Vitamin D receptor gene polymorphisms in children with kidney stone disease

Area of Science:

• Genetics
• Pediatrics
• Nephrology

Background:

• Kidney stone disease (urolithiasis) has a complex cause involving genetic and environmental factors.
• Genetic predisposition plays a significant role, accounting for up to 60% of stone formation risk in relatives of patients.
• The vitamin D receptor (VDR) gene is a potential candidate for influencing kidney stone development.

Purpose of the Study:

• To investigate the association between specific vitamin D receptor (VDR) gene polymorphisms and the risk of kidney stone disease in Turkish children.
• To determine if VDR gene variations (ApaI, BsmI, TagI, Cdx2, FokI) correlate with urolithiasis, hypercalciuria, or hypocitraturia.

Main Methods:

• Genotyping for VDR gene polymorphisms (ApaI, BsmI, TagI, Cdx2, FokI) was performed using restriction enzyme digestion.
• Analyzed genotype and allele frequencies in 52 children with urolithiasis and 51 healthy controls.
• Compared frequencies between stone patients and controls, also considering subgroups with hypercalciuria and hypocitraturia.

Main Results:

• No statistically significant association was found between VDR gene polymorphisms (ApaI, BsmI, TagI, Cdx2, FokI) and the risk of kidney stone disease in the studied children.
• Allele and genotype frequencies of the investigated VDR polymorphisms did not differ significantly between children with urolithiasis and healthy controls.
• Subgroup analysis revealed no significant differences in VDR gene polymorphism frequencies among patients with hypercalciuria or hypocitraturia compared to controls.

Conclusions:

• The studied vitamin D receptor (VDR) gene polymorphisms (ApaI, BsmI, TagI, Cdx2, FokI) do not appear to be a significant risk factor for kidney stone disease in Turkish children.
• Further research may be needed to explore other genetic or environmental factors contributing to pediatric urolithiasis.