▁bi opol ym ers . ▁The ▁damage ▁done ▁by ▁H 2 O 2 ▁creates ▁a ▁c yt ot ox ic ▁met abol ite ▁from ▁a ▁non to xic ▁prod rug ▁within ▁the ▁tum or ▁cells , ▁which ▁then ▁creates ▁a ▁to xic ▁subst ance ▁in ▁those ▁cells ▁alone . ▁This ▁process ▁is ▁benef icial ▁for ▁cancer ▁patients , ▁because ▁this ▁treatment ▁is ▁to xic ▁only ▁to ▁tum or ▁cells , ▁while ▁chem other apy ▁is ▁to xic ▁to ▁all ▁cells ▁in ▁the ▁patient ' s ▁body . ▁D - am ino ▁acid ▁ox id ase ▁also ▁plays ▁a ▁role ▁in ▁ 4 - M eth yl th io - 2 - ox ob ut y ric ▁acid ▁( M TO BA ) ▁production , ▁which ▁is ▁used ▁as ▁an ▁ant ican cer ▁drug ▁which ▁indu ces ▁apo pt osis ▁of ▁cancer ▁cells . ▁ ▁Th era pe ut ic ▁treat ments ▁▁ ▁D - am ino ▁acid ▁ox id ase ▁is ▁used ▁in ▁th era pe ut ic ▁treat ments ▁such ▁as ▁reg ulation ▁of ▁h orm ones , ▁reg ulation ▁of ▁hy pert ension , ▁treatment ▁of ▁sch iz op hren ia , ▁ ▁treatment ▁of ▁psych iat ric ▁and ▁cogn itive ▁dis orders , ▁and ▁possible ▁pain ▁reduction . ▁Ch anging ▁the ▁amount ▁of ▁D - am ino ▁acid ▁ox id ase ▁trans por ters ▁with ▁the ▁use ▁of ▁dru gs ▁has ▁th era pe ut ic ▁effects ▁on ▁sch iz op hren ia . ▁D - am ino ▁acid ▁ox