The invasion of Staphylococcus aureus into respiratory epithelial cells and the followed inflammatory responses cause serious tissue damage.The aim of this study was to investigate the effects of ginsenoside Rg_1(Rg_...The invasion of Staphylococcus aureus into respiratory epithelial cells and the followed inflammatory responses cause serious tissue damage.The aim of this study was to investigate the effects of ginsenoside Rg_1(Rg_1)on S.aureus infection in vitro and its action mechanism.An internalization model was constructed to determine the effect of Rg_1 on S.aureus invasion. The changes of expression of integrinβ1,NF-κB and glucocorticoid receptor were analyzed by Western blot.Expression of pro-inflammatory genes was validated using RT-PCR.The results demonstrated that Rg_1 treatment could reduce the invasion of S.aureus into rat pulmonary epithelial cells by down-regulating integrinβ1.Its anti-inflammatory action was exerted through reducing NF-κB and expressions of intercellular adhesion molecule-1(ICAM-1),tumor necrosis factor-α(TNF-α),interleukin-2 (IL-2)and interleukin-6(IL-6).The increased expression of glucocorticoid receptor was involved in this regulation.The results suggested that Rg_1 could play a positive role in reducing S.aureus infections.Rg_1 could be used for the treatment of S.aureus infection,potentially.展开更多
目的:子宫平滑肌内存在多种5-HT受体,5-HT通过作用于5-HT受体实现其对子宫收缩活性的影响。本研究探讨巴西苏木红素对5-HT受体的作用及其特点。方法:小鼠分离子宫平滑肌条,采用受体拮抗实验和real time PCR方法,对巴西苏木红素的5-HT受...目的:子宫平滑肌内存在多种5-HT受体,5-HT通过作用于5-HT受体实现其对子宫收缩活性的影响。本研究探讨巴西苏木红素对5-HT受体的作用及其特点。方法:小鼠分离子宫平滑肌条,采用受体拮抗实验和real time PCR方法,对巴西苏木红素的5-HT受体的抑制作用进行研究。结果:巴西苏木红素虽然对正常子宫平滑肌的收缩幅度和频率无影响,但能明显抑制5-HT2受体激动剂马来酸麦角新碱的收缩活性,其pA2为5.71±0.21。而5-HT亚型的选择性激动剂舒马普坦(5-HT1D)、AL34662(5-HT2A)、MCPP(5-HT2C)的收缩子宫活性同样能够被巴西苏木红素抑制,pA2分别为4.58±0.06;4.91±0.15;5.38±0.15。巴西苏木红素明显抑制了5-HT受体1D和2C亚型mRNA的表达。结论:巴西苏木红素能够阻滞小鼠子宫5-HT受体,并通过可能影响5-HT受体所介导的子宫功能。展开更多
The aims of the present study are to investigate the effect of vasoconstriction and to explore the mechanism of rutae- carpine. The research findings showed that rutaecarpine could induce contractions of the rat thora...The aims of the present study are to investigate the effect of vasoconstriction and to explore the mechanism of rutae- carpine. The research findings showed that rutaecarpine could induce contractions of the rat thoracic aorta in vitro. The inhibitors of Rho-kinase and inositol 1,4,5-triphosphate receptor (IP 3 R) could suppress the effect of rutaecarpine-induced vasoconstriction. In the study of A7r5 cells (a line of smooth muscle cells), 300 μg/L rutaecarpine promoted the concentration of intracellular Ca 2+ and enhanced the IP 3 R expression, which connects with 1,4,5-triphosphate to evoke the release of Ca 2+ from the intracellular stores. Rutaecarpine increased the RhoA mRNA expression when the cells were pretreated with inhibitor H-1152, and improved the levels of phosphorylation of myosin light chain phosphatase (MLCP) and myosin light chain (MLC). These results suggest that rutaecarpine plays a role in vasoconstriction relative to the RhoA/MLCP-MLC signaling pathway, which denotes a new field of rutaecarpine in pharmacology.展开更多
基金supported partly by the National Natural Science Foundation of China(Nos.30801523,30973896,and81073092)the National Key New Drug R&D Program for the 12th Five-year Plan of China(Nos.2011ZX09101-002-11,2012ZX09103-201041,and2012ZX09102-201-008)the Drug Safety Evaluation Project for the 11th Five-year Plan of China(No.2006BAI14B01)~~
