Using the q-PCR approach, we demonstrated that the mRNA expression of glucose transporters (e.g., GlUT1, GLUT3, GLUT4, GLUT8) and the key genes of insulin signaling (e.g., INSR, INS1, INS2, AKT, FOXO1) were significantly decreased in GDM placentas (Fig. 1G-H). The gene discussed is SLC2A1; the disease is gestational diabetes.