High-fidelity CRISPR/Cas9- based gene-specific hydroxymethylation rescues gene expression and attenuates renal fibrosis.

High-fidelity CRISPR/Cas9- based gene-specific hydroxymethylation rescues gene expression and attenuates renal fibrosis.
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DOI:
10.1038/s41467-018-05766-5
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发表时间:
2018-08-29
影响因子:
16.6
通讯作者:
Zeisberg M
Zeisberg M
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Xu X;Tan X;Tampe B;Wilhelmi T;Hulshoff MS;Saito S;Moser T;Kalluri R;Hasenfuss G;Zeisberg EM;Zeisberg M

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While suppression of specific genes through aberrant promoter methylation contributes to different diseases including organ fibrosis, gene-specific reactivation technology is not yet available for therapy. TET enzymes catalyze hydroxymethylation of methylated DNA, reactivating gene expression. We here report generation of a high-fidelity CRISPR/Cas9-based gene-specific dioxygenase by fusing an endonuclease deactivated high-fidelity Cas9 (dHFCas9) to TET3 catalytic domain (TET3CD), targeted to specific genes by guiding RNAs (sgRNA). We demonstrate use of this technology in four different anti-fibrotic genes in different cell types in vitro, among them RASAL1 and Klotho, both hypermethylated in kidney fibrosis. Furthermore, in vivo lentiviral delivery of the Rasal1-targeted fusion protein to interstitial cells and of the Klotho-targeted fusion protein to tubular epithelial cells each results in specific gene reactivation and attenuation of fibrosis, providing gene-specific demethylating technology in a disease model. Suppression of gene expression due to aberrant promoter methylation contributes to organ fibrosis. Here, the authors couple a deactivated Cas9 to the TET3 catalytic domain to induce expression of four antifibrotic genes, and show that lentiviral-mediated delivery is effective in reducing kidney fibrosis in mouse models.
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