CD40LG and systemic lupus erythematosus: sP-selectin (Table 2c) levels in SLE patients correlated directly with the titers of anti-dsDNA antibodies (r = 0.43, p = 0.03) and with the blood levels of IgA (r = 0.35, p = 0.031) and IgM (r = 0.47, p = 0.003).