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The Generation of a Nanobody-Based ELISA for Human Microsomal Epoxide Hydrolase
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The Generation of a Nanobody-Based ELISA for Human Microsomal Epoxide Hydrolase
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Journal Article
The Generation of a Nanobody-Based ELISA for Human Microsomal Epoxide Hydrolase
2023
Overview
A microsomal epoxide hydrolase (mEH) metabolizes in vivo in both xenobiotic and endogenous epoxides associated with signaling function. Findings in patients suggest that mEH might be a biomarker for several diseases, including metastatic cancer and viral hepatitis. To easily quantify mEH, nanobodies specific to the human mEH were isolated from a phage library of llama VHHs. Four unique clones were obtained and used for developing ELISAs. Three formats of double antibody sandwich assays were investigated using different detection strategies. Using PolyHRP, the signal was strongly amplified, yielding a 22-fold lower LOD (12 pg mL−1) than the ‘conventional’. To further validate the performance of the immunoassays, human tissue samples were analyzed by nanobody-based ELISAs and compared to the enzyme activities (R2 > 0.95). The results demonstrate that these nanobodies are powerful tools for the quantification of human mEH and could eventually result in a bedside assay.
Publisher
MDPI AG,MDPI
Subject
