Abstract Title:

Inhibition of DMBA-induced mammary cancer by the monoterpene d-limonene.

Abstract Source:

Carcinogenesis. 1984 May ;5(5):661-4. PMID: 6426810

Abstract Author(s):

J A Elegbede, C E Elson, A Qureshi, M A Tanner, M N Gould

Article Affiliation:

J A Elegbede


We investigated whether the addition of d-limonene to the diets of rats would modify the process of mammary tumor induction by 7,12-dimethylbenz[a]anthracene (DMBA). When diets containing 1000 or 10 000 p.p.m. d-limonene were fed to rats from one week before DMBA administration to the end of the experiment (27 weeks post DMBA treatment), a significant reduction in mammary carcinogenesis was observed at each level. The inhibition of carcinogenesis was mainly due to an increase in latency; however, major differences in incidence could be seen during the follow-up period. For example, rats fed 10 000 p.p.m. of d-limonene had a 72% reduction in mammary tumors when compared to controls at 18 weeks post DMBA treatment. In addition to inhibiting the appearance of mammary tumors, d-limonene was also found to cause the regression of frank mammary tumors. No toxicity was evident in these rats even at the highest d-limonene dose. Control and all treated rats gained weight at the same rate throughout the experiment. In addition, no differences were found in their peripheral blood counts (Hct, total white cell and differential count).

Study Type : Animal Study

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