title: Divalent cations and radiation induced lipid peroxidation.
abstract: Response of Co2+, Cu2+, Fe2+, Ni2+ and Mn2+ against radiation induced lipid peroxidation has been examined. Liposomes prepared from L-alpha-lecithin were irradiated with or without divalent cations, Co2+ and Cu2+ inhibited lipid peroxidation in concentration dependent manner. On the other hand Fe2+, Ni2+ and Mn2+ enhanced the peroxidation. The enhancement of peroxidation due to Ni2+ was biphasic in nature. Higher concentration of Mn2+ decreased the peroxidation. Except Cu2+ no other cation studied could change the non-linear pattern of radiation induced lipid peroxidation. The pro- or antioxidant effect of divalent cations may be due to their reactivity towards oxygen and oxygen free radicals, and at least in part to their hard/soft acid character.
authors.affiliation: Radiation Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India.
authors.forename: S L
authors.initials: SL
authors.lastname: Sitasawad
authors.forename: R K
authors.initials: RK
authors.lastname: Kale
mesh_terms: D002413:Cations, Divalent / Q000494:pharmacology*; D015227:Lipid Peroxidation / Q000187:drug effects* / Q000528:radiation effects
chemical_list: D002413:Cations, Divalent