Reslizumab

Reslizumab (Sch 55700) is humanized monoclonal antibodies that target interleukin-5 (IL-5) for the treatment of eosinophilic asthma. Reslizumab is effective in neutralizing the function of IL-5. Reslizumab has high binding affinity for human IL-5, with K_D values of 109 pM and 4.3 pM in the the Biacore surface plasmon resonance and Kinetic Exclusion Assay, respectively^[1][2]. IC50 & Target: IC50: 91.1pM (IL-5-dependent cell proliferation)^[1] In Vitro: Reslizumab (Sch 55700) (0-10 nM, 48 h) inhibits IL-5-dependent cell proliferation, with an IC₅₀ value of approximately 91.1pM^[1]. In Vivo: Reslizumab (Sch 55700) (0-10 mg/kg; i.p. or i.m.) inhibits pulmonary eosinophilia in a dose-dependent manner in allergic mice^[3].
Reslizumab (0.03-30 mg/kg; i.p.) inhibits both the pulmonary eosinophilia and airway hyperresponsiveness, and at 30 mg/kg, i.p. inhibits allergic, but not histamine-induced bronchoconstriction in allergic guinea pigs^[3].
Reslizumab (0.1-1 mg/kg; i.p.) blocks the pulmonary eosinophilia and neutrophilia caused by tracheal injection of hIL-5 in guinea pigs^[3].
Reslizumab (0.3 mg/kg; i.v.) blocks the pulmonary eosinophilia caused by antigen challenge for up to six months in allergic cynomolgus monkeys^[3].