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Updated: Aug 15, 2026
11:10
Antibody Binding Specificity for Kappa (Vκ) Light Chain-containing Human (IgM) Antibodies: Polysialic Acid (PSA) Attached to NCAM as a Case Study
Published on: June 29, 2016
Phospholipid binding plasma proteins required for antiphospholipid antibody detection--an overview
J A McIntyre1, D R Wagenknecht, T Sugi
1Methodist Center for Reproduction and Transplantation Immunology, Indianapolis, IN, USA.
Summary
Most antibodies to phospholipid antigens (aPA) target phospholipid-binding proteins, not phospholipids directly. Understanding these interactions is key to treating aPA-associated thrombosis.
Area of Science:
- Immunology
- Hematology
- Biochemistry
Background:
- Antibodies to phospholipid antigens (aPA) are linked to thrombosis, thrombocytopenia, and recurrent pregnancy loss.
- Current research indicates that many aPA target phospholipid-binding plasma proteins rather than phospholipids themselves.
Purpose of the Study:
- To review phospholipid-binding proteins.
- To illustrate how phospholipid-protein interactions generate neo-autoantigenic epitopes.
- To present a model for aPA-mediated thrombosis.
Main Methods:
- Comprehensive review of existing scientific data and literature.
Main Results:
- Demonstration of interactions between plasma proteins (beta 2 glycoprotein I, prothrombin, kininogens) and anionic (cardiolipin, phosphatidylserine) and zwitterionic (phosphatidylethanolamine) phospholipids.
- Presentation of a model illustrating the mechanism of aPA-mediated thrombosis.
Conclusions:
- While some aPA directly recognize phospholipids, the majority implicated in pathology target phospholipid-binding proteins.
- aPA represent a diverse group of antibodies with multiple specificities.
- Elucidating the mechanisms of aPA-associated thrombosis will inform therapeutic strategies.
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