Studies on immunotoxicity of phenol and SDBS to hybrid tilapia (Tilapia niloticaT.aurea)
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摘要: 用5种浓度的十二烷基苯磺酸钠(sodium dodecyl benzene sulfonic,SDBS)浸泡刺激奥尼罗非鱼(Tilapia nilotica ♀T.aurea ♂)8周,每2周采血样1次,测定免疫指标。0.05和0.10 mgL-1组对奥尼罗非鱼的氯化硝基四氮唑兰(nitro blue tetrazolium,NBT)阳性细胞和IgM含量无影响。0.40 mgL-1组在第8周时,IgM含量显著下降,而NBT阳性细胞突然急剧下降,与对照组相比差异极显著。0.70 mgL-1组从第4周起,NBT阳性细胞和IgM含量开始减少,第6周时差异显著。1.00 mgL-1组NBT阳性细胞数在第2周时量就已经有减少,但与对照组相比差异不显著,到第4周时差异极其显著;在第4周时IgM含量有显著差异,第6周后差异极显著。攻毒试验表明,0.40、0.70和1.00 mgL-1组的死亡率均高于对照组。以上结果表明,当SDBS浓度大于0.40 mgL-1时,奥尼罗非鱼免疫功能不同程度受到抑制,对NBT阳性细胞和IgM的影响存在着时间与剂量效应。
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关键词:
- 十二烷基苯磺酸钠(SDBS) /
- 奥尼罗非鱼 /
- 免疫指标 /
- NBT阳性细胞 /
- IgM
Abstract: The main immune indexes of hybrid tilapia (Tilapia nilotica♀T.aurea♂) were measured every two weeks. The 0.05 and 0.10 mgL-1 sodium dodecyl benzene sulfonic (SDBS) had not affected the numbers of NBT-positive cells and content of IgM. The 0.40 mgL-1 SDBS significantly reduced the numbers of NBT-positive cells and content of IgM in eighth week. The 0.70 mgL-1 SDBS significantly reduced the numbers of NBT-positive cells and content of IgM in sixth week. The 0.10 mgL-1 SDBS significantly reduced the numbers of NBT-positive cells and content of IgM in fourth week. Mortality of hybrid tilapia after injection of Aeromonas hydrophila (0.40, 0.70 and 1.00 mgL-1 SDBS) was higher than the control. These results indicated that low concentration of SDBS (0.05 and 0.10 mgL-1) did not affect the immune function of hybrid tilapia, but the higher concentrations of SDBS (0.40, 0.70 and 1.00 mgL-1) will apparently reduce the immune function of hybrid tilapia along with time changed.-
Key words:
- sodium dodecy benzene sulfonic (SDBS) /
- hybrid tilapia /
- immune index /
- NBT-positive cell /
- IgM
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