Genetic influence on circulating vitamin D among Saudi Arabians

Area of Science:

• Genetics
• Endocrinology
• Nutritional Science

Background:

• Vitamin D deficiency is a widespread health concern, particularly in the Saudi Arabian population.
• Single nucleotide polymorphisms (SNPs) are common genetic variations that may influence vitamin D metabolism and serum levels.
• Understanding the genetic basis of vitamin D status is crucial for targeted public health interventions.

Purpose of the Study:

• To investigate the association between common single nucleotide polymorphisms (SNPs) and serum 25-hydroxyvitamin D (25OHD) levels in a Saudi Arabian cohort.
• To identify specific genetic variants that contribute to vitamin D deficiency or insufficiency in the region.

Main Methods:

• A cross-sectional observational study involving 283 subjects from the Eastern province of Saudi Arabia.
• Blood samples were analyzed for serum 25-OHD levels and genotyped for SNPs in the vitamin D receptor (VDR), Cytochrome P450 family 2 (CYP2R1), and Group-specific components (GC) genes.
• Statistical analysis was performed to determine the association between specific SNP alleles and vitamin D status.

Main Results:

• A high prevalence of vitamin D deficiency (87.6%) and insufficiency (7.7%) was observed.
• The GG allele of VDR rs2228570 was significantly associated with increased risk of vitamin D insufficiency and deficiency.
• Carriers of AG and GG alleles of CYP2R1 rs10741657, and the AC allele of GC rs4588, showed a significant risk of vitamin D deficiency.

Conclusions:

• Specific SNPs in the VDR (rs2228570), GC (rs4588), and CYP2R1 (rs10741657) genes are associated with an increased risk of vitamin D deficiency in the Saudi Arabian population.
• These genetic findings contribute to understanding the determinants of vitamin D status in this population.
• Further research can explore the clinical implications and potential therapeutic targets based on these genetic associations.