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排序方式: 共有112条查询结果,搜索用时 31 毫秒
71.
目的:研究舌鳞癌组织中细胞外基质金属蛋白酶诱导因子(EMMPRIN)的表达及其与舌癌患者临床病理特征和生存期之间的相关性。方法:应用SP免疫组织化学法,检测68例舌鳞癌组织及相应的癌旁组织中EMMPRIN的表达情况,并对68例舌鳞癌患者进行随访观察。应用非参数秩和检验检测两个独立样本的EMMPRIN的表达差异,应用SPSS 13.0软件包进行生存分析;应用Cox比例风险模型分析预后。结果:EMMPRIN在舌鳞癌组织中的表达阳性率高于相应的癌旁组织(P〈0.05)。舌鳞癌组织中EMMPRIN的表达与肿瘤大小和临床分期密切相关,与性别、年龄、淋巴结转移和肿瘤病理分化程度不相关。Cox比例风险模型多因素预后分析显示,EMMPRIN表达是影响舌鳞癌患者预后的独立因素。结论:EMMPRIN可以作为舌鳞癌预后判断的参考指标,并有望成为口腔癌生物治疗的潜在靶点。  相似文献   
72.
《Platelets》2013,24(8):639-642
Abstract

Extracellular matrix metalloproteinase inducer (EMMPRIN; CD147), which binds to the platelet-specific collagen receptor glycoprotein (GP) VI, is expressed in a range of cell types including platelets and leukocytes, and has been implicated in neoplastic disease and atherosclerotic coronary disease. Both CD147 and GPVI can be shed from cell membranes and detected in plasma. However, while the relationship between soluble CD147 (sCD147), soluble GPVI (sGPVI) and standard markers of platelet activation has received little attention, such analysis may help reveal pathways mediating release of sCD147. We investigated the relationship between sCD147 and platelet markers including sGPVI, soluble and platelet-bound CD62P (P-selectin), active αIIbβ3 (assessed by PAC-1 binding) and platelet CD147 in 25 patients with stable angina pectoris (SAP), 13 patients with no coronary artery disease (CAD) and 10 healthy donors. Plasma levels of sCD147 significantly correlated with sGPVI (r?=?0.46, p?=?.004), but did not correlate with any other platelet markers examined. Linear regression analysis identified that sCD147 levels could be predicted by sGPVI levels (β?=?.445, p?=?0.003) and age (β?=?0.304, p?=?0.038), but were independent of potential clinical confounders such as CAD, diabetes and medication usage. As sCD147 strongly correlates with platelet-specific sGPVI, a common platelet source and/or mechanism of release may contribute to sCD147 levels in vivo.  相似文献   
73.
Cyclophilin A (CyPA), an abundantly expressed protein belonging to the immunophilin family, is involved in a variety of physiological and pathological activities together with its extracellular receptor, CD147. Many studies have provided compelling evidence supporting critical roles of CyPA in immune and infectious diseases and malignant tumours. Recent studies have revealed that both CyPA and CD147 strongly promote cardiovascular inflammation, myocardial ischaemia-reperfusion injury, and myocardial remodelling processes. Here, we review the potential roles of CyPA and CD147 in cardiac remodelling and their implications for the development of novel pharmacological therapies for heart failure.  相似文献   
74.
动脉粥样硬化( atherosclerosis,AS)是一种复杂的慢性血管炎症疾病,多种AS相关细胞与其表达的促炎因子相互作用促进其发生发展.近年研究发现,AS斑块中存在大量基质金属蛋白酶诱导因子(EMMPRIN).EMMPRIN是一种广泛表达于人体多种组织的单次跨膜糖蛋白,为免疫球蛋白超家族成员.作为一种重要的促炎因子,EMMPRIN通过与其相关蛋白如亲环素A、EMMPRIN自身及小窝蛋白-1等相互作用,影响内皮细胞、T淋巴细胞、单核细胞、血管平滑肌细胞、血小板的正常功能,促进AS的发展.以EMMPRIN及其相互作用蛋白为靶点的干预措施可能对AS的防治具有潜在的价值.  相似文献   
75.
