PMID- 17703228 OWN - NLM STAT- MEDLINE DCOM- 20071113 LR - 20231120 IS - 1474-1741 (Electronic) IS - 1474-1733 (Linking) VI - 7 IP - 9 DP - 2007 Sep TI - FcRn: the neonatal Fc receptor comes of age. PG - 715-25 AB - The neonatal Fc receptor for IgG (FcRn) has been well characterized in the transfer of passive humoral immunity from a mother to her fetus. In addition, throughout life, FcRn protects IgG from degradation, thereby explaining the long half-life of this class of antibody in the serum. In recent years, it has become clear that FcRn is expressed in various sites in adults, where its potential function is now beginning to emerge. In addition, recent studies have examined the interaction between FcRn and the Fc portion of IgG with the aim of either improving the serum half-life of therapeutic monoclonal antibodies or reducing the half-life of pathogenic antibodies. This Review summarizes these two areas of FcRn biology. FAU - Roopenian, Derry C AU - Roopenian DC AD - The Jackson Laboratory, 600 Main Street, Bar Harbor, Maine 04609, USA. dcr@jax.org FAU - Akilesh, Shreeram AU - Akilesh S LA - eng PT - Journal Article PT - Review DEP - 20070817 PL - England TA - Nat Rev Immunol JT - Nature reviews. Immunology JID - 101124169 RN - 0 (Histocompatibility Antigens Class I) RN - 0 (Immunoglobulin G) RN - 0 (Receptors, Fc) RN - TW3XAW0RCY (Fc receptor, neonatal) SB - IM MH - Age Factors MH - Antigen-Presenting Cells/immunology MH - Blood-Brain Barrier/immunology MH - Histocompatibility Antigens Class I/chemistry/genetics/*metabolism MH - Humans MH - Immunity, Maternally-Acquired/*immunology MH - Immunoglobulin G/immunology MH - Protein Conformation MH - Receptors, Fc/chemistry/genetics/*metabolism MH - Tissue Distribution RF - 101 EDAT- 2007/08/19 09:00 MHDA- 2007/11/14 09:00 CRDT- 2007/08/19 09:00 PHST- 2007/08/19 09:00 [pubmed] PHST- 2007/11/14 09:00 [medline] PHST- 2007/08/19 09:00 [entrez] AID - nri2155 [pii] AID - 10.1038/nri2155 [doi] PST - ppublish SO - Nat Rev Immunol. 2007 Sep;7(9):715-25. doi: 10.1038/nri2155. Epub 2007 Aug 17.