Isolation and characterization of a cholesterol crystallization promoter from human bile.

Isolation and characterization of a cholesterol crystallization promoter from human bile.
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从人胆汁中分离和表征胆固醇结晶促进剂。

DOI:
10.1016/0016-5085(93)90424-b
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发表时间:
1993
期刊:
影响因子:
29.4
通讯作者:
Holzbach,RT
Holzbach,RT
中科院分区:
医学1区
文献类型:
--
作者:
Abei,M;Kawczak,P;Nuutinen,H;Langnas,A;Svanvik,J;Holzbach,RT

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背景:最近关于胆固醇性胆结石发病机制的研究主要集中在在结石形成的初始阶段抑制或促进胆固醇结晶成核和/或生长的胆道蛋白之间的不平衡的潜在重要性。目前的研究描述了一种42千道尔顿胆道糖蛋白的纯化和部分表征,该蛋白显示出浓度依赖性胆固醇结晶促进活性。方法:采用色谱法分离纯化。表征步骤包括电泳,去糖基化,氨基酸和碳水化合物分析,以及晶体生长试验的活性分析。结果:42千道尔顿纯化的糖蛋白是一个广泛糖基化(37%)的单体,具有酸性等电点(pl < 4.1),这可能是基于碳水化合物部分的唾液酸含量。酶n去糖基化去除碳水化合物部分并使促进活性失活。此外,酶解蛋白质导致其完全的结构降解和功能失活。虽然糖蛋白是从正常的人胆囊中分离出来的,但它在胆结石相关样本中的存在是清楚的。结论:本报告概述了可能在胆结石疾病中具有重要病理生理意义的人胆道糖蛋白的生化特征。
Background:Recent studies on the pathogenesis of cholesterol gallstone disease have focused on the potential importance of an imbalance between biliary proteins having either inhibitory or promoting activities on nucleation and/or growth of cholesterol crystals as the initial stage in stone formation. The current study describes the purification and partial characterization of a 42-kilodalton biliary glycoprotein that shows concentration-dependent cholesterol crystallization-promoting activity.Methods:Chromatographie methods were used for separation and purification. Characterization steps included electrophoresis, deglycosylation, amino acid and carbohydrate analysis, and activity analysis by crystal growth assay.Results:The 42-kilodalton purified glycoprotein is an extensively glycosylated (37%) monomer with an acidic isoelectric point (pl < 4.1) that is probably based on the sialic acid content of the carbohydrate moiety. EnzymaticN-deglycosylation removes the carbohydrate moiety and inactivates the promoting activity. Furthermore, enzymatic proteolysis results in both its complete structural degradation and functional inactivation. Although the glycoprotein was isolated from normal human gallbladder biles, its presence in gallstone-associated samples is clearly shown.Conclusions:This report outlines biochemical features of a human biliary glycoprotein that may be of major pathophysiological significance in gallstone disease.
胆固醇胆结石患者胆囊胆汁中存在有效成核因子的证据
DOI: 10.1016/0016-5085(83)90428-6
发表时间: 1983
期刊: Gastroenterology
影响因子: 29.4
作者:
M. Burnstein;R. G. Ilson;C. Petrunka;R. D. Taylor;S. Strasberg
通讯作者: S. Strasberg
胆汁蛋白和胆固醇胆石症的成核缺陷。
DOI: 10.1016/0016-5085(87)90959-0
发表时间: 1987
期刊: Gastroenterology
影响因子: 29.4
作者:
S. Gallinger;P. Robert;C. Harvey;C. Petrunka;R. G. Ilson;S. Strasberg
通讯作者: S. Strasberg
DOI: 10.1016/0009-8981(87)90174-4
发表时间: 1987
期刊: Clinica chimica acta; international journal of clinical chemistry
影响因子: --
作者:
J. Drapers;A. Groen;J. P. Stout;C. Noordam;F. Hoek;P. Jansen;G. Tytgat
通讯作者: G. Tytgat
正常人胆囊胆汁中的蛋白质组分对胆固醇结晶的抑制和促进作用。
DOI: --
发表时间: 1991
影响因子: 6.5
作者:
Busch,N;Matiuck,N;Sahlin,S;Pillay,SP;Holzbach,RT
通讯作者: Holzbach,RT
DOI: 10.1172/jci111204
发表时间: 1984
期刊: The Journal of clinical investigation
影响因子: --
作者:
Holzbach,RT;Kibe,A;Thiel,E;Howell,JH;Marsh,M;Hermann,RE
通讯作者: Hermann,RE