PMID- 22299579 OWN - NLM STAT- MEDLINE DCOM- 20130912 LR - 20211021 IS - 1475-6374 (Electronic) IS - 1475-6366 (Print) IS - 1475-6366 (Linking) VI - 28 IP - 3 DP - 2013 Jun TI - Evaluation of a dithiocarbamate derivative as an inhibitor of human glutaredoxin-1. PG - 456-62 LID - 10.3109/14756366.2011.649267 [doi] AB - CONTEXT: Glutaredoxins (GRX) are involved in the regulation of thiol redox state. GRX-1 is a cytosolic enzyme responsible for the catalysis of deglutathionylation of proteins. To date, very few inhibitors of GRX-1 have been reported. OBJECTIVE: The objective of this paper is to report 2-acetylamino-3-[4-(2-acetylamino-2-carboxyethyl-sulfanylthiocarbonylamino)phenylthiocarbamoylsulfanyl]propionic acid (2-AAPA) as an inhibitor of human GRX-1. MATERIALS AND METHODS: The mechanism of inhibition of GRX-1 was investigated using dialysis, substrate protection, and mass spectrometry. RESULTS: 2-AAPA inhibits GRX-1 in a time and concentration dependent manner. The activity did not return following dialysis indicating that inhibition is irreversible. Results of substrate protection and mass spectrometry indicate that the inhibition is occurring at the active site. The compound also produced GRX inhibition in human ovarian cancer cells. DISCUSSION: 2-AAPA is an irreversible GRX-1 inhibitor with similar or greater potency compared to previously reported inhibitors. CONCLUSION: The inhibition of GRX-1 by 2-AAPA could be used as a tool to study thiol redox state. FAU - Sadhu, Satya S AU - Sadhu SS AD - Department of Pharmaceutical Sciences, College of Pharmacy, South Dakota State University, Brookings, SD, USA. FAU - Callegari, Eduardo AU - Callegari E FAU - Zhao, Yong AU - Zhao Y FAU - Guan, Xiangming AU - Guan X FAU - Seefeldt, Teresa AU - Seefeldt T LA - eng GR - R15 CA120062/CA/NCI NIH HHS/United States GR - CA120062-01/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20120203 PL - England TA - J Enzyme Inhib Med Chem JT - Journal of enzyme inhibition and medicinal chemistry JID - 101150203 RN - 0 (2-acetylamino-3-(4-(2-acetylamino-2-carboxyethylsulfanylthiocarbonylamino)phenylthiocarbamoylsulfanyl)propionic acid) RN - 0 (Enzyme Inhibitors) RN - 0 (GLRX protein, human) RN - 0 (Glutaredoxins) RN - 0 (Thiocarbamates) RN - GAN16C9B8O (Glutathione) RN - WYQ7N0BPYC (Acetylcysteine) SB - IM MH - Acetylcysteine/*analogs & derivatives/pharmacology MH - Cell Line, Tumor/drug effects MH - Dialysis MH - Dose-Response Relationship, Drug MH - Drug Evaluation, Preclinical MH - Enzyme Inhibitors/*pharmacology MH - Glutaredoxins/*antagonists & inhibitors MH - Glutathione/metabolism MH - Humans MH - Thiocarbamates/chemistry/*pharmacology PMC - PMC4310727 MID - NIHMS657872 COIS- Declaration of Interest Funding for this project was provided by the National Institutes of Health (CA120062-01). EDAT- 2012/02/04 06:00 MHDA- 2013/09/13 06:00 PMCR- 2015/01/29 CRDT- 2012/02/04 06:00 PHST- 2012/02/04 06:00 [entrez] PHST- 2012/02/04 06:00 [pubmed] PHST- 2013/09/13 06:00 [medline] PHST- 2015/01/29 00:00 [pmc-release] AID - 10.3109/14756366.2011.649267 [doi] PST - ppublish SO - J Enzyme Inhib Med Chem. 2013 Jun;28(3):456-62. doi: 10.3109/14756366.2011.649267. Epub 2012 Feb 3.