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• W2042168051 abstract "Manganese(III) N,N′-ethylenebis(salicylideneiminato) chloride (Mn-salen chloride) and manganese(III) N,N′-ethylenebis(3-methoxysalicylideneiminato) chloride (Mn-(3,3′-MeO)salen chloride) are in vitro superoxide dismutase and catalase mimetics. They protect against free radical-related disease in animals, but Mn-salen can also be a potent prooxidant, damaging free DNA. Mn-salen protects human fibroblast DNA against hydrogen peroxide damage, however, damage to free DNA was confirmed by the comet assay. The DNA-damaging activity was dramatically reduced by co-administration with glutathione with the combination being less damaging to free DNA than either molecule alone. α-Lipoic acid, an antioxidant disulfide commonly used as a dietary supplement, also prevented Mn-salen prooxidant activity. Mn-(3,3′-MeO)salen protected fibroblasts against hydrogen peroxide as efficiently as Mn-salen and showed little damaging activity against free DNA. Protection was invested by both complexes in the presence and in the absence of EDTA, a potential competing chelator. Stabilities of the complexes with respect to decomposition and inactivation were studied by spectroscopic and electrochemical techniques. The complexes’ binding to, and cleavage of, DNA was measured using a quartz crystal resonant sensor. Mn-salen was shown to bind strongly to DNA, prior to cleaving it; Mn-(3,3′-MeO)salen bound weakly and left DNA intact. Co-administration of either glutathione or α-lipoic acid appears to inhibit binding by Mn-salen thus preventing DNA-cleavage." @default.
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• W2042168051 date "2007-02-01" @default.
• W2042168051 modified "2023-10-02" @default.
• W2042168051 title "α-Lipoic acid and glutathione protect against the prooxidant activity of SOD/catalase mimetic manganese salen derivatives" @default.
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• W2042168051 doi "https://doi.org/10.1016/j.jinorgbio.2006.09.023" @default.
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