Role of carbohydrates in the viscosity and permeability of gastric mucin to hydrogen ion.

Role of carbohydrates in the viscosity and permeability of gastric mucin to hydrogen ion.
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碳水化合物在胃粘蛋白的粘度和对氢离子的渗透性中的作用。

DOI:
10.1016/0006-291x(87)91482-3
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发表时间:
1987
影响因子:
3.1
通讯作者:
Slomiany,A
Slomiany,A
中科院分区:
生物学4区
文献类型:
--
作者:
Slomiany,BL;Sarosiek,J;Slomiany,A

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研究了去除碳水化合物对胃粘蛋白粘度的影响及其对氢离子扩散的阻挡作用。从狗胃粘液中提纯的粘蛋白,用特定的外切糖苷酶进行部分或广泛的脱糖基化,然后用于测定。结果表明,去除外周岩藻糖或N-乙酰氨基葡萄糖仅使糖蛋白粘度降低约5%。然而,在去除唾液酸后,粘度下降了18%,而广泛的脱糖作用(去除86%的碳水化合物)使糖蛋白的粘度降低了40%。去除岩藻糖或N-乙酰半乳糖胺后,粘蛋白抑制氢离子扩散的能力提高了7%,去除唾液酸后,粘蛋白抑制氢离子扩散的能力提高了28%,而广泛脱糖的糖蛋白对氢离子的通透性降低了42%。结果表明,碳水化合物对胃粘蛋白的粘弹性和渗透选择性有重要作用。
The effect of carbohydrate removal on the viscosity of gastric mucin and its ability to impede the diffusion of hydrogen ion was investigated. The mucin, purified from dog gastric mucus, was subjected to partial or extensive deglycosylation with specific exoglycosidases and then used in the measurements. The obtained results revealed that removal of peripheral fucose or N-acetylglucosamine caused in each case only about 5% reduction of the glycoprotein viscosity. An 18% drop in the viscosity, however, occurred following removal of sialic acid, while extensive deglycosylation (removal of 86% carbohydrate) reduced the glycoprotein viscosity by 40%. The ability of mucin to retard the diffusion of hydrogen ion increased by 7% following removal of fucose or N-acetylgalactosamine, a 28% increase was obtained following removal of sialic acid, while the permeability to hydrogen ion of the extensively deglycosylated glycoprotein decreased by 42%. The results suggest that carbohydrates contribute significantly to the viscoelastic and permselective properties of gastric mucin.
狗胃粘液糖蛋白中的氢离子扩散:相关脂质和共价结合脂肪酸的影响。
DOI: 10.1016/0006-291x(84)91334-2
发表时间: 1984
影响因子: 3.1
作者:
Sarosiek,J;Slomiany,A;Takagi,A;Slomiany,BL
通讯作者: Slomiany,BL
DOI: --
发表时间: 1982
期刊: The Journal of biological chemistry
影响因子: --
作者:
Slomiany,BL;Banas-Gruszka,Z;Zdebska,E;Slomiany,A
通讯作者: Slomiany,A
DOI: --
发表时间: 1984
期刊: The Journal of biological chemistry
影响因子: --
作者:
Slomiany,BL;Zdebska,E;Slomiany,A
通讯作者: Slomiany,A
共价结合脂肪酸和相关脂质对囊性纤维化中胃粘液糖蛋白粘度的影响。
DOI: 10.1159/000199341
发表时间: 1986
期刊: Digestion
影响因子: 3.2
作者:
Slomiany,BL;Murty,VL;Carter,SR;Slomiany,A
通讯作者: Slomiany,A
与狗胃粘液糖蛋白相关的脂质。
DOI: --
发表时间: 1983
期刊: Journal of applied biochemistry
影响因子: --
作者:
Witas,H;Slomiany,BL;Zdebska,E;Kojima,K;Liau,YH;Slomiany,A
通讯作者: Slomiany,A