Nakisa Rezakhani - Department of Biology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Bahram Goliaei - Department of Biophysics, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran
Fereshte Mahdizade - Department of Biology, Islamshahr Branch, Islamic Azad University, Tehran, Iran
Alireza Nikoofar - Department of Radiotherapy, Iran University of Medical Sciences (IUMS), Tehran, Iran
Hoda Keshmiri Neghab - Department of Photo Healing and Regeneration, Medical Laser Research Center, Yara Institute, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
-Mohammad Hasan Soheilifar - Department of Medical Laser, Medical Laser Research Center, Yara Institute, ACECR, Tehran, IRAN
Seyedeh Sara Azadeh - Department of Photo Healing and Regeneration, Medical Laser Research Center, Yara Institute, Academic Center for Education, Culture and Research (ACECR), Tehran, Iran
Bahareh Bigdeli - Department of Biophysics, Institute of Biochemistry and Biophysics, University of Tehran, Tehran, Iran.

Introduction: Breast cancer is one of the most prevalent diseases around the world. Breast cancer patients treated with radiation may face Side effects as well as cancer recurrence. Some polyphenols exhibit antioxidant effects. Citrus and Orthosiphon Stamineus have source of methylated flavone called Sinensetin (SIN). In this research, we designation of Sinensetin as increasing radiation sensitivity.Material and Methods: The cytotoxic effect of Sinensetin was examined in MDA-MB-۲۳۱ and T۴۷D by MTT assay. As well as, the clonogenic ability of cells were Assessmented in the presence of Sinensetin and combination with radiation. To quantify expression alterations of apoptosis related genes, utilized Real-Time PCR method.Results: In a dose and time-dependent manner, Sinensetin decreased the viability of MDA-MB-۲۳۱ and T۴۷D. The survival fraction was decreased in cells treated with Sinensetin (SIN) prior to X-irradiation compared to cells treated with X-ray only. More ever, expression level of, Bcl-۲, STAT۳, and increased P۵۳ via treated cells with Sinensetin (SIN) and X-ray.Conclusion: Due to the results, Sinensetin (SIN) can be mentioned as a novel radiosensitizer and its effects may considered increasing apoptosis following DNA damage induced by irradiation.

Breast Cancer X, Radiation Sinensetin Radio Sensitizer Agent Flavonoids