Tehran University of Medical Sciences Basic & Clinical Cancer Research 2228-6527 10 4 2018 09 16 16 25 EN Sara Tutunchi Department of Medical Genetics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Mojtaba Saffari Department of Medical Genetics, School of Medicine, Tehran University of Medical Sciences, Tehran. I.R Iran. Mahta Mazaheri Department of Medical Genetics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Parisa Nourmohammadi Department of Medical Genetics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran Fereidoon Memari Iran National Tumor Bank, Cancer Research Center, Cancer Institute of Iran, Tehran University of Medical Sciences, Tehran, Iran. Reza Shirkoohi Cancer Biology Research Center, Cancer Institute of Iran, Tehran University of Medical Science, Tehran, Iran. Nasrin Ghasemi Recurrent Abortion Research Centre, Reproductive Sciences Institute, Shahid Sadoughi University of Medical Sciences, Yazd, Iran. 2018 06 17 2018 09 16 Background: Breast cancer is the most common type of cancer among women, and is among the five most prevalent cancer types among Iranian women. Advanced-stage breast cancer is often correlated with distant metastases. Alterations in gene expression affect general cytoskeleton changes during differentiation and oncogenesis, and can be considered an important factor in tumor progression. Gelsolin plays a significant role in actin assembly and has been introduced as a tumor activator. The aim of this study was to evaluate the expression of Gelsolin in breast cancer as well as its correlation with patients’ clinical parameters. Methods: In this study, 70 breast cancer patients, who had been referred to Imam Khomeini Complex Cancer Institute for surgery were randomly selected. Normal and tumor tissues were prepared and stored at -80°C. Gelsolin gene expression was measured using real-time polymerase chain reaction (PCR). Results: The results showed that Gelsolin gene expression had increased in 68.6% of the tumor samples. In addition, there was a significant association between increased levels of gene expression and tumor progression stages (P < 0.05). However, there was no significant association between increased levels of gene expression and other clinical findings, such as tumor grade, tumor size or patient age. Conclusion: The results revealed that Gelsolin gene expression had increased in the tumor samples. Gelsolin overexpression also resulted in increased lymph node involvement in breast cancer. The expression of this gene also increased significantly during advanced stages of breast cancer; however, there was no significant relation between Gelsolin expression and tumor grade or tumor size. https://bccr.tums.ac.ir/index.php/bccrj/article/view/289