title: DJ-1 could predict worse prognosis in esophageal squamous cell carcinoma.
abstract: Recent studies have revealed an oncogenic role of DJ-1 through its ability to transform normal cells, prevent oxidative damage, and inhibit apoptosis. However, its role in esophageal squamous cell carcinoma (ESCC) is unknown. In this study, by immunohistochemistry, we analyzed the expression of DJ-1 in 81 ESCC tumors, 31 paired nonneoplastic esophageal epithelia, and 19 paired ESCC lymph node metastases. We found that cytoplasmic DJ-1 expression was significantly higher in ESCC and ESCC lymph node metastases than in nonneoplastic esophageal epithelium. ESCC specimens with high distant metastatic potential also had a significantly higher level of nuclear DJ-1 expression (P = 0.018). By Kaplan-Meier analysis, we found that a high level of nuclear DJ-1 was significantly associated with poorer patient survival in our cohort (P = 0.028). To investigate whether DJ-1 promotes ESCC progression through phosphatidylinositol 3-kinase pathway and modulation of apoptosis, we performed immunohistochemistry of pAkt and Daxx. We found that DJ-1 expression was significantly associated with pAkt, whereas nuclear DJ-1 expression was significantly correlated with nuclear expression of Daxx. These results suggest that phosphatidylinositol 3-kinase pathway and Daxx-regulated apoptosis might be important in DJ-1-mediated ESCC progression. By using multivariate Cox regression, we further showed that T(4) stage (P = 0.003) and DJ-1 (P = 0.034) are independent predictors of patient survival. In conclusion, our results suggest that DJ-1 plays a very important role in transformation and progression of ESCC and may be used as a prognostic marker in ESCC.
authors.affiliation: Department of Pathology, Queen Mary Hospital, Hong Kong, People's Republic of China.
authors.forename: Hiu-Fung
authors.initials: HF
authors.lastname: Yuen
authors.forename: Yuen-Piu
authors.initials: YP
authors.lastname: Chan
authors.forename: Simon
authors.initials: S
authors.lastname: Law
authors.forename: Gopesh
authors.initials: G
authors.lastname: Srivastava
authors.forename: Mohamed
authors.initials: M
authors.lastname: El-Tanani
authors.forename: Tak-Wah
authors.initials: TW
authors.lastname: Mak
authors.forename: Kwok-Wah
authors.initials: KW
authors.lastname: Chan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017209:Apoptosis; D014408:Biomarkers, Tumor / Q000235:genetics; D002294:Carcinoma, Squamous Cell / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D016009:Chi-Square Distribution; D018450:Disease Progression; D004938:Esophageal Neoplasms / Q000235:genetics* / Q000401:mortality / Q000473:pathology; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics*; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D015513:Oncogene Proteins / Q000235:genetics*; D011379:Prognosis; D016016:Proportional Hazards Models; D000071617:Protein Deglycase DJ-1; D018709:Statistics, Nonparametric; D015996:Survival Rate
chemical_list: D014408:Biomarkers, Tumor; D047908:Intracellular Signaling Peptides and Proteins; D015513:Oncogene Proteins; C105131:PARK7 protein, human; D000071617:Protein Deglycase DJ-1