Experimental research of interstitially implanted ~(125)I seed on the transplanted bladder cancer in T_(739) mouse / 医学研究生学报

ABSTRACT

Objective: In T_(739) inbred line mice,bladder cancer model was established via tumor source transplant.In order to get insights of the biological effects of implanting ~(125)I seed to treat bladder cancer,the development and the pathological modality of tumor tissues were observed through the experiment of implanting ~(125) I seed.The experiment was to provide theoretical gist and practical guidance for clinical(utilization) of ~(125)I seed for brachytherapy of bladder cancer. Methods: 16 T_(739) inbred line mice were divided into two groups(Aexperimental group,n=8;Bcontrol group,n=8) in random;bladder cancer model was established via tumor source transplant.When the diameter of the transplanting tumor was about 0.7 cm,~(125)I seeds were implanted at the tumor of experimental group while the empty seed was penetrated into the control group at the same position as the experimental group and the experimental mice were executed after 24 days.The longest vertical diameters(a) and(b) of tumor body were observed every 3 days and the volume of tumor body(V=ab~(2)/2) was calculated.Combining with the weight of mouse(W) and the weight of tumor body after execution of mice(w),the growth curve of tumor was protracted and the colony redouble time and tumor suppression rate were calculated.After fixation of formaldehyde,the pathological modality of tumor tissues were observed with HE staining. Results: ① The transplantation was 100% successful and there was no natural fade-away phenomenon.②After implantation of seed,the weight of group A mice increased by(4.93?0.60)g,and group B increased by(13.60?1.15)g(P