[A young girl with recurrent calculosis and hypercalcemia]
Federica Di Maio1, Matteo Vittori2, PierFrancesco Bassi2
1UOC di Nefrologia Fondazione Policlinico Universitario A. Gemelli, Università Cattolica del Sacro Cuore, Roma, Italy.
Summary
Mutations in the CYP24A1 gene impair vitamin D metabolism by affecting 25-OH-D-24-hydroxylase activity. This genetic defect can lead to serious conditions like hypercalcemia and kidney stones.
Area of Science:
- Biochemistry
- Genetics
- Nephrology
Background:
- The enzyme 25-OH-D-24-hydroxylase, encoded by the CYP24A1 gene, is crucial for vitamin D metabolism.
- Dysfunction in this enzyme can disrupt calcium homeostasis and lead to various health issues.
Observation:
- A clinical case involving a young woman presenting with recurrent kidney stones, hypercalcemia, and hypercalciuria was analyzed.
- These symptoms are indicative of a potential underlying metabolic disorder.
Findings:
- The patient's condition was linked to a deficiency in 25-OH-D-24-hydroxylase activity.
- Genetic analysis revealed a biallelic mutation in the CYP24A1 gene, confirming the enzymatic deficiency.
Implications:
- This case highlights the significant role of the CYP24A1 gene in maintaining vitamin D and calcium balance.
- Understanding these mutations is vital for diagnosing and managing related metabolic disorders, including nephrolithiasis and nephrocalcinosis.
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