Clinical, Cosmetic and Investigational Dermatology (Aug 2018)

Transforming growth factor-β1 gene polymorphism in psoriasis vulgaris

  • El-hadidi HH,
  • Hassan AS,
  • El-hanafy G,
  • Amr KS,
  • Abdelmesih SF,
  • Abdelhamid MF

Journal volume & issue
Vol. Volume 11
pp. 415 – 419

Abstract

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Heba H El-hadidi,1 Akmal S Hassan,1 Ghada El-hanafy,1 Khalda S Amr,2 Sameh F Abdelmesih,3 Mahmoud F Abdelhamid3 1Department of Dermatology, Kasr Al-Ainy University Hospitals, Cairo University, Giza, Egypt; 2Department of Molecular Genetics, National Research Center, Cairo, Egypt; 3Department of Dermatology, National Research Center, Cairo, Egypt Background: Increased transforming growth factor beta 1 (TGF-β1) in the epidermis and serum has been found in psoriatic patients. The mechanism for this increase remains unclear.Objective: To study the TGF-β1 gene polymorphism at codon 10 and its relation to psoriasis susceptibility in a sample of Egyptian patients.Materials and methods: This cross-sectional study involved 70 patients with psoriasis vulgaris and 100 age- and sex- comparable healthy volunteers as a control group. Genomic DNA was prepared from peripheral blood lymphocytes from all subjects using QIAamp DNA mini kit (QIAGEN Inc., Germany). The TGF-β1 polymorphism was genotyped by PCR-based restricted fragment length polymorphism (PCR-RFLP) analysis. Amplification of codon 10, located in exon 1 of TGFβ1 gene was done through PCR reaction using gene-specific primers.Results: Statistically significant difference was found between psoriasis patient and controls as regards TGF-β1 (T869C) polymorphism (P=0.045). The presence of TT genotype was associated with a 3-fold risk of psoriasis compared to CC genotype (P=0.016, OR: 3.13 95% CI: 1.24–7.88). T allele was significantly more frequent in psoriasis patients (P=0.017). TGF-β1 gene mutation was significantly higher among psoriasis patients with positive family history (P=0.007).Conclusion: TGF-β1 gene polymorphism at codon 10 (T869C) is significantly associated with susceptibility to psoriasis in Egyptian patients. This polymorphism is more common in patients with a positive family history of psoriasis. Keywords: psoriasis, TGF-β1, gene polymorphism

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