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Objective To investigate the effect of rosiglitazone on p38 mitogen-activated protein kinase (p38MAPK) pathway in polycystic kidney cyst-lining epithelial cells. Methods The cyst-lining epithelial cells (PKD cells) from human polycystic kidney were treated with rosiglitazone (10 μmol/L), peroxisome proliferator-activated receptor-γ (PPARγ) inhibitor GW9662 (10 μmol/L), rosiglitazone (10 μmol/L) +GW9662 (10 μmol/L), p38MAPK specific inhibitor SB203580 (10 μmol/L), SB203580 (10 μmol/L)+ rosiglitazone(10 μmol/L) for 2 hours followed by epidermal growth factor (EGF) stimulation. Protein expressions of p38, phuspho-p38 (p-p38) and proliferating cell nuclear antigen (PCNA) were detected by Western blot. p38 mRNA was examined by RT-PCR. Expression of c-fos and c-jun was observed by immunocytochemistry. Results (1) EGF markedly up-regulated the expressions of p38, p-p38, PCNA, c-fos anti c-jun compared with control group (P<0.01). (2) Compared with EGF treated group, rosiglitazone significantly reduced p38 activation and mRNA expression (P<0.01, respectively). Rosiglitazone, rosiglitazone+SB203580 could significantly down-regulated p-p38, PCNA, c-fos and c-jun expression (P<0.01, respectively) with no significant difference between these two groups. (3) GW9662 partially reversed the reduction effect of rosiglitazone. Conclusions Rosiglitazone can inhibit proliferation of autosomal dominant polycystic kidney disease cyst-lining epithelial cells partially through down-regulating p38 activation and reducing c-fos, c-jun and PCNA expression. The above effect of rosiglitazone is in part PPARγ-independcnt. 相似文献
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目的 研究2型糖尿病KK-Ay小鼠糖尿病肾病(DN)的特点和应用价值.方法 选择雄性KK-Ay小鼠和C57BL/6J小鼠各30只,每两周代谢笼收集24 h尿液及随意尿测尿微量白蛋白,眶后静脉丛采血测空腹血胰岛素、糖化血红蛋白、血糖、胆固醇、甘油三酯、尿素氮、肌酐、白蛋白.8、12、20周龄时两组分别处死10只小鼠取肾脏行病理检查.结果 不同周龄KK-Ar小鼠尿微量白蛋白、血胰岛素、糖化血红蛋白、血糖、胆固醇、甘油三酯均比同周龄C57BL/6J小鼠高(P<O.05),且随周龄增加而进展,8周龄表现为典型2型糖尿病,12周龄进入早期DN,20周龄肾脏病理表现为特征性DN改变,但未见肾功能下降.结论 KK-Ay小鼠是研究DN早期病变的理想模型. 相似文献
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Objective To investigate the effect of rosiglitazone on p38 mitogen-activated protein kinase (p38MAPK) pathway in polycystic kidney cyst-lining epithelial cells. Methods The cyst-lining epithelial cells (PKD cells) from human polycystic kidney were treated with rosiglitazone (10 μmol/L), peroxisome proliferator-activated receptor-γ (PPARγ) inhibitor GW9662 (10 μmol/L), rosiglitazone (10 μmol/L) +GW9662 (10 μmol/L), p38MAPK specific inhibitor SB203580 (10 μmol/L), SB203580 (10 μmol/L)+ rosiglitazone(10 μmol/L) for 2 hours followed by epidermal growth factor (EGF) stimulation. Protein expressions of p38, phuspho-p38 (p-p38) and proliferating cell nuclear antigen (PCNA) were detected by Western blot. p38 mRNA was examined by RT-PCR. Expression of c-fos and c-jun was observed by immunocytochemistry. Results (1) EGF markedly up-regulated the expressions of p38, p-p38, PCNA, c-fos anti c-jun compared with control group (P<0.01). (2) Compared with EGF treated group, rosiglitazone significantly reduced p38 activation and mRNA expression (P<0.01, respectively). Rosiglitazone, rosiglitazone+SB203580 could significantly down-regulated p-p38, PCNA, c-fos and c-jun expression (P<0.01, respectively) with no significant difference between these two groups. (3) GW9662 partially reversed the reduction effect of rosiglitazone. Conclusions Rosiglitazone can inhibit proliferation of autosomal dominant polycystic kidney disease cyst-lining epithelial cells partially through down-regulating p38 activation and reducing c-fos, c-jun and PCNA expression. The above effect of rosiglitazone is in part PPARγ-independcnt. 相似文献
