Objective： To investigate the synergistic anti-inflammatory effect of Radix Platycodon in combination with herbs for cleaning-heat and detoxification and its mechanism for Fei （肺）-targeting. Methods： Forty Wistar...Objective： To investigate the synergistic anti-inflammatory effect of Radix Platycodon in combination with herbs for cleaning-heat and detoxification and its mechanism for Fei （肺）-targeting. Methods： Forty Wistar rats were randomly divided into five groups （8 per group）： the sham-operated group, model group, Radix P/atycodon group, Flos Lonicera and Fructus Forsythia （LF） group, and Radix Platycodon, Flos Lonicera and Fructus Forsythia combination （PLF） group, using a random number table. A rat chronic obstructive pulmonary disease （COPD） model was established by passive smoking and intratracheal instillation of lipopolysaccharide （LPS）. The treatments started from the 15th day of passive smoking for a total duration of 14 days. At the end of the treatment, changes in the following measurements were determined： lung histopathology, inflammatory cytokines including tumor necrosis factor α （TNF- α）, transforming growth factor 13 （TGF- 13 ） and interleukin IL-1 13 （IL-1 13 ） in bronchoalveolar lavage fluid （BALF）, and mRNA expression of endogenous active substance intestinal trefoil factor 3 （TFF3） in the lung tissue. Results： Light microscopy showed that compared with the sham-operated group, rats in the COPD model group had disrupted alveolar structure, collapsed local alveoli, significantly widened or even fused alveolar septa, and massive infiltration of inflammatory cells in the alveolar wall and interstitium. In addition, significant bronchial epithelium hyperplasia, partially shed epithelia, and marked inflammatory cell infiltration in the bronchial wall and its surrounding tissues were noticed. Electron microscopy showed that rats in the model group had degeneration of alveolar type Ⅱ epithelial cell; reduction, breakage or even loss of cell surface microvilli; swollen mitochondria with disappearing cristae and vacuole-like structure; and, increased secondary lysosomes in alveolar macrophages. The TNF- α, TGF- β and IL-β levels and white blood ce展开更多
目的:研究肠三叶因子(intestinal trefoil factor,ITF)对自身启动子活性的影响及Janus激酶/信号转导和转录激活因子(Janus kinase/signal transducers and activators of transcription,JAK/STAT)信号通路对其的调控作用。方法:以人全...目的:研究肠三叶因子(intestinal trefoil factor,ITF)对自身启动子活性的影响及Janus激酶/信号转导和转录激活因子(Janus kinase/signal transducers and activators of transcription,JAK/STAT)信号通路对其的调控作用。方法:以人全血基因组DNA为模板,PCR获取ITF基因5'侧翼序列,插入p GL3-Basic载体,构建ITF启动子重组载体;以不同浓度的ITF刺激,检测双荧光素酶的活性;运用JAK-STAT3通路特异性抑制剂AG490阻断JAKSTAT3信号通路,观察AG490对ITF启动子活性的影响。结果:酶切和直接测序法证实包含ITF启动子的重组质粒构建成功;瞬时转染实验显示,ITF能显著提高ITF启动子的活性(P<0.05);加入AG490后ITF启动子活性显著下降(P<0.05)。结论:ITF通过JAK-STAT3途径上调自身启动子的活性。展开更多
基金Supported by the National Basic Research Program of China (973 Program,No.2009CB522704)the National Natural Science Foundation of China(No.30672676)
文摘Objective： To investigate the synergistic anti-inflammatory effect of Radix Platycodon in combination with herbs for cleaning-heat and detoxification and its mechanism for Fei （肺）-targeting. Methods： Forty Wistar rats were randomly divided into five groups （8 per group）： the sham-operated group, model group, Radix P/atycodon group, Flos Lonicera and Fructus Forsythia （LF） group, and Radix Platycodon, Flos Lonicera and Fructus Forsythia combination （PLF） group, using a random number table. A rat chronic obstructive pulmonary disease （COPD） model was established by passive smoking and intratracheal instillation of lipopolysaccharide （LPS）. The treatments started from the 15th day of passive smoking for a total duration of 14 days. At the end of the treatment, changes in the following measurements were determined： lung histopathology, inflammatory cytokines including tumor necrosis factor α （TNF- α）, transforming growth factor 13 （TGF- 13 ） and interleukin IL-1 13 （IL-1 13 ） in bronchoalveolar lavage fluid （BALF）, and mRNA expression of endogenous active substance intestinal trefoil factor 3 （TFF3） in the lung tissue. Results： Light microscopy showed that compared with the sham-operated group, rats in the COPD model group had disrupted alveolar structure, collapsed local alveoli, significantly widened or even fused alveolar septa, and massive infiltration of inflammatory cells in the alveolar wall and interstitium. In addition, significant bronchial epithelium hyperplasia, partially shed epithelia, and marked inflammatory cell infiltration in the bronchial wall and its surrounding tissues were noticed. Electron microscopy showed that rats in the model group had degeneration of alveolar type Ⅱ epithelial cell; reduction, breakage or even loss of cell surface microvilli; swollen mitochondria with disappearing cristae and vacuole-like structure; and, increased secondary lysosomes in alveolar macrophages. The TNF- α, TGF- β and IL-β levels and white blood ce
文摘目的:研究肠三叶因子(intestinal trefoil factor,ITF)对自身启动子活性的影响及Janus激酶/信号转导和转录激活因子(Janus kinase/signal transducers and activators of transcription,JAK/STAT)信号通路对其的调控作用。方法:以人全血基因组DNA为模板,PCR获取ITF基因5'侧翼序列,插入p GL3-Basic载体,构建ITF启动子重组载体;以不同浓度的ITF刺激,检测双荧光素酶的活性;运用JAK-STAT3通路特异性抑制剂AG490阻断JAKSTAT3信号通路,观察AG490对ITF启动子活性的影响。结果:酶切和直接测序法证实包含ITF启动子的重组质粒构建成功;瞬时转染实验显示,ITF能显著提高ITF启动子的活性(P<0.05);加入AG490后ITF启动子活性显著下降(P<0.05)。结论:ITF通过JAK-STAT3途径上调自身启动子的活性。