基金National Natural Science Foundation of China (Grant No.30973896,30801523 and 81073092)the National S&T Major Special Project for New Drug R&D of China(Grant No. 2009ZX09103 -301,2009ZX09502 and 2011ZX09101-002-11 )
文摘The invasion of Staphylococcus aureus into respiratory epithelial cells and the followed inflammatory responses cause serious tissue damage.The aim of this study was to investigate the effects of ginsenoside Rg_1(Rg_1)on S.aureus infection in vitro and its action mechanism.An internalization model was constructed to determine the effect of Rg_1 on S.aureus invasion. The changes of expression of integrinβ1,NF-κB and glucocorticoid receptor were analyzed by Western blot.Expression of pro-inflammatory genes was validated using RT-PCR.The results demonstrated that Rg_1 treatment could reduce the invasion of S.aureus into rat pulmonary epithelial cells by down-regulating integrinβ1.Its anti-inflammatory action was exerted through reducing NF-κB and expressions of intercellular adhesion molecule-1(ICAM-1),tumor necrosis factor-α(TNF-α),interleukin-2 (IL-2)and interleukin-6(IL-6).The increased expression of glucocorticoid receptor was involved in this regulation.The results suggested that Rg_1 could play a positive role in reducing S.aureus infections.Rg_1 could be used for the treatment of S.aureus infection,potentially.
基金supported by the National S&T Major Special Project for New Drug R&D of China (Nos. 2009ZX09103-301, 2009ZX09502-021 and 2011ZX09101-002-11)the National Natural Science Foundation of China (Nos. 30973896,30801523 and 81073092)+1 种基金the Scientific Foundation for China Postdoctoral fellows (No. 20080440418)the Special Foundation for Laboratory of Tsinghua University (No. LF 20103579)~~
文摘目的:子宫平滑肌内存在多种5-HT受体,5-HT通过作用于5-HT受体实现其对子宫收缩活性的影响。本研究探讨巴西苏木红素对5-HT受体的作用及其特点。方法:小鼠分离子宫平滑肌条,采用受体拮抗实验和real time PCR方法,对巴西苏木红素的5-HT受体的抑制作用进行研究。结果:巴西苏木红素虽然对正常子宫平滑肌的收缩幅度和频率无影响,但能明显抑制5-HT2受体激动剂马来酸麦角新碱的收缩活性,其pA2为5.71±0.21。而5-HT亚型的选择性激动剂舒马普坦(5-HT1D)、AL34662(5-HT2A)、MCPP(5-HT2C)的收缩子宫活性同样能够被巴西苏木红素抑制,pA2分别为4.58±0.06;4.91±0.15;5.38±0.15。巴西苏木红素明显抑制了5-HT受体1D和2C亚型mRNA的表达。结论:巴西苏木红素能够阻滞小鼠子宫5-HT受体,并通过可能影响5-HT受体所介导的子宫功能。
基金National Natural Science Foundation of China (Grant No.30801523,30973896,and 81073092)the Projects of Science Research for the 11th Five-Year Plan of the Ministry of Science and Technology of China (Grant No.2006BAI08B03-09)+1 种基金the China's Post-Doctoral Science Fund (Grant No.20080440418)the National S&T Major Special Project for New Drug R&D of China (Grant No.2012ZX09102-201-008,2012ZX09103-201-041and2011ZX09101-002-11)
文摘The aims of the present study are to investigate the effect of vasoconstriction and to explore the mechanism of rutae- carpine. The research findings showed that rutaecarpine could induce contractions of the rat thoracic aorta in vitro. The inhibitors of Rho-kinase and inositol 1,4,5-triphosphate receptor (IP 3 R) could suppress the effect of rutaecarpine-induced vasoconstriction. In the study of A7r5 cells (a line of smooth muscle cells), 300 μg/L rutaecarpine promoted the concentration of intracellular Ca 2+ and enhanced the IP 3 R expression, which connects with 1,4,5-triphosphate to evoke the release of Ca 2+ from the intracellular stores. Rutaecarpine increased the RhoA mRNA expression when the cells were pretreated with inhibitor H-1152, and improved the levels of phosphorylation of myosin light chain phosphatase (MLCP) and myosin light chain (MLC). These results suggest that rutaecarpine plays a role in vasoconstriction relative to the RhoA/MLCP-MLC signaling pathway, which denotes a new field of rutaecarpine in pharmacology.