BACKGROUND: Interstitial collagenase has been considered as an essential enzyme for collagenolysis in liver fi-brosis, because type Ⅰ and Ⅲ collagens increase predominantly in liver fibrosis. The present study aimed...BACKGROUND: Interstitial collagenase has been considered as an essential enzyme for collagenolysis in liver fi-brosis, because type Ⅰ and Ⅲ collagens increase predominantly in liver fibrosis. The present study aimed to demonstrate the gene expression of matrix metalloproteinases-13 (MMP-13) in the progressive phases of ethanol induced experimental liver fibrosis in rats. METHODS: Thirty-four Sprague-Dawley rats were randomly divided into two groups. The experimental group (24 rats) was given ethanol (44% , 7 g/kg) every day and the control group (10) was given normal saline. Liver samples were harvested from experimental rats at 4, 12 and 24 weeks respectively. The kinetics of MMP-13 mRNA expression was assayed by semi-quantity reverse transcriptase-poly-merase chain reaction (RT-PCR). RESULTS: In normal rat liver, a faint band for MMP-13 mRNA was observed by RT-PCR (0.24±0.41). The gene expression of MMP-13 was increased in the liver of the rats treated with ethanol for 4 weeks (0. 62 ±0. 54), but it was not considered statistically significant (P >0.05). And the livers from 12-week-treated rats showed a marked mRNA expression(1.65 ±0.47, P <0. 01). Once fibrosis became prominent (24 weeks), a faint band of MMP-13 mRNA was observed (0.39±0.25). CONCLUSION: MMP-13 participates in the degradation of newly-formed matrix in the early phase of rat liver fibrosis induced by ethanol, and it was induced in a distinct time frame.展开更多
Objective： To investigate the relationship between matrix metalloproteinases-9 （MMP-9） and sialyl Lewis X （CD15s） antigen in invasion and metastasis of gastric carcinoma. Methods： Expression of CD105, MMP-9 and ...Objective： To investigate the relationship between matrix metalloproteinases-9 （MMP-9） and sialyl Lewis X （CD15s） antigen in invasion and metastasis of gastric carcinoma. Methods： Expression of CD105, MMP-9 and CD15s in 47 cases of gastric carcinoma undergone radical surgery were evaluated by SP immunohistochemical staining using the respective monoclonal antibody. The microvessel density （MVD） marked with CD105 was detected. Correlation between MVD and MMP-9, CD15s was also statistically analyzed. Results： The MVD in both MMP-9 and CD15s positive expression group was higher significantly than that in MMP-9 or CD15s positive expression alone group, and it was also significantly higher than that in both MMP-9 and CD15s negative expression group. Conclusion： MMP-9 is a marker of invasion and CD15s is a marker of metastasis in gastric carcinoma. Combining detection of MMP-9 and CD15s has certain clinical significance for diagnosis, treatment and assessing the prognosis for gastric caner.展开更多
Ulcerative colitis （UC） is a lifelong illness with profound emotional and social impacts, and could cause serious damage to large intestine, especially in colon. However, the pathogenesis of UC remained unclear. The...Ulcerative colitis （UC） is a lifelong illness with profound emotional and social impacts, and could cause serious damage to large intestine, especially in colon. However, the pathogenesis of UC remained unclear. The present study attempts to find out the role of matrix metalloproteinases-7 （MMP-7） and lysozyme in the pathogenesis of UC through a mice model induced by dextran sulfate sodium （DSS）. The UC model was evaluated both by disease activity index （DAI） and