NOD2/CARD15 polymorphisms (P268S, IVS8+158, G908R, L1007fs, R702W) among Kuwaiti patients with Crohn's disease

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Background: Nucleotide-binding oligomerization domain-containing two ( NOD2 / CARD15 ) gene polymorphisms are implicated in the pathogenesis of Crohn's disease (CD). Aim: To describe the allelic frequency of NOD2 / CARD15 gene variants among Kuwaiti patients with CD and investigate potential genotype/phenotype associations. Methods: Adult Kuwaiti citizens with an established diagnosis of CD and healthy controls were enrolled from October 2018 to May 2020. Three common NOD2 / CARD15 polymorphisms (R702W, G908R, and L1007fs) and P268S and IVS8 +158 polymorphisms were screened by polymerase chain reaction/restriction analysis length polymorphism (PCR/RFLP). Results: Ninety adult Kuwaiti patients with CD and 210 healthy subjects (as controls) were recruited. P268S, IVS8 +158 , G908R, and R702W minor alleles were identified in 38.9%, 21.1%, 12.2%, and 4.4% of CD patients, respectively. NOD2 / CARD15 polymorphisms coexisted in 35 healthy controls (16.7%) and 21 CD patients (23.3%). Individuals with either a single or multiple polymorphism were approximately two times more likely to have CD than those with no polymorphism. Patients with multiple polymorphisms had significantly more stricturing and penetrating disease. Conclusion: NOD2 / CARD15 gene polymorphisms were significantly associated with an increased risk of disease and aggressive phenotypes among the Kuwaiti CD population.

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