^99mTc-SNW-1 Nanoparticle Labeling and Its Biodistribution/Pathological Evaluations

This study aimed to evaluate the targeted diagnostic imaging and therapeutic applications of SNW-1 nanoparticles. The nanoparticles were synthesized using microwave technique and characterized in terms of size, zeta potential, morphology, and chemical structure. The results demonstrated that the quasispherical and planar nanoparticles with the size of 370.4 nm and zeta potential of 0.4 mV were synthesized. Then, the nanoparticles were labeled with technetium-99m, and their in vivo biodistribution was assessed. Based on the results, the highest accumulation of the nanoparticles was observed in the bladder, liver, kidney, and heart tissues of the rabbits, respectively, while in the rat, the highest accumulation was observed in the liver, bladder, and heart tissues, respectively. In the rabbits, on average, the accumulation of the nanoparticles in the bladder was 7.4-, 8.7-, and 44.1-fold higher than that of the liver, kidney, and heart, respectively, while in the rat, the accumulation of the nanoparticles in the liver was 8.4- and 20.3-fold higher compared to that of the bladder and heart, respectively. The high bladder accumulation of the SNW-1 nanoparticles can be indicated by their high clearance, making them especially appropriate for kidney imaging and therapeutic applications.