S0483 Cytokine Gene Polymorphisms in Irritable Bowel Syndrome vs Inflammatory Bowel Disease: A Network Meta-Analysis
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Résumé
INTRODUCTION: Cytokines are imbalanced in irritable bowel syndrome (IBS) and polymorphisms of cytokine-encoding genes may alter the risk of developing IBS. Whether IBS and inflammatory bowel disease (IBD), including ulcerative colitis (UC) and Crohn’s disease (CD), are separate entities or are on a spectrum with overlap is a question which has not been sufficiently explored. This study aimed to understand whether cytokine gene polymorphisms which are observed in IBS are also associated with IBD. METHODS: We designed a network meta-analysis to compare the distribution of three cytokine gene polymorphisms that have been more frequently studied in IBS and IBD: IL-10 (-1082GA), IL6 (-174GC), and TNF-α (-308GA). PubMed and Embase were searched for studies on the distribution of these polymorphisms in IBS and IBD vs. control. NetMetaXL (CADTH, Ottawa, Canada) was used for conducting this Bayesian network meta-analysis. Vague prior <0.5 suggested lower heterogeneity where fixed effects model was used. Odds ratio (OR) with 95% credible intervals [95% Cr.I.]. was used for the comparisons. RESULTS: Ten studies on IBS vs. controls, one on IBS vs. IBD vs. controls, and thirty-nine comparing IBD vs. controls, were included. The high producer IL-10 (-1082GG) genotype was less frequent in IBS vs. the three other groups: Controls 0.66 [0.50–0.88], UC 0.66 [0.47–0.91], and CD 0.72 [0.52–0.98]; while the intermediate producer IL-10 (-1082GA) was more frequently observed in IBS vs. Controls and UC. When comparing the low producer IL-10 (-1082AA) genotype in IBS with either IBD groups or Controls, no significant difference was observed, while CD had a lower frequency of IL-10 (-1082AA) vs. Controls. The high producer TNF-α (-308AA) was similarly distributed in IBS vs. other groups and was less frequent in Controls vs. UC: 0.68 [0.46–0.99]. TNF-α (-308 GG and GA) was similar among the study groups. IL6 (-174GC) was less frequent in IBS vs. CD: 0.73 [0.55–0.98]; and in UC vs. CD: 0.69 [0.53–0.89]. The high producer IL6 (-174GG) was less frequent in CD vs. UC: 0.73 [0.56–0.95]; while no difference was observed in IBS vs. other groups. CONCLUSION: IL-10 (-1082GA) has a more prominent role than TNF-α (-308GA) and IL6 (-174GC) in the pathogenesis of IBS and may distinguish IBS from IBD. There is a shift toward high producer pro-inflammatory TNF-α (-308AA) and IL6 (-174GG) in UC, distinguishing it from the other groups.
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Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,002 | 0,001 |
| Bibliométrie | 0,000 | 0,001 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,001 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,001 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle