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Thermostable ionizable lipid-like nanoparticle (iLAND) for RNAi treatment of hyperlipidemia

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Small interfering RNA (siRNA) therapeutic is considered to be a promising modality for the treatment of hyperlipidemia. Establishment of a thermostable clinically applicable delivery system remains a most challenging issue… Click to show full abstract

Small interfering RNA (siRNA) therapeutic is considered to be a promising modality for the treatment of hyperlipidemia. Establishment of a thermostable clinically applicable delivery system remains a most challenging issue for siRNA drug development. Here, a series of ionizable lipid-like materials were rationally designed; 4 panels of lipid formulations were fabricated and evaluated on the basis of four representative structures. The lead lipid (A1-D1-5) was stable at 40°C, and the optimized formulation (iLAND) showed dose and time dual-dependent gene silencing pattern with median effective dose of 0.18 mg/kg. In addition, potent and durable reduction of serum cholesterol and triglyceride were achieved by administering siRNAs targeting angiopoietin-like 3 or apolipoprotein C3 (APOC3) in high-fat diet–fed mice, db/db mice, and human APOC3 transgenic mice, respectively, accompanied by displaying ideal safety profiles. Therefore, siRNA@iLAND prepared with thermostable A1-D1-5 demonstrates substantial value for siRNA delivery, hyperlipidemia therapy, and prevention of subsequent metabolic diseases.

Keywords: treatment hyperlipidemia; lipid like; hyperlipidemia; ionizable lipid; thermostable ionizable

Journal Title: Science Advances
Year Published: 2022

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