LNP & Exosome Lipidomics: Comprehensive Characterization for Next-Generation Drug Delivery Systems

Objective: Unbiased screening for unknown components, impurities, or competitive reverse engineering.

For early-stage discovery where the exact composition of a sample is unknown, we employ a "wide-net" approach. By utilizing our untargeted lipidomics service, we perform full-scan MS/MS analysis to capture over 4,000 lipid features. This allows for the reverse engineering of reference drugs (RLDs) to identify proprietary helper lipids or determine PEG-lipid chain lengths without prior knowledge.

For exosome researchers, distinguishing true vesicles from contaminants is vital. Our workflow combines exosome isolation and identification with lipid profiling to identify specific markers such as Lyso-bis-phosphatidic acid (LBPA), ensuring your starting material is of high biological purity before downstream analysis.

Objective: Absolute quantification of defined components to verify N/P ratios and batch consistency.

Once a formulation is defined, precision is paramount. We use specific panels to verify the integrity of each component. To confirm the exact concentration of your ionizable and helper lipids (like DSPC), we utilize targeted lipidomics. Specifically, our phospholipids analysis ensures that the helper lipids are present in the exact molar ratios required to facilitate endosomal escape.

Furthermore, stability is monitored by detecting degradation products. By deploying fatty acid analysis, we can quantify the release of free fatty acids (e.g., Myristic acid), which serves as a sensitive indicator of lipid hydrolysis. We also recommend cholesterol analysis to distinguish pharmaceutical-grade cholesterol from plant-derived phytosterol impurities that can alter membrane fluidity.

For exosome purity verification, profiling membrane-specific sphingolipids or ceramides provides a biochemical fingerprint that distinguishes vesicles from plasma lipoproteins.

Objective: Elucidating degradation pathways, oxidation mechanisms, and biological interactions.

This advanced tier answers the "why" questions regarding formulation failure or bioactivity. Since ionizable lipids are prone to oxidation, applying specialized oxidized lipids analysis allows us to detect and quantify critical impurities like N-oxides and lipid hydroperoxides.

Additionally, if you are studying the inflammatory response to LNP administration, our eicosanoids analysis can help elucidate the potential immunogenicity of your carrier by measuring bioactive signaling lipids, such as prostaglandins and leukotrienes.