Mersin University, Turkey
Leyla Bahar, after graduating from Cukurova University Faculty of Medicine, she worked as a medical practitioner in Mersin until 2002. In Department of Histology-Embryology she completed PhD in Mersin University Faculty of Medicine in 2008. She has published more than 20 papers and announcement in journals and has been serving as a consultant editor and editorial board member of reputable. Leyla Bahar still continues to work as a scientist and an assistant professor at Mersin University who is working on many issues and as peer-review in journals.
Colorectal cancer (CRC) arises from the colorectal epithelium as a result of the accumulation of genetic alterations in defined oncogenes and tumour suppressor genes. The molecular changes occurring during the development of the tumor must be investigated in order to understand the carcinogenesis. The cyclooxygenase (COX) isoenzymes, COX-1 and COX-2, catalyze the formation of prostaglandins, thromboxane, and levuloglandins. COX-2 is induced by inflammatory and mitogenic stimulants and prevails on tumor carcinogenesis by increasing the prostaglandin synthesis in inflammatory and neoplastic tissues. The aim of this study was to investigate the association the COX-2 gene -1195 A>G polymorphism and CRC risk. We also investigated the relationship between the COX-2 gene mRNA levels in peripheral blood monocytes and -1195 A>G polymorphism in CRC. Ninety individuals with CRC and 106 healthy individuals are included in our study. The genotypes are determined by using PCR-RFLP. RNA of individuals with CRC is isolated and RT-PCR is applied. Genotype distribution and allelic frequencies for -1195 A>G polymorphism of COX-2 gene weren’t significantly different between patients and controls. COX-2 gene mRNA levels and genotype distributions of this polymorphism no difference between CRC patients and controls. While one of the other factors of developing CRC; the advanced age and male gender increases the risk of developing CRC, BMI, smoking and alcohol intake have no affect on risk of developing CRC. Our study is the first study to investigate the relation between -1195 A>G polymorphism and mRNA levels of COX-2 gene in CRC in Turkish population.