Re. Gibson et al., RECEPTOR-BINDING RADIOTRACERS FOR THE ANGIOTENSIN-II RECEPTOR - RADIOIODINATED [SAR(1),ILE(8)]ANGIOTENSIN-II, Nuclear medicine and biology, 21(4), 1994, pp. 593-600
The potential for imaging the angiotensin II receptor was evaluated us
ing the radioiodinated peptide antagonist [I-125][Sar(1),Ile(8)]angiot
ensin II. The radioligand provides a receptor-mediated signal in sever
al tissues in rat (kidneys, adrenal and liver). The receptor-mediated
signal of 3% ID/g kidney cortex should be sufficient to permit imaging
, at least via SPECT. The radiotracer is sensitive to reductions in re
ceptor concentration and can be used to define in viva dose-occupancy
curves of angiotensin II receptor ligands. Receptor-mediated images of
[I-123][Sar(1),Ile(8)]angiotensin II were obtained in the rat kidney
and Rhesus monkey liver.