Abstract

In order to investigate the liver damage and hepatic protective systems in cadmium(Dd) administered rats, five different levels of Cd were injected intraperitoneally to male rats of sprague-Dawley strains weighing $250{\pm}15g.$ Levels of daily Cd administration were 0(control), 0.625(A), 1.25(B), 2.5(C) and 5mg(D)/kg of body weight and single inhection per day was done for consecutive two days. With increasing Cd dosed, serum glutamic oxaloacetic transaminase, glutamic pyruvic transaminase and alkaline phosphatase activities were increased. And at the same time, hepatic reduced glutathione contents were decreased, whereas the levels of oxidized form were increased. Liver lipid peroxide levels of A, B, C and D groups were 1.1, 1.5, 1.8 activities and vitamin E contents were progressively reduced in accordance with the increase in Cd dose. However, liver superoxide dismutase activities were not different between control and A group although it was higher in B and lower in C and D groups compared with control.

흰쥐에 Cd를 투여했을때 Cd 투여농도에 따라 간조직내의 과산화적 손상과 그 방어계를 관찰하기 위해서 $250{\pm}15g.$ 되는 sprague-Dawley종 수컷에 0(control), 0.625(A군), 1.25(B군), 2.5(C군), 5mg(D군) $Cd^{++}/kg$ of body wt를 24시간 간격으로 2회 투여한 후 혈청중 GOT, GPT, AL-pase 활성측정, 간조직중의 SOD, GPX, GST 활성측정과 vitamin E, glutathione 함량 및 과산화지질함량을 측정하였다. 1) 혈청 GOT, GPT 및 AL-pase는 대조군에 비해 Cd 투여농도의 증가에 따라 증가하였다. 2) 간조직중의 SOD는 대조군에 비해 A군은 차이가 없었으나 B군에서 증가되었고 C, D군에서는 오히려 감소하였다. 3) 간조직중의 GPX, GST 활성은 대조군에 비해 Cd 투여농도에 따라 점진적으로 감소하였다. 4) 간조직중의 vitamin E 함량은 Cd 투여농도가 증가될수록 감소하였다. 5) 간조직중의 GSH 함량은 Cd투여농도 증가에 따라 감소하였고 GSSG는 증가하였다. 6) 간조직중의 LPO값은 A, B, C, D 군이 대조군에 비해 각각 1.1, 1.5, 1.8, 2.1배씩 증가되었다.

Keywords

• cadmium;
• peroxidative damage;
• hepatic protective system