CY7 is an ionizable lipid engineered for localized pulmonary mRNA delivery. Its structure combines a cyclohexane-based core, a 4-dimethylaminopiperidine ionizable headgroup, two ester linkers, and four extended hydrophobic branches. In LNPs formulated with cholesterol, DSPC, and DMG-PEG, CY7 produced substantially higher local luciferase expression and lung-to-liver selectivity than SM-102 following intratracheal administration. CY7 LNPs also enhanced functional mRNA expression in pulmonary neutrophils, endothelial and epithelial cells, as well as dendritic and B cells in lung-draining lymph nodes. When used to deliver PcrV and OprF-I mRNAs, pulmonary CY7 LNP vaccination generated rapid antigen-independent innate protection followed by durable antigen-specific humoral, mucosal, and cellular immunity. In mouse models, it reduced bacterial burden and improved survival following challenge with laboratory and carbapenem-resistant Pseudomonas aeruginosa. CY7 remains a preclinical research lipid requiring further pharmacokinetic, repeat-dose, and translational safety evaluation.

Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to 24 months.
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20°C. Generally, these will be useable for up to one month. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.

Mastrangelo A, Robles-Vera I, Mañanes D, et al. Imidazole propionate is a driver and therapeutic target in atherosclerosis. Nature. 2025;645:254–261.