Targeted gene suppression by inducing de novo DNA methylation in the gene promoter.
Targeted gene suppression by inducing de novo DNA methylation in the gene promoter.
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通过在基因启动子中诱导 DNA 从头甲基化来抑制靶向基因
DOI:
10.1186/1756-8935-7-20
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发表时间:
2014
影响因子:
3.9
通讯作者:
Hu JF
中科院分区:
文献类型:
--
作者:
Ma AN;Wang H;Guo R;Wang YX;Li W;Cui J;Wang G;Hoffman AR;Hu JF
BackgroundTargeted gene silencing is an important approach in both drug development and basic research. However, the selection of a potent suppressor has become a significant hurdle to implementing maximal gene inhibition for this approach. We attempted to construct a ‘super suppressor’ by combining the activities of two suppressors that function through distinct epigenetic mechanisms.ResultsGene targeting vectors were constructed by fusing a GAL4 DNA-binding domain with a epigenetic suppressor, including CpG DNA methylase Sss1, histone H3 lysine 27 methylase vSET domain, and Kruppel-associated suppression box (KRAB). We found that both Sss1 and KRAB suppressors significantly inhibited the expression of luciferase and copGFP reporter genes. However, the histone H3 lysine 27 methylase vSET did not show significant suppression in this system. Constructs containing both Sss1 and KRAB showed better inhibition than either one alone. In addition, we show that KRAB suppressed gene expression by altering the histone code, but not DNA methylation in the gene promoter. Sss1, on the other hand, not only induced de novo DNA methylation and recruited Heterochromatin Protein 1 (HP1a), but also increased H3K27 and H3K9 methylation in the promoter.ConclusionsEpigenetic studies can provide useful data for the selection of suppressors in constructing therapeutic vectors for targeted gene silencing.
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影响因子:
14.9
作者:
Li T;Huang S;Jiang WZ;Wright D;Spalding MH;Weeks DP;Yang B
通讯作者:
Yang B
影响因子:
4.8
作者:
Hu, JF;Vu, TH;Hoffman, AR
通讯作者:
Hoffman, AR
影响因子:
56.9
作者:
Nakayam, J;Rice, JC;Grewal, SIS
通讯作者:
Grewal, SIS
影响因子:
4.8
作者:
Gräslund, T;Li, XL;Barbas, CF
通讯作者:
Barbas, CF
影响因子:
4.5
作者:
Emerson RO;Thomas JH
通讯作者:
Thomas JH