HK2 and neoplasm: Glycolysis dysregulation is caused by abnormal expression of glycolysis-related enzymes, including hexokinase 2 (HK2), phosphoglycerate mutase 1 (PGAM1), pyruvate kinase M2 (PKM2), pyruvate dehydrogenase (PDH) complex, and lactate dehydrogenase (LDH), which contributes to tumorigenesis, tumor growth, and tumor therapeutic resistance [196,197,198,199,200].