OBJECTIVE To investigate the expression of extracellular matrix metalloproteinase inducer (EMMPRIN) and vascular endothelial growth factor (VEGF) in lung carcinomas,and to clarify their roles in carcinoma progression.METHODS Expression of EMMPRIN and VEGF was examined with tissue microarrays (TMAs) of lung carcinomas (n = 181),and their suppression in adjacent normal lung samples (n = 40) were determined by immunohistochemistry.The results were compared with clinicopathological findings for the same tumors.RESULTS Both EMMPRIN and VEGF were occasionally expressed in pseudostratified columnar epithelium and frequently in lung carcinomas.Histologically,EMMPRIN and VEGF displayed higher levels in large (LCC) cell carcinomas than adenocarcinoma (AD),squamous (SQ) and small cell carcinomas (SCC) (P < 0.05).EMMPRIN was more highly expressed in SQ as compared with AD (P < 0.05),while the converse was true for VEGF (P < 0.05).Binding was generally more intense for EMMPRIN in samples from male compared to female patients (P < 0.05),whereas the latter tended to exhibit more VEGF expression (P < 0.05).Positive associations of VEGF expression with the TNM stage and amounts of EMMPRIN were noted in the lung carcinomas (P < 0.05).CONCLUSION EMMPRIN and VEGF possibly contribute to physiological repair of normal lung and histogenesis of lung carcinoma.Both proteins might be involved in the molecular basis for differences in the incidence of lung carcinoma between men and women.  相似文献   
76.
目的探讨人脑星形细胞瘤中细胞外基质金属蛋白酶诱导因子(EMMPRIN)和基质金属蛋白酶-9(MMP-9)的表达,以及它们在星形细胞瘤侵袭性生长中的作用。方法采用免疫组织化学S-P法对49例星形细胞瘤、11例脑膜瘤和7例正常人脑组织中的EMMPRIN和MMP-9的表达进行检测。结果EMMPRIN和MMP-9的表达在Ⅲ-Ⅳ级星形细胞瘤显著高于Ⅰ-Ⅱ级星形细胞瘤(P<0.01),在Ⅰ-Ⅱ级星形细胞瘤又显著高于脑膜瘤(P<0.01),在脑膜瘤高于正常脑组织(P<0.05)。且EMMPRIN和MMP-9的表达呈显著正相关(r=0.378,P<0.01)。结论EMMPRIN和MMP-9表达均是反映人脑星形细胞瘤侵袭和预后的重要标记物,它们可能相互影响和共同调节星形细胞瘤的侵袭性生长。  相似文献   
77.
AIM: Renal tumor cell invasion is responsible for both local tissue destruction and distant metastasis. Invasion is largely mediated by matrix metalloproteases that are thought to be induced by tumor cell-derived extracellular matrix metalloprotease inducer (EMMPRIN) in surrounding fibroblasts. We hypothesized that EMMPRIN and matrix metalloproteinase-9 (MMP-9) are over-expressed in renal cell carcinoma. METHODS: Immunohistochemical analysis of EMMPRIN and MMP-9 was performed in tissue microarrays of 79 renal cell carcinomas including 12 cases of chromophobe renal cell carcinoma (ChRCC), 53 cases of clear cell renal cell carcinoma (CRCC), 8 cases of papillary renal cell carcinoma (PRCC), and 6 cases of carcinoma of the collecting ducts of Bellini (CoRCC). RESULTS: All renal cell carcinomas showed significant immunohistochemical expression of EMMPRIN. The EMMPRIN score in ChRCC (321+/-21) was significantly higher than in other histological subtypes of RCC (166+/-19 for CRCC; 276+/-24 for PRCC; 98+/-17 for CoRCC). MMP-9 was mainly expressed in tumor stromal cells and not in non-cancerous fibrovascular regions. The percent positive staining of MMP-9 at the invasive front of tumor cells was significantly higher in CRCC than in ChRCC, PRCC, or CoRCC. Higher EMMPRIN scores in CRCC were associated with shorter survival time, and correlated with higher T staging and nuclear grading. CONCLUSIONS: Our findings demonstrate for the first time that EMMPRIN is over-expressed in renal cell carcinomas. Increased expression of EMMPRIN in tumor cells is associated with poor prognosis of patients with CRCC.  相似文献   
78.
Tsai WC  Chao YC  Lee WH  Chen A  Sheu LF  Jin JS 《Histopathology》2006,49(4):388-395
AIMS: To examine the expression of extracellular matrix metalloprotease inducer (EMMPRIN) and matriptase in hepatocellular carcinoma (HCC) and to correlate this with tumour progression. METHODS AND RESULTS: Immunohistochemical analysis of EMMPRIN and matriptase was performed on tissue microarrays of 122 cases of HCC with various histological grades and/or clinical parameters. The expression of EMMPRIN and matriptase was undetectable in normal liver parenchyma of all eight control cases. However, among the 122 HCC cases, EMMPRIN and matriptase immunoreactivity was seen on the cell membrane and in the cytoplasm. The average immunostaining scores of EMMPRIN were 88 for grade I HCC, 195 for grade II HCC and 293 for grade III HCC. Of 85 HCC cases in 122 with detailed clinical TNM stages, the average immunostaining scores of EMMPRIN were 75 for stage T1, 177 for stage T2, 260 for stage T3 and 313 for stage T4 cases of HCC. In addition, the average immunostaining scores of matriptase were 84 for grade I HCC, 187 for grade II HCC, 302 for grade III HCC, and 72 for stage T1, 181 for stage T2, 224 for stage T3 and 284 for stage T4 cases of HCC. More advanced M and N stages of HCC were associated with higher intensity, greater percentages of tumour staining and immunostaining scores of EMMPRIN and matriptase. Higher EMMPRIN and matriptase immunostaining scores in HCCs also correlated significantly with tumour grading and TNM stages. CONCLUSIONS: Our findings demonstrate for the first time that EMMPRIN and matriptase are overexpressed in HCC. These may be novel biomarkers for the diagnosis and treatment of HCC.  相似文献   
79.
