Objective To investigate the expression of HMGB1 mRNA in endometrial carcinoma and its correlation with clinicopathological features of endometrial carcinoma. Methods Semi-quantitative RT-PCR method was used to detect the expression level of HMGB1 gene in 56 cases of endometrial carcinoma and 20 cases of normal endometrium. Results The expression of HMGB1 mRNA in endometrial carcinoma (0. 3512 ± 0. 0985 ) was significantly higher than that in normal endometrium (0. 2208 ± 0. 0170 ).There was a significant difference in the two groups( P ＜0. 05 ). Grouping by clinicopathological features,the expression of HMGB 1 mRNA in endometrial carcinoma had a correlation with clinical-surgical stage ( P＜0. 05), metastasis of lymph nodes ( P ＜ 0. 05), and depth of myometrial invasion ( P ＜ 0. 05 ). Conclusion The high level of HMGB1 mRNA indicated that HMGB1 might play an essential role in the genesis, growth, invasion and metastasis of endometrial carcinoma.

ObjectiveThe purpose of this study was to investigate the clinical significance of HMGB1 and Smac/DIABLO protein expression in epithelial ovarian cancer.MethodsImmunohistochemistry (IHC) and terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL) staining were used to detect the protein expression of HMGB1,Smac/DIABLO and cell apoptosis in 45 epithelial ovarian cancers by tissue microarray.ResultsThe protein expression of HMGB1 in epithelial ovarian cancers was significant higher than benign cancers and normal ovarian tissues( P ＜0.05).The protein expression of HMGB1 was related to the lymph node metastasis,which had a negative correlation with the cell apoptosis index ( rs =-0.583,P =0.000).The protein expression of Smac/DIABLO in epithelial ovarian cancers was significantly lower than benign cancers and normal ovarian tissues( P ＜0.05) ; the protein expression of HMGB1 in epithelial ovarian cancers had a negative relationship with protein expression of Smac/DIABLO( rs =-0.40,P =0.006).ConclusionsThe over-expression of HMGB1 in epithelial ovarian cancers may play an important part in the metastasis of the epithelial ovarian cancers.The over-expression of HMGB1 and the low-expression of Smac/DIABLO may take part in the occurrence and development of the epithelial ovarian cancers through abnormal cell apoptosis.