Plasma contact activation by a fucosylated chondroitin sulfate and its structure-activity relationship study

Glycobiology
Lisha LinJinhua Zhao

Abstract

Plasma contact system is the initial part of both the intrinsic coagulation pathway and kallikrein-kinin pathway, which mainly involves three proteins: coagulation factor XII (FXII), prekallikrein (PK) and high-molecular weight kininogen. Fucosylated chondroitin sulfate (FCS) is a unique sulfated glycosaminoglycan (GAG) composed of a chondroitin sulfate-like backbone and sulfated fucose branches. The native FCS was preliminary found to cause undesired activation of the plasma contact system. How this unusual GAG functions in this process remains to be clarified. Herein, the relationship between its structure, plasma contact activation and its effects on the PK-FXII reciprocal activation loop were studied. The recalcification time assay indicated that the FCS at high concentration could be procoagulant which may be attributed to its contact activation activity. The structure-activity relationship study indicated that its high molecular weight and distinct fucose side chains are required for contact activation by FCS, although the sulfate substitution types of its side chains have less impact. In human plasma, the native FCSs potently induced FXII-dependent contact activation. However, in purified systems FCS did not significantl...Continue Reading

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Citations

Aug 4, 2019·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Vitor H PominBarbara Mulloy
Oct 1, 2021·Hämostaseologie·Sandra KonrathThomas Renné

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