Monoclonal antibody F(ab')2 fragment labeled with N-succinimidyl 2,4-dimethoxy-3-halobenzoates: in vivo comparison of iodinated and astatinated fragments.
Journal Article (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 1994
Published In
Volume / Issue
- 21 / 1
Start / End Page
- 105 - 110
PubMed ID
- 9234271
International Standard Serial Number (ISSN)
- 0969-8051
Digital Object Identifier (DOI)
- 10.1016/0969-8051(94)90136-8
Language
- eng
Conference Location
- United States