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Objective To investigate the effect of rosiglitazone on p38 mitogen-activated protein kinase (p38MAPK) pathway in polycystic kidney cyst-lining epithelial cells. Methods The cyst-lining epithelial cells (PKD cells) from human polycystic kidney were treated with rosiglitazone (10 μmol/L), peroxisome proliferator-activated receptor-γ (PPARγ) inhibitor GW9662 (10 μmol/L), rosiglitazone (10 μmol/L) +GW9662 (10 μmol/L), p38MAPK specific inhibitor SB203580 (10 μmol/L), SB203580 (10 μmol/L)+ rosiglitazone(10 μmol/L) for 2 hours followed by epidermal growth factor (EGF) stimulation. Protein expressions of p38, phuspho-p38 (p-p38) and proliferating cell nuclear antigen (PCNA) were detected by Western blot. p38 mRNA was examined by RT-PCR. Expression of c-fos and c-jun was observed by immunocytochemistry. Results (1) EGF markedly up-regulated the expressions of p38, p-p38, PCNA, c-fos anti c-jun compared with control group (P<0.01). (2) Compared with EGF treated group, rosiglitazone significantly reduced p38 activation and mRNA expression (P<0.01, respectively). Rosiglitazone, rosiglitazone+SB203580 could significantly down-regulated p-p38, PCNA, c-fos and c-jun expression (P<0.01, respectively) with no significant difference between these two groups. (3) GW9662 partially reversed the reduction effect of rosiglitazone. Conclusions Rosiglitazone can inhibit proliferation of autosomal dominant polycystic kidney disease cyst-lining epithelial cells partially through down-regulating p38 activation and reducing c-fos, c-jun and PCNA expression. The above effect of rosiglitazone is in part PPARγ-independcnt. 相似文献
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睾丸是机体对镉毒性最敏感的器官之一。低剂量的急性镉中毒即可引起睾丸出血、生精过程短时间破坏,而敏感机理一直未能阐明。有报道认为,尽管有免疫组化实验阳性结果的支持,睾丸内无法诱导产生对镉的解毒起重要作用的金属硫蛋白(Metallothionein,MT)很可能是睾丸对镉敏感的原因。本实验通过分离、纯化经镉诱导的大鼠睾丸内小分子镉结合蛋白,与肝MT相比较,以探究两者的差异,为从细胞保护机制的角度阐明睾丸对镉敏感的机理提供依据。目的:纯化经CdCl2诱导雄性SD大鼠的睾丸小分子镉结合蛋白(CdBP)与… 相似文献
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目的 观察过氧化物酶增殖物激活受体γ(PPARγ)在大鼠肾脏衰老过程中的表达分布,探讨其可能作用机制.方法 分别以3月龄、12月龄和24月龄SD大鼠为模型,采用Western印迹、免疫组化、原位杂交的方法检测PPARγ蛋白、核酸在不同年龄大鼠肾组织中的表达.结果 PPARγ蛋白在肾组织表达,3月龄大鼠为0.94±0.05,明显高于24月龄大鼠0.78±0.02(t=7.08,P<0.01),亦高于12月龄大鼠0.87±0.04,但差异无统计学意义(t=2.49,P>0.05).免疫组化结果显示,PPARγ蛋白在各年龄组大鼠肾小管、集合管上皮细胞中均有分布,主要分布于细胞核内,在老年大鼠肾小球系膜细胞及壁层上皮细胞内也有阳性染色.原位杂交结果显示,PPARγ mRNA的表达分布与免疫组化结果一致.半定量分析显示,在大鼠肾组织的衰老过程中,PPARγ基因表达呈下降趋势.结论 PPARγ作为核转录因子参与了大鼠肾脏衰老过程调控. 相似文献
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胱抑素C在缺血/再灌注急性肾损伤大鼠尿液中的变化及意义 总被引:1,自引:0,他引:1
目的:检测肾缺血/再灌注大鼠尿液胱抑素C含量,探讨其在缺血/再灌注急性肾损伤早期评估中的作用。方法:选取雄性SD大鼠,随机分为4组,建立缺血/再灌注急性肾损伤动物模型,缺血时间4组分别为0、10、20、30min,测定各组大鼠术前及再灌注24h后尿液胱抑素C,血清肌酐(Scr)、尿素氮(BUN)浓度,计算24h肌酐清除率(Ccr),取各组再灌注24h后肾组织作组织学检查,行肾小管坏死半定量评分。结果:各组大鼠基线肾功能差异无统计学意义,再灌注24h后与基线值相比,肾缺血0min组及10min组BUN、Scr及Ccr无显著改变;肾缺血20min组BUN、Scr无显著改变,但Ccr显著降低;肾缺血30min组BUN[(45.3±14.6)vs(13.8±1.6)mmol/L]、Scr[(160.8±22.2)vs(36.9±7.9)μmol/L]显著升高,Ccr显著降低[(1.87±0.3)vs(0.56±0.1)ml/min]。20min组及30min组肾小管坏死评分与0min组相比显著升高。再灌注24h后与基线值相比,肾缺血0min组尿液胱抑素C水平无显著改变,肾缺血10min[(0.79±0.11)vs(0.25±0.02)μg/L]、20min[(1.23±0.35)vs(0.30±0.05)μg/L]及30min组[(1.33±0.51)vs(0.28±0.03)μg/L]尿液胱抑素C水平显著升高。结论:尿液胱抑素C测定可望成为缺血/再灌注急性肾损伤的早期诊断标记物。 相似文献