1. TIA model is attainable in Wistar rats by intraluminal occlusion of the MCA for 10 min or shorter
- Author
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A. Durukan Tolvanen, Usama Abo-Ramadan, Eric Pedrono, Turgut Tatlisumak, Ertugrul Tatlisumak, Experimental MRI Laboratory, Biomedicum Helsinki, Helsinki, Finland, Department of Neurology, Helsinki University Central Hospital, Helsinki, Finland, Department of Anatomy, Manisa Celal Bayar University, Faculty of Medicine, Manisa, Turkey, Department of Neurology, Sahlgrenska University Hospital and Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden, Clinicum, Neurologian yksikkö, Department of Neurosciences, Medicum, and HUS Neurocenter
- Subjects
Male ,0301 basic medicine ,Pathology ,Time Factors ,Infarction ,Middle cerebral artery ,Apoptosis ,TRANSIENT ,3124 Neurology and psychiatry ,Brain Ischemia ,0302 clinical medicine ,RECEPTOR ANTAGONIST ,ARTERY OCCLUSION ,BRAIN ,Transient ischemic attack ,DELAYED INFARCTION ,Stroke ,Neurons ,medicine.diagnostic_test ,General Neuroscience ,Infarction, Middle Cerebral Artery ,Cerebral ischemia ,NEURONAL DEATH ,Cerebral blood flow ,Ischemic Attack, Transient ,FOCAL CEREBRAL-ISCHEMIA ,Cerebrovascular Circulation ,medicine.symptom ,STROKE ,medicine.medical_specialty ,Ischemia ,Lesion ,Necrosis ,03 medical and health sciences ,Magnetic resonance imaging ,medicine.artery ,medicine ,Animals ,ATTACK ,Animal model ,Artery occlusion ,TOLERANCE ,cardiovascular diseases ,Rats, Wistar ,Molecular Biology ,business.industry ,3112 Neurosciences ,medicine.disease ,Rats ,Disease Models, Animal ,030104 developmental biology ,Reperfusion ,Rat ,Neurology (clinical) ,business ,030217 neurology & neurosurgery ,Developmental Biology - Abstract
Transient ischemic attack (TIA) has received only little attention in the experimental research field. Recently, we introduced a TIA model for mice, and here we set similar principles for simulating this human condition in Wistar rats. In the model: 1) transient nature of the event is ensured, and 2) 24 h after the event animals are free from any sensorimotor deficit and from any detectable lesion by magnetic resonance imaging (MRI). Animals experienced varying durations of ischemia (5, 10, 12.5, 15, 25, and 30 min, n = 6-8 per group) by intraluminal middle cerebral artery occlusion (MCAO). Ischemia severity and reperfusion rates were controlled by cerebral blood flow measurements. Sensorimotor neurological evaluations and MRI at 24 h differentiated between TIA and ischemic stroke. Hematoxylin and eosin staining and apoptotic cell counts revealed pathological correlates of the event. We found that already 12.5 min of ischemia was long enough to induce ischemic stroke in Wistar rats. Ten min or shorter durations induced neither gross neurological deficits nor infarcts visible on MRI, but histologically caused selective neuronal necrosis. A separate group of animals with 10 min of ischemia followed up to 1 week after reperfusion remained free of infarction and any MRI signal change. Thus, 10 min or shorter focal cerebral ischemia induced by intraluminal MCAO in Wistar rats provides a clinically relevant TIA the rat. This model is useful for studying molecular correlates of TIA. (C) 2017 Elsevier B.V. All rights reserved.
- Published
- 2017