Acute characterization of tissue and functional deficits in a clinically translatable pig model of ischemic stroke
Autor: | Hea Jin Park, Franklin D. West, Xi Fang, Elizabeth S. Waters, Julie Jeon, Soo K. Shin, Kylee J. Duberstein, Simon R. Platt, Holly A. Kinder, Madison M. Fagan, Kelly M. Scheulin, Erin E. Kaiser |
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Rok vydání: | 2019 |
Předmět: |
medicine.medical_specialty
medicine.diagnostic_test business.industry Magnetic resonance imaging 030204 cardiovascular system & hematology medicine.disease Pathophysiology Open field White matter 03 medical and health sciences 0302 clinical medicine Immune system medicine.anatomical_structure Midline shift Internal medicine Fractional anisotropy medicine Cardiology cardiovascular diseases business Stroke 030217 neurology & neurosurgery |
Popis: | The acute stroke phase is a critical time frame used to evaluate stroke severity, therapeutic options, and prognosis while also serving as a major target for the development of diagnostics. To better understand stroke pathophysiology and to enhance the development of treatments, our group developed a translational pig ischemic stroke model. In this study, the evolution of acute ischemic stroke tissue damage, immune response, and functional deficits were further characterized in the pig model. Stroke was induced by middle cerebral artery occlusion in Landrace pigs. At 24 hours post-stroke, magnetic resonance imaging revealed a decrease in ipsilateral diffusivity and an increase in hemispheric swelling and intracranial hemorrhage resulting in notable midline shift. Stroke negatively impacted white matter integrity leading to decreased fractional anisotropy. Similar to acute clinical patients, stroked pigs showed a reduction in circulating lymphocytes and a surge in neutrophils and band cells. Functional responses corresponded with structural changes with reduced exploration in open field testing and impairments in spatiotemporal gait parameters. This novel, acute ischemia characterization provides important insights into tissue and functional level changes in a pig model that can be used to identify treatment targets and future testing of therapeutics and diagnostics. |
Databáze: | OpenAIRE |
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