the intestinal histopathology. The results show that there is a high correlation between the DAI score and the pathological changes of colon. Interleukin-6 （IL-6） serum levels and large intestinal fluids levels in UC mice are always higher than that of the control groups, which might be associated with the degree of the inflammation damage in the colon. The change tendency of the MMP-7 mRNA and protein expressions are both up-regulated firstly and then down-regulated from 1 to 5 d in the colon, but only the MMP-7 protein is up-regulated at 7 d again. The up-regulated MMP-7 levels in the early stage of UC may play a protective role through the activated defensins, while the down-regulated levels in the mid-later stage of UC may be connected with the severe lesions in the colon. However, the up-regulated MMP-7 levels in the later stage of UC in the colon may also contribute to the tissue repair or be served as a marker to CRC （colorectal cancer）. The distribution of lysozyme protein indicates that there may be Paneth-like cells in the colon. Both the changes of MMP-7 and lysozyme in the small intestine may play a protective role for the safe environment of the whole gut, especially to the colon of UC.展开更多
目的观察MMP-11蛋白在胃癌组织的表达。方法采用免疫组织化学技术检测436份胃癌组织及92份邻近正常胃黏膜组织石蜡标本MMP-11表达情况。结果 MMP-11在正常胃黏膜组织的表达低于胃癌组织(0 vs 47.5%,x2=73.424,P<0.01)。MMP-11表达与...目的观察MMP-11蛋白在胃癌组织的表达。方法采用免疫组织化学技术检测436份胃癌组织及92份邻近正常胃黏膜组织石蜡标本MMP-11表达情况。结果 MMP-11在正常胃黏膜组织的表达低于胃癌组织(0 vs 47.5%,x2=73.424,P<0.01)。MMP-11表达与胃癌患者肿瘤大小、分化、侵犯深度、分期、淋巴转移、远处转移、脉管侵犯、Lauren分型相关(P<0.05),而与组织类型、性别无关。肿瘤逸5cm者MMP-11阳性表达率62.8%,明显高于肿瘤<5cm者的36.7%(x2=28.781,P<0.001);弥漫型者MMP-11阳性表达率明显高于肠型者(85.9%比10.7%,x2=246.751,P<0.001);T3、T4期者MMP-11阳性表达率分别为58.6%、96.2%,明显高于T1、T2期的10.5%、30.3%(x2=80.969,P<0.001);芋期、郁期胃癌患者MMP-11阳性表达率分别为68.8%、95.7%,高于玉期、域期患者的7.8%、14.4%(x2=198.170,P<0.001);脉管侵犯者MMP-11阳性表达率明显高于无脉管侵犯者(70.0%比16.4%,x2=122.193,P<0.001);淋巴结转移胃癌患者的MMP-11阳性表达率为68.9%,高于无淋巴结转移的12.7%(x2=130.382,P<0.001);有远处转移者的MMP-11阳性表达率95.1%,高于无远处转移者的39.7%(x2=64.455,P<0.001)。根据多因素Logistic回归分析,MMP11的表达在TNM分期高、脉管侵犯、有远处转移的患者中发生率高。结论 MMP-11或参与了胃癌的浸润转移进程,检测MMP-11的表达可作为判断胃癌生物学行为的重要参考指标。展开更多
文摘BACKGROUND: Interstitial collagenase has been considered as an essential enzyme for collagenolysis in liver fi-brosis, because type Ⅰ and Ⅲ collagens increase predominantly in liver fibrosis. The present study aimed to demonstrate the gene expression of matrix metalloproteinases-13 (MMP-13) in the progressive phases of ethanol induced experimental liver fibrosis in rats. METHODS: Thirty-four Sprague-Dawley rats were randomly divided into two groups. The experimental group (24 rats) was given ethanol (44% , 7 g/kg) every day and the control group (10) was given normal saline. Liver samples were harvested from experimental rats at 4, 12 and 24 weeks respectively. The kinetics of MMP-13 mRNA expression was assayed by semi-quantity reverse transcriptase-poly-merase chain reaction (RT-PCR). RESULTS: In normal rat liver, a faint band for MMP-13 mRNA was observed by RT-PCR (0.24±0.41). The gene expression of MMP-13 was increased in the liver of the rats treated with ethanol for 4 weeks (0. 62 ±0. 54), but it was not considered statistically significant (P >0.05). And the livers from 12-week-treated rats showed a marked mRNA expression(1.65 ±0.47, P <0. 01). Once fibrosis became prominent (24 weeks), a faint band of MMP-13 mRNA was observed (0.39±0.25). CONCLUSION: MMP-13 participates in the degradation of newly-formed matrix in the early phase of rat liver fibrosis induced by ethanol, and it was induced in a distinct time frame.
