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Title: Loss of soluble guanylate cyclase, the major nitric oxide receptor, leads to moyamoya and achalasia      
dateReleased:
06-19-2014
description:
Background: Moyamoya is a cerebrovascular condition of unknown mechanism characterized by a progressive stenosis of the terminal part of the internal carotid arteries (ICA) and the compensatory development of abnormal “moyamoya” vessels. It leads to ischemic and hemorrhagic stroke. We describe a novel autosomal recessive disease leading to severe moyamoya and early onset achalasia and report its cause in 3 unrelated families. Methods: We used a combination of genetic linkage and exome sequencing in 2 consanguineous to identify rare shared variants. Sanger sequencing of GUCY1A3, the sole gene mutated in both families, was then conducted in the third family. Platelets from one of the patients and controls were used to carry out functional studies. Results: Homozygous mutations of GUCY1A3 gene encoding the alpha1 subunit of soluble guanylate cyclase (sGC), the major receptor for Nitric Oxide (NO), were identified in all 3 families. Platelet analysis showed a complete loss of the mutated protein and showed an unexpected stimulatory role of sGC within platelets. Conclusion: The NO/sGC/cGMP pathway is a major pathway controlling vascular smooth muscle (VSMC) relaxation, vascular tone and vascular remodeling. Our data suggest that alterations of this pathway may lead to an abnormal vascular remodeling process in sensitive vascular areas with low blood A total of 17 samples (8 affected and 9 unaffected) were used for this study. Linkage analysis was performed in a single informative consanguine family composed of 2 unaffected parents, 4 affected siblings and 3 unaffected siblings. Two affected samples in two different families were used for the exome sequencing analysis and results were compared to 20 control exomes (in-house exomes from IntegraGen, Evry, France) and 8 HapMap exomes. All samples were used for Sanger Sequencing confirmation.
privacy:
not applicable
aggregation:
instance of dataset
ID:
E-GEOD-48099
refinement:
raw
alternateIdentifiers:
48099
keywords:
functional genomics
dateModified:
06-29-2014
availability:
available
types:
gene expression
name:
Homo sapiens
ID:
A-AFFY-107
name:
Affymetrix GeneChip Human Mapping 250K Array Nsp [Mapping250K_Nsp]
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-48099/E-GEOD-48099.raw.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ebi.ac.uk/arrayexpress/files/E-GEOD-48099/E-GEOD-48099.processed.1.zip
storedIn:
ArrayExpress
qualifier:
gzip compressed
format:
TXT
accessType:
download
authentication:
none
authorization:
none
accessURL: https://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE48099
storedIn:
Gene Expression Omnibus
qualifier:
not compressed
format:
HTML
accessType:
landing page
primary:
true
authentication:
none
authorization:
none
abbreviation:
EBI
homePage: http://www.ebi.ac.uk/
ID:
SCR:004727
name:
European Bioinformatics Institute
homePage: https://www.ebi.ac.uk/arrayexpress/
ID:
SCR:002964
name:
ArrayExpress
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