Pharmacokinetics of anti-IL17A and anti-IL22 peptide-antibody bispecific genetic fusions in mice.
Int Immunopharmacol 2014;
18:225-7. [PMID:
24295652 DOI:
10.1016/j.intimp.2013.11.013]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 10/31/2013] [Accepted: 11/12/2013] [Indexed: 10/26/2022]
Abstract
The peptide-antibody (Ab) genetic fusion is a promising technology for targeting multiple antigens in a single Ab-like molecule. We have recently described generation and in vitro characterization of several such genetic fusions, using an interleukin (IL)-17A binding peptide and an anti-IL-22 Ab as a model system. In this study we assessed pharmacokinetic profiles of these model genetic fusions in mice. Specifically an IL-17A binding peptide was fused to either the heavy chain or both the heavy and the light chains of an anti-IL22 human IgG1 (referred to Compounds 1 or 2, respectively). Swiss Webster mice were given a single 10 mg/kg IV dose of Compound 1 or Compound 2 and serum concentrations were measured by a fused molecule immunoassay, in which IL-17A was used as a capture and anti-human IgG was used as a detector. In addition, serum samples were assayed using a total human IgG immunoassay. PK parameters were calculated by non-compartmental modeling. The two genetic fusions had similar PK profiles, with total body clearance of ~0.9-1.0 mL/h/kg, volume of distribution at steady-state of ~63-65 mL/kg, and elimination half-life of ~40 h. Our study provides the first characterization of the PK properties of peptide-Ab genetic fusions and suggests that although these genetic fusions appear to be eliminated faster than a typical Ab, the PK profile may be suitable for preclinical and clinical testing.
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