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Acivicin structure.svg
IUPAC name
(2S)-Amino[(5S)-3-chloro-4,5-dihydro-1,2-oxazol-5-yl]ethanoic acid
Other names
Antibiotic AT 125
42228-92-2 N
ChEMBL ChEMBL1231101 N
ChemSpider 259938 YesY
Jmol interactive 3D Image
PubChem 294641
UNII O0X60K76I6 YesY
Molar mass 178.574
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

Acivicin is an inhibitor of gamma-glutamyl transferase. It is fermented product of Streptomyces sviceus and has promise as an antineoplastic agent.[1] It interferes with glutamate metabolism and inhibits glutamate dependent synthesis of enzymes, and is thereby potentially helpful in treatment of solid tumors.[2]


In vivo studies have 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.[1]

Phase I studies[edit]

Phase I dose escalating studies conducted in 23 cancer patients administered acivicin with a concomitant 96-h i.v. infusion of a mixture of 16 amino acids showed reversible, dose-limiting CNS toxicity, characterized by lethargy, confusion and decreased mental status.


  1. ^ a b Allen, L.; Meck, R.; Yunis, A. (1980). "The Inhibition of γ-Glutamyl Transpeptidase from Human Pancreatic Carcinoma Cells by (αS,5S)-α-Amino-3-chloro-4,5-dihydro-5-isoxazoleacetic Acid (AT-125; NSC-163501)". Research Communications in Chemical Pathology and Pharmacology 27 (1): 175–182. PMID 6102405. 
  2. ^ Hidalgo, M.; Rodriguez, G.; Kuhn, J. G.; Brown, T.; Weiss, G.; MacGovren, J. P.; von Hoff, D. D.; Rowinsky, E. K. (1998). "A Phase I and Pharmacological Study of the Glutamine Antagonist Acivicin with the Amino Acid Solution Aminosyn in Patients with Advanced Solid Malignancies". Clinical Cancer Research 4 (11): 2763–2770. PMID 9829740. 

External links[edit]

  • Obrador, E.; Carretero, J.; Ortega, A.; Medina, I.; Rodilla, V.; Pellicer, J. A.; Estrela, J. M. (2002). "γ-Glutamyl Transpeptidase Overexpression Increases Metastatic Growth of B16 Melanoma Cells in the Mouse Liver". Hepatology 35 (1): 74–81. doi:10.1053/jhep.2002.30277. PMID 11786961. 
  • Schmees, C.; Prinz, C.; Treptau, T.; Rad, R.; Hengst, L.; Voland, P.; Bauer, S.; Brenner, L.; Schmid, R. M.; Gerhard, M. (2007). "Inhibition of T-Cell Proliferation by Helicobacter pylori γ-Glutamyl Transpeptidase". Gastroenterology 132 (5): 1820–1833. doi:10.1053/j.gastro.2007.02.031. PMID 17484877.