Background Peroxisome proliferator activated receptor γ （PPARγ） is a ligand-activated transcription factor. Activation of PPARγ has recently been demonstrated to inhibit various tumor cells growth, progression an...Background Peroxisome proliferator activated receptor γ （PPARγ） is a ligand-activated transcription factor. Activation of PPARγ has recently been demonstrated to inhibit various tumor cells growth, progression and metastasis. E-cadherin-mediated cell adhesion system is now considered to be an “invasion suppressor system” in cancer tissues. Matrix metalloproteinases-2 （MMP-2） is a prerequisite for metastasizing tumor cells. However their correlation is still unknown in gastric carcinoma. The aim of this study was to assess the expression of PPAR7, E-cadherin, MMP-2 and their correlation in gastric carcinoma and metastases. Methods Gastric carcinoma tissues and their corresponding lymph nodes with metastases and the adjacent non-tumor tissues were obtained from 54 patients with gastric cancer who underwent gastrectomy. Expression of PPARγ, E-cadherin and MMP-2 was assessed by immunohistochemical staining. Results The nuclear expression level of PPARγ in neoplastic cells was significantly lower than that in the normal controls （P〈0.001）, with the expression of PPARγ being weaker in primary tumors compared with that in metastases. In all neoplastic cells, E-cadherin was expressed with abnormal patterns （cytoplasm pattern, cytoplasm and membrane pattern or absent）, compared with normal cells where E-cadherin was expressed with a normal pattern （membrane pattern）. Compared with the normal tissues, the expression level of E-cadherin decreased in primary tumors and further decreased in metastases （P〈0.001）. Membrane staining of MMP-2 was detected in the foveolar epithelia of normal gastric mucosa, whereas predominant cytoplasm staining of MMP-2 was found in malignant tissues. The expression of MMP-2 was stronger in metastatic tissues than in primary tumors. In neoplastic foci the expression of PPARγ was negatively correlated with MMP-2 expression （P〈0.05）. However, there was no correlation between E-cadherin and PPARγ or MM P-2 expression. Conclusions Down-regulation of PPAR�展开更多
目的探讨腹腔镜下射频消融术(LRFA)在肝癌患者中的临床应用价值及其对血清血管内皮生长因子(VEGF)和基质金属蛋白酶-2(MMP-2)的影响。方法收集2012年1月-2013年12月该院收治的晚期原发性肝癌患者120例,将患者随机分为LRFA组和对照组。L...目的探讨腹腔镜下射频消融术(LRFA)在肝癌患者中的临床应用价值及其对血清血管内皮生长因子(VEGF)和基质金属蛋白酶-2(MMP-2)的影响。方法收集2012年1月-2013年12月该院收治的晚期原发性肝癌患者120例,将患者随机分为LRFA组和对照组。LRFA组患者采用LRFA治疗后,继续采用FOLFOX4方案化疗;对照组仅采用PIAF方案化疗。主要观察指标为健康相关生存质量(HRQL)、实体瘤疗效评价(RECIST)等级、无进展生存期和2年死亡率;次要观察指标为血清VEGF和MMP-2水平。结果与对照组相比,LRFA组患者病情进展率明显降低(28.33%vs 50.00%,P=0.015);无进展生存期明显延长(500 d vs 380 d,P=0.013);临床干预后6个月时HRQL明显增高[(80.33±5.84)vs(65.87±9.59),P=0.000];临床干预后7、14和28天以及6个月时VEGF明显降低(P值均为0.000);临床干预后14和28天以及6个月时MMP-2明显降低(P值分别为0.003、0.001和0.000)。结论 LRFA明显改善了肝癌患者临床预后,并显著降低患者VEGF、MMP-2水平。展开更多
The action mechanism of matrix metalloproteinases-2 （MMP-2） and tissue inhibitor of metalloproteinases-2 （TIMP-2） in the genesis, development and degeneration of haemangioma was investigated by detecting their exp...The action mechanism of matrix metalloproteinases-2 （MMP-2） and tissue inhibitor of metalloproteinases-2 （TIMP-2） in the genesis, development and degeneration of haemangioma was investigated by detecting their expression in the tissue of haemangioma in different phases by using the immunohistochemistry. Fifty paraffin-embedded specimens of skin capillary haemangioma were collected, which were documented in the Department of Pathology, Renmin Hospital of Wuhan University from 2000 to 2006. All samples were stained by regular HE method, and proliferative cell nuclear antigen （PCNA） was tested by immunohistochemical S-P method. The samples were classified according to the Mulliken criteria and the expression pattern of PCNA. Immunohistochemical S-P method was ap- plied to detect the expression of MMP-2 and TIMP-2 in proliferative and degenerative phases of cutaneous capillary haemangioma, and in normal skin tissues. In combination with the detection of the expression of factor Ⅷ-related antigen, it was verified that in haemangioma tissues, the cells expressing MMP-2 and TIMP-2 were vascular endothelial cells. The MMP-2 and TIMP-2 expression was quantitatively analyzed by image analysis system （HPIAS-1000）, and one-way ANOVA（107） and SNK（q） test were done to analyze average absorbance （A） and positive area rate of immunohistochemically positive particles by using SPSS11.5. The results showed： （1） Among 50 samples of haemangioma, there were 26 proliferative haemangiomas, and 24 degenerative haemangiomas, respectively; （2） The expression of MMP-2 was weak in normal vascular endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression of MMP-2 in proliferative group was significantly higher than in degenerative group and control group （normal skin） （P〈0.05）, but there was no statistically significant difference between the latter two groups; （3） TIMP-2 was highly expressed in normal tissues, degenerative vascular en展开更多
基金the grants from the National Natural Science Foundation of China (No. 30671904 and No. 30670949)the Doctor Subjects Foundation of the Ministry of Education of the People's Republic of China (No. 20060558010).
