
Nature, Journal Year: 2024, Volume and Issue: 627(8003), P. 416 - 423
Published: Feb. 28, 2024
Abstract Permanent epigenetic silencing using programmable editors equipped with transcriptional repressors holds great promise for the treatment of human diseases 1–3 . However, to unlock its full therapeutic potential, an experimental confirmation durable after delivery transient in vivo is needed. To this end, here we targeted Pcsk9 , a gene expressed hepatocytes that involved cholesterol homeostasis. In vitro screening different editor designs indicated zinc-finger proteins were best-performing DNA-binding platform efficient mouse A single administration lipid nanoparticles loaded editors’ mRNAs almost halved circulating levels PCSK9 nearly one year mice. Notably, and accompanying repressive marks also persisted forced liver regeneration, further corroborating heritability newly installed state. Improvements construct design resulted development all-in-one configuration term evolved engineered repressor (EvoETR). This design, which characterized by high specificity profile, reduced mice efficiency comparable obtained through conventional editing, but without causing DNA breaks. Our study lays foundation therapeutics are based on silencing.
Language: Английский