Acivicin

Acivicin is an analog of glutamine. It is an inhibitor of gamma-glutamyl transferase. Acivicin is an analog of glutamine. It is an inhibitor of gamma-glutamyl transferase. It is a fermentation product of Streptomyces sviceus. It interferes with glutamate metabolism and inhibits glutamate dependent synthesis of enzymes, and is thereby potentially helpful in treatment of solid tumors. After its discovery in 1972, acivicin was studied as an anti-cancer agent, but trials were unsuccessful due to toxicity. An in vitro study showed that Acivicin at a concentration of 5 µM Acivicin inhibited by 78% the growth of human pancreatic carcinoma cells (MIA PaCa-2) after 72 hours in continuous culture. It was also found that acivicin at a concentration of 450 µM irreversibly inactivated MIA PaCa-2 γ-glutamyl transpeptidase (10 nmol/min/106 cells) with an inactivation half-life of 80 minutes.