Targeting strategy
Gene targeting strategy for B-FcRn KO mice. The exons of mouse Fcgrt 1-5 were knocked out in B-FcRn KO mice.
mRNA expression analysis
Strain specific analysis of Fcgrt gene expression in C57BL/6(+/+) and B-FcRn KO mice by RT-PCR.Kidney was collected from C57BL/6(+/+) mice and homozygous B-FcRn KO mice. Mouse Fcgrt mRNA was detectable in C57BL/6(+/+) mice but not the homozygous B-FcRn KO mice.
Protein expression analysis
Strain specific analysis of FcRn expression in C57BL/6(+/+) and the homozygous B-FcRn KO mice by western blot.Kidney was collected from C57BL/6(+/+) mice and homozygous B-FcRn KO mice. Mouse FcRn was detectable in C57BL/6(+/+) mice but not the homozygous B-FcRn KO mice.
FcRn-deficient mice have low serum IgG
Sera from C57BL/6(+/+) mice and B-FcRn KO mice were analyzed by ELISA .