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Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation
Published on: August 14, 2017
Von Willebrand factor and ADAMTS13 activity in relation to risk of dementia: a population-based study
Frank J Wolters1,2, Johan Boender3, Paul S de Vries4
1Department of Epidemiology, Erasmus Medical Centre, Rotterdam, The Netherlands.
Insights
Higher Von Willebrand factor (VWF) and low ADAMTS13 activity are linked to dementia risk. Low ADAMTS13 activity showed a consistent association with dementia over time, especially in individuals with diabetes.
Area of Science:
- Neurology
- Cardiovascular Medicine
- Hematology
Background:
- Cardiovascular health influences cognitive decline.
- The roles of Von Willebrand factor (VWF) and ADAMTS13 in dementia risk are not well understood.
- Low ADAMTS13 activity is linked to cardiovascular disease via VWF proteolysis.
Purpose of the Study:
- To investigate the association between VWF and ADAMTS13 levels and the risk of dementia.
- To explore potential interactions between VWF, ADAMTS13, and dementia risk over time.
- To examine the modifying effect of diabetes on these associations.
Main Methods:
- Analysis of VWF antigen and ADAMTS13 activity in 6055 participants from the Rotterdam Study (1997-2002).
- Assessment of dementia prevalence at baseline and incidence over 15 years of follow-up.
- Statistical modeling to evaluate associations and interactions, adjusting for potential confounders.
Main Results:
- Higher VWF was associated with dementia prevalence and short-term risk, but this association attenuated over time.
- Low ADAMTS13 activity was consistently associated with an increased risk of dementia throughout the follow-up period.
- The association between low ADAMTS13 activity and dementia risk was modified by diabetes, indicating a stronger effect in diabetic individuals.
Conclusions:
- Both higher VWF and low ADAMTS13 activity are associated with an increased risk of dementia.
- The distinct temporal patterns and lack of synergistic effects suggest partially independent underlying mechanisms.
- Low ADAMTS13 activity may represent a significant risk factor for dementia, particularly in the context of diabetes.
Abstract:
Low ADAMTS13 activity is associated with an increased risk of cardiovascular disease, which is generally attributed to its proteolytic effects on Von Willebrand factor (VWF). Cardiovascular health is an important determinant of cognitive decline, but the association of either VWF or ADAMTS13 with risk of dementia is unknown. Between 1997-2002, we measured VWF antigen and ADAMTS13 activity in 6055 participants of the population-based Rotterdam Study (mean age 69.3 years, 57.2% women). At baseline, 85 participants had dementia, and during 15 years of follow-up 821 developed dementia. Higher VWF was associated with prevalence and risk of dementia, unaffected by concurrent ADAMTS13 activity, but estimates strongly attenuated over time and were no longer statistically significant at 4 years of follow-up (relative risks [95% CI] per standard deviation increase- cross-sectional: 1.37 [1.06-1.77], and longitudinal: 1.05 [0.97-1.14]). In contrast, low ADAMTS13 was associated with increased risk of dementia throughout follow-up (hazard ratio per SD decrease- 1.16 [1.06-1.28]), which alike for ischaemic stroke, was modified by the presence of diabetes (P-interaction = 0.003). In conclusion, higher VWF and low ADAMTS13 activity are associated with increased risk of dementia, but differences in time-course and lack of synergistic effects may indicate in part independent underlying mechanisms.
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