Holmer E, Kurachi K, Söderström G
Biochem J. 1981 Feb 1;193(2):395-400. doi: 10.1042/bj1930395.
Heparin fractions of different molecular weight and with high affinity for antithrombin were studied with respect to their ability to potentiate the inhibition of activated clotting factors by antithrombin. Inhibition of thrombin, Factor IXa and Factor XIa showed similarities in the dependence on the molecular weight of heparin and was found to decrease with decreasing molecular weight. Inactivation of Factor Xa, Factor XIIa and kallikrein was, however, less dependent on the size of the polysaccharide and, to a great extent, was potentiated even by low-molecular-weight heparin fractions that had virtually no effect on the inhibition of thrombin, Factor IXa and Factor XIa.
研究了不同分子量且对抗凝血酶具有高亲和力的肝素组分增强抗凝血酶对活化凝血因子抑制作用的能力。凝血酶、因子IXa和因子XIa的抑制在对肝素分子量的依赖性方面表现出相似性,并且发现随着分子量的降低而降低。然而,因子Xa、因子XIIa和激肽释放酶的失活对多糖大小的依赖性较小,并且在很大程度上,即使是对凝血酶、因子IXa和因子XIa的抑制几乎没有作用的低分子量肝素组分也能增强其失活作用。