The instant invention provides for novel cationic lipids that can be used in combination with other lipid components such as cholesterol and PEG-lipids to form lipid nanoparticles with oligonucleotides. It is an object of the instant invention to provide a cationic lipid scaffold that is susceptible to hydrolytic instability that may translate into reduced liver residence times and reduced hepatocellular toxicity. The present invention employs acetals and ketals to provide a low pH sensitive chemical handle for degradation.
本发明提供了一种新型阳离子脂质体,可与其他脂质成分(如
胆固醇和P
EG脂质体)结合,形成含寡核苷酸的脂质纳米粒子。本发明的目的是提供一种易于
水解的阳离子脂质体支架,可能导致减少肝脏滞留时间和减少肝细胞毒性。本发明采用
缩醛和
缩酮来提供低pH敏感的
化学手柄进行降解。