Supplementary 1. Results of reviewed studies. Although, these studies have used different NPs, all results show success of NPs radiosensitization at radiotherapy. Nanoparticle type Study result Study name, citation Gold nanoparticles One year survival in mice was 86% .Irradiation after intravenous injection of 2.7 g Au/kg of gold nanoparticles versus 20% after just irradiation alone. Significant tumor growth delay and long-term tumor control were observed when 1.9 g of Au kg–1 was combined with 42 Gy radiation compared with radiation alone, but not 30 Gy. Similarly with 157 keV photons, more effect was observed with GNPs combined with 50.6Gy than with 44Gy. Hydroxyapatite nanoparticles can enhance the radiosensitivity of tumor cells in vitro and in vivo through the inhibition of DNA repair. Nanosilver and nanogold enhanced the radiationsensitivity of hepatocellular carcinoma cells. Hainfeld et al, Phys Med Biol. 2004 Gold nanoparticles Hydroxyapatit e nanoparticles Nanosilver and nanogold particles Nano-C60 Multi-walled carbon nanotubes TiO2 Nanoparticle Gold nanoparticles Titanate nanotubes Thio-glucosebound gold nanoparticles Glucosecapped gold nanoparticles Oxidized silicon nanoparticles Gold nanoparticles Hainfeld et al, Phys Med Biol 2010 Chu et al, Neuro Oncol. 2013 Zhenga et al, Biomed Pharmacother. 2013 Ni et al, J Nanopart Res. 2008 Nano-C60 inhibits the growth of tumor cells at certain concentrations and increases the effects of 60Co γirradiation. Multi-walled carbon nanotubes induced cell death Yang et al , markedly with about 8.7 times higher than radiotherapy Gene Ther Mol alone under little dose of radiation. Biol.2008 Titanium dioxide nanoparticles increased radiosenstivity Rezaei-Tavirani et al, of breast cancer cells to gamma irradiation. Iran J Cancer Prev. 2013 They showed radiosensitization in MDA-MB-231 cells Jain et al, at MV and KV X-ray energies. Int J Radiat Oncol Biol Phys. 2011 Cell lines incubated with TiONts were radiosensitized Mirjolet et al, and TiONts decreased DNA repair efficiency after Radiother Oncol. 2013 irradiation. The combination of Glu-GNPs with radiation resulted in Wang et al, a significant growth inhibition, compared with radiation J Nanopart Res.2013 alone. Glu-GNPs trigger activation of the CDK kinases leading Roa et al, to cell cycle acceleration in the G0/G1 phase and Nanotechnology. 2009 accumulation in the G2/M phase. Silicon nanoparticles did not increase the production of Klein S reactive oxygen species (ROS)in-ray treated cells, but the NH2- silicon nanoparticles significantly enhanced the ROS formation. They demonstrated that gold nanoparticles in Chang et al, conjunction with ionizing radiation significantly Cancer Sci. 2008 retarded tumor growth and prolonged survival compared to the radiation alone controls (P < 0.05). Kaura et al, Glucose capped The study revealed a significant reduction in radiation dose for killing the HeLa cells with internalized Glu- Nuclear Instruments and gold Methods in Physics nanoparticles GNPs as compared to the HeLa cells without Glu-GNP. Research Section B: Beam Interactions with Materials and Atoms.2013 Radiosensitization of breast cancer to X-radiation with Chattopadhyay et al, Gold Breast Cancer Res nanoparticles GNPs was successfully achieved with an optimized therapeutic strategy of molecular targeting of HER-2 Treat. 