title: Non-carcinogenicity of capsaicinoids in B6C3F1 mice.
abstract: The carcinogenicity of a mixture of capsaicinoids (64.5% capsaicin and 32.6% dihydrocapsaicin) was examined in B6C3F1 mice. In a 13-week toxicity study, renal toxicity was observed in 1% capsaicinoid-treated males. Next, groups of 50 mice of each sex were given 0, 0.025, 0.083 or 0.25% capsaicinoids in powdered diet for 79 weeks and killed in week 83. Food intake was reduced in mice of all capsaicinoid-treated groups, especially females, because of the pungency of capsaicinoids, and inhibition of body weight gain was apparent in females. The numbers of tumour-bearing females in the high-dose groups were significantly lower than that in the controls, and the incidences of hepatocellular neoplasms in both sexes were negatively correlated with the dose of capsaicinoids (Cochran-Armitage trend test). Renal cell adenomas developed in one mouse each of 0.025 and 0.25% capsaicinoid-treated males. The incidences of other tumours were similar in the treated and control groups. Thus, the present study indicated that a mixture of capsaicinoids is not carcinogenic in B6C3F1 mice.
authors.affiliation: Second Department of Pathology, The University of Tokushima School of Medicine, Japan.
authors.forename: A
authors.initials: A
authors.lastname: Akagi
authors.forename: N
authors.initials: N
authors.lastname: Sano
authors.forename: H
authors.initials: H
authors.lastname: Uehara
authors.forename: T
authors.initials: T
authors.lastname: Minami
authors.forename: H
authors.initials: H
authors.lastname: Otsuka
authors.forename: K
authors.initials: K
authors.lastname: Izumi
mesh_terms: D000818:Animals; D001835:Body Weight / Q000187:drug effects; D002211:Capsaicin / Q000031:analogs & derivatives* / Q000633:toxicity; D015197:Carcinogenicity Tests; D002273:Carcinogens / Q000633:toxicity*; D004435:Eating / Q000187:drug effects; D005260:Female; D007668:Kidney / Q000187:drug effects / Q000473:pathology; D008297:Male; D051379:Mice; D008815:Mice, Inbred Strains; D009929:Organ Size / Q000187:drug effects; D012737:Sex Factors
chemical_list: D002273:Carcinogens; D002211:Capsaicin; C012906:dihydrocapsaicin