文摘Background Peroxisome proliferator activated receptor γ （PPARγ） is a ligand-activated transcription factor. Activation of PPARγ has recently been demonstrated to inhibit various tumor cells growth, progression and metastasis. E-cadherin-mediated cell adhesion system is now considered to be an “invasion suppressor system” in cancer tissues. Matrix metalloproteinases-2 （MMP-2） is a prerequisite for metastasizing tumor cells. However their correlation is still unknown in gastric carcinoma. The aim of this study was to assess the expression of PPAR7, E-cadherin, MMP-2 and their correlation in gastric carcinoma and metastases. Methods Gastric carcinoma tissues and their corresponding lymph nodes with metastases and the adjacent non-tumor tissues were obtained from 54 patients with gastric cancer who underwent gastrectomy. Expression of PPARγ, E-cadherin and MMP-2 was assessed by immunohistochemical staining. Results The nuclear expression level of PPARγ in neoplastic cells was significantly lower than that in the normal controls （P〈0.001）, with the expression of PPARγ being weaker in primary tumors compared with that in metastases. In all neoplastic cells, E-cadherin was expressed with abnormal patterns （cytoplasm pattern, cytoplasm and membrane pattern or absent）, compared with normal cells where E-cadherin was expressed with a normal pattern （membrane pattern）. Compared with the normal tissues, the expression level of E-cadherin decreased in primary tumors and further decreased in metastases （P〈0.001）. Membrane staining of MMP-2 was detected in the foveolar epithelia of normal gastric mucosa, whereas predominant cytoplasm staining of MMP-2 was found in malignant tissues. The expression of MMP-2 was stronger in metastatic tissues than in primary tumors. In neoplastic foci the expression of PPARγ was negatively correlated with MMP-2 expression （P〈0.05）. However, there was no correlation between E-cadherin and PPARγ or MM P-2 expression. Conclusions Down-regulation of PPAR�
文摘目的探讨腹腔镜下射频消融术(LRFA)在肝癌患者中的临床应用价值及其对血清血管内皮生长因子(VEGF)和基质金属蛋白酶-2(MMP-2)的影响。方法收集2012年1月-2013年12月该院收治的晚期原发性肝癌患者120例,将患者随机分为LRFA组和对照组。LRFA组患者采用LRFA治疗后,继续采用FOLFOX4方案化疗;对照组仅采用PIAF方案化疗。主要观察指标为健康相关生存质量(HRQL)、实体瘤疗效评价(RECIST)等级、无进展生存期和2年死亡率;次要观察指标为血清VEGF和MMP-2水平。结果与对照组相比,LRFA组患者病情进展率明显降低(28.33%vs 50.00%,P=0.015);无进展生存期明显延长(500 d vs 380 d,P=0.013);临床干预后6个月时HRQL明显增高[(80.33±5.84)vs(65.87±9.59),P=0.000];临床干预后7、14和28天以及6个月时VEGF明显降低(P值均为0.000);临床干预后14和28天以及6个月时MMP-2明显降低(P值分别为0.003、0.001和0.000)。结论 LRFA明显改善了肝癌患者临床预后,并显著降低患者VEGF、MMP-2水平。
基金supported by a grant from the National Natural Sciences Foundation of China (No.30872688)
文摘The action mechanism of matrix metalloproteinases-2 （MMP-2） and tissue inhibitor of metalloproteinases-2 （TIMP-2） in the genesis, development and degeneration of haemangioma was investigated by detecting their expression in the tissue of haemangioma in different phases by using the immunohistochemistry. Fifty paraffin-embedded specimens of skin capillary haemangioma were collected, which were documented in the Department of Pathology, Renmin Hospital of Wuhan University from 2000 to 2006. All samples were stained by regular HE method, and proliferative cell nuclear antigen （PCNA） was tested by immunohistochemical S-P method. The samples were classified according to the Mulliken criteria and the expression pattern of PCNA. Immunohistochemical S-P method was ap- plied to detect the expression of MMP-2 and TIMP-2 in proliferative and degenerative phases of cutaneous capillary haemangioma, and in normal skin tissues. In combination with the detection of the expression of factor Ⅷ-related antigen, it was verified that in haemangioma tissues, the cells expressing MMP-2 and TIMP-2 were vascular endothelial cells. The MMP-2 and TIMP-2 expression was quantitatively analyzed by image analysis system （HPIAS-1000）, and one-way ANOVA（107） and SNK（q） test were done to analyze average absorbance （A） and positive area rate of immunohistochemically positive particles by using SPSS11.5. The results showed： （1） Among 50 samples of haemangioma, there were 26 proliferative haemangiomas, and 24 degenerative haemangiomas, respectively; （2） The expression of MMP-2 was weak in normal vascular endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression of MMP-2 in proliferative group was significantly higher than in degenerative group and control group （normal skin） （P〈0.05）, but there was no statistically significant difference between the latter two groups; （3） TIMP-2 was highly expressed in normal tissues, degenerative vascular en
