CGDS researchers and collaborators have published new findings on the genetic basis of vitamin D variability in adults with cystic fibrosis (CF). The study analyzed 25-hydroxyvitamin D (25OHD) levels alongside whole genome sequencing data from 80 adults to investigate why some patients remain vitamin D insufficient despite consistent supplementation.
Results showed that 30% of participants had 25OHD concentrations below the 30 ng/mL threshold, despite normal vitamin E levels. Polygenic risk scores (PRS) were significantly correlated with 25OHD status, indicating that common genetic variants contribute to differences in response to vitamin D therapy. These findings align with prior results in children and support a more personalized approach to supplementation in CF care.
Read the full study in Journal of Cystic Fibrosis: Vitamin D status and variable responses to supplements depend in part on genetic factors in adults with cystic fibrosis.