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  • A p-menth-1-ene-4,7-diol (EC-1) from Eucalyptus camaldulensis Dhnh. triggers apoptosis and cell cycle changes in Ehrlich ascites carcinoma cells.

A p-menth-1-ene-4,7-diol (EC-1) from Eucalyptus camaldulensis Dhnh. triggers apoptosis and cell cycle changes in Ehrlich ascites carcinoma cells.

Phytotherapy research : PTR (2015-01-15)
Farhadul Islam, Jahan Ara Khanam, Mahbuba Khatun, Natasha Zuberi, Laboni Khatun, Syed Rashel Kabir, Md Abu Reza, M M Ali, M A Rabbi, Vinod Gopalan, Alfred King-Yin Lam
ABSTRACT

Anticancer activities of p-menth-1-ene-4,7-diol (EC-1) isolated from Eucalyptus camaldulensis Dhnh. were studied on Ehrlich ascites carcinoma (EAC) cells by MTT (3-[4,5-dimethylthiazol-2-yl]-2,5 diphenyl tetrazolium bromide) assay. Anticancer activities also analyzed in EAC-bearing mice by assessment of cancer growth inhibition, changes in cancer volume, changes in life span, and hematological parameters. Apoptosis was analyzed by fluorescence microscope, DNA fragmentation assay, and flow cytometry. The expression of apoptosis-related genes, Bcl-2, Bcl-X, PARP-1, p53, and Bax, were analyzed using polymerase chain reaction (PCR). EC-1 significantly inhibited proliferation of EAC cells in vivo and restored the altered hematological parameters of EAC-bearing mice. Cytological observation by fluorescence microscope showed apoptosis of EAC cells upon treatment with EC-1. Also, DNA fragmentation assay revealed EAC cells' apoptosis following EC-1 treatment. Increased mRNA expressions of p53 and Bax genes and negative expressions of Bcl-2 and Bcl-X were observed in cells treated with EC-1. These findings confirmed the induction of apoptosis by EC-1. In addition, MTT assay showed dose-dependent anticancer activity of EC-1 against EAC cell. Cell cycle analysis revealed that EC-1 treatment caused suppression of EAC cells at S phase. To conclude, EC-1 is a novel anticancer compound and showed antiproliferative and apoptotic activities in cellular and mice models.

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