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Toringin, a bioflavonoid, is isolated from the bark of Docyniopsis tschonoski. Toringin progressively decreases not only the cis-effect of the expanded CTG repeats but cytotoxicity as well. Exposure to isosakuranetin, Toringin rescues PC12 neuronal cells. Flavonoids are efficacious for ameliorating the RNA gain of function caused by expanded CTG repeats, and have various biological activities and beneficial actions against cancers, coronary heart disease, among other pathologies[1].

[1] Furuya H, et al. Some flavonoids and DHEA-S prevent the cis-effect of expanded CTG repeats in a stable PC12 cell transformant. Biochem Pharmacol. 2005 Feb 1;69(3):503-16. DOI:10.1016/j.bcp.2004.10.005