Antibodies to saccharomyces cerevisiae in Crohn's disease: higher titers are associated with a greater frequency of mutant NOD2/CARD15 alleles and with a higher probability of complicated disease.
Inflamm Bowel Dis
; 13(2): 143-51, 2007 Feb.
Article
em En
| MEDLINE
| ID: mdl-17206688
ABSTRACT
BACKGROUND:
Both antibodies to Saccharomyces cerevisiae (ASCA) and carriage of two mutated NOD2/CARD15 alleles are associated with ileal Crohn's disease (CD) and complications requiring bowel surgery. We assessed the ASCA titer as a marker of CD clinical behavior.METHODS:
In a cross-sectional study, we phenotyped 117 unrelated CD patients. Titers (Units, U) of ASCA IgG and IgA were measured and patients were genotyped for three high-risk NOD2/CARD15 alleles. Multiple logistic regression and Cox regression analyses were used to assess the association of factors to CD phenotype and time to surgery.RESULTS:
ASCA seropositivity was associated with younger age at diagnosis, ileal disease, and complicated (stricturing or penetrating) behavior. There was a dose-response between the number of mutant NOD2/CARD15 alleles and the prevalence and titers of ASCA. The ASCA titer and tobacco use were associated with ileal disease independently of NOD2/CARD15 status. The ASCA titer (odds ratio (OR) 2.7 per 25 U, 95% confidence interval (CI) 1.5-46.7) and ileal disease were associated with stricturing/penetrating behavior, independently of NOD2/CARD15 status. Patients with ileal CD and ASCA titers of 41 U and 60 U needed 10 and 5 years of disease, respectively, to accumulate a 50% risk of complications.CONCLUSIONS:
ASCA+ patients had a greater frequency of mutant NOD2/CARD15 alleles. Nonetheless, higher ASCA titers were associated with higher probabilities of ileal CD and stricturing/penetrating behavior independently of NOD2/CARD15 status. Higher ASCA titers were associated with more rapid development of complications. This quantitative marker may prove useful in risk-stratifying patients to more aggressive antiinflammatory therapies.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Saccharomyces cerevisiae
/
Doença de Crohn
/
Proteína Adaptadora de Sinalização NOD2
/
Anticorpos Antifúngicos
/
Mutação
Tipo de estudo:
Observational_studies
/
Risk_factors_studies
Limite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Inflamm Bowel Dis
Assunto da revista:
GASTROENTEROLOGIA
Ano de publicação:
2007
Tipo de documento:
Article
País de afiliação:
Estados Unidos