Long-term measurement of cerebral blood flow and metabolism in a rat chronic hypoperfusion model.
1. Rat bilateral common carotid artery occlusion (BCAO) was used as a chronic cerebral hypoperfusion model. We observed autoradiographically the long-term changes in regional cerebral blood flow (rCBF) and regional cerebral glucose utilization (rCGU) after 2 days and 1, 4 and 8 weeks of BCAO and in controls. Regions evaluated included the cerebral cortex, white matter and basal ganglia. Pathological changes were also observed with Klüver-Barrera and haematoxylin-eosin staining. 2. After 2 days, rCBF was significantly reduced to 33-58% in the cortex, white matter and amygdala and similar reductions were observed after 1 week. 3. After 4 weeks, rCBF recovered; however, rCBF remained significantly reduced in the occipital cortex, white matter, globus pallidus and substantia nigra. 4. After 2 days, rCGU was mostly maintained but, after 1 week, rCGU was reduced significantly to 40-70% in the cortex, white matter, basal ganglia and thalamus. Four weeks later, these reductions were no longer seen. 5. Rarefaction of the white matter was observed from 1 week. 6. These results showed that the BCAO in rats is an appropriate model for chronic cerebral hypoperfusion and that uncoupling of rCBF and rCGU was observed from 2 days until 4 weeks in the white matter.
Otori
Tatsuo
T
Internal Medicine II, Nippon Medical School, Tokyo, Japan. BB1992@aol.com
Katsumata
Toshiya
T
Muramatsu
Hiromi
H
Kashiwagi
Fumihiko
F
Katayama
Yasuo
Y
Terashi
Akiro
A
D000818:Animals; D001157:Arterial Occlusive Diseases / Q000150:complications; D001345:Autoradiography; D001786:Blood Glucose / Q000378:metabolism*; D001921:Brain / Q000378:metabolism* / Q000473:pathology; D002545:Brain Ischemia / Q000209:etiology / Q000378:metabolism* / Q000473:pathology; D002340:Carotid Artery Diseases / Q000150:complications; D017536:Carotid Artery, Common; D002560:Cerebrovascular Circulation; D002908:Chronic Disease; D004195:Disease Models, Animal; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012039:Regional Blood Flow
D001786:Blood Glucose