Abstract
Radioiodinated fenoterol and reproterol were prepared by electrophilic radioiodination reaction using chloramin-T as oxidizing agent with radiochemical yields of 97.7 ± 0.7 and 95.2 ± 0.3 %, respectively, and in vitro stability up to 72 h. Biodistribution study performed in male Albino Swiss mice showed maximum radioactivity accumulation in lungs tissue to the extent of 52 ± 1.03 and 50.6 ± 1.2 % ID/g at 15 and 30 min post injection (p.i.) for radioiodinated fenoterol and reproterol, respectively, with low accumulation in heart and blood. The clearance pathway of both iodo-compounds was through renal and hepatobiliary routes. The selectivity of iodo-compounds to lung was examined by in vivo receptor blocking study. Radioiodinated fenoterol and reproterol are not a blood products and so they are more safer than the currently available 99mTc-MAA, and their lungs uptake is higher than that of the recently discovered 125/123I-IPMPD, 99mTc(CO)5I, 99mTc-DHPM and 125/123I-paroxetine. So, radioiodinated fenoterol and reproterol could be introduced as a new compromising radiopharmaceuticals for lung perfusion scintigraphy more safe than the currently available 99mTc-MAA and more potential than the recently discovered 125/123I-IPMPD, 99mTc(CO)5I, 99mTc-DHPM and 125/123I-paroxetine.
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Swidan, M.M., Sakr, T.M., Motaleb, M.A. et al. Preliminary assessment of radioiodinated fenoterol and reproterol as potential scintigraphic agents for lung imaging. J Radioanal Nucl Chem 303, 531–539 (2015). https://doi.org/10.1007/s10967-014-3328-2
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DOI: https://doi.org/10.1007/s10967-014-3328-2