title: [Expressions of Ras and Sos1 in epithelial ovarian cancer tissues and their clinical significance].
abstract: OBJECTIVE
  To detect the expressions of Ras and Sos1 proteins in human epithelial ovarian cancer (EOC) tissues and explore their correlation with the clinicopathological features of the patients.
  
  
  METHODS
  The expressions of Ras and Sos1 proteins were detected immunohistochemically in 62 EOC tissues, 5 borderline ovarian cancer tissues, 15 benign epithelial ovarian neoplasm tissues, and 18 normal ovarian tissues.
  
  
  RESULTS
  The EOC tissues showed significantly higher expression levels of both Ras and Sos1 than the other tissues tested (P<0.05). In EOC tissues, Ras and Sos1 proteins were expressed mostly on the cell membrane and in the cytoplasm. The expression level of Ras was correlated with pathological types of the tumor (P<0.05) and was the highest in serous cystadenomcarcinoma; Sos1 expression did not show significant correlation with the clinicopathological indexes of the patients. High expressions of both Ras and Sos1 proteins were associated with shorter progression-free survival of the patients, but this association was not statistically significant.
  
  
  CONCLUSIONS
  Ras and Sos1 protein may participate in in the occurrence and development of EOC. The tissue-specific variation of Ras expression can lend support to a specific diagnosis of ovarian serous adenocarcinoma. The association of Ras and Sos1 protein expression with the tumor-free survival time of the patients awaits further investigation with a larger sample size.
authors.affiliation: Department of Obstetrics and Gynecology, First Affiliated Hospital, Chongqing Medical University, Chongqing 400016, China.E-mail: xzh771122@sina.com.
authors.forename: Zheng-Hua
authors.initials: ZH
authors.lastname: Xiao
authors.forename: Hua
authors.initials: H
authors.lastname: Linghu
authors.forename: Qian-Fen
authors.initials: QF
authors.lastname: Liu
mesh_terms: D000077216:Carcinoma, Ovarian Epithelial; D018572:Disease-Free Survival; D005260:Female; D011905:Genes, ras; D006801:Humans; D009375:Neoplasms, Glandular and Epithelial / Q000175:diagnosis / Q000235:genetics*; D010051:Ovarian Neoplasms / Q000175:diagnosis / Q000235:genetics*; D020837:SOS1 Protein / Q000235:genetics*
chemical_list: D020837:SOS1 Protein