CD40LG and systemic lupus erythematosus: The analysis of anti-GM1, -GM2, -GM3, -GD1a, -GD1b, -GT1b, -GQ1b, IgG and IgM antibodies in patients with SLE, LN and control group, showed an interdependence between the modified sialylation of gangliosides and AGA synthesis rate in patients versus control.