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Title: Caffeine, quercetin and alizarin stimulate the exhalation of metabolic products of [14C]-N-nitrosodiethylamine in mice
Authors: Khanduja, K L
Sangari, R K
Bhardwaj, A
Issue Date: Jun-2002
Publisher: NISCAIR-CSIR, India
Abstract: Naturally occurring plant products belonging to different chemical classes namely alizarin, an anthraquinone, caffeine, a methyl xanthine derivative and quercetin, a flavonol were studied for their effect on elimination of metabolites of [14C]-N- nitrosodiethylamine 14C -NDEA) through respiration in mice. Treatment with caffeine, quercetin and alizarin at doses of 200, 9 and 9 μg/ml respectively, in drinking water enhanced the exhalation of 14CO2, one of the major end products of NDEA metabolism. Radioactive CO2 exhaled in 60 min increased by 2, 1.61 and 1.4-folds in animals treated with caffeine, quercetin and alizarin for 8 weeks respectively. This increase in exhalation in caffeine-treated animals was achieved even in 2 weeks. These compounds had no adverse effects on the absorption of radioactive NDEA from the gut of the animals as shape and time of 14CO2 peak was similar in ip and orally administered [14C –NDEA]. Increased detoxification/elimination of the carcinogen could be one of the mechanisms for the anticarcinogenic properties of these phytochemicals in lung tumorigenesis induced by orally administered NDEA.
Page(s): 739-744
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.40(06) [June 2002]

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