Summary
The blood clearances of three platinum compounds, cis-dichlorodiammine platinum II (DDP), cis, trans-dichlorodihydroxy-bis-(isopropylamine) platinum IV (CHIP), and cis-dichloro-bis-cyclopropylamine platinum II (CP), were determined in nine patients with malignant disease. The complexes were prepared using radioactive platinum (191Pt and 193Pt). A 10-μCi dose of each complex, containing the equivalent of 1–2 mg elemental platinum, was injected IV into groups of three patients. Serial blood and urine samples were collected over 72 h.
No obvious difference was found between the three complexes for blood clearance, median t1/2α being 16.8 (range 11.2–23.5) min and median t1/2β 89 (range 63.7–127) h. The urinary excretion was greatest for CHIP, 60% of injected dose as against 42.6% for CP and 38.8% for DDP.
Differences in renal excretion of DDP analogues could indicate potentially less nephrotoxic agents. The use of radioactive Pt will allow in vivo dynamic imaging of the distribution of platinum compounds in areas of interest.
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Thatcher, N., Sharma, H., Harrison, R. et al. Blood clearance of three radioactively labelled platinum complexes: cis-dichlorodiammine platinum II, cis, trans-dichlorodihydroxy-bis-(isopropylamine) platinum IV, and cis-dichloro-bis-cyclopropylamine platinum II, in patients with malignant disease. Cancer Chemother. Pharmacol. 9, 13–16 (1982). https://doi.org/10.1007/BF00296754
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DOI: https://doi.org/10.1007/BF00296754