单分子膜诱导下尿大分子对草酸钙晶体物相和晶面的调控作用  

Modulation of Urinary Macromolecules Induced by DPPC Monolayers on Morphology and Crystal Face of Calcium Oxalate Crystals

作　　者：欧阳健明[1] 邓穗平[1] 钟玖平[1] 

机构地区：[1]暨南大学生物矿化与结石病防治研究所,广州510630

出　　处：《高等学校化学学报》2004年第5期802-805,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金重点项目 (批准号 :2 0 0 3 10 10 );广东省自然科学重点基金 (批准号 :0 13 2 0 2);广东省重点攻关项目(批准号 :C3 14 0 1);广东省 "千百十工程 "优秀人才培养基金(批准号 :Q 0 2 0 60 );广州市重点科技项目(批准号 :SZ-613 )资助

摘　　要：采用 SEM,XRD和 FTIR手段比较研究了 DPPC单分子膜诱导下尿大分子硫酸软骨素 A( C4 S)、硫酸软骨素 C( C6 S)和血清蛋白 ( SA)对尿石盐草酸钙晶体生长的影响 . DPPC单分子膜不但优先选择一水草酸钙( COM)物相成核生长 ,而且优先选择 COM的 ( 1 0 1 )晶面 .没有添加剂时 ,得到的 COM为三维的六棱柱和三维的菱形晶体 ;加入尿大分子抑制剂后 ,COM的 ( 1 0 1 )晶面进一步加强 ,其它晶面减弱 ,导致二维晶体的形成 .COM的 ( 1 0 1 )晶面为富钙离子晶面 ,带有过剩的正电荷 ,而 DPPC单分子膜头基带有负电荷 ,几种尿大分子在实验条件下亦带有负电荷 ,带负电荷的单分子膜及带负电荷的大分子共同作用于富钙离子的 ( 1 0 1 )晶面 ,使得 COM的 ( 1 0 1 )晶面择优生长 . C4 S,C6 S和 SA的存在均能有效地抑制The effect of urinary macromolecules such as chondroitin sulfate A(C 4S), chondroitin sulfate C(C 6S) and serum albumin(SA) on urinary crystal calcium oxalate grown beneath dipalmitoylphosphatidylcholine (DPPC) monolayer was investigated by using scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and Fourier transform infrared analysis(FTIR). Only the calcium oxalate monohydrate (COM) was nucleated and grown beneath the monolayer with the (101) face oriented preferentially towards the monolayer interface. On the monolayer in the absence of additives, the tri-dimensional prismy COM crystals precipitated. However, the (101) face of COM was doubly strengthened and the other faces were weakened in the presence of urinary macromolecule inhibitors. This leads to the formation of two-dimensional plate-like COM crystals. The result is attributed to the interaction between the positively charged calcium-rich (101) face of COM with the negative-charged headgroups of the monolayer and the negatively charged macromolecules. All the three additives can inhibit the growth of COM crystals.

关 键 词：单分子膜 尿大分子抑制剂 草酸钙晶体 物相 晶面 调控作用 尿结石 形成机理 

分 类 号：R691.4[医药卫生—泌尿科学]