中国农业科学 ›› 2009, Vol. 42 ›› Issue (11): 4027-4034 .doi: 10.3864/j.issn.0578-1752.2009.11.033

• 贮藏·保鲜·加工 • 上一篇    下一篇

3种吸附剂对黄曲霉毒素B1吸附能力的研究

李娟娟,索德成,苏晓鸥

  

  1. (中国农业科学院农业质量标准与检测技术研究所)
  • 收稿日期:2009-03-05 修回日期:2009-04-13 出版日期:2009-11-10 发布日期:2009-11-10
  • 通讯作者: 苏晓鸥

Binding Assay for Aflatoxin B1 by 3 Absorbents

LI Juan-juan, SUO De-cheng, SU Xiao-ou
  

  1. (中国农业科学院农业质量标准与检测技术研究所)
  • Received:2009-03-05 Revised:2009-04-13 Online:2009-11-10 Published:2009-11-10
  • Contact: SU Xiao-ou

摘要:

【目的】体外试验评价3种吸附剂(吸附剂A:主成分为酵母细胞壁提取物;吸附剂B:主成分为水合铝硅酸盐;吸附剂C为复合物,主成分是酵母细胞壁及水合铝硅酸盐)对黄曲霉毒素B1(AFB1)的吸附效果,并通过吸附剂对摄入AFB1肉仔鸡生长性能及血清蛋白水平的影响验证体外试验结果。【方法】(1)pH为2.0、6.0、8.0的磷酸盐缓冲溶液(PBS溶液)、人工胃液和人工肠液环境下吸附剂对AFB1的吸附能力;(2)吸附剂对AFB1的结合速率;(3)吸附剂结合AFB1形成的复合体的稳定性;(4)240只1日龄雄性AA肉仔鸡,随机分为8个处理,比较吸附剂对摄入AFB1肉仔鸡生长性能及血清蛋白水平的影响。【结果】(1)5种酸碱条件下吸附剂结合AFB1的能力大小顺序为B>C>A;(2)吸附剂B在10 min内对AFB1吸附率达到97.69 %,且60 min内一直处在96.03 %以上,而吸附剂A、C在60 min内对AFB1的吸附能力不稳定;(3)与吸附剂A、C相比较,体外条件下吸附剂B与AFB1形成的复合体解吸附率最低;(4)与基础组比较,AFB1组肉仔鸡采食量、体重增加显著下降,料重比显著增加(P<0.05),血清总蛋白(TP)、白蛋白(ALB)、球蛋白(GLOB)水平均显著下降(P<0.05)。3种吸附剂均能提高肉仔鸡生长性能,吸附剂B能显著改善摄入AFB1污染日粮(98.98 μg?kg-1)的肉仔鸡血清蛋白水平的降低,添加吸附剂A或C效果不显著。【结论】3种吸附剂对AFB1均有一定的吸附作用,吸附剂B的作用效果优于吸附剂A和吸附剂C。结果提示,将吸附剂B应用于被AFB1污染的家禽饲料中,与其它霉菌毒素管理措施相结合,能降低AFB1对肉仔鸡的危害。

关键词: 吸附剂, 黄曲霉毒素B1, 吸附能力

Abstract:

【Objective】 In this study, the in vitro sorption of aflatoxin B1(AFB1) onto different absorbents was characterized, and the in vitro assay result was verified by comparing growth performance and serum protein levels of broilers exposed to aflatoxin-contamination feed. Three absorbents were product A (the main component is yeast cell extracts), product B (the main component is HSCAS) and product C (the compound of yeast product and HSCAS). 【Method】 AFB1 binding capacity by three adsorbents at pH 2.0, 6.0, 8.0, simulated gastric fluid and simulated intestinal fluid condition, were compared. AFB1 binding speed by three absorbents in vitro conditions were compared. Stability of absorbent-AFB1 complexes in vitro conditions were studied. A total of 240 broilers were assigned to 8 treatments, and the effects of three adsorbents on growth performance and serum protein levels were compared. 【Result】 Product B showed the highest in vitro affinity for AFB1, followed by product C and product A. Product B bounded 97.69% of the AFB1 in solution in 10 min, and it remained over 96.03% in 60 min at pH 8.0. Product A and product C did not show the same efficacy as product B. The product B-AFB1 complex was much stronger than the other two kinds of complex in vitro condition. Feed intake and weight gain decreased (P<0.05) and feed gain ratio increased (P<0.05) in the treatment fed aflatoxin-contaminated feed as compared with the control. Serum total protein (TP), albumin (ALB), globulin (GLOB) levels were significantly decreased (P<0.05). Product B (0.15%) increased growth performance and improved serum protein levels, product A and product C did not show so effectively as product B. 【Conclusion】 Three absorbents all showed binding capacity for AFB1 in some extent and product B could bind AFB1 more effectively than products A and C. These results indicated that product B could alleviate some of the toxic effect in broilers. It might prove to be beneficial in the management of aflatoxin-contaminated feedstuffs for poultry.

Key words: absorbent, AFB1, absorption efficacy