ArticleClinical nutrition ESPEN2022
Genetic factors help explain the variable responses of young children with cystic fibrosis to vitamin D supplements.
Article in Clinical nutrition ESPEN, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 11 citations in OpenAlex.
- Genetic Variants Influencing Individual Vitamin D Status.Nutrients · 2025Review
- Article
- The Frequency and Potential Implications of HFE Genetic Variants in Children With Cystic Fibrosis.Pediatric pulmonology · 2025Article
- Understanding the Genetic Architecture of Vitamin Status Biomarkers in the Genome-Wide Association Study Era: Biological Insights and Clinical Significance.Advances in nutrition (Bethesda, Md.) · 2024Review
- Polymorphisms of the Vitamin D Binding Protein (VDBP) and Free Vitamin D in Patients with Cystic Fibrosis.Nutrients · 2024Article
- Vitamin D status and variable responses to supplements depend in part on genetic factors in adults with cystic fibrosis.Journal of cystic fibrosis : official journal of the European Cystic Fibrosis Society · 2024Article
- Impact of intrinsic and extrinsic risk factors on early-onset lung disease in cystic fibrosis.Pediatric pulmonology · 2023Article
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Authors and funding
10 authors at 1 institution in 1 country.
Funding
Abstract
BACKGROUND &
aimsChildren with cystic fibrosis (CF) are susceptible to fat-soluble vitamin deficiencies unless supplemented, but even large doses of vitamin D may not prevent low 25-hydroxyvitamin D (25OHD) concentrations. The explanation for these vitamin D non-responders has been elusive. We utilized data from whole genome sequencing (WGS) to test the hypothesis that genetic variations predict responsiveness to vitamin D supplementation in a prospective cohort study of children with CF in the first 3 years of life.
methodsOne hundred and one infants born during 2012-2017 and diagnosed with CF through newborn screening were studied. Serum 25OHD concentrations and vitamin D supplement doses were assessed during early infancy and annually thereafter. WGS was performed, the resultant variant calling files processed, and the summary statistics from a recent genome-wide association study were utilized to construct a polygenic risk score (PRS) for each subject.
resultsOverall, the prevalence of vitamin D insufficiency (<30 ng/mL) was 21% in the first 3 years of life. Among the 70 subjects who always adhered to vitamin D supplement doses recommended by the US CF Foundation guidelines, 89% were responders (achieved vitamin D sufficiency) by 3 years of age, while 11% were transient or non-responders. Multiple regression analysis revealed that PRS was a significant predictor of 25OHD concentrations (p < 0.001) and the likelihood of being an earlier responder in the first 3 years of life (p < 0.01). A limited SNP analysis revealed variants in four important genes (GC, LIPC, CYP24A1, and PDE3B) that were shown to be associated with 25OHD concentrations and vitamin D responder status. Other determinants included vitamin D supplement dose, season at 25OHD measurement, and pancreatic functional status.
conclusionsApplying WGS in conjunction with utilizing a PRS approach revealed genetic variations that partially explain the unresponsiveness of some children with CF to vitamin D supplementation. Our findings suggest that a nutrigenomics strategy could help promote personalized treatment in CF.
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