Nitrosomethyl-n-butylamine and its derivatives, labeled with deuterium in the methyl group or at the alpha position of the butyl group, were given to rats in drinking water at equimolar doses for approximately 20 weeks. Two concentrations were used, 16 mg/l
Japanese journal of cancer research : Gann, 76(3), 184-191 (1985-03-01)
In order to compare the extents of metabolic alpha-hydroxylation of the two alkyl groups in unsymmetrical N-nitrosodialkylamines, N-nitroso-N-alkylbutylamines (alkyl = methyl, ethyl, propyl, butyl, and amyl) were incubated with liver microsomes prepared from phenobarbital- or polychlorinated biphenyl (PCB)-treated and untreated
Aliphatic methylalkylnitrosamines with a chain length of three to six carbon atoms are powerful oesophageal carcinogens in rats and have been shown to methylate target organ DNA preferentially. This class of carcinogens is efficiently metabolized not only in the oesophageal
The effect of phenobarbital (PB) and 3-methylcholanthrene (MC) pretreatment on dealkylations of N-nitrosodimethylamine (NDMA), N-nitrosomethylbutylamine (NMBuA) and N-nitrosomethylbenzylamine (NMBeA) was investigated in rat hepatic microsomes. PB increased the demethylation and the debutylation of NMBuA and the debenzylation of NMBeA. MC
We studied the metabolism of methyl-n-butyl-nitrosamine (MBN), a carcinogen for the rat esophagus and liver. The 2-, 3- and 4-hydroxy derivatives were identified as new metabolites of MBN. In studies on tissue slices freshly removed from MRC-Wistar rats, MBN metabolism
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