Effect of Sapthaparna (Alstonia scholaris Linn) in modulating the benzo(a)pyrene-induced forestomach carcinogenesis in mice

Ganesh Chandra Jagetia, Manjeshwar Shrinath Baliga, Ponemone Venkatesh

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Abstract

The chemopreventive effect of various doses of hydroalcoholic extract of Alstonia scholaris (ASE) was studied on the benzo(a)pyrene (BaP) induced forestomach carcinoma in female mice. The treatment of mice with different doses, i.e. 1, 2 and 4 mg/ml ASE in drinking water before, during and after the treatment with carcinogen, exhibited chemopreventive activity. The highest activity was observed for 4 mg/ml ASE, where the tumor incidence (93.33%) was reduced by 6.67%. Similarly, the tumor multiplicity reduced (61.29%) significantly (P<0.02) at 4 mg/ml in the pre-post-ASE treated group. However, the pre or post-treatment of mice with 4 mg/ml ASE did not show chemopreventive activity. These findings are corroborated by micronucleus assay, where treatment of mice with ASE before, during and after carcinogen treatment reduced the frequency of micronuclei (MN) in the splenocytes in a dose dependent manner. The MN frequency reached a nadir at 4 mg/ml ASE, the highest drug dose which showed maximum chemopreventive action. The ASE treatment not only reduced the frequency of splenocytes bearing one MN but also cells bearing multiple MN indicating the efficacy of ASE in inhibiting mutagenic changes induced by BaP. The pre or post-treatment of mice with 4 mg/ml ASE also significantly reduced the frequency of BaP-induced MN in the splenocytes of treated animals.

Original languageEnglish
Pages (from-to)183-193
Number of pages11
JournalToxicology Letters
Volume144
Issue number2
DOIs
Publication statusPublished - 30-09-2003
Externally publishedYes

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Alstonia
Bearings (structural)
Benzo(a)pyrene
Carcinogens
Tumors
Carcinogenesis
Drinking Water
Assays
Animals
Micronucleus Tests
Pharmaceutical Preparations
Neoplasms
Carcinoma
Incidence

All Science Journal Classification (ASJC) codes

  • Toxicology

Cite this

Jagetia, Ganesh Chandra ; Baliga, Manjeshwar Shrinath ; Venkatesh, Ponemone. / Effect of Sapthaparna (Alstonia scholaris Linn) in modulating the benzo(a)pyrene-induced forestomach carcinogenesis in mice. In: Toxicology Letters. 2003 ; Vol. 144, No. 2. pp. 183-193.
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abstract = "The chemopreventive effect of various doses of hydroalcoholic extract of Alstonia scholaris (ASE) was studied on the benzo(a)pyrene (BaP) induced forestomach carcinoma in female mice. The treatment of mice with different doses, i.e. 1, 2 and 4 mg/ml ASE in drinking water before, during and after the treatment with carcinogen, exhibited chemopreventive activity. The highest activity was observed for 4 mg/ml ASE, where the tumor incidence (93.33{\%}) was reduced by 6.67{\%}. Similarly, the tumor multiplicity reduced (61.29{\%}) significantly (P<0.02) at 4 mg/ml in the pre-post-ASE treated group. However, the pre or post-treatment of mice with 4 mg/ml ASE did not show chemopreventive activity. These findings are corroborated by micronucleus assay, where treatment of mice with ASE before, during and after carcinogen treatment reduced the frequency of micronuclei (MN) in the splenocytes in a dose dependent manner. The MN frequency reached a nadir at 4 mg/ml ASE, the highest drug dose which showed maximum chemopreventive action. The ASE treatment not only reduced the frequency of splenocytes bearing one MN but also cells bearing multiple MN indicating the efficacy of ASE in inhibiting mutagenic changes induced by BaP. The pre or post-treatment of mice with 4 mg/ml ASE also significantly reduced the frequency of BaP-induced MN in the splenocytes of treated animals.",
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Effect of Sapthaparna (Alstonia scholaris Linn) in modulating the benzo(a)pyrene-induced forestomach carcinogenesis in mice. / Jagetia, Ganesh Chandra; Baliga, Manjeshwar Shrinath; Venkatesh, Ponemone.

In: Toxicology Letters, Vol. 144, No. 2, 30.09.2003, p. 183-193.

Research output: Contribution to journalArticle

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