Regional [14C]palmitate incorporation into the hippocampus after transient cerebral ischemia in awake gerbils.
Incorporation of plasma [14C]palmitate into the hippocampus was measured using quantitative autoradiography and a ratio method of analysis between 10 min and 7 days after 5 min of bilateral occlusion of the common carotid arteries in awake gerbils. One day after carotid occlusion, relative palmitate incorporation was elevated by 16% and 20%, respectively (p less than 0.01), in the CA4 pyramidal cell layer and dentate gyrus of the hippocampus as compared with sham-operated animals. At 3 days, significant elevations of this magnitude were found in the CA3 and CA4 cell layers, and relative incorporation was reduced by 26% in the CA1 pyramidal cell layer. At 7 days, the only significant difference from control was a 15% elevated incorporation in the CA3 pyramidal cell layer. The results suggest that the turnover of palmitate-containing lipids is retained in the CA1 pyramidal layer of the gerbil hippocampus for 1 day and then reduced at 3 days after 5-min ischemia and that lipid synthesis is stimulated in hippocampal regions affected by but recovering from an ischemic insult (CA3, CA4, dentate gyrus).
Tone
O
O
Department of Neurosurgery, Tokyo Medical and Dental University, School of Medicine, Japan.
Matsushima
Y
Y
Inaba
Y
Y
Rapoport
S I
SI
D000818:Animals; D002545:Brain Ischemia / Q000378:metabolism* / Q000473:pathology; D002470:Cell Survival; D005849:Gerbillinae; D006624:Hippocampus / Q000378:metabolism* / Q000473:pathology; D008297:Male; D019308:Palmitic Acid; D010169:Palmitic Acids / Q000378:metabolism*; D013997:Time Factors; D014851:Wakefulness
D010169:Palmitic Acids; D019308:Palmitic Acid