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Metabolism and disposition of 2-methoxy-4-nitroaniline in male and female Harlan Sprague Dawley rats and B6C3F1/N mice. 2012

James M Mathews, and Qiao Zhan, and Amy S Etheridge, and Purvi R Patel, and Sherry R Black, and Troy T Banks, and Timothy R Fennell, and Rodney W Snyder, and Jason P Burgess, and Stephen D Warren, and Inok Surh, and Suramya Waidyanatha
RTI International, Research Triangle Park, NC, USA.

The disposition of 2-Methoxy-4-nitroaniline (MNA) was investigated in male and female Harlan Sprague Dawley rats and B6C3F(1)/N mice following oral, intravenous, and dermal exposure to [(14)C]MNA at 2, 15, or 150 mg/kg. Clearance of MNA was investigated in male and female rat, mouse, and human hepatocytes. MNA was cleared slowly in hepatocytes from rat (t(1/2) = 152-424 min) and human (t(1/2) = 118-403 min) but faster in mouse (t(1/2)= 70-106 min). MNA was well-absorbed in rats and mice following oral administration and eliminated chiefly in urine (rats, 75-79%; mice, 55-68%) 72 h post dosing. Less than 1% of the radioactivity remained in tissues at 72 h. MNA was poorly absorbed following dermal application in rats (5.5%) and mice (10%) over 24 h. The major pathway of metabolism of MNA was via hydroxylation of the phenyl ring to form 6-hydroxy MNA; major metabolites detected were sulfate and glucuronide conjugates of 6-hydroxy MNA. Following oral administration, the percent of total radioactivity bound in tissues bound was highest in liver (43%) and red blood cells (30%), whereas the radioactivity bound to DNA was highest in cecum (160 pmol/mg DNA).

UI MeSH Term Description Entries
D008297 Male Males
D009574 Nitro Compounds Compounds having the nitro group, -NO2, attached to carbon. When attached to nitrogen they are nitramines and attached to oxygen they are NITRATES. Nitrated Compounds
D009682 Magnetic Resonance Spectroscopy Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING). In Vivo NMR Spectroscopy,MR Spectroscopy,Magnetic Resonance,NMR Spectroscopy,NMR Spectroscopy, In Vivo,Nuclear Magnetic Resonance,Spectroscopy, Magnetic Resonance,Spectroscopy, NMR,Spectroscopy, Nuclear Magnetic Resonance,Magnetic Resonance Spectroscopies,Magnetic Resonance, Nuclear,NMR Spectroscopies,Resonance Spectroscopy, Magnetic,Resonance, Magnetic,Resonance, Nuclear Magnetic,Spectroscopies, NMR,Spectroscopy, MR
D011851 Radioactivity The spontaneous transformation of a nuclide into one or more different nuclides, accompanied by either the emission of particles from the nucleus, nuclear capture or ejection of orbital electrons, or fission. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed) Nuclear Decay,Radioactive Disintegration,Decay, Nuclear,Disintegration, Radioactive,Disintegrations, Radioactive,Radioactive Disintegrations,Radioactivities
D002250 Carbon Radioisotopes Unstable isotopes of carbon that decay or disintegrate emitting radiation. C atoms with atomic weights 10, 11, and 14-16 are radioactive carbon isotopes. Radioisotopes, Carbon
D002851 Chromatography, High Pressure Liquid Liquid chromatographic techniques which feature high inlet pressures, high sensitivity, and high speed. Chromatography, High Performance Liquid,Chromatography, High Speed Liquid,Chromatography, Liquid, High Pressure,HPLC,High Performance Liquid Chromatography,High-Performance Liquid Chromatography,UPLC,Ultra Performance Liquid Chromatography,Chromatography, High-Performance Liquid,High-Performance Liquid Chromatographies,Liquid Chromatography, High-Performance
D004247 DNA A deoxyribonucleotide polymer that is the primary genetic material of all cells. Eukaryotic and prokaryotic organisms normally contain DNA in a double-stranded state, yet several important biological processes transiently involve single-stranded regions. DNA, which consists of a polysugar-phosphate backbone possessing projections of purines (adenine and guanine) and pyrimidines (thymine and cytosine), forms a double helix that is held together by hydrogen bonds between these purines and pyrimidines (adenine to thymine and guanine to cytosine). DNA, Double-Stranded,Deoxyribonucleic Acid,ds-DNA,DNA, Double Stranded,Double-Stranded DNA,ds DNA
D004333 Drug Administration Routes The various ways of administering a drug or other chemical to a site in a patient or animal from where the chemical is absorbed into the blood and delivered to the target tissue. Administration Routes, Drug,Administration Route, Drug,Drug Administration Route,Route, Drug Administration,Routes, Drug Administration
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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