Cited by 107Renin-Angiotensin System StudiesNitric Oxide and Endothelin EffectsNeurological Disease Mechanisms and Treatments

Central Cardiovascular Circuits Contribute to the Neurovascular Dysfunction in Angiotensin II Hypertension

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Capone, Carmen, Faraco, Giuseppe, Peterson, Jeffrey R., Coleman, Christal, Anrather, Josef, Milner, Teresa A., Pickel, Virginia M., Davisson, Robin L. +1 more·2012·The Journal of Neuroscience

Abstract

Hypertension, a powerful risk factor for stroke and dementia, has damaging effects on the brain and its vessels. In particular, hypertension alters vital cerebrovascular control mechanisms linking neural activity to cerebral perfusion. In experimental models of slow-developing hypertension, free radical signaling in the subfornical organ (SFO), one of the forebrain circumventricular organs, is critical for the hormonal release and sympathetic activation driving the elevation in arterial pressure. However, the contribution of this central mechanism to the cerebrovascular alterations induced by hypertension remains uncertain. We tested the hypothesis that free radical production in the SFO is involved in the alterations in cerebrovascular regulation produced by hypertension. In a mouse model of gradual hypertension induced by chronic administration of subpressor doses of angiotensin II (AngII), suppression of free radicals in the SFO by overexpression of CuZn-superoxide dismutase (CuZnSOD) prevented the alteration in neurovascular coupling and endothelium-dependent responses in somatosensory cortex induced by hypertension. The SFO mediates the dysfunction via two signaling pathways. One involves SFO-dependent activation of the paraventricular hypothalamic nucleus, elevations in plasma vasopressin, upregulation of endothelin-1 in cerebral resistance arterioles and activation of endothelin type A receptors. The other pathway depends on activation of cerebrovascular AngII type 1 (AT1) receptors by AngII. Both pathways mediate vasomotor dysfunction by inducing vascular oxidative stress. The findings implicate for the first time the SFO and its efferent hypothalamic pathways in the cerebrovascular alterations induced by AngII, and identify vasopressin and endothelin-1 as potential therapeutic targets to counteract the devastating effects of hypertension on the brain.

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Crossref · 10.1523/jneurosci.6262-11.2012

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Authors
Capone, C., Faraco, G., Peterson, J. R., Coleman, C., Anrather, J., Milner, T. A., Pickel, V. M., Davisson, R. L., & Iadecola, C.
Affiliations
  • Weill Cornell Medicine (US)
  • Rockefeller University (US)
  • Cornell University (US)
Venue
The Journal of Neuroscience
Published
2012-04-04
Volume
32
Issue
14
Pages
4878-4886
ISSN
  • 0270-6474 (ISSN-L)
  • 1529-2401
OpenAlex
W2132051579
Cited by
106
References
67
Citations by year
2026: 4 · 2025: 9 · 2024: 7 · 2023: 2 · 2022: 10 · 2021: 4 · 2020: 8 · 2019: 10 · 2018: 8 · 2017: 8 · 2016: 5 · 2015: 11 · 2014: 5 · 2013: 13 · 2012: 2
FWCI
6.38
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroscience (publishedVersion, cc-by-nc-sa)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Heart, Lung, and Blood Institute (HL-96571, R01HL063887, HL98351, P01HL096571, R01HL098351)
  • National Institute of Neurological Disorders and Stroke (R01NS073666)
Topics
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Renin-Angiotensin System Studies
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Neuroscience › Neurology › Neurological Disease Mechanisms and Treatments
Keywords
subfornical organ, neurovascular coupling, cerebrovascular dysfunction, oxidative stress, Cu/Zn superoxide dismutase, paraventricular nucleus, vasopressin, endothelin-1, ETA receptor, angiotensin II type 1 receptor, somatosensory cortex, circumventricular organs, stroke risk
MeSH terms
Angiotensin II, Animals, Cerebrovascular Circulation, Endothelium, Vascular, Hypertension, Male, Mice, Inbred C57BL, Subfornical Organ, Reactive Oxygen Species, Gene Transfer Techniques, Receptor, Angiotensin, Type 1, Mice

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