不同硒源对兔体液免疫及抗氧化能力影响的研究

目的:探讨不同硒源与兔体液免疫功能及抗氧化能力之间的关系。方法:实验兔35只,随机均分7组。各组在接种兔出血症灭活疫苗的同时,将亚硒酸钠、硒化卡拉胶、硒代蛋氨酸3种硒源按0.1和0.3mg/kgbw两种剂量(按硒计)组成6种配比,分别注射其中的6组,另1组不补硒,注射生理盐水作为对照。分别于免疫前1d、免疫后10、20、30d无菌心脏采血,测定血清抗体水平、GSH-Px活力和MDA含量。结果:在刺激抗体产生方面,硒化卡拉胶0.3mg/kgbw组、硒代蛋氨酸0.3mg/kgbw组和亚硒酸钠0.1mg/kgbw组效果显著地高于其他各组;而亚硒酸钠0.3mg/kgbw组、硒化卡拉胶0.3mg/kgbw组提高血清GSH-Px活力效果较好;各注射硒组均可降低血清MDA含量,其中又以硒化卡拉胶0.3mg/kgbw组效果最好。结论:硒化卡拉胶0.3mg/kgbw在增强兔体液免疫功能及抗氧化能力方面优于其他浓度组和其他硒源。

EFFECTS OF DIFFERENT SELENIUM SOURCES ON THE FUNCTION OF HUMORAL IMMUNITY AND ANTIOXIDANT CAPACITY OF RABBITS IN VIVO

Objective: To explore the effect of different selenium sources on the function of humoral immunity and antioxidant capacity of rabbits. Method: Thirty-five rabbits were randomly divided into seven groups and vaccinated with rabbit haemorrhagic disease (RHD) dead vaccine. At the same time, rabbits were injected respectively with sodium selenite (0.1 mg/kg bw and 0.3 mg/kg bw), Kappa-selenocanageenan (0.1 mg/kgbw and 0.3 mg/kg bw), DL-selenomethionine (0.1 mg/kg bw and 0.3 mg/kg bw) and physiological saline as control. Antibody against RHD, activity of GSH-Px and content of MDA in rabbit serum were detected on 0, 10, 20, 30d after inoculation. Results: Sodium selenite (0.1 mg/kg bw), Kappa- selenocanageenan (0.3 mg/kg), and DL-selenomethionine (0.3mg/kg bw) could significantly increase the level of RHD antibody. Sodium selenite (0.3 mg/kg bw) and Kappa-selenocanageenan (0.3mg/kg bw) improved the activity of GSH-Px. All selenium groups could decrease serum MDA, but Kappa-selenocanageenan (0.3 mg/kg bw) showed the best effect. Conclusion: Kappa-selenocanageenan (0.3 mg/kg bw) was better than the lower dosage and other selenium sources in the effects on the function in humoral immunity and antioxidant capacity of rabbits.