGA microparticles.",
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Characterization of the pattern of ischemic stroke induced by artificial particle embolization in the rat brain. / Tsai, Ming Jun; Tsai, Yi Hung; Kuo, Yu-Min.

In: Biomaterials, Vol. 32, No. 27, 01.09.2011, p. 6381-6388.

Research output: Contribution to journalArticle

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