目的:为深入研究热休克蛋白27(heat shock protein27,HSP27)的生理与病理功能,应用PAdEasy腺病毒载体系统构建带荧光蛋白的小鼠HSP27重组腺病毒,并进行鉴定。方法:采用基因技术,将目的基因克隆至穿梭质粒pAdTrack-CMV中,通过PCR、序列测定、酶切鉴定;利用PAdEasy系统进行重组,在293细胞中包装和扩增,然后体外感染小鼠精原母细胞,Western blot检测HSP27蛋白表达。结果:测序和酶切鉴定重组腺病毒质粒构建正确;经293细胞包装后可观察到绿色荧光,收获高滴度重组腺病毒体外感染小鼠精原母细胞.并且可正确表达HSP27。结论:应用PAdEasy系统重组技术成功构建了小鼠HSP27带荧光蛋白腺病毒载体,并在小鼠精母细胞系进行体外有效表达,为进一步研究HSP27的功能奠定基础。
Objective:To investigate the physiological and pathological function of HSP27 by construct and identify the recombinant adenoviruses containing green fluorescence protein(GFP)and mouse HSP27 gene with PAdEasy system. Methods:The coding region of HSP27 was subcloned into the shuttle vector pAdTrack-CMV to form pAdTrack-CMV-HSP27. The identification was performed by PCR,sequencing and restriction digest. Chemical transformation of the plasmid pAdEasy-1 into E. coli BJ5183 strain was performed to prepare BJ5183-pAdEasy-1 as the competent bacterium,in which pAdEasy-1 and pAdTrack-CMV-HSP27 were cotransformed. Finally,the recombinant adenovirus containing the coding region of HSP27 gene was constructed by transfecting 293 cells with linearized adenoviral genomes of Ad-CMV-HSP27,and produce was used to infect mice spermatocyte,the expression of HSP'27 protein was detected by Western blot. Results:The recombinant plasmids identified by PCR and directly sequencing were positive. GFP was observed after construction,high concentration of spermatocytes infected by recombinant adenortrus was harvested,and HSP27 protein expressed correctly. Conclusion:The recombinant adenoviruses expressing HSP27 and GFP using AdEasy system, which will facilitate further functional studies of HSP27, are successfully performed in this study.