中国农业科学 ›› 2007, Vol. 40 ›› Issue (9): 2084-2090 .

• 畜牧·兽医·资源昆虫 • 上一篇    下一篇

鹅热休克蛋白70的表达提纯与病毒复合物形成的研究

吴晓平,王宝维,张旭晖,王 斌,贾晓晖,张名爱,龙芳羽,杨志刚,王 雷   

  1. 青岛农业大学优质水禽研究所
  • 收稿日期:2006-05-11 修回日期:2006-10-24 出版日期:2007-09-10 发布日期:2007-09-10
  • 通讯作者: 王宝维

Expression and Purification of Goose’s HSP70 and Complex Formation with Virus Polypeptide

  1. 青岛农业大学优质水禽研究所
  • Received:2006-05-11 Revised:2006-10-24 Online:2007-09-10 Published:2007-09-10

摘要: 【目的】为研究HSP70在热应激时的特异性表达、组织中HSP70的分离纯化及其结合抗原肽形成复合物的特性,设计此试验。【方法】选取6 w健康五龙鹅60只随机分为3组,对照组鹅不经热处理,试验1组鹅进行1次(42±1)℃、5 h的急性热处理后立即宰杀,试验2组鹅经热处理后在正常饲养条件下恢复12h后宰杀。取心脏,常规石蜡切片做免疫组化试验;肝脏用于提纯HSP70。比较处理组鹅心脏HSP70表达的差异,同时对肝脏中HSP70进行分离纯化、鉴定。纯化后的HSP70和人工合成的乙肝病毒前S1多肽相结合形成复合物,以双特异抗体夹心法检测其复合物的形成。【结果】热应激状态下心肌纤维中有广泛的HSP70阳性颗粒,试验1组HSP70表达部位重点在核膜及其周围,阳性细胞率为76.0%,试验2组HSP70表达部位转移到胞膜周围,阳性细胞率为88.4%。通过两套纯化方案纯化蛋白均可得到HSP70纯化物,蛋白纯度分别为85.0%和95.0%,蛋白得率分别为0.115mg•g-1和0.157 mg•g-1。一定条件下合成肽与HSP70纯化物形成复合物,双特异性抗体夹心法检测复合物为阳性,复合物效价为1﹕81,表明试验中有复合物的形成。【结论】热应激时HSP70的特异性表达部位,在不同时间有所转移,显示HSP70在细胞保护中可能具有一定的功能。在低压层析条件下可以得到高纯度的HSP70蛋白,相比较而言,分子筛初步分离、ConA琼脂糖层析和ADP琼脂糖层析这一流程的纯化效果更好。在一定条件下,人工合成肽可以与HSP70相结合形成复合物,这将为进一步证明复合物的免疫作用提供试验基础。

关键词: 热应激, 鹅, HSP70, 表达, 提纯, 病毒复合物

Abstract: Abstract:【OBJECTIVE】 In order to study the specificity expression of HSP70 in heat shock, HSP70 purification and its characteristic of coalescent with antigen peptide to form the compound, we designed this experiment;【METHOD】 60 healthy, 6 weeks ages male Wulong geese were selected and stochastically divided into 3 groups, the geese in Control group didn’t pass through the heat treatment, while the treatment 1 group were shocked by 1 time 42±1℃, 5h acute heat treatment and then were slaughtered immediately, the treatment 2 group restored 12h after the heat treatment under the normal raising condition and then were slaughtered. Hearts were taken to make paraffin section for the immunization organizations chemical experiment and livers were used to purify HSP70. Geese hearts HSP70 expression differences in 3 groups were determined, at the same time experiments of HSP70 purification and appraisal in the liver was carried on. HSP70 purification and synthesis HBV PreS1 multi- peptides unified the compound, and was determined by the double special immune body ELISA. 【RESULTS】 The findings indicated that, widespread HSP70 masculine pellets in the cardic muscle were found in the hot shock condition, HSP70 expression in treatment group 1 centered in the karyotheca and its periphery, but treatment group 2 centered the emphasis in the cell membrane around; We could obtain the HSP70 purification through two sets of purification plans; the synthesis peptide and the HSP70 purification forms the compound under the certain condition, examination taken to compound formation with the double specificity immune body, and the examination result was masculine, which explained that the compound had formed. 【CONCLUSION】 HSP70 specificity expression in heat shock shifted by time, and it may suggest that HSP70 possibly do some certain functions in the cell protection; we can obtain high-purity HSP70 protein under the low pressure chromatographic analysis condition, and it was compared to be better the molecular sieve preliminary separation, ConA-agarose chromatographic analysis and the ADP-agarose chromatographically analyzes flow; Under in vitro certain condition, the man-power synthesizes the peptide to be possible to unify with HSP70 forms the compound, this for further proved the compound the immunity function provides the experimental foundation.

Key words: Heat shock, goose, HSP70, expression, purification, Virus complexs