SH2D1A and systemic lupus erythematosus: Similarly, SAP staining intensity was more significant in CD4 and CD8 T cells in SLE (MFI 6750.8 ± 423.3 vs. 5065.9 ± 488.6, p=0.02 and 5301.8 ± 311.6 vs. 4069.9 ± 265.1, p=0.05 respectively) (Figure 1A).