文摘Objective： To investigate the relationship between matrix metalloproteinases-9 （MMP-9） and sialyl Lewis X （CD15s） antigen in invasion and metastasis of gastric carcinoma. Methods： Expression of CD105, MMP-9 and CD15s in 47 cases of gastric carcinoma undergone radical surgery were evaluated by SP immunohistochemical staining using the respective monoclonal antibody. The microvessel density （MVD） marked with CD105 was detected. Correlation between MVD and MMP-9, CD15s was also statistically analyzed. Results： The MVD in both MMP-9 and CD15s positive expression group was higher significantly than that in MMP-9 or CD15s positive expression alone group, and it was also significantly higher than that in both MMP-9 and CD15s negative expression group. Conclusion： MMP-9 is a marker of invasion and CD15s is a marker of metastasis in gastric carcinoma. Combining detection of MMP-9 and CD15s has certain clinical significance for diagnosis, treatment and assessing the prognosis for gastric caner.
基金the grants from the National Natural Science Foundation of China(30800812)
文摘Ulcerative colitis （UC） is a lifelong illness with profound emotional and social impacts, and could cause serious damage to large intestine, especially in colon. However, the pathogenesis of UC remained unclear. The present study attempts to find out the role of matrix metalloproteinases-7 （MMP-7） and lysozyme in the pathogenesis of UC through a mice model induced by dextran sulfate sodium （DSS）. The UC model was evaluated both by disease activity index （DAI） and the intestinal histopathology. The results show that there is a high correlation between the DAI score and the pathological changes of colon. Interleukin-6 （IL-6） serum levels and large intestinal fluids levels in UC mice are always higher than that of the control groups, which might be associated with the degree of the inflammation damage in the colon. The change tendency of the MMP-7 mRNA and protein expressions are both up-regulated firstly and then down-regulated from 1 to 5 d in the colon, but only the MMP-7 protein is up-regulated at 7 d again. The up-regulated MMP-7 levels in the early stage of UC may play a protective role through the activated defensins, while the down-regulated levels in the mid-later stage of UC may be connected with the severe lesions in the colon. However, the up-regulated MMP-7 levels in the later stage of UC in the colon may also contribute to the tissue repair or be served as a marker to CRC （colorectal cancer）. The distribution of lysozyme protein indicates that there may be Paneth-like cells in the colon. Both the changes of MMP-7 and lysozyme in the small intestine may play a protective role for the safe environment of the whole gut, especially to the colon of UC.
文摘目的观察MMP-11蛋白在胃癌组织的表达。方法采用免疫组织化学技术检测436份胃癌组织及92份邻近正常胃黏膜组织石蜡标本MMP-11表达情况。结果 MMP-11在正常胃黏膜组织的表达低于胃癌组织(0 vs 47.5%,x2=73.424,P<0.01)。MMP-11表达与胃癌患者肿瘤大小、分化、侵犯深度、分期、淋巴转移、远处转移、脉管侵犯、Lauren分型相关(P<0.05),而与组织类型、性别无关。肿瘤逸5cm者MMP-11阳性表达率62.8%,明显高于肿瘤<5cm者的36.7%(x2=28.781,P<0.001);弥漫型者MMP-11阳性表达率明显高于肠型者(85.9%比10.7%,x2=246.751,P<0.001);T3、T4期者MMP-11阳性表达率分别为58.6%、96.2%,明显高于T1、T2期的10.5%、30.3%(x2=80.969,P<0.001);芋期、郁期胃癌患者MMP-11阳性表达率分别为68.8%、95.7%,高于玉期、域期患者的7.8%、14.4%(x2=198.170,P<0.001);脉管侵犯者MMP-11阳性表达率明显高于无脉管侵犯者(70.0%比16.4%,x2=122.193,P<0.001);淋巴结转移胃癌患者的MMP-11阳性表达率为68.9%,高于无淋巴结转移的12.7%(x2=130.382,P<0.001);有远处转移者的MMP-11阳性表达率95.1%,高于无远处转移者的39.7%(x2=64.455,P<0.001)。根据多因素Logistic回归分析,MMP11的表达在TNM分期高、脉管侵犯、有远处转移的患者中发生率高。结论 MMP-11或参与了胃癌的浸润转移进程,检测MMP-11的表达可作为判断胃癌生物学行为的重要参考指标。
