Characterization of PF4-Heparin Complexes by Photon Correlation Spectroscopy and Zeta Potential Journal Article

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Authors: Bertini, S.; Fareed, J; Madaschi, L.; Risi, G.; Torri, G.; Naggi, A.
Article Title: Characterization of PF4-Heparin Complexes by Photon Correlation Spectroscopy and Zeta Potential
Abstract: Heparin-induced thrombocytopenia (HIT) is associated with antibodies to complexes between heparin and platelet factor 4 (PF4), a basic protein usually found in platelet alpha granules. Heparin-induced thrombocytopenia antibodies preferentially recognize macromolecular complexes formed between positively charged PF4 and polyanionic heparins over a narrow range of molar ratios. The aim of this work was to study the complexes that human PF4 forms with heparins from various species, such as porcine, bovine, and ovine; heparins from various organs, such as mucosa and lung; and different low-molecular-weight heparins (LMWHs) at several stoichiometric ratios to evaluate their sizes and charges by photo correlation spectroscopy and zeta potential measurements. The resulting data of the PF4 complexes with unfractionated heparins (UFHs), LMWHs and their fractions, and oligosaccharide components suggest that the size of aggregates is not only a simple function of average molecular weight but also of the molecular weight distribution of the sample. Moreover, it was found that lower concentrations of the tested ovine-derived mucosal heparin are required to form the large PF4/heparin complexes as compared to mucosal porcine and bovine heparin.
Journal Title: Clinical Applied Thrombosis/Hemostasis
ISSN: 1938-2723
Publisher: Unknown  
Journal Place: United States
Date Published: 2017
Start Page: 1076029616685430
Language: eng
DOI/URL:

10.1177/1076029616685430
Notes: LR: 20170317; JID: 9508125; OTO: NOTNLM; aheadofprint; SO: Clin Appl Thromb Hemost. 2017 Jan 1:1076029616685430. doi: 10.1177/1076029616685430.