Document Detail


Characteristic features of in vivo skin microvascular reactivity in CADASIL.
MedLine Citation:
PMID:  16788714     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
CADASIL (Cerebral Autosomal Dominant Arteriopathy with Subcortical Infarcts and Leukoencephalopathy) is caused by mutations in the Notch3 receptor expressed at the surface of vascular smooth muscle cells. The functional consequences of the disease at the peripheral microcirculation level are incompletely elucidated. In this study, we aimed to assess, in vivo, the endothelium-dependent and independent vasodilation of the skin microvasculature in CADASIL patients. Twenty-three affected subjects were compared with 23 gender and age-matched controls. The brachial artery endothelium-dependent and endothelium-independent vasodilation were assessed after forearm cuff occlusion and nitroglycerin administration. Skin vasoreactivity to transcutaneous administration of acetylcholine and sodium nitroprussiate, and after postocclusive hyperemia were measured by Laser Doppler flowmetry. The maximum changes in the diameter of the brachial artery after the cuff release or after nitroglycerin administration did not differ between patients and controls. With iontopheresis, only the peak value of the dose response was found decreased in normocholesterolemic patients after nitroprussiate administration. The postocclusive test revealed a large increase of the time to peak value and whole duration of the hyperemic response in CADASIL patients. The results of this study show that the skin vasoreactivity is altered in CADASIL. Particularly, the kinetics of reactive hyperemia after cuff occlusion is dramatically changed with a lengthened and delayed response. This characteristic pattern may be related to the specific ultrastructural modifications related to Notch3 gene mutations involving smooth muscle cells in the microvasculature.
Authors:
Claire Gobron; Katayoun Vahedi; Eric Vicaut; Olivier Stucker; Elisabeth Laemmel; Nathalie Baudry; Marie Germaine Bousser; Hugues Chabriat
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2006-06-21
Journal Detail:
Title:  Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism     Volume:  27     ISSN:  0271-678X     ISO Abbreviation:  J. Cereb. Blood Flow Metab.     Publication Date:  2007 Feb 
Date Detail:
Created Date:  2007-01-23     Completed Date:  2007-09-17     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8112566     Medline TA:  J Cereb Blood Flow Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  250-7     Citation Subset:  IM    
Affiliation:
Department of Neurology, CHU Lariboisière, Assistance Publique des Hôpitaux de Paris, Paris, France.
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MeSH Terms
Descriptor/Qualifier:
Adult
Aged
Brachial Artery / physiology
CADASIL / physiopathology*
Dose-Response Relationship, Drug
Female
Humans
Hyperemia / physiopathology
Magnetic Resonance Imaging
Male
Microcirculation / physiology
Middle Aged
Nitroprusside / pharmacology
Regional Blood Flow / physiology
Skin / blood supply*
Vasodilation / physiology
Vasodilator Agents / pharmacology
Chemical
Reg. No./Substance:
0/Vasodilator Agents; 15078-28-1/Nitroprusside

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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