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29 November 2016 : Clinical Research  

Is Nasal Polyposis Related to Levels of Serum Vitamin D and Vitamin D Receptor Gene Expression?

Omer Erdag1ABCE, Mahfuz Turan1ADEF*, Rıfkı Ucler2CF, Mehmet Berkoz3DF, Mehmet Fatih Garca1F, Nazım Bozan1F, Ahmet Faruk Kıroglu1F, Hakan Cankaya1DF

DOI: 10.12659/MSM.898410

Med Sci Monit 2016; 22:4636-4643

Abstract

BACKGROUND: Nasal polyposis (NP) is the most frequent cause of nasal masses. Despite considerable research on the subject, its etiology has not been fully elucidated, and effective treatment methods have not been developed. Some etiological factors causing low or high expression of genes in genetically predisposed individuals may play a role in the pathogenesis of the disease. The purpose of this study was to assess the relation between levels of vitamin D receptor (VDR) gene expression and serum vitamin D with NP.

MATERIAL AND METHODS: The study included 46 subjects with NP (NP group) and 40 volunteers (control group). Nasal polyp tissue samples were taken from the NP group and nasal mucosa samples were taken from the control group. Levels of VDR gene expression in the tissue samples were assessed using the real-time polymerase chain reaction (RT-PCR) method.

RESULTS: Mean serum 25(OH)D levels were 13.38±14.08 ng/ml in the NP group and 10.57±6.44 ng/ml in the control group (p=0.249). VDR gene expression was present in 17.5% of the NP group and 3.3% of the control group, and the difference between the 2 groups was statistically significant (likelihood ratio χ²=3.887; p=0.049).

CONCLUSIONS: This is the first study to assess levels of VDR gene expression in subjects with NP. Our results suggest that VDR gene expression may be associated with the pathogenesis or progression of NP.

Keywords: Adolescent, Case-Control Studies, Gene Expression, Nasal Mucosa, Nasal Polyps - genetics, Prospective Studies, Receptors, Calcitriol - metabolism, Vitamin D - blood

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750