PROBLEM: Endometriosis is the presence of ectopic uterine endometrial tissue in the peritoneal cavity. Peritoneal fluid samples of women with endometriosis show elevated interleukin-1 (IL-1)beta, tumor necrosis factor (TNF)-alpha and transforming growth factor (TGF)-beta(1) levels, indicating that an altered immune system may play an important role in the pathogenesis of endometriosis. The invasion of ectopic endometrium into peritoneal mesothelium requires matrix metalloproteinases (MMPs) for tissue remodeling. Several MMPs are differentially expressed in human uterine endometrium with menstrual endometrium showing the highest level of expression. MMPs are stimulated by cytokines and also by the protein Extracellular Matrix Metalloproteinase Inducer (EMMPRIN). METHOD OF STUDY: To determine the role of cytokines in ectopic endometrial invasion, we investigated whether cytokines could regulate MMP production by endometrial fibroblast cells and whether this stimulation occurred through an effect on EMMPRIN expression. Human uterine fibroblasts (HUF) were treated with IL-1beta, TGF-beta(1) and TNF-alpha in a dose dependent and time dependent manner (C, 0.1, 1, 10 ng/mL IL-1beta or TGF-beta(1); C, 2, 10, 50 ng/mL TNF-alpha) for 0, 6, 12, and 24 hr. Cell conditioned medium samples were collected and concentrated at each timepoint for immunoblot analysis. Cellular RNA was collected for real time PCR analysis of MMPs-1, -2, -3 and EMMPRIN mRNA levels. RESULTS: Our results showed that IL-1beta stimulated MMP-1 protein secretion and mRNA levels in a time dependent manner (P < 0.05), MMP-2 mRNA in a time dependent manner and MMP-3 in a time and dose dependent manner. TNF-alpha stimulated MMP-1 and -3 protein secretion in a time dependent manner and stimulated MMP-1, -2 and -3 mRNA levels in a time dependent manner (P < 0.05). Neither IL-1beta nor TNF-alpha treatment affected MMP-2 protein secretion. TGF-beta(1) inhibited MMP-1 and MMP-2 mRNAs at the highest treatment dose after 24 hr but there was no effect on protein secretion. TGF-beta(1) exerted no effect on MMP-3 mRNA or protein secretion (P < 0.05). Neither of the cytokines affected EMMPRIN protein or mRNA levels but the 10 ng/mL TGF-beta(1) treatment did cause a reduction in EMMPRIN mRNA levels. CONCLUSIONS: These data show that elevated cytokines may play a role in the establishment of ectopic endometrium in the peritoneal cavity by stimulating MMPs to remodel the mesothelial lining of the peritoneum thus allowing for tissue invasion. The stimulation of MMPs by cytokines occurred without any change in EMMPRIN expression whereas the inhibitory effect of TGF-beta(1) involved a reduction in EMMPRIN mRNA levels.  相似文献   
80.
目的探讨白藜芦醇对细胞外基质金属蛋白酶诱导物(EMMPRIN)表达的影响。方法将人类单核细胞系THP-1和MCF-7细胞共培养,测定上清液中MMP-9活性。用PMA诱导THP-1为巨噬细胞,加入白藜芦醇,观察EMMPRIN表达和MMP-9活性变化。细胞共转染实验测定白藜芦醇对PPARγ的激动作用。用PPARγ的拮抗剂GW9662预处理细胞后,测定白藜芦醇对EMMPRIN表达的影响。结果PMA诱导使单核细胞EMMPRIN表达明显增强,与EMMPRIN高表达的MCF-7细胞共培养显著增加单核细胞表达MMP-9。白藜芦醇显著抑制EMMPRIN和MMP-9生成。白藜芦醇明显激动PPARγ,GW9662大幅减弱白藜芦醇对EMMPRIN和MMP-9的作用。结论单核细胞向巨噬细胞分化过程中表达明显增强的EMMPRIN可能是促进MMPs表达的主要因子。白藜芦醇通过激动PPARγ抑制EMMPRIN的表达,可能是其抑制巨噬细胞MMPs产生的机制。  相似文献   
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