排序方式: 共有48条查询结果,搜索用时 15 毫秒
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突触损伤在血管性认知障碍(vascular cognitive impairment, VCT)发病的早期即存在,与认知功能障碍关系密切,其具体机制尚不明确.研究突触形态结构的可塑性、突触传递效能的可塑性以及突触蛋白在VCI发病中的作用和机制,有助于进一步阐明VCI的发病机制,从而更有效地防治VCI. 相似文献
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突触损伤在血管性认知障碍(vascular cognitive impairment, VCT)发病的早期即存在,与认知功能障碍关系密切,其具体机制尚不明确.研究突触形态结构的可塑性、突触传递效能的可塑性以及突触蛋白在VCI发病中的作用和机制,有助于进一步阐明VCI的发病机制,从而更有效地防治VCI. 相似文献
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Objective To investigate the effects of Pseudomonas aeruginosa vaccine (PA) on proliferation and invasiveness of the hepatocellular carcinoma cell line MHCC97L with metastatic potential. Methods Proliferation, growth curve, plate efficiency, flow cytometry, transwell invasion assay, cell motility assay, scarification test, vascular endothelial growth factor (VEGF) and matrix metalloproteinase-2 (MMP2) protein activity were evaluated after cells were treated with PA at various concentrations. Results PA can inhibit the proliferation and plate efficiency of MHCC97L cell markedly in a dose-dependent manner. The IC50 of cells treated with PA for 48 h and 72 h was 3.1 ×108/ml and 1.9 × 108/ml, respectively. The doubling time increased and plate efficiency decreased gradually when cells treated with 0.5 × 108/ml, 1 × 108/ml and 2 × 108/ml PA (P<0.01). PA could induce cell cycle arrest at the G1 phase in a dose-dependent manner by flow cytometric analysis. The average amount of invading cell per field in cell invasion assay and motility assay were 4. 8 ± 1.3 and 8. 8±2.2 when cells treated with 1× 108/ml PA, which was significantly lower than that of control group (8. 6±2. 1 and 15. 6±1.2 ) (P<0.01) Scarification test showed that the metastatic ability of cells treated with 1 × 108/ml PA significantly lower than that in the control group. Comparison between cells treated with 1 × 108/ml PA and control group, no remarkable difference was found regarding expression of VEGF and MMP2 in supernatant of cell culture. Conclusion PA can inhibit proliferation and plate efficiency of HCC cell line MHCC97L, which is in part mediated by the cell cycle arrest at the G1 phase. PA could inhibit invasiveness of HCC cell line MHCC97L, which is unrelated to the VEGF and MMP2 protein activity. 相似文献
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突触损伤在血管性认知障碍(vascular cognitive impairment, VCT)发病的早期即存在,与认知功能障碍关系密切,其具体机制尚不明确.研究突触形态结构的可塑性、突触传递效能的可塑性以及突触蛋白在VCI发病中的作用和机制,有助于进一步阐明VCI的发病机制,从而更有效地防治VCI. 相似文献
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突触损伤在血管性认知障碍(vascular cognitive impairment, VCT)发病的早期即存在,与认知功能障碍关系密切,其具体机制尚不明确.研究突触形态结构的可塑性、突触传递效能的可塑性以及突触蛋白在VCI发病中的作用和机制,有助于进一步阐明VCI的发病机制,从而更有效地防治VCI. 相似文献
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目的探讨新型标记笔术前标记下肢曲张静脉的应用价值。方法应用一种新型静脉曲张标记笔,与传统棉签标记法比较,评估其成本、实用性及标记差异对手术效果的影响。结果2组耗材成本的对比结果显示。标记笔与棉签每次标记成本分别为0.18元和0.36元,标记笔成本低廉。组间医患满意率评分结果、术中穿刺成功率及标记精确性存在显著差异(P〈0.05),标记笔在易用性、精确性、满意度等方面较棉签具有明显优势,差异有统计学意义(P〈0.05)。术后随访复发、遗漏资料显示,术后1周2组差异无统计学意义(P〉0.05),术后6个月和1年,棉签标记组复发率、遗漏率均较新型标记笔标记组高,且差异有统计学意义(P〈0.05)。结论新型静脉曲张标记笔成本低、应用:方便、标记精确性高,与传统方法比较,降低了术中遗漏和术后复发率,具有较好的临床应用价值。 相似文献
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目的:研究中药复方松友饮对姑息性肝切除裸鼠模型中残癌生长及转移的影响。方法:以人肝癌细胞(MHCC97H)建立裸鼠移植瘤姑息性肝切除模型,36只裸鼠随机分成对照组和松友饮组,每天1次灌胃给药连续5周,每周测体质量。给药结束后第2d每组处死6只裸鼠观察肿瘤大小、肺转移等;并检测残癌中白细胞介素-1β(IL-1β)和增殖细胞核抗原(PCNA)表达情况。剩余裸鼠用于观察生存期。结果:松友饮组与对照组残癌体积为(724.9±337.6)mm3和(1205.2±581.3)mm3(P<0.05),抑瘤率为39.9%;肺转移分级下降(P<0.05)。前者体质量大于对照组(P<0.001),生存期延长率为22.7%;IL-1βmRNA表达水平显著下调(P<0.001),蛋白水平为(18.0±5.1)pg/mL和(27.9±4.5)pg/mL(P<0.01);PCNA指数为(75.2±8.5)%和(86.1±4.8)%(P<0.001)。结论:松友饮灌胃给药下调残癌表达IL-1β和PCNA,抑制残癌生长、转移,对肝癌病人有潜在的应用价值。 相似文献
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目的:研究联用中药"松友饮"和干扰素α(IFN-α)对高转移人肝癌裸鼠原位模型肿瘤生长、转移和生存期的影响。方法:以人高转移MHCC97H细胞建立裸鼠原位移植瘤模型,48只成模裸鼠随机分成对照组、"松友饮"组、IFN-α组及"松友饮"+IFN-α组,肝脏接种肿瘤24h开始每天1次灌胃给药及皮下注射,连续5周。第35天每组随机处死6只裸鼠,计算肿瘤体积及转移情况;剩余成瘤裸鼠用于观察生存期。结果:"松友饮"组、IFN-α组及"松友饮"+IFN-α组肿瘤体积、肺转移结节数及生存期与对照组比较,均有显著差异(P<0.05)。结论:连续5周联用"松友饮"显著增强IFNα对HCC裸鼠模型肿瘤生长、转移的抑制作用并延长生存期,对HCC病人有潜在的应用价值。 相似文献