No differences between the groups were detected in the relative gene expression of (1) FATP4 (0.86 ± 0.06, 0.8 ± 0.07, 0.82 ± 0.05, and 0.79 ± 0.03 for control, OSA, T2DM, and T2DM + OSA groups, respectively, all p > 0.05), (2) CD36 (41.6 ± 3.1, 40.1 ± 4.0, 39.1 ± 2.7, and 36.3 ± 3.4, for control, OSA, T2DM, and T2DM + OSA groups, respectively, all p > 0.05), and (3) CPT1 (0.076 ± 0.007, 0.070 ± 0.008, 0.085 ± 0.010, and 0.080 ± 0.006, for the control, OSA, T2DM, and T2DM + OSA groups, respectively, all p > 0.05). This evidence concerns the gene SLC27A4 and obstructive sleep apnea syndrome.