Preparation of lipid-derivatized glycosaminoglycans to probe a regulatory function of the carbohydrate moieties of proteoglycans in cell-matrix interaction.

Preparation of lipid-derivatized glycosaminoglycans to probe a regulatory function of the carbohydrate moieties of proteoglycans in cell-matrix interaction.
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制备脂质衍生糖胺聚糖以探测蛋白聚糖碳水化合物部分在细胞-基质相互作用中的调节功能。

DOI:
10.1016/s0021-9258(18)82323-7
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发表时间:
1993
期刊:
The Journal of biological chemistry
影响因子:
--
通讯作者:
Koji KimataSY
Koji KimataSY
中科院分区:
--
文献类型:
--
作者:
Nobuo SugiuraS;Katsukiyo Sakurais;Yusuke Horis;Kenichiro Karasawas;Sakaru Suzukit;Koji KimataSY

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我们之前已经证明,如果外部蛋白多糖拓扑固定在塑料板上,则与天然核心蛋白或血清白蛋白连接的硫酸软骨素(而不是硫酸乙酰肝素/肝素)会干扰细胞与基质的粘附。为了研究糖胺聚糖链 (GAG) 作为识别结构的作用,现在开发了一种新的检测系统,该系统涉及将游离 GAG 转化为在还原端选择性修饰的反应性内酯衍生物。修饰后的 GAG 可以与磷脂酰乙醇氨基 (PE) 的氨基偶联,用作塑料板或细胞表面上的探针。在聚苯乙烯板上孵育 GAG-PE 溶液会导致非共价固定在板上的 GAG 链密度随时间和剂量依赖性增加。任何经磷脂酶 D 处理的 GAG-PE 样品均未检测到固定。A M(r) 30,000 硫酸软骨素与 PE 的结合物 (CS-PE),当以 0.06 微克/100 微升/孔的初始浓度固定在纤连蛋白包被的孔上 2 小时时,可抑制幼仓鼠肾 (BHK) 细胞与基质的粘附约50%,而肝素-、硫酸乙酰肝素-、透明质酸-和硫酸皮肤素-PE 则不然。用软骨素酶 ABC 处理 CS-PE 包被的板可以消除 CS-PE 的作用。当使用含有 RGD 的 120 kDa 纤连蛋白片段代替纤连蛋白时,发现 CS-PE 具有类似的抑制水平。可溶形式的CS-PE一旦接触到悬浮的BHK细胞,就可以与细胞表面结合,从而对细胞与基质的粘附产生一些抑制作用。然而,以每摩尔为基础,细胞相关 CS-PE 的活性远低于底物相关 CS-PE。总之,这些结果表明,我们的 GAG-PE 为探测蛋白聚糖的 GAG 部分的调节功能提供了有用的工具,并进一步支持了这样的假设:大硫酸软骨素蛋白聚糖对细胞与基质粘附的抑制性调节是由细胞表面和拓扑固定在细胞外基质上的硫酸软骨素链之间的相互作用引起的。
We have shown previously that chondroitin sulfate, but not heparan sulfate/heparin, linked to either natural core proteins or serum albumin interferes with cell-to-substrate adhesion, provided that the external proteoglycans are topologically immobilized on plastic plates. In order to study the roles of glycosaminoglycan chains (GAGs) as recognition structure, a new assay system is now developed which involves the conversion of free GAGs to reactive lactone derivatives selectively modified at the reducing end. The modified GAGs can be coupled to the amino group of phosphatidylethanolamino (PE) for use as probes on either plastic plates or cell surfaces. Incubation of GAG-PE solutions in polystyrene plates results in a time- and dose-dependent increase of the density of the GAG chains noncovalently immobilized onto the plates. No immobilization is detected with any of the GAG-PE samples that have been treated with phospholipase D. A M(r) 30,000 chondroitin sulfate conjugate to PE (CS-PE), when immobilized onto a fibronectin-coated well for 2 h at an initial concentration of 0.06 microgram/100 microliters/well, inhibits the adhesion of baby hamster kidney (BHK) cells to the substratum by approximately 50%, whereas heparin-, heparan sulfate-, hyaluronic acid-, and dermatan sulfate-PE do not. The effect of CS-PE is abolished by treating the CS-PE-coated plates with chondroitinase ABC. A similar level of inhibition by CS-PE is found when the RGD-containing 120-kDa fragment of fibronectin is used in place of fibronectin. CS-PE in soluble form, once exposed to BHK cells in suspension, can be associated with the cell surfaces, thereby exerting some inhibitory effects on cell-to-substrate adhesion. On a per mol basis, however, the activity of cell-associated CS-PE is far lower than that of substrate-associated CS-PE. Together the results indicate that our GAG-PEs offer useful tools for probing regulatory function of the GAG moieties of proteoglycans and further support the hypothesis that the inhibitory regulation of cell-to-matrix adhesion by large chondroitin sulfate proteoglycans is caused by an interaction between the cell surface and the chondroitin sulfate chains topologically immobilized on extracellular matrices.
DOI: 10.1016/0006-291x(85)91158-1
发表时间: 1985
影响因子: 3.1
作者:
Tang,PW;Gool,HC;Hardy,M;Lee,YC;Feizi,T
通讯作者: Feizi,T
通过固定在细胞外基质上的蛋白聚糖调节细胞基质粘附。
DOI: --
发表时间: 1989
期刊: The Journal of biological chemistry
影响因子: --
作者:
Yamagata,M;Suzuki,S;Akiyama,SK;Yamada,KM;Kimata,K
通讯作者: Kimata,K
大鼠肿瘤细胞产生的蛋白多糖对其与纤连蛋白-胶原蛋白基质粘附的影响。
DOI: --
发表时间: 1983
期刊: Cancer research
影响因子: 11.2
作者:
Brennan,MJ;Oldberg,A;Hayman,EG;Ruoslahti,E
通讯作者: Ruoslahti,E