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en Molecular Expression of Some Oncogenes and Predisposing Behaviors Contributing to the Aggressiveness of Prostate Cancer زیست شناسی سلولی Cell Biology مقالات اصلی Original Article Background: Prostate cancer is the second most common cancer in men in Iran. It can be treated in the early stages of the disease; therefore, early diagnosis can be lifesaving. The aim of this study was to investigate the molecular expression of some oncogenes and predisposing behaviors contributing to the aggressiveness of prostate cancer. Methods: In this case-control study, prostate cancer specimens were collected from both patients and healthy volunteers. Several factors such as age, family history, smoking, and stage of the disease, were investigated based on the criteria of this study. Real-time PCR was used to measure the expression of four oncogenes. Statistical analysis of our data was carried out using SPSS software version 22. Results: The X2 test showed that there was a difference in the incidence of prostate cancer in different age groups (X2= 9.30; p= 0.026). Although data analysis by the X2 test showed that family history had a significant effect on prostate cancer (X2= 14.43; p= 0.001), smoking did not show a significant effect on the incidence of this disorder (X2= 4.67; p= 0.097). The T2N1M0 stage is the most common form of prostate cancer in patients with family history of prostate cancer and the habit of smoking. Also, the expression of KRAS1P, GLB1L2, SChLAP1 and PACSIN3 oncogenes reduced in prostate cancer samples compared to the control group. Conclusions: Overall, functional interpretation of gene expression in the prostate tissue can affect tumor progression. Yet, further practical studies are required to reveal the accurate underlying mechanisms. <div></div> Age, Family History, Oncogenes, Prostate Cancer, Smoking. 60 68 http://rbmb.net/browse.php?a_code=A-10-576-1&slc_lang=en&sid=1 Mohammad Ghasem Kashanizadeh 100319475328460012728 100319475328460012728 No Azad University of Medical Sciences, Tehran , Iran. Fariba Rezaei Fakhrnezhad 100319475328460012729 100319475328460012729 No Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran. Saeede Yavari 100319475328460012730 100319475328460012730 No Science and Research Branch, Department of Biology, Islamic Azad University, Tehran, Iran. Homa Alizadeh 100319475328460012731 100319475328460012731 No Department of Genetics, Faculty of Biological Sciences, Islamic Azad University North Tehran Branch, Tehran, Iran Payam Hashemim 100319475328460012732 100319475328460012732 No Faculty of Medicine, Tehran University of Medical Science, Tehran , Iran. Amir Monfaredan 100319475328460012733 100319475328460012733 Yes Department of Hematology, Faculty of Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran.