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- W2896946013 abstract "Engineered monoclonal antibodies (mAbs) with pH-sensitive target release, or catch-and-release (CAR) binding, have shown promise in decreasing the extent of target-mediated mAb elimination, increasing mAb exposure, and increasing dose potency. This study developed a mechanistic physiologically based pharmacokinetic (PBPK) model to evaluate the effects of pH-sensitive CAR target binding on the disposition of anti-carcinoembryonic antigen (CEA) mAbs in mouse models of colorectal cancer. The PBPK model was qualified by comparing model-predicted plasma concentration-time data with data observed in tumor-bearing mice following the administration of T84.66, a standard anti-CEA mAb that demonstrates strong binding at pH 7.4 and 5.5. Further simulations evaluated the effects CAR pH-dependent binding, with decreasing CEA affinity with decreasing pH, on anti-CEA mAb plasma pharmacokinetics. Simulated data were compared with data observed for a novel CAR mAb, 10H6. The PBPK model provided precise parameter estimates, and excellent data characterization (median prediction error 18.4%) following fitting to T84.66 data. Simulations well predicted 10H6 data (median prediction error 21.4%). Sensitivity analyses demonstrated that key determinants of the disposition of CAR mAbs include the following: antigen binding affinity, the rate constant of mAb-CEA dissociation in acidified endosomes, antigen concentration, and the tumor vasculature reflection coefficient." @default.
- W2896946013 created "2018-10-26" @default.
- W2896946013 creator A5006628846 @default.
- W2896946013 creator A5006940157 @default.
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- W2896946013 date "2019-01-01" @default.
- W2896946013 modified "2023-10-13" @default.
- W2896946013 title "Physiologically Based Modeling of the Pharmacokinetics of “Catch-and-Release” Anti-Carcinoembryonic Antigen Monoclonal Antibodies in Colorectal Cancer Xenograft Mouse Models" @default.
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- W2896946013 doi "https://doi.org/10.1016/j.xphs.2018.09.037" @default.
- W2896946013 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6311433" @default.
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