人hsp90β基因的诱导表达与染色质活化的关系

目的 研究人ｈｓｐ９０β基因的热诱导表达与染色质活化的关系。方法 采用有机汞亲和层析柱分离热诱导前后Ｊｕｒｋａｔ细胞内的活性和非活性染色质。然后采用狭缝杂交技术比较热诱地前后人ｈｓｐ９０β基因在活性和非活性染色质中的分布,并用Ｎｏｒｔｈｅｒｎ印迹杂交的方法研究热休克诱导下的ｈｓｐ９０βｍＲＮＡ表达。结果 发现热休克诱导使细胞内人ｈｓｐ９０β基因在活性染色质中的含量明显增加,并与内源性的ｈｓｐ９０β

Distribution of human hsp90 beta gene in active chromatin upon heat shock

OBJECTIVE: To study the distribution of human hsp90 beta gene in active chromatin of Jurkat cells subjected to heat shock. METHODS: Active and inactive chromatin were isolated by using organomercurial affinity chromatography from Jurkat cells with or without heat shock. Slot-blot hybridization was then carried out with human hsp90 beta cDNA probe. And the efficiency of mRNA expression was studied by Northern blot hybridization. RESULTS: The content of the hsp90 beta gene distributed in the active chromatin was increased upon heat shock which was comparable with the highly efficient mRNA expression induced by the same treatment. CONCLUSIONS: The results suggested chromatin activity was a prerequisite for heat shock induction of hsp90 beta gene.