2013 and intratumoral administration. Zhang et al, Thio-glucose- A threefold increase in GNP uptake was observed in glucose-capped GNPs, with a reduction in cellular Clin Invest Med. 2008 capped gold nanoparticles proliferation. They showed the influence of GNP intracellular Lechtman et al, Gold Phys Med Biol. 2013 nanoparticles localization on radiosensitization. Maggiorella et al, Hafnium oxide Hafnium oxide nanoparticles were shown to Future Oncol.2012 nanoparticles demonstrate an approximately nine time radiation dose enhancement compared with water. Germanium nanoparticles Germanium nanoparticles particles were able to enhance the radiosensitivity of cells. Lin et al, Int J Radiat Biol. 2009 PEGylatedgold nanoparticles Gold nanoparticles may be usefully integrated into the RT treatment of brain tumors, with potential benefits resulting from increased tumor cell radiosensitization to preferential targeting of tumor-associated vasculature. Joh et al, PLoSONE .2013 PEGylatedgold nanoparticles The cell survival rates decreased as a function of the dose for all sources and nanoparticle concentrations. Liu et al, Phys Med Biol. 2010 Cysteamine and thioglucose gold nanoparticles Gold nanoparticles Thio-glucose bound gold nanoparticles Gold nanoparticles cancerous cells. significantly enhance killing Kong et al, Small. 2008 GNPs can be used to enhance the effect of radiation doses from kilovoltage x-ray radiation therapy and megavoltage electron radiation therapy beams. Rahman et al, Nanomedicine. 2009 They demonstrated that Glu-GNPs have remarkable potential to enhance radiotherapy on ovarian cancer cells. Geng et al, Nanotechnology.2011 Supplementary 2. Result of reviewed studies carried out using GNPs as radio sensitizing agents in radiotherapy of cancer. These studies have used different GNPs sizes; also types of cell line, radiation types and doses vary. But all of them have shown GNPs and have improved radiotherapy treatments. Gold Nanoparticle size Approximately 12 nm 1.9 nm Cell line type human U251 glioblastoma cells (ATCC), human prostate cancer cells (DU145) breast cancer cells(MDA-MB-231) lung epithelial cells (L132) Type of radiation and dose in vitro 4 Gy (150 kVp), in vivo 20 Gy (175 kVp) to the brain X-ray (6 MV, 15 MV) and electron (6 MeV, 16 MeV) Varian 2100CD linear accelerator 3.55 Gy/min and 3.85 Gy/min, for 6 MV and 15 MV(respectively) 4.0 Gy/min for both 6 MeV and 16 MeV X-rays(6 MV) linear accelerator 10Gy 13 nm lung-cancer cells ( A549) 15 nm human prostate carcinoma cell ( DU145) cesium-137 2 Gy (single dose) melanoma cells (B16F10) Electron (6 MeV) Varian 2100C linear accelerator 25 Gy Approximately 13 nm Ranging from 5-9 HeLa cell line (human cervix cancer cells) nm 30 nm 30 nm 30 nm 10.8 nm 1.9 nm MDA-MB-361 human prostate adenocarcinoma (PC3) Human prostate carcinoma cells (DU-145) breast-cancer cells (MCF-7) nonmalignant breastcells (MCF-10A) bovine aortic endothelial cells γ-radiation and carbon ion irradiation 62 MeV 12C6 LET of 290 keV/μm. 0.9, 1.9, 2.8 and 3.7 Gy X-rays(100 kVp) In vivo : 0.5 Gy In vitro : 11 Gy X-ray (300 kVp) 0, 1, 2, 4, and 8 Gy X-rays(200-kVp) 2 Gy X-ray(200-kVp), γ -rays caesium-137 or cobalt-60 radiation 2 Gy X-ray (80 kV and 150 kV ) 0, 1, 2, 3, 4, and 5 Gy Electron (6 MeV and 12 MeV) linear accelerator (Clinac 2100C Varian ) Study name, citation Joh et al, PLoSONE .2013 Jain et al, Int J Radiat Oncol Biol Phys. 2011 Wang et al, J Nanopart Res.2013 Roa et al, Nanotechnology. 2009 Chang et al, Cancer Sci. 2008 Kaura et al, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms.2013 Chattopadhyay et al, Breast Cancer Res Treat. 2013 Lechtman et al, Phys Med Biol. 2013 Zhang et al, Clin Invest Med. 2008 Kong et al, Small. 2008 Rahman et al, Nanomedicine. 2009 1 Gy/min 10 Gy X-ray(8.048 keV) commercial biological irradiator (E(average) = 73 keV), a Cu-Kalpha(1) , Electon (6.5 keV), a monochromatized synchrotron source (6 MeV) a radio-oncology linear accelerator (3 MeV) a proton source 6.1 nm EMT-6 cell CT26 cell 1.9 nm mammary carcinomas (EMT-6) X-ray (250 kVp) 26–30 Gy 1.9 nm aggressive mouse head and neck squamous cell carcinoma (SCCVII) 15nm human ovarian cancer cells(SK-OV-3) X-ray (68 keVp) 42,30 Gy Electon( 157 keV,) 44.50.6 Gy X-ray(90 kVp ) 10 Gy Varian 23EX linear accelerator(6 MV) 10 Gy Liu et al, Phys Med Biol. 2010 Hainfeld et al, Phys Med Biol. 2004 Hainfeld et al, Phys Med Biol 2010 Geng et al, Nanotechnology.201 1