Karayiannis, C and Moran, C and Sharman, JE and Beare, R and Quinn, SJ and Phan, TG and Wood, AG and Thrift, AG and Wang, WC and Srikanth, V, Blood pressure, aortic stiffness, hemodynamics, and cognition in twin pairs discordant for type 2 diabetes, Journal of Alzheimer's Disease, 71, (3) pp. 763-773. ISSN 1387-2877 (2019) [Refereed Article]
Copyright 2019 ISO Press and the authors
Objective: We examined the role of blood pressure (BP), aortic stiffness, and hemodynamics in this association.
Methods: Cross-sectional sample of late middle-aged twins discordant for T2D from the Australian Twin Registry. Measurements included neuropsychological battery and brain MRI including arterial spin labelling (ASL) to measure cerebral perfusion. Mobil-o-Graph devices were used to non-invasively obtain 24-hour BP, aortic stiffness, and hemodynamic measures. Using mixed modelling, we studied associations of T2D with cognition, MRI measures, BP, aortic stiffness, and hemodynamics.
Results: There were 23 twin pairs with mean age 63.7 (SD = 6.1) years. T2D (β=-0.45, p < 0.001) and age (β=-0.05, p = 0.022) were independently associated with poorer attention but not with memory or perceptual speed. T2D was associated with reduced nocturnal central systolic BP dipping (β=-3.79, p = 0.027), but not with BP, aortic stiffness, cerebral perfusion, or other hemodynamic measures. There was a statistically significant interaction between T2D and central systolic BP dipping in predicting attention scores (both p < 0.05 for the interaction term) whereby there was a positive association between BP dipping and attention scores in those with T2D, but not in those without T2D.
Conclusion: We found an association between T2D and reduced nocturnal central systolic dipping, but not with any other measures of BP, stiffness or hemodynamic measures. Further study of the role of nocturnal central BP dipping in the association between T2D and cognitive impairment may help identify potential mechanisms.
|Item Type:||Refereed Article|
|Keywords:||blood pressure, cerebrovascular circulation, cognitive dysfunction, dementia, hemodynamics, type 2 diabetes mellitus, vascular stiffness|
|Research Division:||Medical and Health Sciences|
|Research Field:||Neurology and Neuromuscular Diseases|
|Objective Group:||Clinical Health (Organs, Diseases and Abnormal Conditions)|
|UTAS Author:||Sharman, JE (Professor James Sharman)|
|UTAS Author:||Srikanth, V (Dr Velandai Srikanth)|
|Deposited By:||Menzies Institute for Medical Research|
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