Deletion of late cornified envelope genes, LCE3C_LCE3B-del, is not associated with psoriatic arthritis in Tunisian patients.

A deletion of two genes from the late cornified envelope (LCE), LCE3B and LCE3C within epidermal differentiation complex on chromosome 1 was shown to be associated with both psoriasis and psoriatic arthritis (PsA) in several populations. To assess whether this deletion may contribute to the genetic predisposition to PsA in Tunisia, a total of 73 patients with PsA and 120 healthy matched controls were screened for the deletion, LCE3C_LCE3B-del, and its tag SNP, rs4112788. We also evaluated a possible relationship between PSORS1 and LCE3C_LCE3B-del through genotyping two proxy markers to HLA-C (rs12191877 and rs2073048).

Family-based association study in Tunisian familial psoriasis.

Background: The pathogenesis of all forms of psoriasis remains obscure. Segregation analysis and twin studies together with ethnic differences in disease frequency all point to an underlying genetic susceptibility to psoriasis, which is both complex and likely to reflect the action of a number of genes.

Materials And Methods: In the present study, we performed a family-based association study, and a transmission dysequilibrium test using the PLINK program, in a set of seven Tunisian multiplex families using a panel of 96 single-nucleotide polymorphisms localized in several regions across the genome.

Association analysis of LCE3C-LCE3B deletion in Tunisian psoriatic population.

An association between a common deletion comprising the late cornified envelope LCE3B and LCE3C genes (LCE3C_LCE3B-del) and psoriasis has been reported in Caucasian and Asian populations. To investigate whether this deletion plays a role in the genetic of psoriasis in Tunisian population, we determined the LCE3C_LCE3B-del genotype in 180 Ps patients and 208 healthy controls from different regions of Tunisia. The LCE3B and LCE3C gene variant was determined in the patients through PCR amplification and the SPSS software package.