Evaluating the relationship of blood pressure, plasma angiotensin peptides and aldosterone with cognitive functions in patients with hypertension

Authors

  • Selçuk Sen Department of Medical Pharmacology, Istanbul Faculty of Medicine, Istanbul University, 34390 Fatih, Istanbul, Turkey
  • Nermin Gürel Department of Medical Pharmacology, Istanbul Faculty of Medicine, Istanbul University, 34390 Fatih, Istanbul, Turkey
  • Baran Ufuktepe Department of Medical Pharmacology, Istanbul Faculty of Medicine, Istanbul University, 34390 Fatih, Istanbul, Turkey
  • Zeynep Günes Özünal Department of Medical Pharmacology, Istanbul Faculty of Medicine, Istanbul University, 34390 Fatih, Istanbul, Turkey
  • Çagla Büyüklü Department of Neuroscience, Institute of Experimental Medicine, Istanbul University, 34393 Fatih, Istanbul, Turkey
  • Yagiz Üresin Department of Medical Pharmacology, Istanbul Faculty of Medicine, Istanbul University, 34390 Fatih, Istanbul, Turkey

DOI:

https://doi.org/10.17179/excli2016-725

Keywords:

hypertension, cognitive functions, angiotensin, aldosterone

Abstract

Renin Angiotensin Aldosterone System (RAAS) plays an important role in the development of hypertension. On the other hand, hypertension is a well-known and independent risk factor for cognitive impairment. The aim of the present study was to evaluate the relationship of blood pressure control, plasma angiotensin peptides and aldosterone with cognitive functions. Forty-one patients who were under treatment with the same antihypertensive medications for at least three months were included in the study. Plasma angiotensin II, angiotensin 1-7, angiotensin IV, and aldosterone concentrations were analyzed using an enzyme-linked immunosorbent assay (ELISA). Standardized Mini Mental State Examination (SMMSE) was used to evaluate cognitive functions. When the participants were grouped according to their SMMSE scores (cut-off value: 26 points), we determined significant differences between systolic blood pressure (SBP) levels, diastolic blood pressure levels, plasma angiotensin II and angiotensin 1-7 concentrations of the groups. When the participants were stratified according to their SBP levels (cut-off value: 140 mm Hg), we found significant differences in SMMSE scores and plasma angiotensin IV concentrations of the groups. A negative correlation between SBP and SMMSE scores and strong linear correlations among angiotensin peptides levels were determined. The relationship found between SBP and SMMSE in the present study was compatible with the literature. Our 33 patients were using at least one angiotensin II receptor blocker (ARB). Regarding AT1 receptor blockage, the significant association between higher SMMSE scores and increased angiotensin peptides may support a finding that ARBs prevent dementia and improve cognitive function. Further larger studies are needed to confirm and prove the relation of RAAS biochemical parameters with cognitive function.

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Published

2017-03-10

How to Cite

Sen, S., Gürel, N., Ufuktepe, B., Özünal, Z. G., Büyüklü, Çagla, & Üresin, Y. (2017). Evaluating the relationship of blood pressure, plasma angiotensin peptides and aldosterone with cognitive functions in patients with hypertension. EXCLI Journal, 16, 245–255. https://doi.org/10.17179/excli2016-725

Issue

Vol. 16 (2017)

Section

Original articles

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