53 citations
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May 2010 in “Journal of Cellular Physiology” This study found that mice lacking the Vitamin D receptor showed disrupted hair follicle cycling, which was partially restored with hedgehog signaling pathway activation, suggesting a role for this pathway in follicle regulation independent of vitamin D.
March 2025 in “Clinical Cosmetic and Investigational Dermatology” In this study, researchers found that the "U" allele of the Tru9I variant may be associated with low vitamin D levels and altered VDR gene activity in alopecia areata patients, while the "u" allele might have a protective role against developing the condition.
March 2024 in “Skin research and technology” This study found that CRP levels were elevated in alopecia areata patients, with an inverse linear association between serum vitamin D and CRP levels specifically noted in ophiasis AA.
119 citations
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October 1998 in “Endocrinology” This study found that normalizing mineral ion levels in vitamin D receptor-ablated mice prevented hyperparathyroidism, rickets, and osteomalacia, but alopecia persisted, indicating a separate role for the receptor in hair growth.
January 2025 in “International Journal of Molecular Sciences” This study showed that vitamin D receptor gene-deficient rats exhibit hair loss and skin abnormalities due to differences in gene and protein expression patterns, while ligand-independent VDR action is crucial for normal hair cycle maintenance and skin formation.