Cross-species binding analyses of mouse and human neonatal Fc receptor show dramatic differences in immunoglobulin G and albumin binding.
Andersen, Jan Terje; Daba, Muluneh Bekele; Berntzen, Gøril; Michaelsen, Terje Einar & Sandlie, Inger (2010).
Journal of Biological Chemistry. ISSN 0021-9258. 285(7), s 4826- 4836 . doi: 10.1074/jbc.M109.081828
Pub type: Third Party (Oslo) VELTIS (Species Specificity Paper)
"The neonatal Fc receptor (FcRn) regulates the serum half-life of both IgG and albumin through a pH-dependent mechanism that involves salvage from intracellular degradation. Therapeutics and diagnostics built on IgG, Fc, and albumin fusions are frequently evaluated in rodents regarding biodistribution and pharmacokinetics. Thus, it is important to address cross-species ligand reactivity with FcRn, because in vivo testing of such molecules is done in the presence of competing murine ligands, both in wild type (WT) and human FcRn (hFcRn) transgenic mice."