Increased hemorrhagic transformation and altered infarct size and localization after experimental stroke in a rat model type 2 diabetes

Adviye Ergul, Mostafa M. Elgebaly, Mary Louise Middlemore, Weiguo Li, Hazem Elewa, Jeffrey A Switzer, Christiana Hall, Anna Kozak, Susan C. Fagan

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Abstract

Background: Interruption of flow through of cerebral blood vessels results in acute ischemic stroke. Subsequent breakdown of the blood brain barrier increases cerebral injury by the development of vasogenic edema and secondary hemorrhage known as hemorrhagic transformation (HT). Diabetes is a risk factor for stroke as well as poor outcome of stroke. The current study tested the hypothesis that diabetes-induced changes in the cerebral vasculature increase the risk of HT and augment ischemic injury. Methods: Diabetic Goto-Kakizaki (GK) or control rats underwent 3 hours of middle cerebral artery occlusion and 21 h reperfusion followed by evaluation of infarct size, hemorrhage and neurological outcome. Results: Infarct size was significantly smaller in GK rats (10 ± 2 vs 30 ± 4%, p < 0.001). There was significantly more frequent hematoma formation in the ischemic hemisphere in GK rats as opposed to controls. Cerebrovascular tortuosity index was increased in the GK model (1.13 ± 0.01 vs 1.34 ± 0.06, P < 0.001) indicative of changes in vessel architecture. Conclusion: These findings provide evidence that there is cerebrovascular remodeling in diabetes. While diabetes-induced remodeling appears to prevent infarct expansion, these changes in blood vessels increase the risk for HT possibly exacerbating neurovascular damage due to cerebral ischemia/reperfusion in diabetes.

Original languageEnglish (US)
Article number33
JournalBMC Neurology
Volume7
DOIs
StatePublished - Oct 15 2007

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Type 2 Diabetes Mellitus
Stroke
Reperfusion
Blood Vessels
Hemorrhage
Middle Cerebral Artery Infarction
Wounds and Injuries
Brain Ischemia
Blood-Brain Barrier
Hematoma
Edema

ASJC Scopus subject areas

  • Clinical Neurology

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Increased hemorrhagic transformation and altered infarct size and localization after experimental stroke in a rat model type 2 diabetes. / Ergul, Adviye; Elgebaly, Mostafa M.; Middlemore, Mary Louise; Li, Weiguo; Elewa, Hazem; Switzer, Jeffrey A; Hall, Christiana; Kozak, Anna; Fagan, Susan C.

In: BMC Neurology, Vol. 7, 33, 15.10.2007.

Research output: Contribution to journalArticle

Ergul, Adviye ; Elgebaly, Mostafa M. ; Middlemore, Mary Louise ; Li, Weiguo ; Elewa, Hazem ; Switzer, Jeffrey A ; Hall, Christiana ; Kozak, Anna ; Fagan, Susan C. / Increased hemorrhagic transformation and altered infarct size and localization after experimental stroke in a rat model type 2 diabetes. In: BMC Neurology. 2007 ; Vol. 7.
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AU - Elgebaly, Mostafa M.

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AU - Elewa, Hazem

AU - Switzer, Jeffrey A

AU - Hall, Christiana

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AU - Fagan, Susan C.

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