Cancer and Oncology Research Vol. 4(3), pp. 42 - 51
DOI: 10.13189/cor.2016.040302
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Evaluation of Gold, Silver and Silver–Gold (Bimetallic) Nanoparticles as Radiosensitizers for Radiation Therapy in Cancer Treatment


B. Shameer Ahmed 1, Anil G. Rao 2, B M Sankarshan 3, C.S. Vicas 1, K. Namratha 1, T.K. Umesh 3, R. Somashekar 1,*, K. Byrappa 1
1 Centre for Materials Science and Technology, Vijnana Bhavan, University of Mysore, Mysuru,– 570006, Karnataka, India
2 Department of Radiology and Radiological Science, Medical University of South Carolina, 96 Jonathan Lucas St, MSC 323, Charleston, SC 29425-3230, USA
3 Department of Studies in Physics, University of Mysore, Manasagangotri, Mysuru– 570006, Karnataka, India

ABSTRACT

One of the most recognized and widely used treatment modality in cancer is radiation therapy which depends on the radiosensitivity of tumour tissue. Over the past few years there has been lot of interest in the use of formulations to enhance radiotherapeutic effects, especially using metallic (mainly gold) based nanoparticles. Our goal here is to fabricate nanoparticles (NPs) that can be delivered to tumor tissue to increase its radiosensitivity. This would increase efficiency of radiation absorption by the tumor tissue and reduce radiation doses delivered during radiotherapy. This could potentially decrease radiation exposure related side effects to patients. We have achieved this by synthesizing nanoparticles of high Z elements such as gold, silver and a more efficient bimetallic silver-gold size ranging from 3nm to 72nm using chemical reduction and hydrothermal method. The synthesized metallic nanoparticles were characterised using Ultraviolet (UV)-Visible Spectroscopy, Fluorescence spectroscopy and Dynamic Light Scattering. The metallic nanoparticles showed radiosensitizing activity in colloidal form by absorbing radiations when irradiated by 60Co source which emits two gamma rays of energy 1173keV and 1332keV Based on our results, we are of the opinion that such radio-sensitizing agent if injected into the tumour tissue would increase radiation absorption and enhance treatment effect with lower therapeutic radiation dosage.

KEYWORDS
Radiosensitizers, Silver-Gold (Bimetallic) Nanoparticles, Gamma Radiation, Gold Nanoparticles, High-Z Metal Nanoparticles, Enhanced Radiation Therapy

Cite This Paper in IEEE or APA Citation Styles
(a). IEEE Format:
[1] B. Shameer Ahmed , Anil G. Rao , B M Sankarshan , C.S. Vicas , K. Namratha , T.K. Umesh , R. Somashekar , K. Byrappa , "Evaluation of Gold, Silver and Silver–Gold (Bimetallic) Nanoparticles as Radiosensitizers for Radiation Therapy in Cancer Treatment," Cancer and Oncology Research, Vol. 4, No. 3, pp. 42 - 51, 2016. DOI: 10.13189/cor.2016.040302.

(b). APA Format:
B. Shameer Ahmed , Anil G. Rao , B M Sankarshan , C.S. Vicas , K. Namratha , T.K. Umesh , R. Somashekar , K. Byrappa (2016). Evaluation of Gold, Silver and Silver–Gold (Bimetallic) Nanoparticles as Radiosensitizers for Radiation Therapy in Cancer Treatment. Cancer and Oncology Research, 4(3), 42 - 51. DOI: 10.13189/cor.2016.040302.