Development of Tc-99m radiolabeling PLGA parameters nanoparticles: Preparation, characterization and evaluation of radiolabeling parameters

Abstract

Radiolabeled polymeric NPs are widely used drug delivery systems in cancer therapy and imaging due to their easy and rapid formation. These systems provide several advantages for imaging and therapy of many diseases and cancers, such as increased sensitivity, better image quality, etc. In this study, Tc-99m radiolabeled PLGA nanoparticles were prepared in different conditions and these conditions were investigated. The amount of reducing agent, incubation temperature and time, and pH were investigated to obtain the 99mTc-PLGA nanoparticles with higher RCP (%). NPs were formed well with the nanoprecipitation method between 180-200 nm. Then, the optimum formulation was obtained with 50 µl SnCl2 at pH 7 and 25 ºC conditions for 30 minutes of incubation time. This formulation was found stable at 25 ºC for 12 hours while showing 3 hours of stability at 37 ºC. The data proved that PLGA NPs can be radiolabeled with Tc-99m at high efficiency and showed relatively high radiolabeling stability.

Keywords

• Technetium-99m
• PLGA nanoparticles
• radiolabelling
• radiopharmaceuticals

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