Technetium-99m galactosyl-neoglycoalbumin: preparation and preclinical studies

Journal Article · Tue Oct 01 00:00:00 EDT 1985 · J. Nucl. Med.; (United States)

OSTI ID:6194578

Vera, D R; Stadalnik, R C; Krohn, K A

Technetium-99m galactosyl-neoglycoalbumin ((Tc) NGA), a labeled analog ligand to the hepatocyte-specific receptor, hepatic binding protein (HBP), was prepared and tested for labeling yield, stability, biodistribution, toxicity, and dosimetry. The ligand was synthesized by the covalent coupling of a carbohydrate bifunctional reagent, 2-imino-2-ethyloxymethyl-1-thiogalactose, to human serum albumin. Testing in mice and rabbits revealed the product to be nontoxic and apyrogenic. Biodistribution studies in rabbits demonstrated the liver as the single focus of tracer uptake. Dosimetry was based on kinetic studies in three baboons. Absorbed doses to liver, small intestine, urinary bladder wall, and uterus were 0.089, 0.28, 0.56, and 0.88 rad/mCi, respectively. Total body, lens of the eye, red marrow, ovaries, and testes were less than 0.06 rad/mCi. High liver specificity imparted by receptor binding combined with high labeling yield, stability, acceptable dosimetry, and safety provide (Tc)NGA with the attributes required for routine clinical assessment of hepatocyte function.

• Research Organization: Univ. of California, Davis
• OSTI ID: 6194578
• Journal Information: J. Nucl. Med.; (United States), Vol. 10
• Country of Publication: United States
• Language: English

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