Investigating the Pharmacokinetics and Biological Distribution of Silver-Loaded Polyphosphoester-Based Nanoparticles Using 111Ag as a Radiotracer
Purified 111Ag was used as a radiotracer to investigate silver loading and release, pharmacokinetics, and biodistribution of polyphosphoester-based degradable shell crosslinked knedel-like (SCK) nanoparticles as a comparison to the previously reported small molecule, N-heterocyclic silver carbene complex analog (SCC1) for the delivery of therapeutic silver ions in mouse models. Biodistribution studies were conducted by aerosol administration of 111Ag acetate, [111Ag]SCC1, and [111Ag]SCK doses directly into the lungs of C57BL/6 mice. Nebulization of the 111Ag antimicrobials resulted in an average uptake of 1.07 ± 0.12% of the total aerosolized dose given per mouse. The average dose taken into the lungs of mice was estimated to be 2.6 ± 0.3% of the dose inhaled per mouse for [111Ag]SCC1 and twice as much dose was observed for the [111Ag]SCKs (5.0 ± 0.3% and 5.9 ± 0.8% for [111Ag]aSCK and [111Ag]zSCK, respectively) at 1 h post administration (p.a.). [111Ag]SCKs also exhibited higher dose retention in the lungs; 62–68% for [111Ag]SCKs and 43% for [111Ag]SCC1 of the initial 1 h dose were observed in the lungs at 24 h p.a.. This study demonstrates the utility of 111Ag as a useful tool for monitoring the pharmacokinetics of silver-loaded antimicrobials in vivo.
Journal of Labelled Compounds and Radiopharmaceuticals
Aweda, Tolulope A.; Zhang, Shiyi; Mupanomunda, Chiedza; Burkemper, Jennifer; Heo, Gyu Seong; Bandara, Nilantha; Lin, Mai; Cutler, Cathy S.; Cannon, Carolyn L.; Youngs, Wiley J.; Wooley, Karen L.; and Lapi, Suzanne E., "Investigating the Pharmacokinetics and Biological Distribution of Silver-Loaded Polyphosphoester-Based Nanoparticles Using 111Ag as a Radiotracer" (2015). Chemistry Faculty Research. 30.