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Zhu, Min; Olson, Kara; Kirshner, Jessica R.; Khaksar Toroghi, Masood; Yan, Hong; Haber, Lauric; Meagher, Craig; Flink, Dina M.; Ambati, Srikanth R.; Davis, John D.; DiCioccio, A. Thomas; Smith, Eric J.; Retter, Marc W.
Clinical and translational science, April 2022, Letnik: 15, Številka: 4Journal Article
Odronextamab is a fully‐human IgG4‐based CD20xCD3 bispecific antibody that binds to CD3 on T cells and CD20 on B cells, triggering T‐cell‐mediated cytotoxicity independent of T‐cell‐receptor recognition. Adequate safety, tolerability, and encouraging durable complete responses have been observed in an ongoing first‐in‐human (FIH) study of odronextamab in patients with relapsed/refractory (R/R) B‐cell non‐Hodgkin lymphoma (B‐NHL; NCT02290951). We retrospectively evaluated the pharmacokinetic, pharmacodynamic, and antitumor characteristics of odronextamab in a series of in vitro/in vivo preclinical experiments, to assess their translational value to inform dose escalation for the FIH study. Half‐maximal effective concentration values from in vitro cytokine release assays (range: 0.05–0.08 mg/L) provided a reasonable estimate of odronextamab concentrations in patients associated with cytokine release at a 0.5 mg dose (maximum serum concentration: 0.081 mg/L) on week 1/day 1, which could therefore be used to determine the week 1 clinical dose. Odronextamab concentrations resulting in 100% inhibition of tumor growth in a Raji xenograft tumor mouse model (1–10 mg/L) were useful to predict efficacious concentrations in patients and inform dose‐escalation strategy. Although predicted human pharmacokinetic parameters derived from monkey data overestimated projected odronextamab exposure, they provided a conservative estimate for FIH starting doses. With step‐up dosing, the highest‐tested weekly odronextamab dose in patients (320 mg) exceeded the 1 mg/kg single dose in monkeys without step‐up dosing. In conclusion, combination of odronextamab in vitro cytokine data, efficacious concentration data from mouse tumor models, and pharmacokinetic evaluations in monkeys has translational value to inform odronextamab FIH study design in patients with R/R B‐NHL.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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