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Comparative in vivo biodistributions of nanoparticles and polymers of 177lutetium-labeled hyaluronic acids in mice during 28 days

  • Lin, Chunmei (College of Chinese Medicinal Materials, Jilin Agricultural University) ;
  • Jeong, Ju-Yeon (College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University) ;
  • Yon, Jung-Min (Division of Biosafety Evaluation and Control, Centers for Disease Control & Prevention) ;
  • Park, Seul Gi (College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University) ;
  • Gwon, Lee Wha (College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University) ;
  • Lee, Jong-Geol (College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University) ;
  • Baek, In-Jeoung (Asan Institute for Life Sciences, Asan Medical Center and University of Ulsan) ;
  • Nahm, Sang-Soep (College of Veterinary Medicine, Konkuk University) ;
  • Lee, Beom Jun (College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University) ;
  • Yun, Young Won (College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University) ;
  • Nam, Sang-Yoon (College of Veterinary Medicine and Veterinary Medical Center, Chungbuk National University)
  • 투고 : 2017.02.21
  • 심사 : 2017.05.23
  • 발행 : 2017.06.30

초록

Hyaluronic acid (HA) has been investigated for biomedical and pharmaceutical applications. This study was conducted to determine the distributions of HA nanoparticles (NPs; size 350-400 nm) and larger HA polymers in mice at intervals after application. $^{177}Lutetium$ (Lu)-labeled HA-NPs or HA polymers were intravenously injected (5 mg/kg) into male ICR mice, and radioactivity levels in blood and target organs were measured from 0.25 h to 28 days post-injection. In blood, the radioactivities of HA-NPs and HA polymer peaked at 0.5 h after injection but were remarkably decreased at 2 h; subsequently, they maintained a constant level until 6 days post-injection. HA-NPs and HA polymers were observed in the liver, spleen, lung, kidney, and heart (in ascending order) but were seldom observed in other organs. After 3 days, both the HA-NP and HA polymer levels showed similar steady decreases in lung, kidney, and heart. However, in liver and spleen, the HA-NP levels tended to decrease gradually after 1 day and both were very low after 14 days, whereas the HA polymer level accumulated for 28 days. The results indicate that HA-NPs, with their faster clearance pattern, may act as a better drug delivery system than HA polymers, especially in the liver and spleen.

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