Prognostic value of Survivin and Livin in nasopharyngeal carcinoma.
OBJECTIVE
Survivin and Livin are new members from the family of anti-apoptotic factors. Increased levels of Survivin and Livin have been observed in many malignancies and correlated with poor prognosis. Survivin is expressed almost exclusively in proliferating cells, including various kinds of cancers, but Livin expression is relatively rare in cancer cells. Therefore, the present study examines the expressions of Survivin and Livin in nasopharyngeal carcinoma (NPC) and investigates whether their expression contributes to the prognosis of NPC.


METHODS
We investigated the expression of Survivin and Livin in 80 NPC samples using immunohistochemistry stain and correlated it with the survival of these patients using log-rank test and Cox multifactor regression analysis.


RESULTS
All the patients were followed up at least for 60 months. During the following period, 21 cases developed distant metastasis, 9 cases developed local-regional recurrence, and 5 developed both distant metastasis and local-regional recurrence. Among them, 30 patients died of recurrence of tumor. In addition, the expression of Survivin was related with distant metastasis. Patients with low Survivin expression had better overall survival, disease-free survival and distant metastasis-free survival rates than the group with high Survivin expression (P = .0086, .0097, and .0318, respectively). Cox regression analysis confirmed that high Survivin expression was related to worse prognosis in NPC patients. However Livin expression level was not related with the survival of patients with NPC.


CONCLUSIONS
NPC expresses high levels of Survivin and Livin, which may play an important role in the oncogenesis and tumor development. Over-expression of Survivin was related with poor prognosis. We suggest that the determination of Survivin expression may provide predictive information on NPC patients.
Xiang
Yanqun
Y
Department of Nasopharyngeal Carcinoma, Cancer Center, Sun Yat-sen University, Guangzhou, P.R. China.
Yao
Herui
H
Wang
Shusen
S
Hong
Minghuang
M
He
Jiehua
J
Cao
Sumei
S
Min
Huaqing
H
Song
Erwei
E
Guo
Xiang
X
D048868:Adaptor Proteins, Signal Transducing / Q000032:analysis*; D000328:Adult; D000368:Aged; D014408:Biomarkers, Tumor / Q000032:analysis; D001707:Biopsy, Needle; D002294:Carcinoma, Squamous Cell / Q000097:blood / Q000401:mortality* / Q000473:pathology*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D051034:Inhibitor of Apoptosis Proteins / Q000032:analysis*; D008297:Male; D008869:Microtubule-Associated Proteins / Q000032:analysis*; D008875:Middle Aged; D015999:Multivariate Analysis; D009303:Nasopharyngeal Neoplasms / Q000097:blood / Q000401:mortality* / Q000473:pathology*; D009363:Neoplasm Proteins / Q000032:analysis*; D009367:Neoplasm Staging; D011379:Prognosis; D016016:Proportional Hazards Models; D012189:Retrospective Studies; D018570:Risk Assessment; D012680:Sensitivity and Specificity; D016019:Survival Analysis; D000077022:Survivin
D048868:Adaptor Proteins, Signal Transducing; C107489:BIRC5 protein, human; C419866:BIRC7 protein, human; D014408:Biomarkers, Tumor; D051034:Inhibitor of Apoptosis Proteins; D008869:Microtubule-Associated Proteins; D009363:Neoplasm Proteins; D000077022:Survivin