Journal of Capital Medical University ›› 2014, Vol. 35 ›› Issue (4): 501-506.doi: 10.3969/j.issn.1006-7795.2014.04.024

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Clinical importance of glucose-regulated protein 78 and glucose-regulated protein 94 expression and its correlation with prognosis in gastric cancer

Wei Hua1, Jing Hong2, Wu Jiang2, Zhang Donghang1   

  1. 1. Department of Endoscopy, Huaihe Hospital, Henan University, Kaifeng 475000, Henan Province, China;
    2. Department of Pathology, Huaihe Hospital, Henan University, Kaifeng 475000, Henan Province, China
  • Received:2014-05-22 Online:2014-08-21 Published:2014-07-22

Abstract:

Objective This study aimed to determine the correlation of glucose-regulated protein 78(GRP78) and glucose-regulated protein 94(GRP94) expression with clinical features and its prognostic value in gastric cancer(GC). Methods Western blotting and immunohistochemistry(IHC) were used to estimate the GRP78 and GRP94 expression in GC and distal margin of resected GC tissues. The association of GRP78 and GRP94 protein expression with clinical features and GC prognosis was determined by Kaplan-Meier curves. Results GRP78 and GRP94 immunostaining dots located predominantly in the cytoplasm and plasma membrane. Both GRP78 and GRP94 were positively correlated with differentiation, and negatively with lymph node metastasis and TNM stage(P<0.05). The mean survival time of GC patients with high and low expression of GRP78 and GRP94 were 23.51±2.32 and (37.54±3.24)months, 21.31±1.46 and (40.02±2.19)months, respectively, and the overall 5 year survival rate 21.23% and 41.42%, 20.73% and 43.86%, respectively(log-rank test, P<0.01). TNM stage and GRP78 and GRP94 were independent prognostic factors of GC. Conclusion High protein expression of GRP78 and GRP94 may correlate with poor prognosis of GC.

Key words: gastric cancer, glucose-regulated protein 78, glucose-regulated protein 94, biomarker, prognosis

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