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Abanmi, Abdullah,Harthi, Fahad Al,Agla, Rokaiyah Al,Khan, Haseeb Ahmad,Tariq, Mohammad Korean Society for Biochemistry and Molecular Biol 2005 Journal of biochemistry and molecular biology Vol.38 No.3
Alanine at residue 73 (Ala-73) and aspartate at residue 9 (Asp-9) are characteristic to both Cw6 and Cw7 alleles of HLA-C gene and have been suggested as possible markers for psoriasis vulgaris (PsV). However, the results from various ethnic groups/populations are contradictory and inconclusive. In this study, an attempt has been made to examine the association between HLA-C (Ala-73 and Asp-9) and susceptibility to PsV among Saudi patients. Genomic DNA was extracted from 25 Saudi PsV patients and 75 control subjects. Polymerase chain reaction (PCR) was performed to amplify HLA-C sequences using earlier reported primers, C133P and C243PR. Sequence-specific primers were used to specifically detect nucleotide coding for Ala-73 and Asp-9 in all the subjects. The results showed significantly higher frequency of Asp-9 (84.0% versus 61.3%) in PsV patients as compared to controls (p < 0.05, 2-tailed Fisher's exact test). The frequencies of Ala-73 among PsV patients (92%) and controls (88%) did not differ significantly.