Negishi C, Wakabayashi K, Tsuda M, Sato S, Sugimura T, Saitô H, Maeda M, Jägerstad M. Formation of 2-amino-3,7,8-trimethylimidazo [4,5-f]quinoxaline, a new mutagen, by heating a mixture of creatinine, glucose and glycine.
Mutat Res 1984;
140:55-9. [PMID:
6379441 DOI:
10.1016/0165-7992(84)90042-3]
[Citation(s) in RCA: 59] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
When a mixture of creatinine, glycine and glucose was heated for 2 h at 128 degrees C in diethylene glycol containing 14% water, two mutagens were formed. One of them, responsible for 90% of the mutagenicity, has already been identified as 2-amino-3,8-dimethylimidazo[4,5-f]quinoxaline (MeIQx). The other mutagen was purified and characterized. The UV absorption, mass and NMR spectra suggested that this mutagen was 2-amino-3,7,8-trimethylimidazo[4,5-f]quinoxaline (7,8-DiMeIQx). Comparison of the spectral properties of the compound obtained from the heated model mixture with those of synthetic material confirmed this structure. 7,8-DiMeIQx is a newly identified compound which, at a dose of 1 microgram, induced 163 000 and 9900 revertants of Salmonella typhimurium TA98 and TA100, respectively, with S9 mix.
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