cells were incubated 72h in medium only or completed with IgG (control), anti-CD 160 antibody (CL1-R2), anti-IgM, G, A antibody (PAN antibody) or mix with PAN antibody and CL1-R2. For cytokine expriments, supernatants were taken after 24 hours. (left scale: CPM value, right scale: IL-6 concentration in pg/ml)