TY - JOUR
T1 - Hypertension-induced vascular remodeling contributes to reduced cerebral perfusion and the development of spontaneous stroke in aged SHRSP rats
AU - Henning, Erica C.
AU - Warach, Steven
AU - Spatz, Maria
PY - 2010/4
Y1 - 2010/4
N2 - Stroke in spontaneously-hypertensive, stroke-prone (SHRSP) rats is of particular interest because the pathogenesis is believed to be similar to that in the clinical setting. In this study, we employed multi-modal MRIASL, DWI, T"2, GRE, T"1 (prepost contrast)to investigate the natural history of spontaneous cerebral infarction and the specific role of cerebral perfusion in disease development. Twelve female SHRSP rats (age: ∼1 year) were imaged within 1 to 3 days of symptom onset. The distribution of ischemic lesions was the following: 28.1 visual, 21.9 striatal, 18.8 motorsensory, 12.5 thalamic, 12.5 auditory, 3.1 frontalprelimbic, and 3.1 multiple areas. Ischemic lesions had significantly reduced blood flow in comparison with healthy tissue. Ischemic lesions were characterized by hyperplastic, thrombosed, and compressed vessels. These findings suggest that ischemic lesion development is related to hypertension-induced vascular remodeling and persistent hypoperfusion. This model should be useful for studying the relationship between chronic hypertension and subsequent stroke, both in terms of primary and secondary prevention.
AB - Stroke in spontaneously-hypertensive, stroke-prone (SHRSP) rats is of particular interest because the pathogenesis is believed to be similar to that in the clinical setting. In this study, we employed multi-modal MRIASL, DWI, T"2, GRE, T"1 (prepost contrast)to investigate the natural history of spontaneous cerebral infarction and the specific role of cerebral perfusion in disease development. Twelve female SHRSP rats (age: ∼1 year) were imaged within 1 to 3 days of symptom onset. The distribution of ischemic lesions was the following: 28.1 visual, 21.9 striatal, 18.8 motorsensory, 12.5 thalamic, 12.5 auditory, 3.1 frontalprelimbic, and 3.1 multiple areas. Ischemic lesions had significantly reduced blood flow in comparison with healthy tissue. Ischemic lesions were characterized by hyperplastic, thrombosed, and compressed vessels. These findings suggest that ischemic lesion development is related to hypertension-induced vascular remodeling and persistent hypoperfusion. This model should be useful for studying the relationship between chronic hypertension and subsequent stroke, both in terms of primary and secondary prevention.
KW - ASL
KW - Hypertension
KW - MRI
KW - Perfusion
KW - SHRSP
KW - Stroke
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U2 - 10.1038/jcbfm.2009.246
DO - 10.1038/jcbfm.2009.246
M3 - Article
C2 - 19953101
AN - SCOPUS:77950519189
SN - 0271-678X
VL - 30
SP - 827
EP - 836
JO - Journal of Cerebral Blood Flow and Metabolism
JF - Journal of Cerebral Blood Flow and Metabolism
IS - 4
ER -