本文旨在观察血管紧张素II (angiotensin II, Ang II)对血管平滑肌细胞核转录因子-κB (nuclear factor-κB, NF-κB)的活性及骨形成蛋白-2 (bone morphogenetic protein-2, BMP-2)表达的影响,以探讨Ang II参与动脉粥样硬化的机制,并探...本文旨在观察血管紧张素II (angiotensin II, Ang II)对血管平滑肌细胞核转录因子-κB (nuclear factor-κB, NF-κB)的活性及骨形成蛋白-2 (bone morphogenetic protein-2, BMP-2)表达的影响,以探讨Ang II参与动脉粥样硬化的机制,并探讨川芎嗪是否能抑制Ang II的促动脉粥样硬化作用。采用Western blot、免疫组化和原位杂交等方法分别检测Ang II刺激和川芎嗪干预后NF-κB活性、BMP-2 蛋白和 mRNA 表达的变化。结果显示:(1) Ang II 刺激激活 NF-κB。Ang II 刺激 15 min 即有 NF-κB p65核转移,30 min 达高峰(P<0.01),1 h 后减退。川芎嗪抑制 Ang II诱导的NF-κB激活,与Ang II组比较,川芎嗪 + Ang II组NF-κB活性显著降低 (P<0.01)。 (2) Ang II 刺激 6 h 时 BMP-2 表达增强(P<0.05),12 h 时减弱(P<0.01),24 h 时更弱(P<0.01)。川芎嗪 + Ang II组中,川芎嗪干预6 h 时BMP-2 表达亦增强,12 与24 h 时保持正常水平。 (3) 川芎嗪对正常细胞的NF-κB活性和BMP-2 表达无影响。以上结果表明,Ang II刺激后激活NF-κB并最终使生长抑制因子BMP-2 表达下降,这可能是其参与动脉粥样硬化发生的机制之一。BMP-2 一过性增高可能不依赖NF-κB通路的激活。川芎嗪可抑制Ang II诱导的NF-κB激活与 BMP-2 表达降低,提示它在抗动脉粥样硬化形成中起重要作用。展开更多
In this study, a capillary electrophoresis immunoassay(CEIA) method based on the enhanced chemiluminescence(CL) detection was developed. A horseradish peroxidase(HRP) label catalyzing the luminol/H 2O 2/p-iodophenol(P...In this study, a capillary electrophoresis immunoassay(CEIA) method based on the enhanced chemiluminescence(CL) detection was developed. A horseradish peroxidase(HRP) label catalyzing the luminol/H 2O 2/p-iodophenol(PIP) reaction was performed, and the HRP was detected with detection limit(S/N=3) of 4.4 pmol/L(53 zmol), which is one of the highest sensitivity of HRP reported yet. The HRP was linked to bone morphogenic protein-2(BMP-2) in rat vascular smooth muscle(VSM) cells in noncompetitive format and first detected by CL. HRP-Ab 2-mAb-BMP-2 complexes were baseline separated from free HRP label in 3 min. The detection limit(S/N=3) of BMP-2 is 6.2 pmol/L(75 zmol). This technique has been applied to arteriosclerosis pathology research. The change of BMP-2 contentin VSM cells which were stimulated by angiotensin Ⅱ(AgⅡ) for different hours was investigated in the concentration range of 1.0-10.0 pmol/L. The results are in accord with that obtained by common used Pathology image analysis system.展开更多
基金the National Natural Science Foundation of China (No. 30570725)
文摘本文旨在观察血管紧张素II (angiotensin II, Ang II)对血管平滑肌细胞核转录因子-κB (nuclear factor-κB, NF-κB)的活性及骨形成蛋白-2 (bone morphogenetic protein-2, BMP-2)表达的影响,以探讨Ang II参与动脉粥样硬化的机制,并探讨川芎嗪是否能抑制Ang II的促动脉粥样硬化作用。采用Western blot、免疫组化和原位杂交等方法分别检测Ang II刺激和川芎嗪干预后NF-κB活性、BMP-2 蛋白和 mRNA 表达的变化。结果显示:(1) Ang II 刺激激活 NF-κB。Ang II 刺激 15 min 即有 NF-κB p65核转移,30 min 达高峰(P<0.01),1 h 后减退。川芎嗪抑制 Ang II诱导的NF-κB激活,与Ang II组比较,川芎嗪 + Ang II组NF-κB活性显著降低 (P<0.01)。 (2) Ang II 刺激 6 h 时 BMP-2 表达增强(P<0.05),12 h 时减弱(P<0.01),24 h 时更弱(P<0.01)。川芎嗪 + Ang II组中,川芎嗪干预6 h 时BMP-2 表达亦增强,12 与24 h 时保持正常水平。 (3) 川芎嗪对正常细胞的NF-κB活性和BMP-2 表达无影响。以上结果表明,Ang II刺激后激活NF-κB并最终使生长抑制因子BMP-2 表达下降,这可能是其参与动脉粥样硬化发生的机制之一。BMP-2 一过性增高可能不依赖NF-κB通路的激活。川芎嗪可抑制Ang II诱导的NF-κB激活与 BMP-2 表达降低,提示它在抗动脉粥样硬化形成中起重要作用。
文摘In this study, a capillary electrophoresis immunoassay(CEIA) method based on the enhanced chemiluminescence(CL) detection was developed. A horseradish peroxidase(HRP) label catalyzing the luminol/H 2O 2/p-iodophenol(PIP) reaction was performed, and the HRP was detected with detection limit(S/N=3) of 4.4 pmol/L(53 zmol), which is one of the highest sensitivity of HRP reported yet. The HRP was linked to bone morphogenic protein-2(BMP-2) in rat vascular smooth muscle(VSM) cells in noncompetitive format and first detected by CL. HRP-Ab 2-mAb-BMP-2 complexes were baseline separated from free HRP label in 3 min. The detection limit(S/N=3) of BMP-2 is 6.2 pmol/L(75 zmol). This technique has been applied to arteriosclerosis pathology research. The change of BMP-2 contentin VSM cells which were stimulated by angiotensin Ⅱ(AgⅡ) for different hours was investigated in the concentration range of 1.0-10.0 pmol/L. The results are in accord with that obtained by common used Pathology image analysis system.
