Diagnostic Relevance of Overexpressed Serine Threonine Tyrosine Kinase/Novel Oncogene with Kinase Domain (STYK1/NOK) mRNA in Colorectal Cancer

  • Orang, Ayla Valinezhad (Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz) ;
  • Safaralizadeh, Reza (Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz) ;
  • Hosseinpour Feizi, Mohammad Ali (Department of Animal Biology, Faculty of Natural Sciences, University of Tabriz) ;
  • Somi, Mohammad Hossein (Liver and Gastroenterology Diseases Research Center, Tabriz University of Medical Sciences)
  • Published : 2014.08.30


Background: Alterations in gene expression levels or mutations of tyrosine kinases are detected in some human cancers. In this study, we examined whether serine threonine tyrosine kinase 1 (STYK1)/novel oncogene with kinase domain (NOK) is overexpressed in patients with colorectal cancer. We also examined the clinical relevance of STYK1/NOK expression in cancer tissues. Materials and Methods: In tumor samples of patients with colorectal cancer and their matched non-cancerous samples, STYK1/NOK messenger RNA (mRNA) expression was analyzed by quantitative reverse transcriptase polymerase chain reaction. Associations between the expression levels of STYK1/NOK and clinicopathological characteristics of colorectal cancer were also assessed using Mann-Whitney U and Kruskal-Wallis tests. Results: Upregulation of STYK1/NOK was found in cancer tissues even at early stage of colorectal cancer compared to normal adjacent tissues. The optimal cutoff point of 0.198 the STYK1/NOK expression showed 0.78 sensitivity and 0.75 specificity for diagnosis. Overexpressed STYK1/NOK was correlated with tumor size but had no association with other clinicopathological characteristics of colorectal cancer. Conclusions: These results indicate that STYK1/NOK mRNA is widely expressed in the patients with colorectal cancer and suggest that inhibition of this molecule could potentially serve as a novel therapeutic target.


Colorectal cancer;oncogene;tyrosine kinase;NOK/STYK1;diagnosis


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