摘要
目的:探讨大豆硒蛋白的生物学功能。方法:用纯昆明种小鼠及移植法建立的S180肿瘤动物模型,以不同剂量的天然大豆硒蛋白喂饲,通过机体抗氧化能力、免疫调节能力、对肿瘤的抑制作用及相关生理生化指标的检测考察大豆硒蛋白的生物学功能。结果:(1)补充剂量在硒0￣202.5μg/kgbw范围内,随着补充剂量增大,实验小鼠的白细胞计数、血红蛋白含量、胸腺重量显著增加;血清GSH-Px、SOD及肝脏GSH-Px酶活力增强;血清及肝组织脂质过氧化物(LPO)均明显降低。但补充剂量达607.5μg/kg后,实验条件下,各项评价指标逆转。(2)在硒0￣202.5μg/kg剂量范围内,随大豆硒蛋白补充剂量的增加,对S180肉瘤的抑制作用显著增强(补硒剂量在202.5μg/kg时其抑瘤率达78%左右),荷瘤小鼠的存活时间延长;(3)实验条件下,补充硒剂量达202.5μg/kg时,未见试验小鼠有任何中毒迹象。结论:补充硒剂量在202.5μg/kgbw范围内,大豆硒蛋白能显著增加体内抗氧化酶的活力、促进免疫器官发育、抑制S180肿瘤生长,且无任何毒副作用。
Objective: To investigate the biological function of soybean selenoprotein by the study of anti-oxidation,immunological and anticarcinogenic efficacy. Method: The soybean selenoprotein at different doses of Se were fed intra-gastrically in Kunming mice. A low Se feedstuff was used as basic diet. Result: (1) when dose is below 202.5 μg/kg bw Se, the number of white cell and red cell was increased remarkably, and the activity of GSH-Px and SOD in liver and serum was increased at dose dependent manner, but LPO in serum and liver was decreased noticeably. At level of 607.5μg/kg, all the indices were reversed; (2) A dose-dependent cancer protective effect was expressed in range of 22.5-202.5μg/kg Se of soybean selemoprotein in the diet. Feeding soybean selenoprotein can postpone the death of mice with carcinoma . Total tumour yield was consistently reduced by 78% with 202.5μg/kg supplementation; (3) Any abnormal response was never noticed during all trial by supplementing 202.5μg/kg selenoprotein. Conclusion: The increased effect of anti-oxidation and immunological modulation might be the mechanism of tumour suppression by soybean selenoprotein, and Kunming mice tolerated the soybean selenoprotein very well without any side effects.
出处
《营养学报》
CAS
CSCD
北大核心
2004年第6期460-463,共4页
Acta Nutrimenta Sinica
基金
湖北省教育厅资助重大项目(No:99Z06)
关键词
大豆硒蛋白
抗氧化
免疫调节
抗肿瘤活性
soybean selenoprotein
anti-oxidation
immune adjusting
anticarcinogenic activity
