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227Th-EDTMP: a potential therapeutic agent for bone metastasis.

Abstract
The biodistribution of 227Th-EDTMP and retention of its daughter nuclide 223Ra were examined. 227Th-EDTMP was found to show high uptake and long-term retention in bone. The clearance of 227Th-EDTMP from blood and soft tissues was rapid and the femur-to-tissue uptake ratios reached more than 100 within 30 min for all tissues except the kidney. Seven and 14 days after injection of 227Th-EDTMP, the retention index of 223Ra in bone showed high values, and the differences between these time points were not significant. Therefore, 227Th-EDTMP is a potential radiotherapeutic agent for bone metastasis.
AuthorsKohshin Washiyama, Ryohei Amano, Jun Sasaki, Seigo Kinuya, Norihisa Tonami, Yoshinobu Shiokawa, Toshiaki Mitsugashira
JournalNuclear medicine and biology (Nucl Med Biol) Vol. 31 Issue 7 Pg. 901-8 (Oct 2004) ISSN: 0969-8051 [Print] England
PMID15464392 (Publication Type: Evaluation Studies, Journal Article, Research Support, Non-U.S. Gov't)
Chemical References
  • 227Th-ethylenediamine-tetramethylenephosphonic acid
  • Organometallic Compounds
  • Organophosphonates
  • Radiopharmaceuticals
Topics
  • Animals
  • Bone Neoplasms (metabolism, radiotherapy)
  • Feasibility Studies
  • Femur (metabolism)
  • Male
  • Metabolic Clearance Rate
  • Mice
  • Mice, Inbred ICR
  • Organ Specificity
  • Organometallic Compounds (chemistry, pharmacokinetics, therapeutic use)
  • Organophosphonates (chemistry, pharmacokinetics, therapeutic use)
  • Radiopharmaceuticals (chemical synthesis, pharmacokinetics, therapeutic use)
  • Tissue Distribution

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