Profile of von Willebrand factor antigen and von Willebrand factor propeptide in an overall TIA and ischaemic stroke population and amongst subtypes

William Tobin, J. A. Kinsella, G. F. Kavanagh, J. S. O'Donnell, R. T. McGrath, S. Tierney, B. Egan, T. M. Feeley, T. Coughlan, D. R. Collins, D. O'Neill, S. J.X. Murphy, S. J. Lim, R. P. Murphy, D. J.H. McCabe

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3 Scopus citations

Abstract

Introduction Von Willebrand factor propeptide (VWF:Ag II) is proposed to be a more sensitive marker of acute endothelial activation than von Willebrand factor antigen (VWF:Ag). Simultaneous data on VWF:Ag and VWF:Ag II profiles are very limited following TIA and ischaemic stroke. Methods In this prospective, observational, case-control study, plasma VWF:Ag and VWF:Ag II levels were quantified in 164 patients ≤ 4 weeks of TIA or ischaemic stroke (baseline), and then ≥ 14 days (14d) and ≥ 90 days (90d) later, and compared with those from 27 healthy controls. TIA and stroke subtyping was performed according to the TOAST classification. The relationship between VWF:Ag and VWF:Ag II levels and platelet activation status was assessed. Results ‘Unadjusted’ VWF:Ag and VWF:Ag II levels were higher in patients at baseline, 14d and 90d than in controls (p ≤ 0.03). VWF:Ag levels remained higher in patients than controls at baseline (p ≤ 0.03), but not at 14d or 90d after controlling for differences in age or hypertension, and were higher in patients at baseline and 90d after controlling for smoking status (p ≤ 0.04). ‘Adjusted’ VWF:Ag II levels were not higher in patients than controls after controlling for age, hypertension or smoking (p ≥ 0.1). Patients with symptomatic carotid stenosis (N = 46) had higher VWF:Ag and VWF:Ag II levels than controls at all time-points (p ≤ 0.002). There was no significant correlation between platelet activation status and VWF:Ag or VWF:Ag II levels. Conclusions VWF:Ag and VWF:Ag II levels are increased in an overall TIA and ischaemic stroke population, especially in patients with recently symptomatic carotid stenosis. VWF:Ag II was not superior to VWF:Ag at detecting acute endothelial activation in this cohort and might reflect timing of blood sampling in our study.

Original languageEnglish (US)
Pages (from-to)404-410
Number of pages7
JournalJournal of the Neurological Sciences
Volume375
DOIs
StatePublished - Apr 15 2017

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Keywords

  • Case-control
  • Stroke
  • TIA
  • Von Willebrand factor
  • Von Willebrand factor propeptide

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology

Cite this

Tobin, W., Kinsella, J. A., Kavanagh, G. F., O'Donnell, J. S., McGrath, R. T., Tierney, S., Egan, B., Feeley, T. M., Coughlan, T., Collins, D. R., O'Neill, D., Murphy, S. J. X., Lim, S. J., Murphy, R. P., & McCabe, D. J. H. (2017). Profile of von Willebrand factor antigen and von Willebrand factor propeptide in an overall TIA and ischaemic stroke population and amongst subtypes. Journal of the Neurological Sciences, 375, 404-410. https://doi.org/10.1016/j.jns.2017.02.045