AIM:To investigate maspin expression in tumorigenesis and progression of gastric cancer and to explore its relevant molecular mechanisms.METHODS:Formalin-fixed and paraffin-embedded tissues from normal mucosa (n=182),...AIM:To investigate maspin expression in tumorigenesis and progression of gastric cancer and to explore its relevant molecular mechanisms.METHODS:Formalin-fixed and paraffin-embedded tissues from normal mucosa (n=182), dysplasia (n=69), cancer (n=l13) of the stomach were studied for maspin expression by immunohistochemistry. Microvessel density (MVD) in gastric cancer was labeled using anti-CD34 antibody. Maspin expression was compared with clinical parameters and MVD of tumors. Caspase-3 expression was also detected in gastric carcinoma by immunohistochemistry. The relationship between Caspase-3 and maspin expression was concerned as well.RESULTS:The positive rates of maspin expression were 79.8% (145/182), 75.4%(52/69) and 50.4%(57/113) in normal mucosa, dysplasia and cancer of the stomach,respectively.Cancer less frequently expressed maspin than normal mucosa and dysplasia (P<0.05).Maspin expression showed a significantly negative association with invasive depth, metastasis, Lauren's and Nakamura's classification (P<0.05),but not with tumor size, Borrmann's classification,growth pattern or TNIVl staging (P>0.05). The positive rate of Caspase-3 was significantly lower in gastric cancer than in normal gastric mucosa (P<0.05,32.7% vs 50.4%). It was noteworthy that maspin expression was negatively correlated with MVD, but positively correlated with expression of Caspase-3 in gastric cancer (P<0.05).CONCLUSION:Down-regulated maspin expression is a late molecular event in gastric carcinogenesis. Reduced expression of maspin contributes to progression of gastric cancer probably by inhibiting cell adhesion, enhandng cell mobility,decreasing cell apoptosis and facilitating angiogenesis.Additionally altered expression of maspin underlies the molecular mechanism of differentiation of gastric cancer and supports the different histogenetic pathways of intestinal and diffuse gastric cancers. Maspin expression can be considered as an effective and objective marker to reveal biological behaviors of gastric cancer.展开更多
目的探讨乳腺丝氨酸蛋白酶抑制剂(Maspin)对肺癌患者生存的预后价值。方法通过搜索PubMed、Embase、Web of Science、中国知网、万方数据库,对从建库至2018年10月31日发表的关于Maspin与肺癌预后相关的文献进行统计分析,通过纳入文献中...目的探讨乳腺丝氨酸蛋白酶抑制剂(Maspin)对肺癌患者生存的预后价值。方法通过搜索PubMed、Embase、Web of Science、中国知网、万方数据库,对从建库至2018年10月31日发表的关于Maspin与肺癌预后相关的文献进行统计分析,通过纳入文献中患者的临床特征,计算Maspin的风险比(HR),并运用RevMan5.3进行数据分析。结果共纳入12篇文献。结果显示,在肺癌患者中,高表达的Maspin其总生存时间(OS)的HR及其95%可信区间(95%CI)为0.86[0.50,1.48],疾病特异生存时间(DSS)的HR及其95%CI为1.26[0.98,1.61],提示Maspin与肺癌患者预后没有明显关系,其无疾病生存时间(DFS)的HR及其95%CI为1.66[1.40,1.97],提示高表达Maspin预示着肺癌患者更差的DFS。OS的发表偏倚P值为0.107,表明该统计结果没有明显的发表偏倚。结论高表达的Maspin与肺癌患者预后没有明显关系,但可能预示着更差的DFS,其临床应用价值尚需进一步验证。展开更多
文摘AIM:To investigate maspin expression in tumorigenesis and progression of gastric cancer and to explore its relevant molecular mechanisms.METHODS:Formalin-fixed and paraffin-embedded tissues from normal mucosa (n=182), dysplasia (n=69), cancer (n=l13) of the stomach were studied for maspin expression by immunohistochemistry. Microvessel density (MVD) in gastric cancer was labeled using anti-CD34 antibody. Maspin expression was compared with clinical parameters and MVD of tumors. Caspase-3 expression was also detected in gastric carcinoma by immunohistochemistry. The relationship between Caspase-3 and maspin expression was concerned as well.RESULTS:The positive rates of maspin expression were 79.8% (145/182), 75.4%(52/69) and 50.4%(57/113) in normal mucosa, dysplasia and cancer of the stomach,respectively.Cancer less frequently expressed maspin than normal mucosa and dysplasia (P<0.05).Maspin expression showed a significantly negative association with invasive depth, metastasis, Lauren's and Nakamura's classification (P<0.05),but not with tumor size, Borrmann's classification,growth pattern or TNIVl staging (P>0.05). The positive rate of Caspase-3 was significantly lower in gastric cancer than in normal gastric mucosa (P<0.05,32.7% vs 50.4%). It was noteworthy that maspin expression was negatively correlated with MVD, but positively correlated with expression of Caspase-3 in gastric cancer (P<0.05).CONCLUSION:Down-regulated maspin expression is a late molecular event in gastric carcinogenesis. Reduced expression of maspin contributes to progression of gastric cancer probably by inhibiting cell adhesion, enhandng cell mobility,decreasing cell apoptosis and facilitating angiogenesis.Additionally altered expression of maspin underlies the molecular mechanism of differentiation of gastric cancer and supports the different histogenetic pathways of intestinal and diffuse gastric cancers. Maspin expression can be considered as an effective and objective marker to reveal biological behaviors of gastric cancer.
文摘目的探讨乳腺丝氨酸蛋白酶抑制剂(Maspin)对肺癌患者生存的预后价值。方法通过搜索PubMed、Embase、Web of Science、中国知网、万方数据库,对从建库至2018年10月31日发表的关于Maspin与肺癌预后相关的文献进行统计分析,通过纳入文献中患者的临床特征,计算Maspin的风险比(HR),并运用RevMan5.3进行数据分析。结果共纳入12篇文献。结果显示,在肺癌患者中,高表达的Maspin其总生存时间(OS)的HR及其95%可信区间(95%CI)为0.86[0.50,1.48],疾病特异生存时间(DSS)的HR及其95%CI为1.26[0.98,1.61],提示Maspin与肺癌患者预后没有明显关系,其无疾病生存时间(DFS)的HR及其95%CI为1.66[1.40,1.97],提示高表达Maspin预示着肺癌患者更差的DFS。OS的发表偏倚P值为0.107,表明该统计结果没有明显的发表偏倚。结论高表达的Maspin与肺癌患者预后没有明显关系,但可能预示着更差的DFS,其临床应用价值尚需进一步验证。