CD8A and microscopic polyangiitis: Differential abundance analysis revealed that the proportion of CD8 T_CTL (median log2 fold changes: +0.40) and CD8 T_KIR (+0.85) subsets were increased, while the proportion CD8 T_Naïve (median log2 fold changes: −0.95) and CD8 T_EM (−0.35) subsets were decreased in patients with MPA (Fig. 2g, h).