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Evidence-Based Complementary and Alternative Medicine
Volume 2012, Article ID 176385, 7 pages
Research Article

Effect of Methanolic Leaf Extract of Ocimum basilicum L. on Benzene-Induced Hematotoxicity in Mice

1Cytogenetics & Plant Biotechnology Research Unit, Department of Botany, University of Kalyani, Nadia, Kalyani 741235, India
2Cytogenetics & Molecular Biology Laboratory, Department of Zoology, University of Kalyani, Nadia, Kalyani 741235, India

Received 18 May 2012; Revised 13 July 2012; Accepted 26 July 2012

Academic Editor: Senthamil R. Selvan

Copyright © 2012 S. Saha et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The aim of the present study was to investigate the protective role of methanolic leaf extract of Ocimum basilicum L. against benzene-induced hematotoxicity in Swiss albino mice. GC analysis and subacute toxicity level of the extract were tested. Mice were randomly divided into three groups among which II and III were exposed to benzene vapour at a dose 300 ppm × 6 hr/day × 5 days/week for 2 weeks and group I was control. Group III of this experiment was treated with the leaf methanolic extract at a dose of 100 mg/kg body weight, a dose in nontoxic range. Hematological parameters (Hb%, RBC and WBC counts), cell cycle regulatory proteins expression and DNA fragmentation analysis of bone marrow cells was performed. There was an upregulation of p53 and p21 and downregulation of levels of CDK2, CDK4, CDK6, and cyclins D1 and E in leaf extract-treated group. DNA was less fragmented in group III compared to group II ( 𝑃 < 0 . 0 5 ). The present study indicates that the secondary metabolites of O. basilicum L. methanolic leaf extract, comprising essential oil monoterpene geraniol and its oxidized form citral as major constituents, have modulatory effect in cell cycle deregulation and hematological abnormalities induced by benzene in mice.