title: Comparison of gene expression of SOX2 and OCT4 in normal tissue, polyps, and colon adenocarcinoma using immunohistochemical staining.
abstract: BACKGROUND
  Cancer stem cells have been isolated and characterized in all common cancers. SOX2 and OCT4 are important genes to enhance the self-renewal ability as activate stem cells and inhibit the genes that start differentiation and thus maintain the self-renewal ability of stem cells. Also, the aim of this study is "Comparison of gene expression of SOX2 and OCT4 in normal tissue, polyps, and colon adenocarcinoma using immunohistochemical staining."
  
  
  METHODS
  This cross-sectional study conducted on 20 patients so that for each patient, a sample of healthy tissue, dysplastic polyp tissue, and colon adenocarcinoma were provided as microscopic sections and staining on each tissue was performed through immunohistochemistry method by markers OCT4 and SOX2. The collected data were interred into SPSS version 18.0, (SPSS Inc., Chicago, IL, USA) software and the level of significance were considered as <0.05.
  
  
  RESULTS
  The study sample consisted of 20 patients including 11 men (55%) and 9 women (45%) with a mean age of 55.6 ± 9.88 years. There was no association between Oct4 and colorectal cancer (CRC) patients (P > 0.05), but there was a significant correlation between Sox2 expression and CRC (P < 0.05). Patients in many aspects such as race, type of polyp, presence of lymph node, grade and intensity of Sox2 in different types of patients' tissues (P < 0.05).
  
  
  CONCLUSIONS
  Regarding our findings, the expression of Sox2 would be a liable marker for evaluating of cancer progression and could be a treatment target of CRC cells.
authors.affiliation: Department of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Ardeshir
authors.initials: A
authors.lastname: Talebi
authors.affiliation: Department of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Kianoosh
authors.initials: K
authors.lastname: Kianersi
authors.affiliation: Department of Pathology, Isfahan University of Medical Sciences, Isfahan, Iran.
authors.forename: Mozhdeh
authors.initials: M
authors.lastname: Beiraghdar
keywords: Colon adenocarcinoma; OCT4; SOX2; colorectal cancer; dysplastic polyp; immunohistochemical