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• W2040808745 abstract "Mn(III) tetrakis(N-ethylpyridinium-2-yl)porphyrin, MnTE-2-PyP5+, a potent catalytic superoxide and peroxynitrite scavenger, has been beneficial in several oxidative stress-related diseases thus far examined. Pharmacokinetic studies are essential for the better assessment of the therapeutic potential of MnTE-2-PyP5+ and similar compounds, as well as for the modulation of their bioavailability and toxicity. Despite high hydrophilicity, this drug entered mitochondria after a single 10 mg/kg intraperitoneal injection at levels high enough (5.1 μM; 2.95 ng/mg protein) to protect against superoxide/peroxynitrite damage. Utilizing the same analytical approach, which involves the reduction of MnTE-2-PyP5+ followed by the exchange of Mn2+ with Zn2+ and HPLC/fluorescence detection of ZnTE-2-PyP4+, we measured levels of MnTE-2-PyP5+ in mouse plasma, liver, kidney, lung, heart, spleen, and brain over a period of 7 days after a single intraperitoneal injection of 10 mg/kg. Two B6C3F1 female mice per time point were used. The pharmacokinetic profile in plasma and organs was complex; thus a noncompartmental approach was utilized to calculate the area under the curve, cmax, tmax, and drug elimination half-time (t1/2). In terms of levels of MnTE-2-PyP5+ found, the organs can be classified into three distinct groups: (1) high levels (kidney, liver, and spleen), (2) moderate levels (lung and heart), and (3) low levels (brain). The maximal levels in plasma, kidney, spleen, lung, and heart are reached within 45 min, whereas in the case of liver a prolonged absorption phase was observed, with the maximal concentration reached at 8 h. Moreover, accumulation of the drug in brain continued beyond the time of the experiment (7 days) and is likely to be driven by the presence of negatively charged phospholipids. For tissues other than brain, a slow elimination phase (single exponential decay, t1/2 = 60 to 135 h) was observed. The calculated pharmacokinetic parameters will be used to design optimal dosing regimens in future preclinical studies utilizing this and similar compounds." @default.
• W2040808745 created "2016-06-24" @default.
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• W2040808745 date "2008-10-01" @default.
• W2040808745 modified "2023-10-17" @default.
• W2040808745 title "Pharmacokinetics of the potent redox-modulating manganese porphyrin, MnTE-2-PyP5+, in plasma and major organs of B6C3F1 mice" @default.
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• W2040808745 doi "https://doi.org/10.1016/j.freeradbiomed.2008.05.015" @default.
• W2040808745 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2583406" @default.
• W2040808745 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18598757" @default.
• W2040808745 hasPublicationYear "2008" @default.
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