AIM: To study the characteristics of the four bioactive pure polysaccharides of Panax quiquefolium L. (PPQI 1～4). METHODS: The polysaccharides were extracted with hot water and grade precipitated with ethanol. They w...AIM: To study the characteristics of the four bioactive pure polysaccharides of Panax quiquefolium L. (PPQI 1～4). METHODS: The polysaccharides were extracted with hot water and grade precipitated with ethanol. They were further purified with Sephadex DEAE A50 and Sephadex G200 chromatography. The molecular weights of the polysaccharides were determined with matrix assisted laser desorption/ionization mass spectrometry (MALDI MS). The sugar compositions were analyzed with GC. The linkage positions of the component sugars were determined by methylation and GC MS. RESULTS: The four polysaccharides are all uronic acid containing heteropolysaccharides with the component sugars of arabinose, galactose and glucose in different molar ratios. The uronic acid contents are within 30%～60%. Their molecular weights are in the range of 2×10 4～7×10 4 u. CONCLUSION: The four new bioactive polysaccharides are all uronic acid containing heteropolysaccharides.展开更多
目的探讨血管紧张素Ⅱ(A ngⅡ)、转化生长因子1β(TGF-1β)、基质金属蛋白酶-1(MM P-1)及其抑制剂(T IM P-1)与原发性高血压(EH)左心室肥厚(LVH)的关系。方法对81例EH患者行超声心动仪检测,根据其结果计算左心室重量指数(LVM I),分为左...目的探讨血管紧张素Ⅱ(A ngⅡ)、转化生长因子1β(TGF-1β)、基质金属蛋白酶-1(MM P-1)及其抑制剂(T IM P-1)与原发性高血压(EH)左心室肥厚(LVH)的关系。方法对81例EH患者行超声心动仪检测,根据其结果计算左心室重量指数(LVM I),分为左心室肥厚(LVH)组和非肥厚(NLVH)组;检测其血中A ngⅡ、TGF-1β、MM P-1、T IM P-1水平,并与对照组进行对比分析。结果EH患者血中A ngⅡ、TGF-1β、T IM P-1水平均较对照组显著增高,而MM P-1水平显著降低;LVH组尤甚。LVM I与A ngⅡ、TGF-1β、T IM P-1呈显著正相关,与MM P-1呈显著负相关。结论MM P-1水平降低、T IM P-1水平升高是导致心肌胶原代谢紊乱,促进LVH形成的重要因素;TGF-1β不仅直接抑制MM P-1表达,而且介导A ngⅡ作用,共同促进LVH形成。展开更多
文摘AIM: To study the characteristics of the four bioactive pure polysaccharides of Panax quiquefolium L. (PPQI 1～4). METHODS: The polysaccharides were extracted with hot water and grade precipitated with ethanol. They were further purified with Sephadex DEAE A50 and Sephadex G200 chromatography. The molecular weights of the polysaccharides were determined with matrix assisted laser desorption/ionization mass spectrometry (MALDI MS). The sugar compositions were analyzed with GC. The linkage positions of the component sugars were determined by methylation and GC MS. RESULTS: The four polysaccharides are all uronic acid containing heteropolysaccharides with the component sugars of arabinose, galactose and glucose in different molar ratios. The uronic acid contents are within 30%～60%. Their molecular weights are in the range of 2×10 4～7×10 4 u. CONCLUSION: The four new bioactive polysaccharides are all uronic acid containing heteropolysaccharides.
文摘目的探讨血管紧张素Ⅱ(A ngⅡ)、转化生长因子1β(TGF-1β)、基质金属蛋白酶-1(MM P-1)及其抑制剂(T IM P-1)与原发性高血压(EH)左心室肥厚(LVH)的关系。方法对81例EH患者行超声心动仪检测,根据其结果计算左心室重量指数(LVM I),分为左心室肥厚(LVH)组和非肥厚(NLVH)组;检测其血中A ngⅡ、TGF-1β、MM P-1、T IM P-1水平,并与对照组进行对比分析。结果EH患者血中A ngⅡ、TGF-1β、T IM P-1水平均较对照组显著增高,而MM P-1水平显著降低;LVH组尤甚。LVM I与A ngⅡ、TGF-1β、T IM P-1呈显著正相关,与MM P-1呈显著负相关。结论MM P-1水平降低、T IM P-1水平升高是导致心肌胶原代谢紊乱,促进LVH形成的重要因素;TGF-1β不仅直接抑制MM P-1表达,而且介导A ngⅡ作用,共同促进LVH形成。
