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 endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression level of TIMP-2 in proliferative phase was significantly lower than in degenerative phase （P〈0.05）, and the expression of TIMP-2 in proliferative phase was significantly different from that in degenerative phase and normal tissues （P〈0.05）. It was concluded that in proliferative phase of haemangioma, MMP-2 may promote over-proliferation of endothelial cells of haemangioma, and in degenerative phase, TIMP-2 can inhibit the proliferation of endothelial cells of haemangioma. The two substances play important roles in the genesis, development and degeneration of haemangiomas.展开更多
目的探讨自然分娩初产妇血清基质金属蛋白酶组织抑制因子-1(tissue inhibitor of metall oproteinase-1,TIMP-1)、血管内皮生长因子(vascular endothelial growth factor,VEGF)水平对产后压力性尿失禁(post partum stress urinary incon...目的探讨自然分娩初产妇血清基质金属蛋白酶组织抑制因子-1(tissue inhibitor of metall oproteinase-1,TIMP-1)、血管内皮生长因子(vascular endothelial growth factor,VEGF)水平对产后压力性尿失禁(post partum stress urinary incontinence,PSUI)严重程度的预测价值。方法选取2019年12月至2023年7月220例PSUI自然分娩初产妇为病例组,根据尿垫试验结果分为轻度组158例和中重度组62例。另纳入同期220例无PSUI的自然分娩初产妇作为对照组。采用ELISA法检测入组者血清TIMP-1、VEGF水平;采用Pearson法分析PSUI患者血清TIMP-1与VEGF的相关性;采用多因素Logistic回归分析PSUI患者疾病严重程度的影响因素;采用受试者工作特征曲线分析血清TIMP-1、VEGF对PSUI患者疾病严重程度的预测价值。结果病例组血清TIMP-1水平显著低于对照组,血清VEGF水平显著高于对照组(P<0.01)。中重度组血清TIMP-1水平显著低于轻度组,血清VEGF水平、年龄≥35岁比例、新生儿体质量显著高于轻度组(P<0.05,P<0.01)。PSUI患者血清TIMP-1与VEGF呈负相关(r=-0.671,P<0.05)。TIMP-1是PSUI患者疾病程度加重的保护因素(P<0.01),VEGF是PSUI患者疾病程度加重的危险因素(P<0.01)。TIMP-1、VEGF单独及联合预测PSUI患者疾病严重程度的曲线下面积(area under curve,AUC)分别为0.857、0.808、0.901,其中联合预测的AUC高于二者单独预测(P<0.01)。结论PSUI患者血清TIMP-1低表达,VEGF高表达,且TIMP-1、VEGF与病情程度密切相关,二者联合在预测PSUI患者疾病严重程度方面有较高的价值。展开更多
该文基于英国国家语料库,对前缀pro-以及前缀pre-进行语义词源上的对比研究,以及两者所构成词的词性的对比。研究发现,前缀pro-拥有更多的语义。另外,前缀pro-所构成词的词汇往往有一个动作的倾向性,而前缀pre-构成的词往往在时间有一...该文基于英国国家语料库,对前缀pro-以及前缀pre-进行语义词源上的对比研究,以及两者所构成词的词性的对比。研究发现,前缀pro-拥有更多的语义。另外,前缀pro-所构成词的词汇往往有一个动作的倾向性,而前缀pre-构成的词往往在时间有一个提前。在语义相同的情况下,两个前缀均表示"before"时,pre-构成词的词性更多;而在前缀表示"front"时,两者相反,前缀pro-构成词的词性更多;在表示"in front of"时,两者构成词词性均为动词,且词汇量较少。展开更多
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 endothelial cells, cytoplasm of connective tissues and extracellular matrix around blood vessels. The expression level of TIMP-2 in proliferative phase was significantly lower than in degenerative phase （P〈0.05）, and the expression of TIMP-2 in proliferative phase was significantly different from that in degenerative phase and normal tissues （P〈0.05）. It was concluded that in proliferative phase of haemangioma, MMP-2 may promote over-proliferation of endothelial cells of haemangioma, and in degenerative phase, TIMP-2 can inhibit the proliferation of endothelial cells of haemangioma. The two substances play important roles in the genesis, development and degeneration of haemangiomas.
文摘目的探讨自然分娩初产妇血清基质金属蛋白酶组织抑制因子-1(tissue inhibitor of metall oproteinase-1,TIMP-1)、血管内皮生长因子(vascular endothelial growth factor,VEGF)水平对产后压力性尿失禁(post partum stress urinary incontinence,PSUI)严重程度的预测价值。方法选取2019年12月至2023年7月220例PSUI自然分娩初产妇为病例组,根据尿垫试验结果分为轻度组158例和中重度组62例。另纳入同期220例无PSUI的自然分娩初产妇作为对照组。采用ELISA法检测入组者血清TIMP-1、VEGF水平;采用Pearson法分析PSUI患者血清TIMP-1与VEGF的相关性;采用多因素Logistic回归分析PSUI患者疾病严重程度的影响因素;采用受试者工作特征曲线分析血清TIMP-1、VEGF对PSUI患者疾病严重程度的预测价值。结果病例组血清TIMP-1水平显著低于对照组,血清VEGF水平显著高于对照组(P<0.01)。中重度组血清TIMP-1水平显著低于轻度组,血清VEGF水平、年龄≥35岁比例、新生儿体质量显著高于轻度组(P<0.05,P<0.01)。PSUI患者血清TIMP-1与VEGF呈负相关(r=-0.671,P<0.05)。TIMP-1是PSUI患者疾病程度加重的保护因素(P<0.01),VEGF是PSUI患者疾病程度加重的危险因素(P<0.01)。TIMP-1、VEGF单独及联合预测PSUI患者疾病严重程度的曲线下面积(area under curve,AUC)分别为0.857、0.808、0.901,其中联合预测的AUC高于二者单独预测(P<0.01)。结论PSUI患者血清TIMP-1低表达,VEGF高表达,且TIMP-1、VEGF与病情程度密切相关,二者联合在预测PSUI患者疾病严重程度方面有较高的价值。
文摘该文基于英国国家语料库,对前缀pro-以及前缀pre-进行语义词源上的对比研究,以及两者所构成词的词性的对比。研究发现,前缀pro-拥有更多的语义。另外,前缀pro-所构成词的词汇往往有一个动作的倾向性,而前缀pre-构成的词往往在时间有一个提前。在语义相同的情况下,两个前缀均表示"before"时,pre-构成词的词性更多;而在前缀表示"front"时,两者相反,前缀pro-构成词的词性更多;在表示"in front of"时,两者构成词词性均为动词,且词汇量较少。
