Tipiracil
Function
DrugBank ID:
Description:
Tipiracil is a thymidine phosphorylase inhibitor. It is used in combination with trifluridine, in a ratio of 1:0.5, to form TAS-102. The main function of Tipiracil in TAS-102 is to increase trifluridine bioavailability by inhibiting its catabolism.TAS-102 is indicated for the treatment of metastatic colorectal cancer which has been previously treated with fluoropyrimidine-, oxaliplatin- and irinotecan-based chemotherapy, or with an anti-VEGF or anti-EGFR therapy. [DrugBank]
Targets:
Thymidine phosphorylase (Humans) [DrugBank]
Pharmacodynamics:
Tipiracil prevents trifluridine conversion into 5-trifluoromethyl-2,4(1H,3H)-pyrimidinedione, which is an inactive major metabolite, by inhibiting the enzyme thymidine phosphorylase. Thus, tipiracil is able to increase trifluridine bioavailability. On the other hand, thymidine phsophorylase is a known platelet-derived endothelial cell growth factor and its inhibition generates an indirect antiangiogenic benefit.3 [DrugBank]
Structures
Docking in target protein
Off-target analysis based on ligand similarity (Homo sapiens)
Step 1 - Target prediction for Tipiracil: SwissTargetPrediction
Tips: Click on the link to jump to the 'SwissTargetPrediction' webserver. Select the species of 'Homo sapiens', and then paste the SMILES of Tipiracil in the SMILES input box.
Step 2 - Blind docking for Tipiracil: CB-Dock
Tips: Click on the link to jump to the 'CB-Dock' webserver. Upload the structure file of target predicted by 'SwissTargetPrediction' and the 2D/3D structure file of Tipiracil to perform blind docking.