ANXA5 and systemic lupus erythematosus: By performing Annexin V/7–AAD double-staining flow cytometric analysis, we found that the apoptosis rate of peripheral Vδ2 T cells in new-onset SLE patients was not increased but rather was decreased compared with that in HC (0.86 ± 0.27% vs. 1.66 ± 0.46%, p < 0.01) (Fig. 2A).