University of Kashan Journal of Nanostructures 2251-7871 9 3 2019 07 01 Investigation of The Effect of Radiosensitization of Tungsten Oxide Nanoparticles on AGS Cell Line of Human Stomach Cancer in Megavoltage Photons Radiation 563 578 84392 10.22052/JNS.2019.03.018 EN Amin Hassanvand Department of Medical Physics, Faculty of Medicine,Shahid Sadoghi University of Medical Sciences,Yazd, Iran Mohammad Hossein Zare Department of Medical Physics, Faculty of Medicine,Shahid Sadoghi University of Medical Sciences,Yazd, Iran Ali Shams Department of Immunology, Faculty of Medicine, Shahid Sadoghi University of Medical Sciences, Yazd, Iran Abolfazlal Nickfarjam Department of Medical Physics, Faculty of Medicine,Shahid Sadoghi University of Medical Sciences,Yazd, Iran Masood Shabani Department of Radiation therapy-Oncology, Faculty of Medicine,Shahid Sadoghi University of Medical Sciences,Yazd, Iran Hossein Rahavi Department of Immunology, Faculty of Medicine, Shahid Sadoghi University of Medical Sciences, Yazd, Iran Journal Article 2018 11 20 Radiotherapy which consists of external beam radiotherapy (EBRT) and internal radioisotope therapy (RIT), has a wide usage for treating cancer as clinical trials.This study provides some conditions to prove that tungsten oxide nanoparticles (WO3) is a radiosensitizer.The peripheral blood mononuclear cells (PBMCs) were used to calculate inhibitory concentration (IC).The AGS cell line exposed the concentration of 89.6 µg/mL (IC20) nanoparticle WO3 that was optimal and its radiosensitization was examined in megavoltage photons radiation of 6 MV x-rays. The sensitivity enhancement ratio (SER) and dose enhancement factor (DEF) was determined 1.24 and 1.68 respectively. We described the mechanisms of creating nanoparticles WO3 toxicity and genotoxicity in different concentrations on AGS cell line. The mean size of WO3 NPs by transmission electron microscopy wasmeasured 31.89 3.82 nm.Tungsten oxide Nanoparticles cause to reduce cell viability, remove membrane and damage to DNA. There was a meaningful increasing in damages to DNA and proliferation cell potency and also significantly reducing cell viability in concentrations more than 100 µg/mL. https://jns.kashanu.ac.ir/article_84392_dc6de7a5469cc5dcbe9d96a4f1ead9f9.pdf