| First Author | Crow AR | Year | 2011 |
| Journal | Blood | Volume | 118 |
| Issue | 24 | Pages | 6403-6 |
| PubMed ID | 22001393 | Mgi Jnum | J:179078 |
| Mgi Id | MGI:5301043 | Doi | 10.1182/blood-2011-08-374223 |
| Citation | Crow AR, et al. (2011) The neonatal Fc receptor (FcRn) is not required for IVIg or anti-CD44 monoclonal antibody-mediated amelioration of murine immune thrombocytopenia. Blood 118(24):6403-6 |
| abstractText | To definitively determine whether the neonatal Fc receptor (FcRn) is required for the acute amelioration of immune thrombocytopenia (ITP) by IVIg, we used FcRn-deficient mice in a murine ITP model. Mice injected with antiplatelet antibody in the presence or absence of IVIg displayed no difference in platelet-associated IgG between FcRn deficient versus C57BL/6 mice. FcRn-deficient mice treated with high-dose (2 g/kg) IVIg or a low-dose (2 mg/kg) of an IVIg-mimetic CD44 antibody were, however, protected from thrombocytopenia to an equivalent extent as wild-type mice. To verify and substantiate the results found with FcRn-deficient mice, we used beta(2)-microglobulin-deficient mice (which do not express functional FcRn) and found that IVIg or CD44 antibody also protected them from thrombocytopenia. These data suggest that for both high-dose IVIg as well as low-dose CD44 antibody treatment in an acute ITP model, FcRn expression is neither necessary nor required. |
