Protein-lysine 6-oxidase, also known as LOX, produces H2O2 as a byproduct during crosslinking between cell-matrix protein elastin and collagen using the lysyl tyrosylquinone cofactor.78 The enzyme is regulated by Hif-1 or Hif-2 and generates ROS and induces metastasis and cell-matrix adhesion via the FAK/Src signaling pathway in both ischemia and glioma.79–82. Here, LOX is linked to central nervous system cancer.