Diethyldithiocarbamate, a superoxide dismutase inhibitor, counteracts the maturation of ischemic-like lesions caused by endothelin-1 intrastriatal injection.
The effects of a focal lesion induced by endothelin-1 (ET-1, 0.8 microgram/0.8 microliter) on superoxide dismutase (SOD) were studied in the neostriatum of male rats. SOD activity was analyzed at several time intervals (5, 20, 60 min, 4, 24 h and 7 days) after the lesion. No significant changes were observed early after the injection, but SOD activity started to rise significantly at the 60-min time interval reaching a peak 24 h after the injection. In a second experiment the volume of ET-1-induced lesion was evaluated following treatments which induce variations of SOD activity. ET-1 caused a large lesion (9.20 +/- 1.32 mm3) in the neostriatum 24 h after the injection that was 3-fold greater than that observed 1 h after. Rats treated with the SOD inhibitor diethyldithiocarbamate showed a lesion equivalent to that observed 1 h after ET-1 injection, suggesting that SOD may be involved in the maturation of ET-1-induced neuronal damage.
Biagini
G
G
Department of Biomedical Sciences, University of Modena, Italy.
Sala
D
D
Zini
I
I
D000818:Animals; D002545:Brain Ischemia / Q000139:chemically induced* / Q000473:pathology; D004050:Ditiocarb / Q000494:pharmacology*; D016232:Endothelins / Q000494:pharmacology*; D007150:Immunohistochemistry; D008297:Male; D017072:Neostriatum / Q000187:drug effects / Q000473:pathology; D051381:Rats; D017207:Rats, Sprague-Dawley; D012965:Sodium Chloride / Q000494:pharmacology; D013482:Superoxide Dismutase / Q000037:antagonists & inhibitors; D013997:Time Factors
D016232:Endothelins; D012965:Sodium Chloride; D004050:Ditiocarb; D013482:Superoxide Dismutase