5 research outputs found

    Effects of Jiangu Granules on the proliferation of osteoblasts through G_1/S phase cell-cycle regulated proteins

    Get PDF
    目的观察健骨颗粒对成骨细胞G_1/S期调控的影响,探讨健骨颗粒促进成骨细胞增殖的作用机制。方法制备健骨颗粒血清组、模型血清组和雌二醇血清组。采用酶消化法培养SD大鼠成骨细胞,健骨颗粒含药血清干预,以模型血清和雌二醇血清为对照。运用流式细胞术检测成骨细胞增殖周期,荧光定量PCR法检测成骨细胞G_1/S期调控蛋白Cyclin E、CDK2、p21和转录因子E2F-1 m RNA的表达。结果 15%的雌二醇血清与健骨颗粒血清干预48 h,成骨细胞增殖速度均明显快于模型血清组(P<0.01);G_0/G_1期成骨细胞比例明显降低(P<0.01),S期、G_2/M期细胞比例及增殖指数则明显高于模型血清组(P<0.01);与模型血清组比较,雌二醇血清组与健骨颗粒血清组能提高成骨细胞Cyclin E、CDK2及转录因子E2F-1 m RNA的表达(P<0.01),而降低p21的表达(P<0.01)。结论健骨颗粒通过调节成骨细胞G_1/S期调控机制,推进成骨细胞顺利通过G_1/S检测点,促进成骨细胞增殖。Objective To observe the effects of Jiangu Granules on the G_1/S phase cell-cycle regulated proteins of osteoblasts, so as to reveal the mechanism of Jiangu Granules in promoting osteoblasts proliferation. Methods The Jiangu Granules-serum group, model-serum group and estradiol-serum group were prepared. Osteoblasts of SD rats were cultivated by enzymatic digestion and intervened with Jiangu Granules-serum, model-serum and estradiol-serum(as control) respectively. The cell cycles were analyzed by flow cytometry, while the fluorescence quantitative PCR was applied to measure cyclin E, CDK2, p21 and E2F-1 m RNA. Results The cell proliferation rates of osteoblasts intervened with estradiol serum and Jiangu Granules-serum for 48 hours were faster than that with the same concentration model-serum(P < 0.01). Compared with the model-serum group, the proportion of osteoblasts in the G_0/G_1 phase were significantly reduced after intervention with 15% of estradiol serum and Jiangu Granules-serum for 48 hours(P < 0.01),while the proportion of cells in S phase, G_2/M phase and proliferation index was much higher(P < 0.01). The expression of cycling E, CDK 2 and transcription factor E2F-1 m RNA of osteoblasts in the Jiangu Granules-serum group and the estradiol-serum group was higher than that of model-serum group(P < 0.01), while the expression of p21 m RNA was lower than the model-serum group(P < 0.01). Conclusion Jiangu Granules-serum can adjust the G_1/S phase cellcycle regulated mechanism in osteoblast, so as to push the cells passing G_1/S checkpoint and accelerate the proliferation of osteoblast.国家自然科学基金资助项目(81473706

    准噶尔盆地南缘水资源合理配置及高效利用技术研究

    No full text
    一、任务来源: 国家科技支撑计划项目“准噶尔盆地南缘水资源合理配置及高效利用技术研究”,课题编号为2007BAC17B02。 二、技术原理及性能指标: 本项目成果主要应用于水资源领域;技术原理为通过对准噶尔盆地南缘水资源总量及变化趋势的研究,分析评价水资源开发潜力;研究准噶尔盆地南缘自然植被和绿洲防护林的生态需水量,对区域自然植被保育和人工植被建植进行水分调控;开发利用区域非常规水资源,提出非常规水资源安全性评价指标,提出非常规水资源高效利用技术规程;确定准噶尔盆地南缘重要区域中天然水循环通量和人工水循环通量的基本比例,对区域水资源进行合理配置,实现水资源开发利用..

    新亚欧大陆桥新疆段环境灾害与防治对策研究

    No full text
    该项目研究以新的理论、方法和现代技术体系为支撑,从时间序列、空间结构、动态过程、耦合关系等多维角度入手,对陆桥新疆段环境灾害形成相关性、灾害过程的独特性、灾害分布的区域性、灾害发生的时间性以及灾害治理的综合性等进行全面、系统、多层次的深入分析,采取定性与定量相结合、以定量为主的灾害评价,探讨其动态变化过程及发展变化趋势,建立灾害评价预报模型。运用GIS,建立减灾管理系统,把重要的灾害类型按空间加以综合,分析灾害的强度和频度;运用系统分析方法,研究致灾因子间相互影响、相互作用及耦合关系;结合分形理论分析灾害空间分布的不均匀性及其变化规律,识别和揭示灾害过程的内部特征;运用模糊识别理论和灰色理论进..

    中国高等植物受威胁物种名录

    No full text
    2008年,环境保护部和中国科学院联合启动了《中国生物多样性红色名录——高等植物卷》的编制工作。通过这项工作,我们依据IUCN濒危物种红色名录标准对中国野生高等植物的濒危状况进行了全面评估,编制了中国高等植物红色名录。2013年9月,该名录以环境保护部、中国科学院第54号公告形式发布,即《中国生物多样性红色名录—
    corecore