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- W3014078748 abstract "Abstract The molecular mechanisms of reduced frataxin ( FXN ) expression in Friedreich’s ataxia (FRDA) are linked to epigenetic modification of the FXN locus caused by the disease-associated GAA expansion. Here, we identify that SUV4-20 histone methyltransferases, specifically SUV4-20 H1, play an important role in the regulation of FXN expression and represent a novel therapeutic target. Using a human FXN -GAA-Luciferase repeat expansion genomic DNA reporter model of FRDA, we screened the Structural Genomics Consortium epigenetic probe collection. We found that pharmacological inhibition of the SUV4-20 methyltransferases by the tool compound A-196 increased the expression of FXN by approximately 1.5-fold in the reporter cell line and in several FRDA cell lines and patient-derived primary peripheral blood mononuclear cells. SUV4-20 inhibition was accompanied by a reduction in H4K20me2 and H4K20me3 and an increase in H4K20me1, but only modest (1.4–7.8%) perturbation in genome-wide expression was observed. Finally, based on the structural activity relationship and crystal structure of A-196, novel small molecule A-196 analogues were synthesized and shown to give a 20-fold increase in potency for increasing FXN expression. Overall, our results suggest that histone methylation is important in the regulation of FXN expression, and highlight SUV4-20 H1 as a potential novel therapeutic target for FRDA." @default.
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- W3014078748 date "2020-03-28" @default.
- W3014078748 modified "2023-09-26" @default.
- W3014078748 title "Inhibition of the SUV4-20 H1 histone methyltransferase increases frataxin expression in Friedreich’s ataxia patient cells" @default.
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- W3014078748 doi "https://doi.org/10.1101/2020.03.26.010439" @default.
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