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NFKBIZ in Psoriasis: Assessing the association with gene polymorphisms and report of a new transcript variant
Pablo Coto-Segura1, Leire Gonzalez-Lara2, Juan Gómez3
1Dermatología, Hospital Universitario Central Asturias, Oviedo, Spain; Dept Medicine, Universidad Oviedo, Oviedo, Spain.
Abstract:
The IκBζ protein (NFKBIZ gene) is a nuclear inhibitor of NF-κB and plays an important role in the pathogenesis of Psoriasis (Psor). We sought to determine whether common NFKBIZ variants were associated with the risk of developing Psor. A total of 392 patients and 336 controls were genotyped for a common intron 10 indel that could affect pre-mRNA splicing. We found a significantly higher frequency of the insertion among the cw6-positive patients (p=0.01). Cw6-positive+intron 10 ins/ins were significantly more frequent in the patients (OR=3.61). The analysis of the cDNA from leukocytes showed a NFKBIZ transcript lacking exon 10, present in all the tested samples. This new alternative transcript lacks a domain predicted to interact with the NFKB1/p50 protein. Functional studies to define the effect of this alternative transcript on the regulation of the NF-κB pathway are necessary.
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