MeSH definition : An IgG autoantibody against the ALTERNATIVE PATHWAY C3 CONVERTASE, found in serum
of patients with MESANGIOCAPILLARY GLOMERULONEPHRITIS. The binding of this autoantibody
to C3bBb stabilizes the enzyme thus reduces the actions of C3b inactivators (COMPLEMENT
FACTOR H; COMPLEMENT FACTOR I). This abnormally stabilized enzyme induces a continuous
COMPLEMENT ACTIVATION and generation of C3b thereby promoting the assembly of MEMBRANE
ATTACK COMPLEX and cytolysis.;
An IgG autoantibody against the ALTERNATIVE PATHWAY C3 CONVERTASE, found in serum
of patients with MESANGIOCAPILLARY GLOMERULONEPHRITIS. The binding of this autoantibody
to C3bBb stabilizes the enzyme thus reduces the actions of C3b inactivators (COMPLEMENT
FACTOR H; COMPLEMENT FACTOR I). This abnormally stabilized enzyme induces a continuous
COMPLEMENT ACTIVATION and generation of C3b thereby promoting the assembly of MEMBRANE
ATTACK COMPLEX and cytolysis.