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Vitamin D receptor gene polymorphism in children with urinary tract infection
Sule Aslan1, Ipek Akil, Gulcin Aslan
1Department of Pediatric Nephrology, Celal Bayar University, Manisa, Turkey.
Insights
Vitamin D receptor (VDR) gene variations influence susceptibility to urinary tract infections (UTI) in children. The FokI polymorphism significantly increases UTI risk, while ApaI may offer protection.
Area of Science:
- Genetics
- Immunology
- Pediatrics
Background:
- Vitamin D receptor (VDR) alleles impact infection susceptibility.
- Urinary tract infections (UTI) are common in children and can lead to renal scarring.
Purpose of the Study:
- To investigate the association between VDR gene polymorphisms and UTI in children.
- To determine if specific VDR genotypes influence UTI risk or protection.
Main Methods:
- Case-control study involving 92 children with UTI and 105 controls.
- Analysis of VDR gene polymorphisms: BsmI, FokI, ApaI, and TaqI.
Main Results:
- FokI polymorphism, specifically the ff genotype, showed a significant 3.94-fold increased risk of UTI (p < 0.01).
- ApaI polymorphism was significantly more prevalent in the control group, suggesting a protective role (p < 0.01).
- BsmI and TaqI polymorphisms did not show statistically significant associations with UTI risk.
Conclusions:
- VDR gene polymorphisms, particularly FokI and ApaI, are associated with UTI susceptibility and potentially renal scar formation in children.
- These findings align with vitamin D's role in modulating immune responses to infections.
Abstract:
It is known that small alterations leading to different vitamin D receptor (VDR) alleles affect resistance or susceptibility to infections. In this study, we examined VDR gene polymorphisms in urinary tract infections (UTI), which are common and an important cause of morbidity in children and subsequently of renal scar formation. We evaluated 92 patients diagnosed with UTI and 105 children without prior history of UTI as a control group. The VDR gene polymorphisms BsmI, FokI, ApaI, and TaqI were evaluated in patients and controls. BsmI polymorphism genotype distribution was similar between groups. There was a significant difference between groups for FokI (p =0 < 001); for the ff genotype, the risk of UTI was significantly increased (p < 0.01) ,at 3.94 times higher (odds ratio = 3.94; 95% confidence interval 1.71-9.09). ApaI polymorphism was significantly increased in the control group (p < 0.01) and evaluated as a protective factor. Comparing the TaqI genotype between groups, there was no statistically significant difference, but in both Tt and tt genotypes, there was minimal increased risk of UTI. The results of this study suggest that VDR gene polymorphisms can be important for susceptibility to UTI and renal scar formation. Association between VDR polymorphisms and UTI is in accordance with the understanding of how vitamin D modulates the immune response against infections.
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