Experimental Research on a Novel Iodine-125 Seed Strand Connected Using Magnesium Alloy AZ31

Title:Experimental Research on a Novel Iodine-125 Seed Strand Connected Using Magnesium Alloy AZ31

Volume: 9 Issue: 2

Author(s): Chuanxing Li, Yanling Zhang, Dong Chen, Guangfeng Duan, Zhenyin Liu, Liang Zhang, Guang Yang, Tao Zhang, Ming-jian Lu, Sristi Singh, Weidong Zhang and Fujun Zhang

Affiliation:

Keywords: Biodegradation, brachytherapy, magnesium alloy AZ31, Monte Carlo simulations, radioactive iodine-125, VX2 tumors.

Abstract: Background and Purpose: Aim of this research is to study the in vivo degradation and biocompatibility in rabbits and the dose distribution of novel iodine-125 seed strands connected using magnesium alloy AZ31. Method: Thirtythree New Zealand rabbits were divided into three Groups (A, B, and C). All rabbits in Groups A and C were implanted with VX₂ tumors. For Group A, radioactive iodine-125 seed strands were implanted into the VX₂ tumors. For Group B, non-radioactive iodine-125 seed strands were implanted into thigh muscle. Rabbits in Group C were used as controls. Displacement of the seed strands was assessed using X-ray and CT. Blood and urine samples were collected from all groups to measure changes in magnesium ion concentrations. The changing effect of alloy AZ31 tube according to dose distribution of iodine-125 was evaluated using the Monte Carlo method. Results: In Groups A and B, 14 days after implantation, majority of the magnesium alloy tubes were fragmented, and 28 days after implantation, the magnesium alloy tubes were completely degraded. Small differences in dose distribution were observed between bare iodine-125 seeds and iodine-125 seed strands. Conclusions: Our results suggest that these novel iodine-125 seed strands connected using magnesium alloy AZ31 are promising anti-cancer drug for brachytherapy due to the rapid degradation of connective materials and even distribution of seed doses in tumors. Some recent patents are also outlined in this article.

Cite this article as:

Li Chuanxing, Zhang Yanling, Chen Dong, Duan Guangfeng, Liu Zhenyin, Zhang Liang, Yang Guang, Zhang Tao, Lu Ming-jian, Singh Sristi, Zhang Weidong and Zhang Fujun, Experimental Research on a Novel Iodine-125 Seed Strand Connected Using Magnesium Alloy AZ31, Recent Patents on Anti-Cancer Drug Discovery 2014; 9 (2) . https://dx.doi.org/10.2174/1574892809666140130215156