知识与财富的链接
目的：研究三七总甙对NB4细胞促凝活性和组织因子表达及诱导分化作用的影响：方法：用三七总甙处理NB4细胞,测定复钙时间观察NB4细胞的促凝活性(procoagulant activity,PCA),RT—PCR检测TF—mRNA的表达;采用四唑蓝(MTT)法检测三七总甙对NB4细胞增殖抑制作用;以NBT还原实验、细胞形态学观察及流式细胞术分析研究三七总甙对NB4细胞诱导分化的影响。结果：(1)不同浓度三七总甙均可显著延长NB4细胞的复钙时间,降低NB4细胞的PCA水平,呈时间浓度依赖性,同时下调组织因子TF—mRNA的表达;(2)三七总甙可部分抑制NB4细胞的增殖;(3)三七总甙可提高NB4细胞NBT还原能力(P<0.05),细胞形态方面显示单核／巨噬细胞分化趋势。结论：三七总甙可降低NB4细胞的促凝活性及TF—mRNA的表达,诱导NB4细胞部分分化,有望作为新的抗凝药物。
Objective:To investigate the effect of Panax notoginseng saponin (PNS) on procoagulant activity (PCA) and differentiation induction in NB4 cells. Methods:After NB4 cells were treated with PNS, the recalcification time, PCA and TF-mRNA expression in NB4 cells were tested by RT-PCR. The inhibitory effect of PNS on NB4 cell proliferation was analysed by MTT method, NBT assay, cell morphological observation and flow cytometry. Results:(1) PNS of all concentrations could significantly prolong the recalcification time and lower the PCA level in NB4 cells in time-concentration-dependent manner. Simultaneously it down-regulated the expression of TF-mRNA. (2) PNS could partially inhibit the NB4 cell proliferation. (3) PNS could raise the NBT reducing capabitity of NB4 cells (P<0.05). And morphological examination showed the differentiating tendency of monocyte and macrophage. Conclusion:PNS could reduce the procoagulant activity and TF-mRNA expression in NB4 cells, and partially induce the differentiation of NB4 cells, therefore, it is hopeful to be a new anti-coagulant agent.
