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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Effects of (+)-1,2-bis(3,5-dioxopiperazin-1-yl)propane (ADR-529) on iron-catalyzed lipid peroxidation.

ADR-529 [(+)-1,2-bis(3,5-dioxopiperazin-1-yl)propane], a nonpolar, cyclic analogue of EDTA, protects against anthracycline cardiotoxicity in vivo. The protective mechanism presumably involves chelation of iron by a hydrolysis product of ADR-529, thus preventing the formation of reactive iron/oxygen species which can damage membrane lipids. We investigated the effects of ADR-529 and its hydrolysis products (the tetraacid and the diacid diamide) on NADPH- and ADP-Fe(3+)-dependent lipid peroxidation of rat liver microsomes and liposomes in the presence of cytochrome P-450 reductase. Hydrolyzed ADR-529 products caused inhibition of lipid peroxidation when in excess of the iron concentration. However, no inhibition of lipid peroxidation was detected by similar concentrations of nonhydrolyzed ADR-529. Microsomes did not affect the inhibition of lipid peroxidation, suggesting that rat liver microsomes do not hydrolyze ADR-529. Similarly, the diacid diamide hydrolysis product of ADR-529 inhibited ferritin- and adriamycin-iron-dependent liposomal lipid peroxidation in a concentration-dependent manner. No correlation between partially reduced oxygen species (O2.- and .OH; as measured by electron spin resonance) and lipid peroxidation (as assayed by malondialdehyde formation) was observed, suggesting that liposomal lipid peroxidation was strictly an iron-dependent phenomenon. These results suggest that inhibition of lipid peroxidation by iron chelation may be related to the protective effects of ADR-529 on in vivo anthracycline toxicity.[1]

References

  1. Effects of (+)-1,2-bis(3,5-dioxopiperazin-1-yl)propane (ADR-529) on iron-catalyzed lipid peroxidation. Ryan, T.P., Samokyszyn, V.M., Dellis, S., Aust, S.D. Chem. Res. Toxicol. (1990) [Pubmed]
 
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