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Implementing Patch Clamp and Live Fluorescence Microscopy to Monitor Functional Properties of Freshly Isolated PKD Epithelium
Published on: September 1, 2015
CYP24A1 and kidney disease.
Martin Petkovich1, Glenville Jones
1Division of Cancer Biology and Genetics, Cancer Research Institute, Department of Biochemistry, Queen's University, Kingston, Ontario, Canada. martin.petkovich@cytochroma.com
Current Opinion in Nephrology and Hypertension
|May 26, 2011
Summary
In chronic kidney disease (CKD), elevated phosphate and FGF-23 increase CYP24A1, worsening vitamin D deficiency. Blocking CYP24A1 may restore vitamin D status and improve CKD complications.
Area of Science:
- Biochemistry
- Pathophysiology
- Nephrology
Background:
- Chronic kidney disease (CKD) is associated with elevated serum phosphate and fibroblast-like growth factor 23 (FGF-23).
- These alterations contribute to declining vitamin D status and dysfunctional vitamin D metabolism.
- Elevated 25-hydroxyvitamin D-24-hydroxylase (CYP24A1) is implicated in these metabolic changes.
Purpose of the Study:
- To review the biochemistry and pathophysiology of CYP24A1.
- To explore the potential of CYP24A1 inhibitors for treating CKD patients.
Main Methods:
- Review of existing literature on CYP24A1 function and regulation.
- Analysis of data from uremic rat and human studies.
- Examination of the role of phosphate and FGF-23 in CYP24A1 expression.
Main Results:
- CYP24A1 catalyzes the catabolism of vitamin D metabolites (25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3).
- CYP24A1 expression is increased by elevated phosphate and FGF-23 in CKD.
- Polymorphisms in CYP24A1 have been identified, and its null phenotype confirms its catabolic role.
Conclusions:
- Increased CYP24A1 expression in CKD patients leads to decreased vitamin D status.
- Vitamin D deficiency can worsen renal osteodystrophy and other CKD complications.
- Targeting CYP24A1 activity is a potential strategy to correct vitamin D deficiency in CKD.
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