FABP4 and diabetic kidney disease: Elevated expression of FABP4 was found in HG-HK2 cells from patients with DKD who showed iron deposition in renal tubules and loss of mitochondrial cristae, whereas Carnitine Palmitoyl transferase 1A(CPT1A), glutathione peroxidase 4, ferritin heavy chain (FTH), and ferritin light chain (FTL) were found to be elevated in HG-HK2 cells from patients with DKD who showed iron deposition in renal tubules and loss of mitochondrial cristae.