An inhibitor of GGT used for solid tumor researchAcivicin is an antineoplastic antibiotic believed to act by interfering with glutamine metabolism which has been administered for research in a variety of solid tumors. Bone marrow depression and central neurotoxicity has been observed to sμggest that it may be dose-limiting. Acivicin is an irreversible inhibitor of GGT (γ-glutamyl transpeptidase) ID50 = 0.54 mM. Additionally, it inhibits the enzymatic conversion of leukotriene C4 to leukotriene D4 and the bioactivation and release of nitric oxide from GSNO6. Also, the product displays anti tumor and anti-metastatic activity and blocks H. Pylori GGT-induced T-cell inhibition. An inhibitor of GGT used for solid tumor research Acivicin is an antineoplastic antibiotic believed to act by interfering with glutamine metabolism which has been administered for research in a variety of solid tumors. Bone marrow depression and central neurotoxicity has been observed to suggest that it may be dose-limiting. Acivicin is an irreversible inhibitor of GGT (γ-glutamyl transpeptidase) ID50 = 0.54 mM. Additionally, it inhibits the enzymatic conversion of leukotriene C4 to leukotriene D4 and the bioactivation and release of nitric oxide from GSNO6. Also, the product displays anti tumor and anti-metastatic activity and blocks H. Pylori GGT-induced T-cell inhibition.