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
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
目的检测基质金属蛋白酶-11(matrix met alloproteinase-11,MMP-11)在骨肉瘤组织及癌旁组织中的表达特征,并观察敲低其表达对骨肉瘤细胞生物学行为的影响。方法采用荧光定量PCR(Quantitative RT-PCR)和免疫组化染色技术检测40例骨肉瘤...目的检测基质金属蛋白酶-11(matrix met alloproteinase-11,MMP-11)在骨肉瘤组织及癌旁组织中的表达特征,并观察敲低其表达对骨肉瘤细胞生物学行为的影响。方法采用荧光定量PCR(Quantitative RT-PCR)和免疫组化染色技术检测40例骨肉瘤及癌旁组织中MMP-11的表达特征。体外试验采用骨肉瘤细胞系(HOS和Saos-2)转染MMP-11siRNA(试验组)和siRNA control(阴性对照组),48h后收集细胞,提取RNA和蛋白质,通过荧光定量PCR和蛋白质印迹观察两组细胞中MMP-11的表达变化;同时采用四甲基偶氮唑盐微量酶反应比色法(3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide,MTT)、细胞划痕试验以及流式细胞术探究敲低MMP-11表达对骨肉瘤细胞增殖、迁移及凋亡的影响。结果骨肉瘤组织中MMP-11mRNA的表达量较癌旁组织明显升高,癌旁组织中MMP-11mRNA的表达量为(1.0±0.22),则其在骨肉瘤组织中相对表达量为(3.94±0.79)(P<0.05)。免疫组化染色技术亦显示MMP-11蛋白在骨肉瘤组织的阳性率显著高于癌旁组织(P<0.05)。骨肉瘤细胞中转染MMP-11siRNA可显著降低细胞内源性MMP-11表达水平(P<0.05)。敲低MMP-11的表达可显著抑制HOS和Saos-2细胞的增殖及迁移能力,并增加细胞凋亡(P<0.05)。结论 MMP-11在骨肉瘤中呈现高表达状态,敲低其表达可抑制骨肉瘤细胞增殖、迁移并增加细胞凋亡,提示MMP-11在骨肉瘤的发生和发展过程发挥促癌作用。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.
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。
