Molecular Biology Reports

, Volume 40, Issue 11, pp 6151–6162

Role of vitamin D receptor gene polymorphisms and serum 25-hydroxyvitamin D level in Egyptian female patients with systemic lupus erythematosus



Recently, several studies have demonstrated the role of vitamin D receptor (VDR) polymorphisms in the development of systemic lupus erythematosus (SLE). We aimed to evaluate VDR (ApaI, BsmI, and FokI) gene polymorphisms and haplotypes as a risk factors and/or activity markers for SLE, and whether they influence 25-hydroxyvitamin (25(OH) D) level. One hundred and seven SLE patients and 129 controls were enrolled in this study. Disease activity in SLE patients was assessed using Disease Activity Index. Polymorphisms of VDR gene were detected using polymerase chain reaction restriction fragment length polymorphism. Serum 25(OH) D levels were measured using ELISA. We found that ApaI AA genotype, BsmI B allele, Bb, BB genotypes, FokI F allele and FF genotype frequencies of VDR were increased in SLE group. There were significant associations of VDR ApaI AA, BsmI BB, and FokI FF genotypes with lupus nephritis and higher SLE activity scores. Moreover, serum 25(OH) D levels were increased in SLE patients carrying FokI ff genotype compared with patients carrying FF genotype. VDR haplotypes aBF and ABF were associated with SLE risk. The ABF haplotype was associated with higher SLE activity scores and lower serum 25(OH) D concentrations. We observed that the presence of leuko/lymphopenia, renal disorders, higher SLE activity scores and higher anti-dsDNA levels were accompanied by a significant decrease of serum 25(OH)D concentrations. We concluded that The VDR genes polymorphisms, haplotypes, and decreased 25(OH) D levels were associated with risk and more activity scores of SLE.


25-Hydroxyvitamin D ApaI polymorphism BsmI polymorphism FokI polymorphism Systemic lupus erythematosus Vitamin D Vitamin D receptor gene 


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Rheumatology and Rehabilitation Department, Faculty of MedicineZagazig UniversityZagazigEgypt
  2. 2.Medical Biochemistry Department, Faculty of MedicineZagazig UniversityZagazigEgypt

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