Characterization of 111In3+ complexes of DTPA amide derivatives: Biodistribution and clearance studied by gamma imaging

Author(s)
Author(s)
Prata, M. I. M.
Santos, A. C.
Chowdhury, A. H. M. S.
Geraldes, C. F. G. C.
de Lima, J. J. P.
Date Issued
2000
Publisher
Elsevier
Journal
Nuclear Medicine and Biology
Volume
27
Issue
6
Start page
605
End page
610
Abstract
A large series of structurally related diethylenetriaminepentaacetic acid amide derivatives with different structures and lipophilic properties were synthesized and radiolabeled with 111In3+). Two of the more hydrophobic compounds studied ([(111)In]L9) and [111)In]L10) showed high affinity for human serum albumin (HSA). The biodistribution and clearance properties shown by all complexes upon injection in Wistar rats were followed by gamma imaging. The blood retention time of the chelates correlates better with their binding to HSA than with their hydrophilic/lipophilic ratio. Hydrophilic and negatively charged complexes undergo renal retention, while the majority of the lipophilic complexes are retained in the blood for a longer period of time and are cleared through the liver.
URI
DOI
SFU Affiliated Publication
No
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