PMID- 23842788 OWN - NLM STAT- MEDLINE DCOM- 20140423 LR - 20211021 IS - 1432-1327 (Electronic) IS - 0949-8257 (Print) IS - 0949-8257 (Linking) VI - 18 IP - 7 DP - 2013 Oct TI - Dual effect of heparin on Fe(2)(+)-induced cardiolipin peroxidation: implications for peroxidation of cytochrome c oxidase bound cardiolipin. PG - 729-37 LID - 10.1007/s00775-013-1019-z [doi] AB - The effect of heparin on peroxidation of cardiolipin (CL) initiated by ferrous iron was studied in vitro using detergent-solubilized CL, liposomal CL, or CL bound to isolated cytochrome c oxidase (CcO). Heparin increased both the rate and the extent of CL peroxidation for detergent-solubilized CL and for CcO-bound CL. The effect of heparin was time- and concentration-dependent as monitored by the formation of conjugated dienes or thiobarbituric acid reactive substances. The results showed great similarity between the effect of heparin and the effect of certain iron chelators, such as ADP, on phospholipid peroxidation. Heparin increased the peroxidation of CcO-bound CL only when tertiary butyl hydroperoxide was also present. The enzyme activity of the resulting CcO complex decreased 25 %, in part due to peroxidation of functionally important CL. In contrast to peroxidation of detergent-solubilized CL, peroxidation of liposomal CL was inhibited by heparin, suggesting that the effect of heparin and ferrous iron depends on their proximity to the acyl chains of CL. FAU - Musatov, Andrej AU - Musatov A AD - Department of Biochemistry, The University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, San Antonio, TX, 78229-3900, USA, musatov@saske.sk. LA - eng GR - R01 GM024795/GM/NIGMS NIH HHS/United States GR - GM024795/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20130711 PL - Germany TA - J Biol Inorg Chem JT - Journal of biological inorganic chemistry : JBIC : a publication of the Society of Biological Inorganic Chemistry JID - 9616326 RN - 0 (Cardiolipins) RN - 0 (Detergents) RN - 0 (Liposomes) RN - 9005-49-6 (Heparin) RN - E1UOL152H7 (Iron) RN - EC 1.9.3.1 (Electron Transport Complex IV) SB - IM MH - Animals MH - Cardiolipins/chemistry/*metabolism MH - Cattle MH - Detergents/chemistry MH - Electron Transport Complex IV/chemistry/*metabolism MH - Heparin/*pharmacology MH - Iron/*pharmacology MH - Lipid Peroxidation/*drug effects MH - Liposomes/metabolism MH - Solubility PMC - PMC3783530 MID - NIHMS504717 EDAT- 2013/07/12 06:00 MHDA- 2014/04/24 06:00 PMCR- 2014/10/01 CRDT- 2013/07/12 06:00 PHST- 2013/01/31 00:00 [received] PHST- 2013/06/22 00:00 [accepted] PHST- 2013/07/12 06:00 [entrez] PHST- 2013/07/12 06:00 [pubmed] PHST- 2014/04/24 06:00 [medline] PHST- 2014/10/01 00:00 [pmc-release] AID - 10.1007/s00775-013-1019-z [doi] PST - ppublish SO - J Biol Inorg Chem. 2013 Oct;18(7):729-37. doi: 10.1007/s00775-013-1019-z. Epub 2013 Jul 11.