RGD Reference Report - Polymorphisms in the endothelial nitric oxide synthase gene are associated with Behcet's disease. - Rat Genome Database

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Polymorphisms in the endothelial nitric oxide synthase gene are associated with Behcet's disease.

Authors: Karasneh, JA  Hajeer, AH  Silman, A  Worthington, J  Ollier, WE  Gul, A 
Citation: Karasneh JA, etal., Rheumatology (Oxford). 2005 May;44(5):614-7. Epub 2005 Feb 10.
RGD ID: 7775048
Pubmed: PMID:15705632   (View Abstract at PubMed)
DOI: DOI:10.1093/rheumatology/keh561   (Journal Full-text)

OBJECTIVE: Reduced plasma nitric oxide (NO) levels in Behcet's disease (BD) patients have been implicated in the development of the endothelial abnormalities and thrombotic complications occurring in these patients. This study investigated the association of the endothelial NO Synthase (eNOS) gene polymorphisms with BD. METHODS: A case-control study was carried out using 193 unrelated Turkish BD patients and 106 healthy controls. All individuals were genotyped by PCR for two single-nucleotide polymorphisms (SNPs): -786 T-->C in the promoter region and 894 G-->T in exon 7 (Glu298Asp). A variable number of tandem repeats (VNTR) polymorphism in intron 4 was also investigated. RESULTS: The VNTR polymorphism was associated with BD, detected by an increased frequency of the b allele (odds ratio = 1.9, P = 0.0069) and b/b genotype (odds ratio = 2.2, P = 0.002) in patients. After the stratification of cases according to the family history, a significant difference between familial cases and controls in the -786 SNP was observed, with an increase in the frequency of the T allele (odds ratio = 2.5, P = 0.0016) and T/T genotype (odds ratio = 2.5, P = 0.0085), and the association of the VNTR polymorphism with BD became stronger. The -786*T and VNTR*b alleles were in linkage disequilibrium (D' = 0.65, P <0.0001), and the number of individuals homozygous for the -786*T/VNTR*b haplotype was significantly increased in the patients. CONCLUSIONS: eNOS gene polymorphisms are associated with BD, which might contribute to the reduced NO activity observed in BD patients.



RGD Manual Disease Annotations    Click to see Annotation Detail View

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
NOS3HumanBehcet's disease susceptibilityIAGP DNA:snp more ...RGD 
Nos3RatBehcet's disease susceptibilityISONOS3 (Homo sapiens)DNA:snp more ...RGD 
Nos3MouseBehcet's disease susceptibilityISONOS3 (Homo sapiens)DNA:snp more ...RGD 

Phenotype Annotations    Click to see Annotation Detail View

Manual Human Phenotype Annotations - RGD

Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
NOS3HumanGenital ulcers susceptibilityIAGP DNA:snp more ...RGD 
NOS3HumanOral ulcer susceptibilityIAGP DNA:snp more ...RGD 
NOS3HumanUveitis susceptibilityIAGP DNA:snp more ...RGD 
Objects Annotated

Genes (Rattus norvegicus)
Nos3  (nitric oxide synthase 3)

Genes (Mus musculus)
Nos3  (nitric oxide synthase 3, endothelial cell)

Genes (Homo sapiens)
NOS3  (nitric oxide synthase 3)


Additional Information