用体外模拟方法研究了从海藻异枝麒膦菜中提取的硫酸多糖(ESPS)对尿结石患者尿液中草酸钙晶体生长的影响.ESPS不但诱导与尿路细胞膜粘附力较弱的二水草酸钙晶体形成,而且抑制一水草酸钙的生长和聚集,归因于一水草酸钙的富钙(101)晶面与聚阴离子ESPS之间的静电相互作用.上述结果表明,ESPS是一种抑制草酸钙结石的潜在绿色药物.
The influence of sulfated polysaccharide (ESPS) isolated from marine algae Eucheuma striatum on crystallization of calcium oxalate crystals was investigated in urine of lithogenic patient in vitro. SPS could inhibit the growth and aggregation of calcium oxalate monohydrate (COM) and induce the formation of calcium oxalate dihydrate crystals due to the strong electrostatic interactions between the Ca^2+ -rich (101) crystal faces of COM and the polyanionic polysaccharide. This result indicated that SPS may be a potential inhibitor to calcium oxalate urinary stones.