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- W2051498052 abstract "Anti-drug antibody (ADA) responses are a concern for both drug efficacy and safety, and high drug concentrations in patient samples may inhibit ADA assays. We evaluated strategies to improve drug tolerance of surface plasmon resonance (SPR) assays that detect ADAs against a bispecific Adnectin drug molecule that consists of an anti-VEGFR2 domain linked to an anti-IGF-1R domain (V-I-Adnectin). Samples containing ADAs against V-I-Adnectin and various drug concentrations were tested in the presence of 1 M guanidine hydrochloride (Gdn), at pH values ranging from 4.5 to 7.4 and temperatures of up to 37 °C. Temperature had a negligible effect in weakening the affinity of interaction of monoclonal antibodies with polyethylene glycol(PEG)–V-I-Adnectin and did not increase drug tolerance of the ADA assay. Low pH increased drug tolerance of the assay relative to pH 7.4 but caused nonspecific binding of the drug during competition experiments. The chaotropic agent Gdn lowered the affinity of interaction between an anti-V-Adnectin monoclonal antibody and the drug (from KD = 0.93 nM to KD = 348 nM). That decrease in the affinity of drug–ADA interaction correlated with an increase of assay drug tolerance. Conditions that lower drug–ADA interaction affinity could also be used to develop drug-tolerant SPR assays for other systems." @default.
- W2051498052 created "2016-06-24" @default.
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- W2051498052 date "2013-10-01" @default.
- W2051498052 modified "2023-09-27" @default.
- W2051498052 title "Altering drug tolerance of surface plasmon resonance assays for the detection of anti-drug antibodies" @default.
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- W2051498052 doi "https://doi.org/10.1016/j.ab.2013.07.019" @default.
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