Thromb Haemost 1990; 63(02): 279-281
DOI: 10.1055/s-0038-1645209
Original Article
Schattauer GmbH Stuttgart

Expression of the Drug-Dependent Antigen for Quinine-Dependent Antiplatelet Antibodies on GP III a but not that on GPI b, II b or IX on Human Endothelial Cells

Sharron L Pfueller
The Department of Medicine, Monash University Medical School, Alfred Hospital, Prahran, Victoria, Australia
,
Robyn A Bilston
The Department of Medicine, Monash University Medical School, Alfred Hospital, Prahran, Victoria, Australia
,
Stephen Jane
The Department of Medicine, Monash University Medical School, Alfred Hospital, Prahran, Victoria, Australia
,
Jannine Gibson
The Department of Medicine, Monash University Medical School, Alfred Hospital, Prahran, Victoria, Australia
› Author Affiliations
Further Information

Publication History

Received 08 September 1989

Accepted after revision 24 November 1989

Publication Date:
02 July 2018 (online)

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Summary

In quinine- and quinidine-induced thrombocytopenic purpura IgG antibodies are known to react in a drug-dependent manner with different combinations of surface glycoproteins (GP) Ib , IIb, IIIa and IX. Because endothelial cells share a number of properties of platelets, including the presence of GP Ilia and GPIb-like proteins, we have compared these two cell types for their quinine-dependent IgG binding abilities. By immunoblotting of endothelial cells, quinine-dependent IgG binding from four patient sera was observed only to a 93 kDa component corresponding to GP Ilia. Strong IgG binding independent of the drug was found at 170–180 kDa. Thus endothelial cells express the GP Ilia quinine-dependent epitope on platelet GP IIIa , but not those on other platelet glycoproteins.