Differential restoration of functional hyperemia by antihypertensive drug classes in hypertension-related cerebral small vessel disease

Dementia resulting from small vessel diseases (SVDs) of the brain is an emerging epidemic for which there is no treatment. Hypertension is the major risk factor for SVDs, but how hypertension damages the brain microcirculation is unclear. Here, we show that chronic hypertension in a mouse model prog...

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Veröffentlicht in:The Journal of clinical investigation 2021-09, Vol.131 (18)
Hauptverfasser: Koide, Masayo, Harraz, Osama F, Dabertrand, Fabrice, Longden, Thomas A, Ferris, Hannah R, Wellman, George C, Hill-Eubanks, David C, Greenstein, Adam S, Nelson, Mark T
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container_issue 18
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container_title The Journal of clinical investigation
container_volume 131
creator Koide, Masayo
Harraz, Osama F
Dabertrand, Fabrice
Longden, Thomas A
Ferris, Hannah R
Wellman, George C
Hill-Eubanks, David C
Greenstein, Adam S
Nelson, Mark T
description Dementia resulting from small vessel diseases (SVDs) of the brain is an emerging epidemic for which there is no treatment. Hypertension is the major risk factor for SVDs, but how hypertension damages the brain microcirculation is unclear. Here, we show that chronic hypertension in a mouse model progressively disrupts on-demand delivery of blood to metabolically active areas of the brain (functional hyperemia) through diminished activity of the capillary endothelial cell inward-rectifier potassium channel, Kir2.1. Despite similar efficacy in reducing blood pressure, amlodipine, a voltage-dependent calcium-channel blocker, prevented hypertension-related damage to functional hyperemia whereas losartan, an angiotensin II type 1 receptor blocker, did not. We attribute this drug class effect to losartan-induced aldosterone breakthrough, a phenomenon triggered by pharmacological interruption of the renin-angiotensin pathway leading to elevated plasma aldosterone levels. This hypothesis is supported by the finding that combining losartan with the aldosterone receptor antagonist eplerenone prevented the hypertension-related decline in functional hyperemia. Collectively, these data suggest Kir2.1 as a possible therapeutic target in vascular dementia and indicate that concurrent mineralocorticoid aldosterone receptor blockade may aid in protecting against late-life cognitive decline in hypertensive patients treated with angiotensin II type 1 receptor blockers.
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source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central; Alma/SFX Local Collection
subjects Amlodipine - therapeutic use
Angiotensin II Type 1 Receptor Blockers - administration & dosage
Angiotensin II Type 1 Receptor Blockers - therapeutic use
Animals
Antihypertensive Agents - administration & dosage
Antihypertensive Agents - therapeutic use
Antihypertensive drugs
Blood circulation
Cerebral Small Vessel Diseases - drug therapy
Cerebral Small Vessel Diseases - etiology
Cerebral Small Vessel Diseases - physiopathology
Cerebrovascular Circulation - drug effects
Cerebrovascular Circulation - physiology
Cerebrovascular disease
Complications and side effects
Concise Communication
Dementia, Vascular - drug therapy
Dementia, Vascular - etiology
Dementia, Vascular - physiopathology
Disease Models, Animal
Drug therapy
Drug Therapy, Combination
Eplerenone - administration & dosage
Eplerenone - therapeutic use
Health aspects
Heart Disease Risk Factors
Humans
Hyperemia - drug therapy
Hyperemia - physiopathology
Hypertension
Hypertension - complications
Hypertension - drug therapy
Losartan - administration & dosage
Losartan - therapeutic use
Male
Mice
Microvessels - drug effects
Microvessels - physiopathology
Pharmacology, Experimental
Potassium Channels, Inwardly Rectifying - drug effects
Potassium Channels, Inwardly Rectifying - physiology
Renin-Angiotensin System - drug effects
Renin-Angiotensin System - physiology
title Differential restoration of functional hyperemia by antihypertensive drug classes in hypertension-related cerebral small vessel disease
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