Labeling proteins with fluorine-18 using N-succinimidyl 4-[18F]fluorobenzoate.


Journal Article

Two methods were investigated for the no-carrier-added synthesis of N-succinimidyl 4-[18F]fluorobenzoate (S[18F]FB). The first, an attempted nucleophilic aromatic substitution by [18F]fluoride on N-succinimidyl 4-nitrobenzoate was unsuccessful. The second method involved three steps; [18F]fluoride for trimethylammonium substitution on 4-formyl-N,N,N-trimethylanilinium triflate, oxidation to 4-[18F]fluorobenzoic acid, followed by reaction with N-hydroxysuccinimide and dicyclohexylcarbodiimide to form S[18F]FB. Total synthesis and purification time was 100 min and the overall radiochemical yield was 25% (decay corrected). A monoclonal antibody F(ab')2 fragment could be labeled in 40-60% yield by reaction with S[18F]FB for 15-20 min. The tissue distribution in normal mice and in vitro tumor binding of the antibody F(ab')2 labeled by reaction with S[18F]FB were comparable to those observed for the fragment after radioiodination using N-succinimidyl 4-[125I]iodobenzoate.

Full Text

Duke Authors

Cited Authors

  • Vaidyanathan, G; Zalutsky, MR

Published Date

  • April 1, 1992

Published In

Volume / Issue

  • 19 / 3

Start / End Page

  • 275 - 281

PubMed ID

  • 1629016

Pubmed Central ID

  • 1629016

International Standard Serial Number (ISSN)

  • 0883-2897


  • eng

Conference Location

  • England