CXCR4 and primary biliary cholangitis: Intriguingly, CD3+CD8+ T cells from PBC patients expressed higher levels of CXCR4, but these levels were lower than those in MAIT cells (50.6 ± 20.1% vs. 84.8 ± 18.0%, p < 0.05, Supplementary Figure 7), suggesting that CXCL12 potentially less attracted CD3+CD8+ T cells.