Cell and Tissue Journal

Abstract Aim: In this article, the ability of p < sup>32 radioactive drugs for treatment and control of breast cancer in rat model and also verifying of distribution of drug in rat organs are investigated.
Material and Methods: 10 to 20 mg per kg of DMBA gavaged to SD strain rats. Tumors 15-10 mm in diameter were selected for testing. P32 radioactive drugs injected to developed tumors with interval 3, 5 and 7 days. The distribution of the P32 radioactive drugs in the body of rat were analyzed by NI detector. After the treatment period, animals were anesthetized and the tumor is completely removed under sterile conditions and placed in 10% formalin. Sections of the tumors were obtained and processed using Tissue Processor. After tissue processing and sectioning, the samples were stained with hematoxylin - eosin were examined.
Results: The results obtained from the examining histological sections prepared from tumor tissue confirmed that, the pathology of tumors induced by DMBA in rats used in this study is very similar to human mammary tumors. Five days after injection, we could find tumor's cells and lymph ducts are covered by residual epithelial cells. Many of the cells are separated from the basement membrane and collapsed into the tubular cavity. Rest of the cells has small nuclei, with chromatin condensation mode and cytoplasm was compact and dense. In radius of about 7-8 mm around the site of injection the tumor's cells were necrosis and formed a cavity, inside of tumor.
Conclusions: These observations showed further penetration and influences of radiation emitted from the phosphor 32 in the tumor tissue based on our injection pattern.
Therefore if given the proper distance of injection within the tumor, destroying the tumor's ability to be on time will be shorter.