TITLE

Development of a competitive ELISA for the quantification of F5 conjugate in HER2-targeted STEALTH immunoliposome doxorubicin in plasma samples

AUTHOR(S)
Ran Hu; Rebecca Davis; Yongjin Yao; Yaodong Xu
PUB. DATE
December 2006
SOURCE
Analytical & Bioanalytical Chemistry;Dec2006, Vol. 386 Issue 6, p1657
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
HER2 (human epidermal growth factor receptor 2, erbB2, or neu) is overexpressed by a large number of tumor types and has been identified as an important target for cancer therapy. F5 is a single-chain human antibody fragment that recognizes HER2 receptor and is covalently conjugated to PEGylated lipid to form F5 conjugate (F5CG) in the product HER2 targeted STEALTH immunoliposome doxorubicin. Here we described the method development of a competitive enzyme-linked immunosorbent assay (ELISA) for the determination of total concentration of F5 conjugate in plasma samples. The method involved the biotinylation of F5CG, detergent treatment of plasma sample to solubilize F5CG into monomeric form, and competitive ELISA for solubilized F5CG competitively binding to anti-F5CG antibody with biotinylated F5CG for the determination of total F5CG in plasma. The detection range of this method was from 0.2 ng/mL to 125 ng/mL for F5CG in plasma. The lower limit of quantification (LLOQ) was 0.2 ng/mL. This method was established and used for the measurement of F5CG concentration to provide information about F5CG circulation after the administration of immunoliposome in preclinical studies. [Figure not available: see fulltext.]
ACCESSION #
23150757

 

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