Preparation and in vitro characterization of slow release testosterone nanocapsules in alginates.
Slow release testosterone-loaded nanocapsules in alginate, biodegradable hydropolymer, were prepared by in situ nanoemulsion-polymer crosslinking approach. Different formulations varying in the drug loading solvent phase were prepared. Four different drug-loading solvents were assayed and the food grade hexane provided nanocapsules testosterone load of 30%. Testosterone loading was confirmed by FT-IR, DSC and quantitated by HPLC. Prepared nanocapsules appeared spherical with a dense drug core in transmission electron microscopy studies. Hydrodynamic diameter of nanocapsules was 34.5 +/- 1.7 nm, with a Gaussian distribution and the zeta potential -5.0 meV. Sustained diffusive drug release was observed in vitro, following zero order kinetics releasing the drug payload over a period of 48 hours. Embedding testosterone in alginate provided sustained release. Different drug loading solvents have distinct influence on drug loading and nanocapsules size distribution. The nanocapsulation technique developed can be a good choice for the development of different sustained steroid hormonal drug carriers.
Division of Pharmaceutical Technology, Department of Chemical Technology, University of Calcutta, 92, A.P.C. Road, Kolkata-700009, India.
Benoy Brata
BB
Bhowmik
Biswanath
B
Sa
Arup
A
Mukherjee
D000464:Alginates / Q000737:chemistry*; D002152:Calorimetry, Differential Scanning; D003432:Cross-Linking Reagents; D003692:Delayed-Action Preparations; D004339:Drug Compounding; D004655:Emulsions; D046529:Microscopy, Electron, Transmission; D053769:Nanocapsules; D010316:Particle Size; D012997:Solvents; D017550:Spectroscopy, Fourier Transform Infrared; D013739:Testosterone / Q000008:administration & dosage* / Q000737:chemistry
D000464:Alginates; D003432:Cross-Linking Reagents; D003692:Delayed-Action Preparations; D004655:Emulsions; D053769:Nanocapsules; D012997:Solvents; D013739:Testosterone