CD38 and Miyoshi myopathy: We also observed that the presence of the IKBKErs17433804C allele was associated with increased numbers of transitional CD24+CD38+ B cells (p = 4.8 × 10−4, Figure 1B), whereas carriers of the IKBKErs17433804C/C genotype showed decreased circulating serum concentrations of MCP-2 (p = 3.6 × 10−4; Figure 1C), a chemotactic molecule involved in the activation of multiple immune cells and linked to MM cell migration.