PMID: 9557878Apr 29, 1998Paper

Inflammation-induced expression of sialyl LewisX is not restricted to alpha1-acid glycoprotein but also occurs to a lesser extent on alpha1-antichymotrypsin and haptoglobin

Glycoconjugate Journal
E C Brinkman-van der LindenWillem Van Dijk

Abstract

Acute and chronic inflammation-induced expression of sialyl LewisX has already been shown to occur on alpha1-acid glycoprotein. We now demonstrate that this phenomenon is not restricted to alpha1-acid glycoprotein but also occurs on two other acute-phase proteins. ie on alpha1-antichymotrypsin and on haptoglobin. The level of expression of sialyl LewisX on these proteins was lower than on alpha1-acid glycoprotein, in all likelihood because alpha1-acid glycoprotein is the only acute-phase protein containing tetraantennary glycans. No expression of sialyl LewisX was detectable on alpha1-protease inhibitor, a protein with a high diantennary glycan content. Non-sialylated LewisX was not detectable on these major acute-phase proteins in any of the conditions studied. This indicates that the majority of the a3-linked fucose residues are present as sialyl LewisX on alpha1-acid glycoprotein, alpha1-antichymotrypsin and haptoglobin. The absolute contribution to the total phenotype in plasma of protein containing this determinant in a multivalent form was highest for alpha1-acid glycoprotein. This leads us to propose that alpha1-acid glycoprotein is, among the acute-phase proteins studied, the one with the highest potential for interfere...Continue Reading

Citations

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