Tc-99m-galactosyl-neoglycoalbumin: In vivo characterization of receptor-mediated binding to hepatocytes

D. R. Vera, K. A. Krohn, R. C. Stadalnik, P. O. Scheibe

Research output: Contribution to journalArticlepeer-review

110 Scopus citations


The biodistribution and kinetics of a receptor-binding hepatic radiopharmaceutical, Tc-99m-galactosyl-neoglycoalbumin (Tc-NGA), were investigated using mammalian and avian models. The radiopharmaceutical exhibited four significant features associated with receptor-mediated binding at the hepatocyte membrane in mammals: (a) high tissue specificity, (b) high molecular specificity, (c) affinity-dependent uptake, and (d) dose-dependent uptake. Diminished hepatic uptake by the avian model illustrated low nonspecific binding. The kinetic sensitivity to ligand-receptor affinity and stoichiometry illustrated the principal feature of receptor-binding radiopharmaceuticals, namely, quantitative assessment of tissue function based upon the biochemical interaction of a ligand and its specific receptor.

Original languageEnglish (US)
Pages (from-to)191-196
Number of pages6
Issue number1
StatePublished - 1984
Externally publishedYes

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging


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