Abstract：
BACKGROUND:The prognostic value of p53 protein expression in esophageal cancer has been evaluated, but the results remain inconclusive and no consensus has yet been achieved. This meta-analysis was conducted to quantitatively assess the prognostic significance of p53 expression in esophageal cancer. METHODS:Publications that assessed the clinical or prognostic significance of p53 expression in esophageal cancer and were published before July 1, 2015 were identified by searching the PubMed and EMBASE databases. A meta-analysis was performed to clarify the association between p53 expression and the clinical outcomes. RESULTS:A total of 36 publications met the criteria and included 4577 cases. Analysis of these data showed that p53 expression in esophageal cancer was significantly associated with poorer 5-year survival (RR = 1.30, 95 % CI: 1.11-1.51, P = 0.0008). Subgroup analyses according to histological type, continent of the patients, and cut-off value revealed the similar results. The results also indicated that p53 expression was highly associated with advanced TNM stages (I/II vs. III/IV, OR = 0.74, 95 % CI: 0.55-0.99, P = 0.04), lymph node metastasis (OR = 0.77, 95 % CI: 0.66-0.90, P = 0.001), and distant metastasis (OR = 0.46, 95 % CI: 0.26-0.80, P = 0.006). However, p53 expression in the included studies was not significantly associated with tumor size (≤ 5 cm vs. > 5 cm, OR = 1.13, 95 % CI: 0.92-1.40, P = 0.24), tumor location (upper + middle vs. lower, OR = 0.91, 95 % CI: 0.70-1.17, P = 0.45), grade of differentiation (well + moderate vs. poor, OR = 1.10, 95 % CI: 0.90-1.34, P = 0.35), and the depth of invasion (T1/T2 vs. T3/T4, OR = 0.86, 95 % CI: 0.71-1.03, P = 0.09). CONCLUSIONS:This meta-analysis showed that p53 expression may be a useful biomarker for predicting poorer prognosis in patients with esophageal cancer.
journal_name
BMC Cancerjournal_title
BMC cancerauthors
Wang L,Yu X,Li J,Zhang Z,Hou J,Li Fdoi
10.1186/s12885-016-2427-6subject
Has Abstractpub_date
2016-07-01 00:00:00pages
373issn
1471-2407pii
10.1186/s12885-016-2427-6journal_volume
16pub_type
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