Synthesis of a Functional Metal-Chelating Polymer and Steps toward Quantitative Mass Cytometry Bioassays
- 12 October 2010
- journal article
- research article
- Published by American Chemical Society (ACS) in Analytical Chemistry
- Vol. 82 (21), 8961-8969
- https://doi.org/10.1021/ac101901x
Abstract
We describe the synthesis and characterization of metal-chelating polymers with a degree of polymerization of 67 and 79, high diethylenetriaminepentaacetic acid (DTPA) functionality, Mw/Mn ≤ 1.17, and a maleimide as an orthogonal functional group for conjugation to antibodies. The polymeric disulfide form of the DPn = 79 DTPA polymer was analyzed by thermogravimetric analysis to determine moisture and sodium-ion content and by isothermal titration calorimetry (ITC) to determine the Gd3+ binding capacity. These results showed each chain binds 68 ± 7 Gd3+ per chain. Secondary goat antimouse IgG was covalently labeled with the maleimide form of the DTPA polymer (DPn = 79) carrying 159Tb. Conventional ICPMS analysis of this conjugate showed each antibody carried an average of 161 ± 4 159Tb atoms. This result was combined with the ITC result to show there are an average of 2.4 ± 0.3 polymer chains attached to each antibody. Eleven monoclonal primary antibodies were labeled with different lanthanide isotopes using the same labeling methodology. Single cell analysis of whole umbilical cord blood stained with a mixture of 11 metal-tagged antibodies was performed by mass cytometry.Keywords
This publication has 20 references indexed in Scilit:
- Highly multiparametric analysis by mass cytometryJournal of Immunological Methods, 2010
- Chitosan modified with gadolinium diethylenetriaminepentaacetic acid for magnetic resonance imaging of DNA/chitosan nanoparticlesCarbohydrate Polymers, 2010
- Polymer‐Based Elemental Tags for Sensitive BioassaysAngewandte Chemie, 2007
- Allyl functionalized telechelic linear polymer and star polymer via RAFT polymerizationPolymer, 2006
- Novel Prognostic Immunohistochemical Biomarker Panel for Estrogen Receptor–Positive Breast CancerJournal of Clinical Oncology, 2006
- Novel synthesis of N‐substituted polyacrylamides: Derivatization of poly(acrylic acid) with amines using a triazine‐based condensing reagentJournal of Polymer Science Part A: Polymer Chemistry, 2005
- Synthesis, Characterization and Behavior in Aqueous Solution of Star‐Shaped Poly(acrylic acid)Macromolecular Chemistry and Physics, 2005
- Biomarkers and surrogate endpoints: Preferred definitions and conceptual frameworkClinical Pharmacology & Therapeutics, 2001
- Stability constants for Gd3+ binding to model DTPA-conjugates and DTPA-proteins: Implications for their use as magnetic resonance contrast agentsMagnetic Resonance in Medicine, 1988
- The thermal behaviour of ethylenediaminetetracetic acid and its sodium saltsThermochimica Acta, 1983