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Joint Bone Spine
Volume 79, n° 2
pages 124-128 (mars 2012)
Doi : 10.1016/j.jbspin.2011.07.006
accepted : 22 July 2011
PADI4 polymorphisms and related haplotype in rheumatoid arthritis patients
 

Somia H. Abd-Allah a, , Amal S. El-Shal a, Sally M. Shalaby a, Heba F. Pasha a, Amany M. Abou El-Saoud b, Amany R. El-Najjar b, Eman E. El-Shahawy b
a Medical Biochemistry Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt 
b Rheumatology and Rehabilitation Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt 

Corresponding author. Tel.: +20 1 21 60 75 90.
Abstract
Objective

To investigate whether peptidyl arginine deiminase type IV gene (PADI4) polymorphisms contribute to rheumatoid arthritis (RA) susceptibility in Egyptians, whether they influence disease severity and activity, and whether they affect anti-mutated citrullinated vimentin antibodies (anti-MCV) level.

Methods

Three PADI4 single nucleotide polymorphisms (SNPs) (PADI4-92, PADI4-96, and PADI4-102) were screened in 275 RA patients and 275 unaffected controls by polymerase chain reaction-based restriction fragment length polymorphism (PCR-RFLP) method. Serum anti-MCV levels were measured by enzyme-linked immunosorbent assay (ELISA).

Results

There were significant associations between RA susceptibility with the minor alleles of PADI4-92 and PADI4-102 [odds ratio (OD) and 95% confidence interval (CI) for the minor alleles of PADI4-92 and PADI4-102: 1.48 (1.17–1.88) and 2.05 (1.61–2.61) respectively] but not with PADI4-96 [OD and 95% CI for the C allele: 1.09 (0.86–1.39)]. PADI4 haplotypes 2 (GCC) and 3 (GCT) were also associated with RA susceptibility while PADI4 haplotypes 1 (CTC) may be protective against developing of this disease. A significant association was detected between PADI4 haplotypes and RA severity.

Conclusions

The PADI4 SNPs and haplotypes were associated with RA susceptibility, although no relation was observed between the PADI4 haplotypes and anti-MCV levels.

The full text of this article is available in PDF format.

Keywords : Rheumatoid arthritis, PADI4, Anti-MCV, Single nucleotide polymorphism

Abbreviations : RA, HLA-DRBI, PADI4, anti-CCP, anti-MCV




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