en فیزیولوژی ورزشی Sport Physiology تحقيقي Original Paper <div><strong>ABSTRACT</strong><br> <strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Background and objectives:</strong> Esophageal cancer is the eighth most common type of cancer in the world. Considering the adverse effects of anticancer drugs and the emergence of chemotherapy resistance, plant-derived extracts and their constituents could be a valuable source of novel anticancer drugs. In this study, we investigated cytotoxic effects of <em>Juniperus excelsa</em> leaf extract on esophageal cancer cell line KYSE-30 and healthy fibroblast cells (HU02 cells).<br> <strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Methods: </strong>KYSE-30 cells and HU02 cells were cultured in DMEM medium. The cells were treated with different concentrations (1, 10, 100, 500 &mu;g/ml) of the <em>J. excelsa </em>leaf extract for 24 and 48 hours. The cytotoxic effects of the extract were assessed using the MTT assay. Data were analyzed using SPSS (version 19) and GraphPad Prism 5.<br> <strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Results:</strong> According to results of the MTT assay, the <em>Juniperus excelsa&rsquo;s</em> leaf extract exerted significant cytotoxic effects on esophagus cancer cell line (KYSE-30) and healthy fibroblast cells (HU02) in a time- and dose-dependent manner (P<0.05).<br> <strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Conclusion:</strong> The <em>J. excelsa </em>leaf extract has cytotoxic effects against KYSE-30 esophageal cancer cells while causing lesser toxicity on healthy fibroblast cells. Our findings suggest that the potential anticancer effects of this extract should be further exploited in future studies.<br> <strong>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Keywords: </strong>Cytotoxic, MTT, Hu02, Kyse-30, <em>Juniperus excelsa.</em></div> Cytotoxic, MTT, Hu02, Kyse-30, Juniperus excelsa. 13 18 http://mlj.goums.ac.ir/browse.php?a_code=A-10-637-3&slc_lang=en&sid=1 Ameneh Elikaei arezoo_elikaei774@yahoo.com 100319475328460018812 100319475328460018812 Yes Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran Hossein Vazini 100319475328460018813 100319475328460018813 No Department of Nursing, Faculty of Basic Sciences, Hamedan Branch, Islamic Azad University, Hamedan, Iran Fatemeh Javani Jouni 100319475328460018814 100319475328460018814 No Department of Microbiology, Islamic Azad University, Tehran North Branch, Tehran, Iran Jaber Zafari 100319475328460018815 100319475328460018815 No Department of Microbiology, Islamic Azad University, Tehran North Branch, Tehran, Iran