Monoclonal antibody F(ab')2 fragment labeled with N-succinimidyl 2,4-dimethoxy-3-halobenzoates: in vivo comparison of iodinated and astatinated fragments.

Published

Journal Article

N-Succinimidyl 3-[211At]astato-2, 4-dimethoxybenzoate (SADMB) was prepared from a trialkylstannyl precursor in about 70-75% yield. With either trimethyl or tri-n-butylstannyl precursor, no temporal effect was found in the astatodestannylation yield. However, the methyl analog gave slightly better yield which was found to be not statistically significant. A monoclonal antibody (MAb) fragment, Mel-14 F(ab')2, could be labeled using SADMB in 28% coupling efficiency. The specific binding of this labeled fragment to tumor homogenates in vitro was 61.0 +/- 0.5% (62.8 +/- 0.9% for the 131I labeled fragment). Paired-label tissue distribution in normal mice showed similar uptake of 131I and 211 At in many tissues. However, by 14.5 h selectivity of spleen, lungs and stomach for Mel-14 F(ab')2 labeled with 211At compared to 131I was 4.1, 3.8 and 6.4, respectively.

Full Text

Duke Authors

Cited Authors

  • Vaidyanathan, G; Affleck, D; Zalutsky, MR

Published Date

  • January 1, 1994

Published In

Volume / Issue

  • 21 / 1

Start / End Page

  • 105 - 110

PubMed ID

  • 9234271

Pubmed Central ID

  • 9234271

International Standard Serial Number (ISSN)

  • 0969-8051

Language

  • eng

Conference Location

  • United States