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Genes and metabolic pathway of sarcoidosis: identification of key players and risk modifiers
Mihailo I Stjepanovic1,2, Violeta Mihailovic-Vucinic1,2, Vesna Spasovski3
1Clinic of Pulmonology, Clinical Center of Serbia, Belgrade, Serbia.
Introduction:
Sarcoidosis is a rare multisystem granulomatous disease with unknown etiology. The interplay of vitamin D deficiency and genetic polymorphisms in genes coding for the proteins relevant for metabolism of vitamin D is an important, but unexplored area. The aim of this study was to investigate the association between single nucleotide polymorphisms (SNPs) in CYP2R1 (rs10741657), CYP27B1 (rs10877012), DBP (rs7041; rs4588), and VDR (rs2228570) genes and sarcoidosis, as well as the association between these SNPs and 25(OH)D levels in sarcoidosis patients.
Material And Methods:
For that purpose we genotyped 86 sarcoidosis patients and 50 healthy controls using the PCR-RFLP method.
Results:
Subjects carrying the CC genotype of CYP27B1 rs10877012 have 10 times lower odds of suffering from sarcoidosis. Moreover, DBP rs4588 AA genotype was shown to be a susceptibility factor, where carriers of this genotype had eight times higher odds for developing sarcoidosis. In addition, the A allele of the DBP gene (rs4588) was associated with lower levels of 25(OH)D in sarcoidosis patients.
Conclusions:
These results suggest that patients with vitamin D deficiency should be regularly tested for genetic modifiers that are related to sarcoidosis in order to prevent development of serious forms of sarcoidosis.
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