ArticleJournal of lipid research2024
Phosphatidylthreonine is a procoagulant lipid detected in human blood and elevated in coronary artery disease.
Article in Journal of lipid research, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 7 citations in OpenAlex.
- Structural basis for membrane binding by coagulation factors V and VIII and their specificity for phosphatidylserine-containing membranes.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
- Outcomes and future activities of the 'Pan-European network in Lipidomics and EpiLipidomics - EpiLipidNET'.Metabolomics : Official journal of the Metabolomic Society · 2026Review
- Extracellular vesicle-mediated immunomodulation and targeted delivery: breakthroughs and challenges in rheumatoid arthritis therapy.Frontiers in immunology · 2026Review
- The Nanodisc System for Investigating Protein-Lipid Interactions.Methods in molecular biology (Clifton, N.J.) · 2026Review
- Metabolomic Biomarkers for Non-Invasive Diagnosis of Coronary Artery Disease and Obstructive Sleep Apnea Co-Occurrence.Nature and science of sleep · 2026Article
- Nanodiscs for the study of membrane proteins.Current opinion in structural biology · 2024Review
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Authors and funding
18 authors at 8 institutions in 5 countries.
Funding
Abstract
Aminophospholipids (aPL) such as phosphatidylserine are essential for supporting the activity of coagulation factors, circulating platelets, and blood cells. Phosphatidylthreonine (PT) is an aminophospholipid previously reported in eukaryotic parasites and animal cell cultures, but not yet in human tissues. Here, we evaluated whether PT is present in blood cells and characterized its ability to support coagulation. Several PT molecular species were detected in human blood, washed platelets, extracellular vesicles, and isolated leukocytes from healthy volunteers using liquid chromatography-tandem mass spectrometry. The ability of PT to support coagulation was demonstrated in vitro using biochemical and biophysical assays. In liposomes, PT supported prothrombinase activity in the presence and absence of phosphatidylserine. PT nanodiscs strongly bound FVa and lactadherin (nM affinity) but poorly bound prothrombin and FX, suggesting that PT supports prothrombinase through recruitment of FVa. PT liposomes bearing tissue factor poorly generated thrombin in platelet poor plasma, indicating that PT poorly supports extrinsic tenase activity. On platelet activation, PT is externalized and partially metabolized. Last, PT was significantly higher in platelets and extracellular vesicle from patients with coronary artery disease than in healthy controls. In summary, PT is present in human blood, binds FVa and lactadherin, supports coagulation in vitro through FVa binding, and is elevated in atherosclerotic vascular disease. Our studies reveal a new phospholipid subclass, that contributes to the procoagulant membrane, and may support thrombosis in patients at elevated risk.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.