Elimination of Deleterious Effects of DMBA-Induced Skin Carcinogenesis in Mice by Syzygium cumini Seed Extract

Abstract

The inhibition of tumor incidence by hydro-alcoholic extract of S.cumini seed was evaluated in mice on two stage process of skin carcinogenesis induced by single application of 7, 12-dimethyl benz(a)anthracene (100 µg/100µl of acetone), and 2 weeks later promoted by repeated application of croton oil (1% acetone/thrice in a week) till the end of the experiment (i.e. 16 weeks). Oral administration of extract at a dose of 250mg/kg b.wt./day at the peri-initiational stage (i.e. 7 days before and 7 days after DMBA application), promotional stage (i.e. from the time of croton oil application) and at both the stages (i.e. 7 days prior to DMBA application & continued till the end of experiment) to the mice, recorded a significant reduction in tumor incidence to 37.5, 50 & 25% respectively in comparison to the carcinogen treated control, where tumor incidence was found as 100%. Tumor yield and Tumor burden were also significantly reduced by SCE. Similarly, the cumulative number of papillomas after 16 weeks was 68 in the control group, which was reduced to 15, 21 & 8 in the animals treated with the SCE continuously at peri-, post- and peri- & post- initiation stage respectively. A significant impairment was noticed in the levels of reduced glutathione, superoxide dismutase, catalase & protein and enhancement in LPO in liver and skin of carcinogen treated control mice as compared with vehicle treated mice. All such parameters were returned to near normal value by administration of SCE to DMBA treated mice. These results suggest a possible chemopreventive property of S.cumini against DMBA induced skin carcinogenesis in mice.

Phytochemistry, traditional uses and pharmacology of Eugenia jambolana Lam. (black plum): A review

“…The hydroethanolic extract of the seed prevented the DMBA-induced croton oil promoted skin (Parmar, Sharma, Verma and Goyal, 2010;Parmar, Sharma, Verma, Sharma, et al, 2010b) and benzo a pyrene-induced gastric carcinogenesis in mice (Goyal et al, 2010).…”

“…Recently, Parmar, Sharma, Verma and Goyal (2010); Parmar, Sharma, Verma, Sharma, et al (2010b) have reported that jamun possess cancer chemopreventive properties in the DMBA-induced croton oil promoted two stage skin carcinogenesis in Swiss albino mice. Feeding 125 and 250 mg/kg/b.…”

“…It aims at blocking, reversing, or delaying carcinogenesis before the development of invasive disease by targeting key molecular derangements using pharmacological or nutritional agents. Chemopreventive interventions may be applied at any time during carcinogenesis, from the initial molecular defect through the accumulated molecular, cellular and histopathological alterations that characterize disease progression before an invasive and potentially metastatic stage (Parmar, Sharma, Verma and Goyal, 2010;Parmar, Sharma, Verma, Sharma and Goyal, 2010b).…”

Anticancer Herbs in Ayurveda: A Review

“…The results suggest a possible chemopreventive property of S.cumini against DMBA induced skin carcinogenesis in mice 16 .…”

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“…There are various medicinal plants which have significant medicinal values and are widely used in folklore medicine. The literature reveals that flavonoids, alkaloids, terpenes of plant derived products have received considerable attention in recent years due to their diverse pharmacological properties including cytotoxicity and cancer chemopreventive effects 3 .…”