SEASONAL DEPENDENCE OF THE ACTIVITY OF ANTIOXIDANT DEFENSE ENZYMES IN THE GROUND-SQUIRREL (CITELLUS-CITELLUS) - THE EFFECT OF COLD

被引:25
作者
BUZADZIC, B [1 ]
SPASIC, MB [1 ]
SAICIC, ZS [1 ]
RADOJICIC, R [1 ]
PETROVIC, VM [1 ]
机构
[1] FAC SCI BELGRADE, INST PHYSIOL & BIOCHEM, BELGRADE, YUGOSLAVIA
来源
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY | 1992年 / 101卷 / 04期
关键词
D O I
10.1016/0305-0491(92)90336-P
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
1. The activity of antioxidant defense enzymes (SOD, CAT, GSH-Px and GST) was analysed during the autumn and winter in the ground squirrel adapted to 30-degrees-C and subsequently exposed to cold for 6 and 24 hr. 2. The liver CAT activity as well as the IBAT CAT and GSH-Px activities differed between animals adapted to 30-degrees-C, studied in autumn, and those studied in winter. 3. MnSOD activity in the liver was increased in autumn but decreased in winter after 6 hr cold exposure reaching the control level 24 hr later. Cold exposure induced a decrease in CAT activity (except after 24 hr cold exposure in winter) and an increase in GSH-Px activity. Lower GST activity was found after 24 hr exposure to cold in winter. 4. The IBAT SOD activity decreased under the influence of cold during both seasons with a tendency to return to the control level only in winter. Cold exposure produced a decrease in GST in both seasons and CAT activity in autumn. GSH-Px activity was increased in winter only. 5. The results indicate a seasonal dependence of the activity of antioxidant defence enzymes in the ground squirrel. Seasonal influence was evidenced in animals exposed to cold as well.
引用
收藏
页码:547 / 551
页数:5
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