Venous and aortic porcine endothelial cells cultured under standardized conditions synthesize heparan sulfate chains which differ in charge.

Venous and aortic porcine endothelial cells cultured under standardized conditions synthesize heparan sulfate chains which differ in charge.
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在标准化条件下培养的静脉和主动脉猪内皮细胞合成电荷不同的硫酸乙酰肝素链。

DOI:
10.1016/0003-2697(91)90001-a
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发表时间:
1991
影响因子:
2.9
通讯作者:
Joyce,JG
Joyce,JG
中科院分区:
生物学4区
文献类型:
--
作者:
Lowe-Krentz,LJ;Joyce,JG

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肝素上抗凝血酶III结合位点的特定所需碳水化合物结构的鉴定表明,糖胺聚糖链中可能存在这些碳水化合物的其他血管功能所必需的特定结构。确定这种差异的存在需要一种机制,从特定的血管床的内皮细胞分离硫酸乙酰肝素。本报告表明,培养的静脉和主动脉内皮细胞合成硫酸乙酰肝素链不同的电荷密度。这项工作得出了两个重要结论。(i)来自不同血管的内皮细胞(即,腔静脉和胸主动脉)合成在负电荷和硫酸化模式方面不同的硫酸乙酰肝素。具体而言,主动脉内皮硫酸乙酰肝素比静脉硫酸乙酰肝素具有更高的负电荷。在硫酸乙酰肝素的亚硝酸降解产物中也观察到差异。(ii)培养中的内皮细胞在规定条件下传代培养数月后仍能在体外合成不同的硫酸乙酰肝素。这些结果表明,它是可行的,以表征硫酸乙酰肝素使用培养的内皮细胞从各种血管床。
The identification of a specific required carbohydrate structure for the antithrombin III binding site on heparin suggests that there may be specific structures in glycosaminoglycan chains which are necessary for other vascular functions of these carbohydrates. Determining that such differences exist requires a mechanism to isolate heparan sulfates from endothelial cells of specific vascular beds. The present report indicates that cultured venous and aortic endothelial cells synthesize heparan sulfate chains differing in charge density. There are two important conclusions from this work. (i) Endothelial cells from different blood vessels (i.e., vena cava and thoracic aorta) synthesize heparan sulfates which differ in negative charge and sulfation pattern. Specifically, aortic endothelial heparan sulfates have a higher negative charge than venous heparan sulfates. Differences are also observed in the nitrous acid degradation products of the heparan sulfates. (ii) Endothelial cells in culture retain the ability to synthesize different heparan sulfates in vitro after months of subculture under defined conditions. These results indicate that it is feasible to characterize heparan sulfates using cultured endothelial cells from a variety of vascular beds.
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