A comparative study of the iron-clearing properties of desferrithiocin
analogues with desferrioxamine B in a Cebus monkey model
RJ Bergeron, RR Streiff, EA Creary, RD Daniels , W King, G Luchetta, J Wiegand, T Moerker and HH Peter
Department of Medicinal Chemistry, Medicine, University of Florida,
Gainesville 32610-0485.
A comparative study of the iron-clearing properties of subcutaneously
administered desferrioxamine B (DFO) with those of orally administered
desferrithiocin sodium salt (1), desmethyl desferrithiocin (2),
desazadesmethyl desferrithiocin sodium salt (3), desazadesmethyl
desferrithiocin pivaloyloxymethyl ester (4), and desazadesmethyl-5,5-
dimethyl desferrithiocin (5) in an iron-loaded Cebus monkey model and a
non-iron overloaded bile duct-cannulated rat model is presented. All six
drugs, which performed well in rodent studies, demonstrated increased
efficiency in the Cebus monkey model. When administered to rodents at a
daily dosage of 384 mumol/kg over a period of 10 days, drug 1 demonstrated
severe renal toxicity. whereas drugs 3, 4, and 5 exhibited severe
gastrointestinal (GI) toxicity. Under the same experimental protocol, drug
2 did not show significant toxic side effects. In addition, to further
evaluate the iron-clearing properties of analogue 2, a dose-response study
was performed in the primates that showed that iron excretion increased in
a dose-dependent fashion.
Volume 81,
Issue 8,
pp. 2166-2173,
04/15/1993
Copyright © 1993 by The American Society of Hematology