MCT1 showed higher levels of expression in all tested MM cell lines (cycle threshold [Ct] value: 17.9 ± 1) compared to the other genes which exhibited lower levels of expression (Ct values: 31.2 ± 0.9 for MCT4 and 31.4 ± 1.2 for GPR81; Figure 1B). This evidence concerns the gene HCAR1 and Miyoshi myopathy.