Poly-(ethylene glycol) modified gelatin nanoparticles for sustained delivery of the anti-inflammatory drug Ibuprofen-Sodium: An in vitro and in vivo analysis

The limited bioavailability and rapid clearance of the anti-inflammatory drug Ibuprofen Sodium (IbS) necessitates repeated drug administration. To address this, injectable IbS loaded PEGylated gelatin nanoparticles (PIG NPs) of size similar to 200 nm and entrapment efficiency similar to 70%, providing sustained release in vitro were prepared by a modified two-step desolvation process. The developed nanomedicine, containing a range of IbS concentrations up to 1 mg/mL proved to be non-toxic, hemocompatible and non-immunogenic, when tested through various in vitro assays and was reaffirmed by in vivo cytokine analysis. HPLC analysis of intravenously administered PIG NPs showed a sustained release of IbS for similar to 4 days with improved bioavailability and pharmacokinetics when compared to bare IbS and IbS-loaded non-PEGylated GNPs. Histological analysis of liver and kidney revealed tissue integrity as in the control, indicating biocompatibility of PIG NPs. The results demonstrate improved plasma half-life of IbS when encapsulated within nanogelatin, thereby aiding reduction in its frequency of administration. From the Clinical Editor: In this preclinical study, improved plasma half-life of ibuprofen sodium was demonstrated when encapsulated within PEGylated gelatin nanoparticles of similar to 200 nm size, expected to lead to reduced frequency of administration in future clinical applications. (c) 2013 Elsevier Inc. All rights reserved.