Marked changes in erythrocyte antioxidants and lipid peroxidation levels of rats exposed to acute, repeated and chronic restraint stress.
The aim of this study was to investigate the effects of acute, repeated and chronic restraint stress on the antioxidant status and lipid peroxidation. For this purpose, 48 male Wistar rats, aged three months were used in this study. Rats were separated into six groups as follows; control (C), acute stress (AS), restrained for 7 days (1 h/day) (RS), restrained for 21 days (1 h/day) (CS1), restrained for 28 days (1 h/day) (CS2) and restrained for 21 days (1 h/day) and allowed to recovery for 7 days (CS3). Copper, zinc-superoxide dismutase (Cu, Zn-SOD), catalase (CAT) and selenium-dependent glutathione peroxidase (Se-GSH-Px) activities, corticosterone, reduced glutathione (GSH) and thiobarbituric acid-reactive substances (TBARS) levels were measured in blood samples. Corticosterone levels of all groups were found to be elevated after stress compared to group C. Cu, Zn-SOD activity was lower in all stress groups than in group C. CAT and Se-GSH-Px activities were increased in all stress groups. All stress models decreased GSH levels except for the CS3 group. TBARS levels were higher in stress groups than in C group except for AS group. The highest corticosterone level, CAT and Se-GSH-Px activity and TBARS level were seen in group RS. The lowest Cu, Zn-SOD activity and GSH level were seen in group CS2. These results may have an important implication for impaired erythrocyte antioxidant enzyme activities and glutathione levels resulting from exposure to different stress models (acute, repeated and chronic restraint stress).
Sahin
E
E
Department of Biochemistry, Faculty of Medicine, Akdeniz University, Antalya, Turkey.
Gümüşlü
S
S
Oztürk
O
O
Abidin
I
I
Yargiçoğlu
P
P
Ağar
A
A
D000818:Animals; D000975:Antioxidants / Q000378:metabolism*; D002374:Catalase / Q000378:metabolism; D002908:Chronic Disease; D003345:Corticosterone / Q000097:blood; D004912:Erythrocytes / Q000187:drug effects / Q000378:metabolism*; D005978:Glutathione / Q000378:metabolism; D005979:Glutathione Peroxidase / Q000378:metabolism; D007457:Iodine Radioisotopes; D015227:Lipid Peroxidation / Q000187:drug effects*; D008297:Male; D051381:Rats; D017208:Rats, Wistar; D012149:Restraint, Physical; D013315:Stress, Psychological / Q000097:blood*; D013482:Superoxide Dismutase / Q000378:metabolism; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism
D000975:Antioxidants; D007457:Iodine Radioisotopes; D017392:Thiobarbituric Acid Reactive Substances; D002374:Catalase; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase; D005978:Glutathione; D003345:Corticosterone