Current advances in super-resolution microscopy have enabled unprecedented visualization of mobile buildings, monitoring of nanomaterials in organic environments, or the elucidation of particular nano-bio interactions. But, dynamic quantification of cargo launch from particular person nanocarriers stays unexplored. Right here, we leverage the excessive spatial decision of direct stochastic optical reconstruction microscopy (dSTORM) to watch protein launch on the single-nanocarrier stage. Poly(lactic-co-glycolic acid) (PLGA) nanocapsules labelled with Cyanine5 and loaded with bovine serum albumin (BSA) tagged with Alexa Fluor 488 are characterised utilizing dSTORM alongside different characterization methods. dSTORM allowed us to concurrently observe modifications in nanocarrier measurement and cargo localization over time. Our outcomes show a time-dependent improve in nanocapsule diameter and a lower in nanocarrier focus. The quantitative evaluation of particular person nanocarriers reveals single-particle protein launch profiles, characterised by an preliminary burst adopted by sustained launch, with full launch achieved after 30 days. This research represents the primary utility of super-resolution microscopy to spatially and temporally resolve protein launch from nanocarriers, providing single-molecule sensitivity and nanometric decision, and capturing heterogeneity that ensemble-averaged methods overlook. Our method enhances different pharmacokinetic analyses and establishes a strong technique to judge the cargo launch from different nanocarriers by super-resolution microscopy.
